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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
5,700 |
1510.00777
|
William Kuszmaul
|
William Kuszmaul
|
Signed Enumeration of Upper-Right Corners in Path Shuffles
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We resolve a conjecture of Albert and Bousquet-Melou enumerating
quarter-plane walks with fixed horizontal and vertical projections according to
their upper-right-corner count modulo 2. In doing this, we introduce a signed
upper-right-corner count statistic. We find its distribution over planar walks
with any choice of fixed horizontal and vertical projections. Additionally, we
prove that the polynomial counting loops with a fixed horizontal and vertical
projection according to the absolute value of their signed upper-right-corner
count is $(x+1)$-positive. Finally, we conjecture an equivalence between
$(x+1)$-positivity of the generating function for upper-right-corner count and
signed upper-right-corner count.
|
[{'version': 'v1', 'created': 'Sat, 3 Oct 2015 05:41:18 GMT'}
{'version': 'v2', 'created': 'Fri, 28 Oct 2016 19:35:05 GMT'}]
|
2016-10-31
|
[array(['Kuszmaul', 'William', ''], dtype=object)]
|
5,701 |
2305.04106
|
Martin Weyssow
|
Martin Weyssow, Xin Zhou, Kisub Kim, David Lo and Houari Sahraoui
|
On the Usage of Continual Learning for Out-of-Distribution
Generalization in Pre-trained Language Models of Code
|
10+2 pages
| null | null | null |
cs.SE cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
Pre-trained language models (PLMs) have become a prevalent technique in deep
learning for code, utilizing a two-stage pre-training and fine-tuning procedure
to acquire general knowledge about code and specialize in a variety of
downstream tasks. However, the dynamic nature of software codebases poses a
challenge to the effectiveness and robustness of PLMs. In particular,
world-realistic scenarios potentially lead to significant differences between
the distribution of the pre-training and test data, i.e., distribution shift,
resulting in a degradation of the PLM's performance on downstream tasks. In
this paper, we stress the need for adapting PLMs of code to software data whose
distribution changes over time, a crucial problem that has been overlooked in
previous works. The motivation of this work is to consider the PLM in a
non-stationary environment, where fine-tuning data evolves over time according
to a software evolution scenario. Specifically, we design a scenario where the
model needs to learn from a stream of programs containing new, unseen APIs over
time. We study two widely used PLM architectures, i.e., a GPT2 decoder and a
RoBERTa encoder, on two downstream tasks, API call and API usage prediction. We
demonstrate that the most commonly used fine-tuning technique from prior work
is not robust enough to handle the dynamic nature of APIs, leading to the loss
of previously acquired knowledge i.e., catastrophic forgetting. To address
these issues, we implement five continual learning approaches, including
replay-based and regularization-based methods. Our findings demonstrate that
utilizing these straightforward methods effectively mitigates catastrophic
forgetting in PLMs across both downstream tasks while achieving comparable or
superior performance.
|
[{'version': 'v1', 'created': 'Sat, 6 May 2023 18:00:21 GMT'}]
|
2023-05-09
|
[array(['Weyssow', 'Martin', ''], dtype=object)
array(['Zhou', 'Xin', ''], dtype=object)
array(['Kim', 'Kisub', ''], dtype=object)
array(['Lo', 'David', ''], dtype=object)
array(['Sahraoui', 'Houari', ''], dtype=object)]
|
5,702 |
2008.11491
|
Sam Blakeman
|
Sam Blakeman, Denis Mareschal
|
Selective Particle Attention: Visual Feature-Based Attention in Deep
Reinforcement Learning
| null | null | null | null |
q-bio.NC cs.CV cs.LG cs.NE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The human brain uses selective attention to filter perceptual input so that
only the components that are useful for behaviour are processed using its
limited computational resources. We focus on one particular form of visual
attention known as feature-based attention, which is concerned with identifying
features of the visual input that are important for the current task regardless
of their spatial location. Visual feature-based attention has been proposed to
improve the efficiency of Reinforcement Learning (RL) by reducing the
dimensionality of state representations and guiding learning towards relevant
features. Despite achieving human level performance in complex perceptual-motor
tasks, Deep RL algorithms have been consistently criticised for their poor
efficiency and lack of flexibility. Visual feature-based attention therefore
represents one option for addressing these criticisms. Nevertheless, it is
still an open question how the brain is able to learn which features to attend
to during RL. To help answer this question we propose a novel algorithm, termed
Selective Particle Attention (SPA), which imbues a Deep RL agent with the
ability to perform selective feature-based attention. SPA learns which
combinations of features to attend to based on their bottom-up saliency and how
accurately they predict future reward. We evaluate SPA on a multiple choice
task and a 2D video game that both involve raw pixel input and dynamic changes
to the task structure. We show various benefits of SPA over approaches that
naively attend to either all or random subsets of features. Our results
demonstrate (1) how visual feature-based attention in Deep RL models can
improve their learning efficiency and ability to deal with sudden changes in
task structure and (2) that particle filters may represent a viable
computational account of how visual feature-based attention occurs in the
brain.
|
[{'version': 'v1', 'created': 'Wed, 26 Aug 2020 11:07:50 GMT'}]
|
2020-08-31
|
[array(['Blakeman', 'Sam', ''], dtype=object)
array(['Mareschal', 'Denis', ''], dtype=object)]
|
5,703 |
1002.1864
|
Eric Keto
|
Eric Keto and Qizhou Zhang
|
The standard model of star formation applied to massive stars: accretion
disks and envelopes in molecular lines
|
Accepted MNRAS
| null |
10.1111/j.1365-2966.2010.16672.x
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/publicdomain/
|
We address the question of whether the formation of high-mass stars is
similar to or differs from that of solar-mass stars through new molecular line
observations and modeling of the accretion flow around the massive protostar
IRAS20126+4104. We combine new observations of NH3(1,1) and (2,2) made at the
Very Large Array, new observations of CHCN(13-12) made at the Submillimeter
Array, previous VLA observations of NH(3,3), NH(4,4), and previous Plateau de
Bure observations of C34S(2-1), C34S(5-4), and CHCN(12-11) to obtain a data set
of molecular lines covering 15 to 419 K in excitation energy. We compare these
observations against simulated molecular line spectra predicted from a model
for high-mass star formation based on a scaled-up version of the standard
disk-envelope paradigm developed for accretion flows around low-mass stars. We
find that in accord with the standard paradigm, the observations require both a
warm, dense, rapidly-rotating disk and a cold, diffuse infalling envelope. This
study suggests that accretion processes around 10 M stars are similar to those
of solar mass stars.
|
[{'version': 'v1', 'created': 'Tue, 9 Feb 2010 19:18:25 GMT'}
{'version': 'v2', 'created': 'Tue, 16 Mar 2010 15:52:38 GMT'}]
|
2015-05-18
|
[array(['Keto', 'Eric', ''], dtype=object)
array(['Zhang', 'Qizhou', ''], dtype=object)]
|
5,704 |
2301.05735
|
Haowu Duan
|
Haowu Duan, Alex Kovner, Vladimir V. Skokov
|
Classical Entanglement and Entropy
|
19 pages
| null | null | null |
quant-ph nucl-th
|
http://creativecommons.org/licenses/by/4.0/
|
Motivated by recent discussions of entanglement in the context of high energy
scattering, we consider the relation between the entanglement entropy of a
highly excited state of a quantum system and the classical entanglement entropy
of the corresponding classical system. We show on the example of two weakly
coupled harmonic oscillators, that the two entropies are equal. Quantum
mechanically, the reduced density matrix which yields this entropy is close to
the maximally entangled state. We thus observe that the nature of entanglement
in this type of state is purely classical.
|
[{'version': 'v1', 'created': 'Fri, 13 Jan 2023 19:31:08 GMT'}]
|
2023-01-18
|
[array(['Duan', 'Haowu', ''], dtype=object)
array(['Kovner', 'Alex', ''], dtype=object)
array(['Skokov', 'Vladimir V.', ''], dtype=object)]
|
5,705 |
1709.06099
|
Mario G. Santos
|
Mario G. Santos, Michelle Cluver, Matt Hilton, Matt Jarvis, Gyula I.
G. Jozsa, Lerothodi Leeuw, Oleg Smirnov, Russ Taylor, Filipe Abdalla, Jose
Afonso, David Alonso, David Bacon, Bruce A. Bassett, Gianni Bernardi, Philip
Bull, Stefano Camera, H. Cynthia Chiang, Sergio Colafrancesco, Pedro G.
Ferreira, Jose Fonseca, Kurt van der Heyden, Ian Heywood, Kenda Knowles,
Michelle Lochner, Yin-Zhe Ma, Roy Maartens, Sphesihle Makhathini, Kavilan
Moodley, Alkistis Pourtsidou, Matthew Prescott, Jonathan Sievers, Kristine
Spekkens, Mattia Vaccari, Amanda Weltman, Imogen Whittam, Amadeus Witzemann,
Laura Wolz, Jonathan T. L. Zwart
|
MeerKLASS: MeerKAT Large Area Synoptic Survey
|
Larger version of the paper submitted to the Proceedings of Science,
"MeerKAT Science: On the Pathway to the SKA", Stellenbosch, 25-27 May 2016
| null | null | null |
astro-ph.CO astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the ground-breaking science that will be possible with a wide area
survey, using the MeerKAT telescope, known as MeerKLASS (MeerKAT Large Area
Synoptic Survey). The current specifications of MeerKAT make it a great fit for
science applications that require large survey speeds but not necessarily high
angular resolutions. In particular, for cosmology, a large survey over $\sim
4,000 \, {\rm deg}^2$ for $\sim 4,000$ hours will potentially provide the first
ever measurements of the baryon acoustic oscillations using the 21cm intensity
mapping technique, with enough accuracy to impose constraints on the nature of
dark energy. The combination with multi-wavelength data will give unique
additional information, such as exquisite constraints on primordial
non-Gaussianity using the multi-tracer technique, as well as a better handle on
foregrounds and systematics. Such a wide survey with MeerKAT is also a great
match for HI galaxy studies, providing unrivalled statistics in the pre-SKA era
for galaxies resolved in the HI emission line beyond local structures at z >
0.01. It will also produce a large continuum galaxy sample down to a depth of
about 5\,$\mu$Jy in L-band, which is quite unique over such large areas and
will allow studies of the large-scale structure of the Universe out to high
redshifts, complementing the galaxy HI survey to form a transformational
multi-wavelength approach to study galaxy dynamics and evolution. Finally, the
same survey will supply unique information for a range of other science
applications, including a large statistical investigation of galaxy clusters as
well as produce a rotation measure map across a huge swathe of the sky. The
MeerKLASS survey will be a crucial step on the road to using SKA1-MID for
cosmological applications and other commensal surveys, as described in the top
priority SKA key science projects (abridged).
|
[{'version': 'v1', 'created': 'Mon, 18 Sep 2017 18:00:22 GMT'}]
|
2017-09-20
|
[array(['Santos', 'Mario G.', ''], dtype=object)
array(['Cluver', 'Michelle', ''], dtype=object)
array(['Hilton', 'Matt', ''], dtype=object)
array(['Jarvis', 'Matt', ''], dtype=object)
array(['Jozsa', 'Gyula I. G.', ''], dtype=object)
array(['Leeuw', 'Lerothodi', ''], dtype=object)
array(['Smirnov', 'Oleg', ''], dtype=object)
array(['Taylor', 'Russ', ''], dtype=object)
array(['Abdalla', 'Filipe', ''], dtype=object)
array(['Afonso', 'Jose', ''], dtype=object)
array(['Alonso', 'David', ''], dtype=object)
array(['Bacon', 'David', ''], dtype=object)
array(['Bassett', 'Bruce A.', ''], dtype=object)
array(['Bernardi', 'Gianni', ''], dtype=object)
array(['Bull', 'Philip', ''], dtype=object)
array(['Camera', 'Stefano', ''], dtype=object)
array(['Chiang', 'H. Cynthia', ''], dtype=object)
array(['Colafrancesco', 'Sergio', ''], dtype=object)
array(['Ferreira', 'Pedro G.', ''], dtype=object)
array(['Fonseca', 'Jose', ''], dtype=object)
array(['van der Heyden', 'Kurt', ''], dtype=object)
array(['Heywood', 'Ian', ''], dtype=object)
array(['Knowles', 'Kenda', ''], dtype=object)
array(['Lochner', 'Michelle', ''], dtype=object)
array(['Ma', 'Yin-Zhe', ''], dtype=object)
array(['Maartens', 'Roy', ''], dtype=object)
array(['Makhathini', 'Sphesihle', ''], dtype=object)
array(['Moodley', 'Kavilan', ''], dtype=object)
array(['Pourtsidou', 'Alkistis', ''], dtype=object)
array(['Prescott', 'Matthew', ''], dtype=object)
array(['Sievers', 'Jonathan', ''], dtype=object)
array(['Spekkens', 'Kristine', ''], dtype=object)
array(['Vaccari', 'Mattia', ''], dtype=object)
array(['Weltman', 'Amanda', ''], dtype=object)
array(['Whittam', 'Imogen', ''], dtype=object)
array(['Witzemann', 'Amadeus', ''], dtype=object)
array(['Wolz', 'Laura', ''], dtype=object)
array(['Zwart', 'Jonathan T. L.', ''], dtype=object)]
|
5,706 |
hep-th/0212069
|
Romuald A. Janik
|
R.A. Janik, N.A. Obers
|
SO(N) Superpotential, Seiberg-Witten Curves and Loop Equations
|
13 pages; v2: minor typos, one equation added
|
Phys.Lett. B553 (2003) 309-316
|
10.1016/S0370-2693(02)03232-X
| null |
hep-th
| null |
We consider the exact superpotential of N=1 super Yang-Mills theory with
gauge group SO(N) and arbitrary tree-level polynomial superpotential of one
adjoint Higgs field. A field-theoretic derivation of the glueball
superpotential is given, based on factorization of the N=2 Seiberg-Witten
curve. Following the conjecture of Dijkgraaf and Vafa, the result is matched
with the corresponding SO(N) matrix model prediction. The verification involves
an explicit solution of the first non-trivial loop equation, relating the
spherical free energy to that of the non-orientable surfaces with topology
$RP^2$.
|
[{'version': 'v1', 'created': 'Thu, 5 Dec 2002 16:41:30 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Jan 2003 11:10:46 GMT'}]
|
2010-04-05
|
[array(['Janik', 'R. A.', ''], dtype=object)
array(['Obers', 'N. A.', ''], dtype=object)]
|
5,707 |
1507.07253
|
Andrei Maimistov
|
Ekaterina I. Lyashko, Andrey I. Maimistov
|
Linear guided waves in hyperbolic slab waveguide. Dispersion relations
|
8 pages, 4 figures, paper is submitted to Quantum Electronics
| null | null | null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Guided waves modes in a slab waveguide formed from the isotropic dielectric
layer embedded by hyperbolic materials are investigated. Optical axis is normal
to the slab plane. The dispersion relations for TE and TM waves are found. The
differences between hyperbolic waveguide and conventional one are demonstrated.
In particular, for each TM mode of hyperbolic waveguide there are two cut-off
frequencies and the number of modes is limited. For the TE and TM modes
Poynting vector component along the wave's propagation axis could be equal to
zero.
|
[{'version': 'v1', 'created': 'Sun, 26 Jul 2015 21:16:38 GMT'}]
|
2015-07-28
|
[array(['Lyashko', 'Ekaterina I.', ''], dtype=object)
array(['Maimistov', 'Andrey I.', ''], dtype=object)]
|
5,708 |
1105.1665
|
Montse Villar-Martin
|
M. Villar-Martin, C. Tadhunter, A. Humphrey, R. Fraga-Encinas, R.
Gonzalez Delgado, M. Perez Torres, A. Martinez-Sansigre
|
Interactions, star formation and extended nebulae in SDSS type 2 quasars
at 0.3<~ z <~ 0.6
|
Accepted for publication in MNRAS. 19 pages, 30 figures
| null |
10.1111/j.1365-2966.2011.19031.x
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present long-slit spectroscopy and imaging data obtained with FORS2 on the
Very Large Telescope of 13 optically selected type 2 quasars at z~0.3-0.6 from
the original sample of Zakamska et al. (2003). The sample is likely to be
affected by different selection biases. We investigate the evidence for: a)
mergers/interactions b) star formation activity in the neighborhood of the
quasars and c) extended emission line regions and their nature. Evidence for
mergers/interactions is found in 5/13 objects. This is a lower limit for our
sample, given the shallowness of most of our continuum images. Although AGN
photoionization cannot be totally discarded, line ratios consistent with
stellar photoionization are found in general in companion galaxies/knots/nuclei
near these same objects. On the contrary, the gas in the neighborhood of the
quasar nucleus shows line ratios inconsistent with HII galaxies and typical of
AGN photoionized nebulae. A natural scenario to explain the observations is
that star formation is ongoing in companion galaxies/knots/nuclei, possibly
triggered by the interactions. These systems are, therefore, composite in their
emission line properties showing a combination of AGN and star formation
features.
Extended emission line regions (EELRs) have been found in 7/13 objects,
although this fraction might be higher if a complete spatial coverage around
the quasars was performed. The sizes vary between few and up to 64 kpc. In
general, the EELRs apparently consist of an extended nebula associated with the
quasar. In at least one case the EELR is associated with ionized tidal
features.
|
[{'version': 'v1', 'created': 'Mon, 9 May 2011 13:18:43 GMT'}]
|
2015-05-28
|
[array(['Villar-Martin', 'M.', ''], dtype=object)
array(['Tadhunter', 'C.', ''], dtype=object)
array(['Humphrey', 'A.', ''], dtype=object)
array(['Fraga-Encinas', 'R.', ''], dtype=object)
array(['Delgado', 'R. Gonzalez', ''], dtype=object)
array(['Torres', 'M. Perez', ''], dtype=object)
array(['Martinez-Sansigre', 'A.', ''], dtype=object)]
|
5,709 |
1907.09543
|
Adrian Albert
|
Adrian Albert and Jasleen Kaur and Emanuele Strano and Marta Gonzalez
|
Spatial sensitivity analysis for urban land use prediction with
physics-constrained conditional generative adversarial networks
|
8 pages
| null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Accurately forecasting urban development and its environmental and climate
impacts critically depends on realistic models of the spatial structure of the
built environment, and of its dependence on key factors such as population and
economic development. Scenario simulation and sensitivity analysis, i.e.,
predicting how changes in underlying factors at a given location affect
urbanization outcomes at other locations, is currently not achievable at a
large scale with traditional urban growth models, which are either too
simplistic, or depend on detailed locally-collected socioeconomic data that is
not available in most places. Here we develop a framework to estimate, purely
from globally-available remote-sensing data and without parametric assumptions,
the spatial sensitivity of the (\textit{static}) rate of change of urban sprawl
to key macroeconomic development indicators. We formulate this spatial
regression problem as an image-to-image translation task using conditional
generative adversarial networks (GANs), where the gradients necessary for
comparative static analysis are provided by the backpropagation algorithm used
to train the model. This framework allows to naturally incorporate physical
constraints, e.g., the inability to build over water bodies. To validate the
spatial structure of model-generated built environment distributions, we use
spatial statistics commonly used in urban form analysis. We apply our method to
a novel dataset comprising of layers on the built environment, nightlighs
measurements (a proxy for economic development and energy use), and population
density for the world's most populous 15,000 cities.
|
[{'version': 'v1', 'created': 'Mon, 22 Jul 2019 19:32:43 GMT'}]
|
2019-07-24
|
[array(['Albert', 'Adrian', ''], dtype=object)
array(['Kaur', 'Jasleen', ''], dtype=object)
array(['Strano', 'Emanuele', ''], dtype=object)
array(['Gonzalez', 'Marta', ''], dtype=object)]
|
5,710 |
1511.08259
|
Pablo Barberis-Blostein
|
Marduk Bola\~nos and Pablo Barberis-Blostein
|
Algebraic solution of the Lindblad equation for a collection of
multilevel systems coupled to independent environments
| null |
Journal of Physics A: Mathematical and Theoretical, Volume 48,
Issue 44, article id. 445301 (2015)
|
10.1088/1751-8113/48/44/445301
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the Lindblad equation for a collection of multilevel systems
coupled to independent environments. The equation is symmetric under the
exchange of the labels associated with each system and thus the open-system
dynamics takes place in the permutation-symmetric subspace of the operator
space. The dimension of this space grows polynomially with the number of
systems. We construct a basis of this space and a set of superoperators whose
action on this basis is easily specified. For a given number of levels, $M$,
these superoperators are written in terms of a bosonic realization of the
generators of the Lie algebra $\sln{M^2}$. In some cases, these results enable
finding an analytic solution of the master equation using known Lie-algebraic
methods. To demonstrate this, we obtain an analytic expression for the state
operator of a collection of three-level atoms coupled to independent radiation
baths. When analytic solutions are difficult to find, the basis and the
superoperators can be used to considerably reduce the computational resources
required for simulations.
|
[{'version': 'v1', 'created': 'Thu, 26 Nov 2015 00:50:36 GMT'}]
|
2015-11-30
|
[array(['Bolaños', 'Marduk', ''], dtype=object)
array(['Barberis-Blostein', 'Pablo', ''], dtype=object)]
|
5,711 |
2211.10269
|
Hans van Haren
|
Hans van Haren
|
Convection and intermittency noise in water temperature near a deep
Mediterranean seafloor
|
23 pages, 5 figures
|
Physics of Fluids, 2023, 35, 026604
|
10.1063/5.0139474
| null |
physics.flu-dyn physics.ao-ph
|
http://creativecommons.org/licenses/by/4.0/
|
Turbulent and internal wave motions are important for the exchange of
momentum, heat and suspended matter in the deep-sea which is generally stably
stratified in density. Turbulence-generation models involve shear of vertical
current differences that deforms the stratified waters, and convection that is
drive by (unstable) buoyancy. Shear-generation is found more general in the
well-stratified ocean-interior, while convection is known to occur near the
sea-surface, e.g. via nighttime cooling. Far below the surface, the
Western-Mediterranean Sea is very weakly stratified and offers opportunity to
observationally study deep-sea convection. An opportunistic small set of
high-resolution temperature sensors demonstrates not only classic
internal-wave-induced turbulence, but also convection attributed to geothermal
heating and spectral properties that relate to various chaos-theory models such
as 1/sigma pink noise (sigma denoting frequency), mainly found lying at (0.01 m
above) the seafloor, and 1/sigma^2 Brownian noise, mainly found on a moored
line at about 100 m above the seafloor. Near-inertial temperature variations
are observed to occur down to the seafloor thereby disturbing the local
convective turbulence regime to shear-dominated one temporarily. The integral
turbulence time-scale is generally smaller (with dominant higher frequency
motions) at the seafloor than about 100 m above it.
|
[{'version': 'v1', 'created': 'Fri, 18 Nov 2022 14:55:14 GMT'}
{'version': 'v2', 'created': 'Mon, 20 Mar 2023 09:19:24 GMT'}]
|
2023-03-21
|
[array(['van Haren', 'Hans', ''], dtype=object)]
|
5,712 |
2001.09613
|
Masashi Kimura
|
Masashi Kimura
|
Note on the parametrized black hole quasinormal ringdown formalism
|
10 pages, v2: minor revisions, v3: title changed, accepted for
publication in Phys. Rev. D, v4: corrected typo in Eq.(10)
|
Phys. Rev. D 101, 064031 (2020)
|
10.1103/PhysRevD.101.064031
|
RUP-20-2
|
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The parametrized black hole quasinormal ringdown formalism is useful to
compute quasinormal mode (QNM) frequencies if a master equation for the
gravitational perturbation around a black hole has a small deviation from the
Regge-Wheeler or Zerilli equation. In this formalism, the deviation of QNM
frequency from general relativity can be calculated by small deviation
parameters and model independent coefficients. In this paper, we derive
recursion relations for the model independent coefficients. Using these
relations, the higher order coefficients are written only by the lower order
coefficients. Thus, we only need the lower order coefficients when we
numerically compute the model independent coefficients.
|
[{'version': 'v1', 'created': 'Mon, 27 Jan 2020 07:38:21 GMT'}
{'version': 'v2', 'created': 'Sat, 1 Feb 2020 01:32:44 GMT'}
{'version': 'v3', 'created': 'Mon, 2 Mar 2020 13:11:09 GMT'}
{'version': 'v4', 'created': 'Thu, 26 Jan 2023 03:56:21 GMT'}]
|
2023-01-27
|
[array(['Kimura', 'Masashi', ''], dtype=object)]
|
5,713 |
cond-mat/0504766
|
Emil Yuzbashyan
|
Michael V. Feigel'man, Lev B. Ioffe, and Emil A. Yuzbashyan
|
Theory of superconducting pairing near the mobility edge
|
4 pages, 2 figures
| null | null | null |
cond-mat.supr-con cond-mat.str-el
| null |
We develop a theory of a pseudogap state appearing near the
superconductor-insulator transition in strongly disordered metals with
attractive interaction. We show that such an interaction combined with the
fractal nature of the single particle wave functions near the mobility edge
leads to an anomalously large single particle gap in the superconducting state
near SI transition that persists and even increases in the insulating state
long after the superconductivity is destroyed. We give analytic expressions for
the value of the pseudogap in terms of the inverse participation ratio of the
corresponding localization problem.
|
[{'version': 'v1', 'created': 'Thu, 28 Apr 2005 18:13:11 GMT'}]
|
2007-05-23
|
[array(["Feigel'man", 'Michael V.', ''], dtype=object)
array(['Ioffe', 'Lev B.', ''], dtype=object)
array(['Yuzbashyan', 'Emil A.', ''], dtype=object)]
|
5,714 |
2104.02693
|
Richard Firestone
|
Richard B. Firestone
|
Spin/Parity Dependent Level Density
| null | null | null | null |
nucl-th nucl-ex
|
http://creativecommons.org/publicdomain/zero/1.0/
|
It is shown that the Constant Temperature (CT) model of nuclear level density
is a direct consequence of a symmetrized Poisson distribution of nuclear level
spacings. The standard CT model describing the total level density is shown to
be fatally flawed due to discontinuities at the Yrast energies, the onset of
new $J^{\pi}$ sequences, that disrupt the exponential formula and cause the
back shift parameter to become nonphysically negative. A new CT-JPI level
density model is proposed with a constant temperature and separate back shift
parameters for each $J^{\pi}$ sequence. The CT-JPI model is also constrained to
reproduce the spin distribution predicted by Ericson's spin distribution
function at the neutron separation energy. A fitting procedure is described for
determining the temperature $T$, back shifts $E_0(J^{\pi})$, and spin cutoff
parameters $\sigma_c$ from nuclear structure and resonance data. The CT-JPI
model is demonstrated to successfully predict the level densities for a wide
range of spins and parities for 46 nuclear with Z=7-92. In variance with
earlier predictions the spin cut-off parameters show no mass dependence and
instead substantial variation at all mass regions.
|
[{'version': 'v1', 'created': 'Tue, 6 Apr 2021 17:39:34 GMT'}]
|
2021-04-07
|
[array(['Firestone', 'Richard B.', ''], dtype=object)]
|
5,715 |
hep-ph/0308233
|
Davison E. Soper
|
Davison E. Soper
|
Partons and Jets at the LHC
|
Talk at the conference QCD2002 at IIT Kanpur, India, November 2002.
Ten pages with 12 figures
|
Pramana61:793-802,2003
|
10.1007/BF02704448
| null |
hep-ph
| null |
I review some issues related to short distance QCD and its relation to the
experimental program of the Large Hadron Collider (LHC) now under construction
in Geneva.
|
[{'version': 'v1', 'created': 'Fri, 22 Aug 2003 20:03:21 GMT'}]
|
2008-11-26
|
[array(['Soper', 'Davison E.', ''], dtype=object)]
|
5,716 |
1711.09131
|
Salar Fattahi
|
Salar Fattahi, Richard Y. Zhang, Somayeh Sojoudi
|
Sparse Inverse Covariance Estimation for Chordal Structures
| null | null | null | null |
stat.ML stat.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we consider the Graphical Lasso (GL), a popular optimization
problem for learning the sparse representations of high-dimensional datasets,
which is well-known to be computationally expensive for large-scale problems.
Recently, we have shown that the sparsity pattern of the optimal solution of GL
is equivalent to the one obtained from simply thresholding the sample
covariance matrix, for sparse graphs under different conditions. We have also
derived a closed-form solution that is optimal when the thresholded sample
covariance matrix has an acyclic structure. As a major generalization of the
previous result, in this paper we derive a closed-form solution for the GL for
graphs with chordal structures. We show that the GL and thresholding
equivalence conditions can significantly be simplified and are expected to hold
for high-dimensional problems if the thresholded sample covariance matrix has a
chordal structure. We then show that the GL and thresholding equivalence is
enough to reduce the GL to a maximum determinant matrix completion problem and
drive a recursive closed-form solution for the GL when the thresholded sample
covariance matrix has a chordal structure. For large-scale problems with up to
450 million variables, the proposed method can solve the GL problem in less
than 2 minutes, while the state-of-the-art methods converge in more than 2
hours.
|
[{'version': 'v1', 'created': 'Fri, 24 Nov 2017 20:45:26 GMT'}]
|
2017-11-28
|
[array(['Fattahi', 'Salar', ''], dtype=object)
array(['Zhang', 'Richard Y.', ''], dtype=object)
array(['Sojoudi', 'Somayeh', ''], dtype=object)]
|
5,717 |
2012.02003
|
Basile Audoly
|
Basile Audoly and Claire Lestringant
|
Asymptotic derivation of high-order rod models from non-linear 3D
elasticity
| null | null |
10.1016/j.jmps.2020.104264
| null |
cond-mat.soft
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
We propose a method for deriving equivalent one-dimensional models for
slender non-linear structures. The approach is designed to be broadly
applicable, and can handle in principle finite strains, finite rotations,
arbitrary cross-sections shapes, inhomogeneous elastic properties across the
cross-section, arbitrary elastic constitutive laws (possibly with low symmetry)
and arbitrary distributions of pre-strain, including finite pre-strain. It is
based on a kinematic parameterization of the actual configuration that makes
use of a center-line, a frame of directors, and local degrees of freedom
capturing the detailed shape of cross-sections. A relaxation method is applied
that holds the framed center-line fixed while relaxing the local degrees of
freedom; it is asymptotically valid when the macroscopic strain and the
properties of the rod vary slowly in the longitudinal direction. The outcome is
a one-dimensional strain energy depending on the apparent stretching, bending
and twisting strain of the framed center-line; the dependence on the strain
gradients is also captured, yielding an equivalent rod model that is
asymptotically exact to higher order. The method is presented in a fully
non-linear setting and it is verified against linear and weakly non-linear
solutions available from the literature.
|
[{'version': 'v1', 'created': 'Thu, 3 Dec 2020 15:31:56 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Dec 2020 09:23:10 GMT'}]
|
2021-02-03
|
[array(['Audoly', 'Basile', ''], dtype=object)
array(['Lestringant', 'Claire', ''], dtype=object)]
|
5,718 |
2103.15267
|
Taiki Morinaga
|
Taiki Morinaga
|
Fast neutrino flavor instability and neutrino flavor lepton number
crossings
|
7 pages, 2 figures, accepted for publication in PRD
| null |
10.1103/PhysRevD.105.L101301
| null |
hep-ph astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we show the equivalency between the existence of fast neutrino
flavor instability and that of neutrino flavor lepton number (NFLN) crossings,
which indicates that an NFLN angular distribution takes both signs. The
veracity of this proposition has been uncertain and sometimes controversial
despite its indispensability in the flavor evolutions of dense neutrinos. This
study clarifies that the occurrence of an NFLN crossing is both necessary and
sufficient for fast instability.
|
[{'version': 'v1', 'created': 'Mon, 29 Mar 2021 01:39:32 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Mar 2022 23:50:50 GMT'}]
|
2022-05-25
|
[array(['Morinaga', 'Taiki', ''], dtype=object)]
|
5,719 |
1705.08297
|
Satish K. Pandey
|
Satish K. Pandey
|
Universally symmetric norming operators are compact
|
Version III Comments: 18 pages. New section (Section 3) has been
added. Version II Comments: 16 pages. The results of this article answer an
important question that derives its origin from my previous article
arXiv:1610.02095 and thus the preliminary section of this article draws
heavily from the preliminary section of the previous article. A few minor
typos corrected and References updated
| null | null | null |
math.FA math.OA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study a specific family of symmetric norms on the algebra $\mathcal
B(\mathcal H)$ of operators on a separable infinite-dimensional Hilbert space.
With respect to each symmetric norm in this family the identity operator fails
to attain its norm. Using this, we generalize one of the main results from
\cite{SP}; the hypothesis is relaxed, and consequently, the family of symmetric
norms for which the result holds is extended.
We introduce and study the concepts of "universally symmetric norming
operators" and "universally absolutely symmetric norming operators" on a
separable Hilbert space. These refer to the operators that are, respectively,
norming and absolutely norming, with respect to every symmetric norm on
$\mathcal B(\mathcal H)$. We establish a characterization theorem for such
operators and prove that these classes are identical, and that they coincide
with the class of compact operators. In particular, we provide an alternative
characterization of compact operators on a separable infinite-dimensional
Hilbert space.
|
[{'version': 'v1', 'created': 'Sun, 21 May 2017 20:41:15 GMT'}
{'version': 'v2', 'created': 'Sun, 6 Aug 2017 22:04:22 GMT'}
{'version': 'v3', 'created': 'Wed, 23 Sep 2020 17:35:02 GMT'}]
|
2020-09-24
|
[array(['Pandey', 'Satish K.', ''], dtype=object)]
|
5,720 |
hep-th/0104232
|
Sang-Jin Sin
|
Sunggeun Lee, Sang-Jin Sin (Hanyang University)
|
Wilson Loop and Dimensional Reduction in Non-Commutative Gauge Theories
|
v2: references added, v3:include comparison with hep-th/0010256.
v4=v3(mailer error), v5= to appear in prD
|
Phys.Rev.D64:086002,2001
|
10.1103/PhysRevD.64.086002
| null |
hep-th
| null |
Using the AdS/CFT correspondence we study UV behavior of Wilson loops in
various noncommutative gauge theories. We get an area law in most cases and try
to identify its origin. In D3 case, we may identify the the origin as the D1
dominance over the D3: as we go to the boundary of the AdS space, the effect of
the flux of the D3 charge is highly suppressed, while the flux due to the D1
charge is enhenced. So near the boundary the theory is more like a theory on D1
brane than that on D3 brane. This phenomena is closely related to the
dimensional reduction due to the strong magnetic field in the charged particle
in the magnetic field. The linear potential is not due to the confinement by IR
effect but is the analogue of Coulomb's potential in 1+1 dimension.
|
[{'version': 'v1', 'created': 'Thu, 26 Apr 2001 08:44:54 GMT'}
{'version': 'v2', 'created': 'Mon, 30 Apr 2001 11:54:15 GMT'}
{'version': 'v3', 'created': 'Sun, 8 Jul 2001 01:12:38 GMT'}
{'version': 'v4', 'created': 'Tue, 17 Jul 2001 13:36:47 GMT'}
{'version': 'v5', 'created': 'Thu, 16 Aug 2001 08:29:10 GMT'}]
|
2010-05-28
|
[array(['Lee', 'Sunggeun', '', 'Hanyang University'], dtype=object)
array(['Sin', 'Sang-Jin', '', 'Hanyang University'], dtype=object)]
|
5,721 |
1303.6027
|
Yoshinori Okada
|
Yoshinori Okada, Daniel Walkup, Hsin Lin, Chetan Dhital, Tay-Rong
Chang, Sovit Khadka, Wenwen Zhou, Horng-Tay Jeng, Arun Bansil, Ziqiang Wang,
Stephen Wilson, Vidya Madhavan
|
Imaging the evolution of metallic states in a spin-orbit interaction
driven correlated iridate
| null |
Nature Materials 12, 707 (2013)
|
10.1038/nmat3653
| null |
cond-mat.mtrl-sci cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Ruddlesden-Popper (RP) series of iridates (Srn+1IrnO3n+1) have been the
subject of much recent attention due to the anticipation of emergent physics
arising from the cooperative action of spin-orbit (SO) driven band splitting
and Coulomb interactions[1-3]. However an ongoing debate over the role of
correlations in the formation of the charge gap and a lack of understanding of
the effects of doping on the low energy electronic structure have hindered
experimental progress in realizing many of the predicted states[4-8] including
possible high-Tc superconductivity[7,9]. Using scanning tunneling spectroscopy
we map out the spatially resolved density of states in the n=2 RP member,
Sr3Ir2O7 (Ir327). We show that the Ir327 parent compound, argued to exist only
as a weakly correlated band insulator in fact possesses a substantial ~130meV
charge excitation gap driven by an interplay between structure, SO coupling and
correlations. A critical component in distinguishing the intrinsic electronic
character within the inhomogeneous textured electronic structure is our
identification of the signature of missing apical oxygen defects, which play a
critical role in many of the layered oxides. Our measurements combined with
insights from calculations reveal how apical oxygen vacancies transfer spectral
weight from higher energies to the gap energies thereby revealing a path toward
obtaining metallic electronic states from the parent-insulating states in the
iridates.
|
[{'version': 'v1', 'created': 'Mon, 25 Mar 2013 04:46:27 GMT'}]
|
2015-06-15
|
[array(['Okada', 'Yoshinori', ''], dtype=object)
array(['Walkup', 'Daniel', ''], dtype=object)
array(['Lin', 'Hsin', ''], dtype=object)
array(['Dhital', 'Chetan', ''], dtype=object)
array(['Chang', 'Tay-Rong', ''], dtype=object)
array(['Khadka', 'Sovit', ''], dtype=object)
array(['Zhou', 'Wenwen', ''], dtype=object)
array(['Jeng', 'Horng-Tay', ''], dtype=object)
array(['Bansil', 'Arun', ''], dtype=object)
array(['Wang', 'Ziqiang', ''], dtype=object)
array(['Wilson', 'Stephen', ''], dtype=object)
array(['Madhavan', 'Vidya', ''], dtype=object)]
|
5,722 |
2210.17030
|
Kei Nakagawa Ph.D
|
Yugo Fujimoto, Kei Nakagawa, Kentaro Imajo, Kentaro Minami
|
Uncertainty Aware Trader-Company Method: Interpretable Stock Price
Prediction Capturing Uncertainty
|
IEEE BIGDATA 2022 Accepted
| null | null | null |
q-fin.CP cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Machine learning is an increasingly popular tool with some success in
predicting stock prices. One promising method is the Trader-Company~(TC)
method, which takes into account the dynamism of the stock market and has both
high predictive power and interpretability. Machine learning-based stock
prediction methods including the TC method have been concentrating on point
prediction. However, point prediction in the absence of uncertainty estimates
lacks credibility quantification and raises concerns about safety. The
challenge in this paper is to make an investment strategy that combines high
predictive power and the ability to quantify uncertainty. We propose a novel
approach called Uncertainty Aware Trader-Company Method~(UTC) method. The core
idea of this approach is to combine the strengths of both frameworks by merging
the TC method with the probabilistic modeling, which provides probabilistic
predictions and uncertainty estimations. We expect this to retain the
predictive power and interpretability of the TC method while capturing the
uncertainty. We theoretically prove that the proposed method estimates the
posterior variance and does not introduce additional biases from the original
TC method. We conduct a comprehensive evaluation of our approach based on the
synthetic and real market datasets. We confirm with synthetic data that the UTC
method can detect situations where the uncertainty increases and the prediction
is difficult. We also confirmed that the UTC method can detect abrupt changes
in data generating distributions. We demonstrate with real market data that the
UTC method can achieve higher returns and lower risks than baselines.
|
[{'version': 'v1', 'created': 'Mon, 31 Oct 2022 03:07:07 GMT'}
{'version': 'v2', 'created': 'Wed, 2 Nov 2022 05:04:48 GMT'}]
|
2022-11-03
|
[array(['Fujimoto', 'Yugo', ''], dtype=object)
array(['Nakagawa', 'Kei', ''], dtype=object)
array(['Imajo', 'Kentaro', ''], dtype=object)
array(['Minami', 'Kentaro', ''], dtype=object)]
|
5,723 |
2009.01680
|
Yuehua Su
|
Yuehua Su, Shengyan Wang, and Chao Zhang
|
Coincidence inelastic neutron scattering for detection of two-spin
magnetic correlations
|
10 pages, 1 figure; Revised version for publication
|
Phys. Rev. B 103, 054431 (2021)
|
10.1103/PhysRevB.103.054431
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inelastic neutron scattering (INS) is one powerful technique to study the
low-energy single-spin dynamics of magnetic materials. A variety of quantum
magnets show novel magnetic correlations such as quantum spin liquids. These
novel magnetic correlations are beyond the direct detection of INS. In this
paper we propose a coincidence technique, coincidence inelastic neutron
scattering (cINS), which can detect the two-spin magnetic correlations of the
magnetic materials. In cINS there are two neutron sources and two neutron
detectors with an additional coincidence detector. Two neutrons from the two
neutron sources are incident on the target magnetic material, and they are
scattered by the electron spins of the magnetic material. The two scattered
neutrons are detected by the two neutron detectors in coincidence with the
coincidence probability described by a two-spin Bethe-Salpeter wave function.
Since the two-spin Bethe-Salpeter wave function defines the momentum-resolved
dynamical wave function with two spins excited, cINS can explicitly detect the
two-spin magnetic correlations of the magnetic material. Thus, it can be
introduced to study the various spin valence bond states of the quantum
magnets.
|
[{'version': 'v1', 'created': 'Thu, 3 Sep 2020 14:04:33 GMT'}
{'version': 'v2', 'created': 'Sat, 27 Feb 2021 09:06:27 GMT'}]
|
2021-03-03
|
[array(['Su', 'Yuehua', ''], dtype=object)
array(['Wang', 'Shengyan', ''], dtype=object)
array(['Zhang', 'Chao', ''], dtype=object)]
|
5,724 |
1210.2730
|
Shiang-Yu Wang Dr.
|
Shiang-Yu Wang, Yen-Shan Hu, Chi-Hung Yan, Yin-Chang Chang, Naoyuki
Tamura, Naruhisa Takato, Atsushi Shimono, Jennifer Karr, Youichi Ohyama,
Hsin-Yo Chen, Hung-Hsu Ling, Hiroshi Karoji, Hajime Sugai, Akitoshi Ueda
|
The metrology cameras for Subaru PFS and FMOS
|
7 pages, 5 figures; Ground-based and Airborne Instrumentation for
Astronomy IV, Proc. SPIE 8446 (2012)
| null |
10.1117/12.926954
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Prime Focus Spectrograph (PFS) is a new multi-fiber spectrograph on
Subaru telescope. PFS will cover around 1.4 degree diameter field with ~2400
fibers. To ensure precise positioning of the fibers, a metrology camera is
designed to provide the fiber position information within 5 {\mu}m error. The
final positioning accuracy of PFS is targeted to be better than 10 {\mu}m. The
metrology camera will locate at the Cassegrain focus of Subaru telescope to
cover the whole focal plane. The PFS metrology camera will also serve for the
existing multi-fiber infrared spectrograph FMOS.
|
[{'version': 'v1', 'created': 'Tue, 9 Oct 2012 20:01:23 GMT'}]
|
2012-10-11
|
[array(['Wang', 'Shiang-Yu', ''], dtype=object)
array(['Hu', 'Yen-Shan', ''], dtype=object)
array(['Yan', 'Chi-Hung', ''], dtype=object)
array(['Chang', 'Yin-Chang', ''], dtype=object)
array(['Tamura', 'Naoyuki', ''], dtype=object)
array(['Takato', 'Naruhisa', ''], dtype=object)
array(['Shimono', 'Atsushi', ''], dtype=object)
array(['Karr', 'Jennifer', ''], dtype=object)
array(['Ohyama', 'Youichi', ''], dtype=object)
array(['Chen', 'Hsin-Yo', ''], dtype=object)
array(['Ling', 'Hung-Hsu', ''], dtype=object)
array(['Karoji', 'Hiroshi', ''], dtype=object)
array(['Sugai', 'Hajime', ''], dtype=object)
array(['Ueda', 'Akitoshi', ''], dtype=object)]
|
5,725 |
1907.04299
|
Mustafa Kishk
|
Mustafa A. Kishk, Ahmed Bader, and Mohamed-Slim Alouini
|
On the 3-D Placement of Airborne Base Stations Using Tethered UAVs
| null | null | null | null |
cs.IT cs.NI math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One of the main challenges slowing the deployment of airborne base stations
(BSs) using unmanned aerial vehicles (UAVs) is the limited on-board energy and
flight time. One potential solution to such problem, is to provide the UAV with
power supply through a tether that connects the UAV to the ground. In this
paper, we study the optimal placement of tethered UAVs (TUAVs) to minimize the
average path-loss between the TUAV and a receiver located on the ground. Given
that the tether has a maximum length, and the launching point of the TUAV (the
starting point of the tether) is placed on a rooftop, the TUAV is only allowed
to hover within a specific hovering region. Beside the maximum tether length,
this hovering region also depends on the heights of the buildings surrounding
the rooftop, which requires the inclination angle of the tether not to be below
a given minimum value, in order to avoid tangling and ensure safety. We first
formulate the optimization problem for such setup and provide some useful
insights on its solution. Next, we derive upper and lower bounds for the
optimal values of the tether length and inclination angle. We also propose a
suboptimal closed-form solution for the tether length and its inclination angle
that is based on maximizing the line-of-sight probability. Finally, we derive
the probability distribution of the minimum inclination angle of the tether
length. We show that its mean value varies depending on the environment from 10
degrees in suburban environments to 31 degrees in high rise urban environments.
Our numerical results show that the derived upper and lower bounds on the
optimal values of the tether length and inclination angle lead to tight
suboptimal values of the average path-loss that are only 0-3 dBs above the
minimum value.
|
[{'version': 'v1', 'created': 'Tue, 9 Jul 2019 17:34:24 GMT'}]
|
2019-07-10
|
[array(['Kishk', 'Mustafa A.', ''], dtype=object)
array(['Bader', 'Ahmed', ''], dtype=object)
array(['Alouini', 'Mohamed-Slim', ''], dtype=object)]
|
5,726 |
0908.4131
|
Denis Gokhfeld
|
D.M. Gokhfeld, D.A. Balaev, S.I. Popkov, K.A. Shaykhutdinov, M.I.
Petrov
|
Asymmetry of magnetization curves of textured BSCCO
|
4 pages, 1 figure, will be published in Physica C
|
Physica C, Vol. 470 (2010) S870-S872
|
10.1016/j.physc.2009.10.049
|
PHYSC1250649
|
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The dependence of magnetization on magnetic field M(H) was measured for
textured BSCCO samples for H || c, H || ab at different temperatures. Inclusion
of the pinning parameter in the Valkov-Khrustalev model [V.V. Valkov, B.P.
Khrustalev, JETP 80 (1995) 680] allowed to describe successfully the asymmetric
M(H) dependencies. The temperature and magnetic field dependencies of critical
current and pinning parameter for H || c and H || ab were estimated.
|
[{'version': 'v1', 'created': 'Fri, 28 Aug 2009 04:40:34 GMT'}]
|
2011-01-12
|
[array(['Gokhfeld', 'D. M.', ''], dtype=object)
array(['Balaev', 'D. A.', ''], dtype=object)
array(['Popkov', 'S. I.', ''], dtype=object)
array(['Shaykhutdinov', 'K. A.', ''], dtype=object)
array(['Petrov', 'M. I.', ''], dtype=object)]
|
5,727 |
1107.6018
|
Cheng Jin
|
Guoli Wang, Cheng Jin, Anh-Thu Le, and C. D. Lin
|
Influence of gas pressure on high-order harmonic generation of Ar and Ne
|
7 figures
|
Phys. Rev. A 84, 053404 (2011)
|
10.1103/PhysRevA.84.053404
| null |
physics.atom-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the effect of gas pressure on the generation of high-order harmonics
where harmonics due to individual atoms are calculated using the recently
developed quantitative rescattering theory, and the propagation of the laser
and harmonics in the medium is calculated by solving the Maxwell's wave
equation. We illustrate that the simulated spectra are very sensitive to the
laser focusing conditions at high laser intensity and high pressure since the
fundamental laser field is severely reshaped during the propagation. By
comparing the simulated results with several experiments we show that the
pressure dependence can be qualitatively explained. The lack of quantitative
agreement is tentatively attributed to the failure of the complete knowledge of
the experimental conditions.
|
[{'version': 'v1', 'created': 'Fri, 29 Jul 2011 16:49:08 GMT'}]
|
2011-11-10
|
[array(['Wang', 'Guoli', ''], dtype=object)
array(['Jin', 'Cheng', ''], dtype=object)
array(['Le', 'Anh-Thu', ''], dtype=object)
array(['Lin', 'C. D.', ''], dtype=object)]
|
5,728 |
hep-th/9701066
|
Nikita A. Nslavnov
|
Vladimir Korepin (ITP, SUNY at Stony Brook, USA) and Nikita Slavnov
(Steklov Mathematical Institute, Russia)
|
Time and Temperature Dependent Correlation Functions of 1D Models of
Quantum Statistical Mechanics
|
6 pages, LaTeX
| null |
10.1016/S0375-9601(97)00800-1
|
ITP-SB-97-5
|
hep-th cond-mat math.QA nlin.SI q-alg solv-int
| null |
We consider gapless models of statistical mechanics. At zero temperatures
correlation functions decay asymptotically as powers of distance in these
models. Temperature correlations decay exponentially. We used an example of
solvable model to find the formula, which describes long distance and large
time asymptotic of correlation function of local fields. The formula describes
correlation at any temperature and arbitrary coupling constant.
|
[{'version': 'v1', 'created': 'Tue, 14 Jan 1997 16:24:41 GMT'}]
|
2009-10-30
|
[array(['Korepin', 'Vladimir', '', 'ITP, SUNY at Stony Brook, USA'],
dtype=object)
array(['Slavnov', 'Nikita', '', 'Steklov Mathematical Institute, Russia'],
dtype=object) ]
|
5,729 |
2301.02549
|
Michael Lachner
|
Michael Lachner
|
Linear and non-linear machine learning attacks on physical unclonable
functions
|
77 pages, 23 figures, 4 tables, bachelor's thesis at Ludwig
Maximilian University of Munich (September 2021). Advisors: Steffen Illium,
Markus Friedrich, Prof. Dr. Dr. Ulrich R\"uhrmair, Supervisor: Prof. Dr.
Claudia Linnhoff-Popien
| null | null | null |
cs.CR
|
http://creativecommons.org/licenses/by/4.0/
|
In this thesis, several linear and non-linear machine learning attacks on
optical physical unclonable functions (PUFs) are presented. To this end, a
simulation of such a PUF is implemented to generate a variety of datasets that
differ in several factors in order to find the best simulation setup and to
study the behavior of the machine learning attacks under different
circumstances. All datasets are evaluated in terms of individual samples and
their correlations with each other. In the following, both linear and deep
learning approaches are used to attack these PUF simulations and
comprehensively investigate the impact of different factors on the datasets in
terms of their security level against attackers. In addition, the differences
between the two attack methods in terms of their performance are highlighted
using several independent metrics. Several improvements to these models and new
attacks will be introduced and investigated sequentially, with the goal of
progressively improving modeling performance. This will lead to the development
of an attack capable of almost perfectly predicting the outputs of the
simulated PUF. In addition, data from a real optical PUF is examined and both
compared to that of the simulation and used to see how the machine learning
models presented would perform in the real world. The results show that all
models meet the defined criterion for a successful machine learning attack.
|
[{'version': 'v1', 'created': 'Fri, 6 Jan 2023 14:57:25 GMT'}]
|
2023-01-09
|
[array(['Lachner', 'Michael', ''], dtype=object)]
|
5,730 |
0811.3834
|
Mahendiran R
|
A. Rebello and R. Mahendiran
|
Unusual field dependence of radio frequency magnetoimpedance in
La0.67Ba0.33MnO3
|
14 pages, 4 figures
| null |
10.1209/0295-5075/86/27004
| null |
cond-mat.mtrl-sci cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have investigated magnetic field dependence of the ac magnetoresitance and
the magnetoreactance in La0.67Ba0.33MnO3 over a wide frequency range from f = 0
to 30 MHz. A huge ac magnetoresistance of 55 % at f = 15 MHz in a small
magnetic field of H = 100 mT and magnetoreactance of 80 % at 2 MHz are
reported. We show distinct field dependence of the magnetoreactance and the
magnetoresistance with increasing frequency. It is shown that while the ac
magnetoresistance is negative and shows a single peak at the origin for all
frequencies except f = 30 MHz, the single peak in the magnetoreactance
transforms into a valley at the origin and simultaneously a double peak
develops . The position of the double peak increases in field with increasing
frequency. Eventually, the sign of the magnetoreactance changes from negative
to positive. Our results indicate possible occurrence of the ferromagneic
resonance in MHz range in unsaturated manganite.
|
[{'version': 'v1', 'created': 'Mon, 24 Nov 2008 10:17:56 GMT'}]
|
2015-05-13
|
[array(['Rebello', 'A.', ''], dtype=object)
array(['Mahendiran', 'R.', ''], dtype=object)]
|
5,731 |
nlin/0111004
|
E. Sh. Gutshabash
|
E.Sh.Gutshabash
|
Spiral-Logarithmic Structure in a Heisenberg Ferromagnet
|
LaTeX, 5 pages, no figures
|
JETP Letters, vol. 76, N6, p. 279, 2001
|
10.1134/1.1374260
| null |
nlin.SI cond-mat
| null |
Spiral-logarithmic structure is suggested as a stationary solution of a
modified equation for the Heisenberg model, and the single- and N-soliton
solutions are constructed on this base.
|
[{'version': 'v1', 'created': 'Fri, 2 Nov 2001 13:22:07 GMT'}]
|
2009-11-07
|
[array(['Gutshabash', 'E. Sh.', ''], dtype=object)]
|
5,732 |
2103.13666
|
Fetullah Atas
|
Fetullah Atas, Lars Grimstad, Grzegorz Cielniak
|
Evaluation of Sampling-Based Optimizing Planners for Outdoor Robot
Navigation
| null | null | null | null |
cs.RO
|
http://creativecommons.org/licenses/by/4.0/
|
Sampling-Based Optimal(SBO) path planning has been mainly used for robotic
arm manipulation tasks. Several research works have been carried out in order
to evaluate performances of various SBO planners for arm manipulation. However,
not much of work is available that highlights performances of SBO planners in
context of mobile robot navigation in outdoor 3D environments. This paper
evaluates performances of major SBO planners in Open Motion Planning
Library(OMPL) for that purpose. Due to large number of existing SBO planners,
experimenting and selecting a proper planner for a planning problem can be
burdensome and ambiguous. SBO planner's probabilistic nature can also add a
bias to this procedure. To address this, we evaluate performances of all
available SBO planners in OMPL with a randomized planning problem generation
method iteratively. Evaluations are done in various state spaces suiting for
different differential constraints of mobile robots. The planning setups are
focused for navigation of mobile robots in outdoor environments. The outdoor
environment representation is done with prebuilt OctoMaps, collision checks are
performed between a 3D box representing robot body and OctoMap for validation
of sampled states. Several evaluation metrics such as resulting path's length,
smoothness and status of acquired final solutions are selected. According to
selected metrics, performances from different SBO planners are presented
comparatively. Experimental results shows the significance of parallel
computing towards quicker convergence rates for optimal solutions. Several SBO
methods that takes advantage of parallel computing produced better results
consistently in all state spaces for different planning inquiries.
|
[{'version': 'v1', 'created': 'Thu, 25 Mar 2021 08:34:17 GMT'}]
|
2021-03-26
|
[array(['Atas', 'Fetullah', ''], dtype=object)
array(['Grimstad', 'Lars', ''], dtype=object)
array(['Cielniak', 'Grzegorz', ''], dtype=object)]
|
5,733 |
2210.08390
|
Rohan Chandra
|
Rohan Chandra, Rahul Maligi, Arya Anantula, Joydeep Biswas
|
SOCIALMAPF: Optimal and Efficient Multi-Agent Path Finding with
Strategic Agents for Social Navigation
|
Full paper submission to R-AL. Shorter Blue Sky paper version
available at AIHRI/2022/1016
| null | null | null |
cs.MA cs.AI cs.GT cs.RO
|
http://creativecommons.org/licenses/by/4.0/
|
We propose an extension to the MAPF formulation, called SocialMAPF, to
account for private incentives of agents in constrained environments such as
doorways, narrow hallways, and corridor intersections. SocialMAPF is able to,
for instance, accurately reason about the urgent incentive of an agent rushing
to the hospital over another agent's less urgent incentive of going to a
grocery store; MAPF ignores such agent-specific incentives. Our proposed
formulation addresses the open problem of optimal and efficient path planning
for agents with private incentives. To solve SocialMAPF, we propose a new class
of algorithms that use mechanism design during conflict resolution to
simultaneously optimize agents' private local utilities and the global system
objective. We perform an extensive array of experiments that show that optimal
search-based MAPF techniques lead to collisions and increased time-to-goal in
SocialMAPF compared to our proposed method using mechanism design. Furthermore,
we empirically demonstrate that mechanism design results in models that
maximizes agent utility and minimizes the overall time-to-goal of the entire
system. We further showcase the capabilities of mechanism design-based planning
by successfully deploying it in environments with static obstacles. To
conclude, we briefly list several research directions using the SocialMAPF
formulation, such as exploring motion planning in the continuous domain for
agents with private incentives.
|
[{'version': 'v1', 'created': 'Sat, 15 Oct 2022 22:49:26 GMT'}]
|
2022-10-18
|
[array(['Chandra', 'Rohan', ''], dtype=object)
array(['Maligi', 'Rahul', ''], dtype=object)
array(['Anantula', 'Arya', ''], dtype=object)
array(['Biswas', 'Joydeep', ''], dtype=object)]
|
5,734 |
1403.5060
|
Delfim F. M. Torres
|
Ricardo Almeida, Delfim F. M. Torres
|
A Discrete Method to Solve Fractional Optimal Control Problems
|
This is a preprint of a paper whose final and definite form is
published in [Nonlinear Dynam. 80 (2015), no. 4, 1811--1816]. A corrigendum,
written 19-Sept-2016, after publication of the paper, is given at the end
|
Nonlinear Dynam. 80 (2015), no. 4, 1811--1816
|
10.1007/s11071-014-1378-1
| null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a method to solve fractional optimal control problems, where the
dynamic depends on integer and Caputo fractional derivatives. Our approach
consists to approximate the initial fractional order problem with a new one
that involves integer derivatives only. The latter problem is then discretized,
by application of finite differences, and solved numerically. We illustrate the
effectiveness of the procedure with an example.
|
[{'version': 'v1', 'created': 'Thu, 20 Mar 2014 07:54:43 GMT'}
{'version': 'v2', 'created': 'Sun, 23 Oct 2016 22:08:21 GMT'}]
|
2016-10-25
|
[array(['Almeida', 'Ricardo', ''], dtype=object)
array(['Torres', 'Delfim F. M.', ''], dtype=object)]
|
5,735 |
1311.5047
|
Sebastian Wimmer
|
S. Wimmer, D. K\"odderitzsch, K. Chadova, and H. Ebert
|
Supplemental Material to "A first-principles linear response description
of the spin Nernst effect"
|
This is the Supplemental Material to "A first-principles linear
response description of the spin Nernst effect" arXiv:1306.0621
[cond-mat.mtrl-sci]
|
Phys. Rev. B 88, 201108(R) (2013)
|
10.1103/PhysRevB.88.201108
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A first-principles description of the spin Nernst effect, denoting the
occurrence of a transverse spin current due to a temperature gradient, is
presented. The approach, based on an extension to the Kubo-Streda equation for
spin transport, supplies in particular the formal basis for investigations of
diluted as well as concentrated alloys. Results for corresponding applications
to the alloy system Au-Cu give the intrinsic and extrinsic contributions to the
relevant transport coefficients. Using scaling laws allows in addition to split
the extrinsic contribution into its skew scattering and side-jump parts.
|
[{'version': 'v1', 'created': 'Wed, 20 Nov 2013 13:17:18 GMT'}]
|
2013-11-21
|
[array(['Wimmer', 'S.', ''], dtype=object)
array(['Ködderitzsch', 'D.', ''], dtype=object)
array(['Chadova', 'K.', ''], dtype=object)
array(['Ebert', 'H.', ''], dtype=object)]
|
5,736 |
1305.5863
|
Pierpaolo Esposito
|
Manuel del Pino, Pierpaolo Esposito, Pablo Figueroa, and Monica Musso
|
Non-topological condensates for the self-dual Chern-Simons-Higgs model
|
accepted on Comm. Pure Appl. Math
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For the abelian self-dual Chern-Simons-Higgs model we address existence
issues of periodic vortex configurations -- the so-called condensates-- of
non-topological type as $k \to 0$, where $k>0$ is the Chern-Simons parameter.
We provide a positive answer to the long-standing problem on the existence of
non-topological condensates with magnetic field concentrated at some of the
vortex points (as a sum of Dirac measures) as $k \to 0$, a question which is of
definite physical interest.
|
[{'version': 'v1', 'created': 'Fri, 24 May 2013 22:03:41 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Apr 2014 12:21:01 GMT'}
{'version': 'v3', 'created': 'Sat, 2 Aug 2014 11:18:20 GMT'}]
|
2014-08-05
|
[array(['del Pino', 'Manuel', ''], dtype=object)
array(['Esposito', 'Pierpaolo', ''], dtype=object)
array(['Figueroa', 'Pablo', ''], dtype=object)
array(['Musso', 'Monica', ''], dtype=object)]
|
5,737 |
astro-ph/9711119
|
Stacy McGaugh
|
Stacy McGaugh and Erwin de Blok
|
The Baryon Fraction Distribution and the Tully-Fisher Relation
|
3 pages latex, contribution to Santa Cruz workshop Galactic Halos
| null | null | null |
astro-ph
| null |
A number of observations strongly suggest that the baryon fraction is not a
universal constant. One obvious interpretation is that there is some
distribution of Fb, and the different observations sample different portions of
the distribution. However, the small intrinsic scatter in the Tully-Fisher
relation requires that the baryon fraction be very nearly universal. It is not
easy to resolve this paradox in the framework of the standard picture.
|
[{'version': 'v1', 'created': 'Tue, 11 Nov 1997 22:17:12 GMT'}]
|
2007-05-23
|
[array(['McGaugh', 'Stacy', ''], dtype=object)
array(['de Blok', 'Erwin', ''], dtype=object)]
|
5,738 |
1611.04603
|
Matthias Wilhelm
|
Isak Buhl-Mortensen, Marius de Leeuw, Asger C. Ipsen, Charlotte
Kristjansen, Matthias Wilhelm
|
A Quantum Check of AdS/dCFT
|
41 pages; v2: typos corrected, one comment added, matches published
version
|
JHEP 1701 (2017) 098
|
10.1007/JHEP01(2017)098
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We build the framework for performing loop computations in the defect version
of N=4 super Yang-Mills theory which is dual to the probe D5-D3 brane system
with background gauge-field flux. In this dCFT, a codimension-one defect
separates two regions of space-time with different ranks of the gauge group and
three of the scalar fields acquire non-vanishing and space-time-dependent
vacuum expectation values. The latter leads to a highly non-trivial mass mixing
problem between different colour and flavour components, which we solve using
fuzzy-sphere coordinates. Furthermore, the resulting space-time dependence of
the theory's Minkowski space propagators is handled by reformulating these as
propagators in an effective AdS4. Subsequently, we initiate the computation of
quantum corrections. The one-loop correction to the one-point function of any
local gauge-invariant scalar operator is shown to receive contributions from
only two Feynman diagrams. We regulate these diagrams using dimensional
reduction, finding that one of the two diagrams vanishes, and discuss the
procedure for calculating the one-point function of a generic operator from the
SU(2) subsector. Finally, we explicitly evaluate the one-loop correction to the
one-point function of the BPS vacuum state, finding perfect agreement with an
earlier string-theory prediction. This constitutes a highly non-trivial test of
the gauge-gravity duality in a situation where both supersymmetry and conformal
symmetry are partially broken.
|
[{'version': 'v1', 'created': 'Mon, 14 Nov 2016 21:00:03 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Feb 2017 19:09:11 GMT'}]
|
2017-02-06
|
[array(['Buhl-Mortensen', 'Isak', ''], dtype=object)
array(['de Leeuw', 'Marius', ''], dtype=object)
array(['Ipsen', 'Asger C.', ''], dtype=object)
array(['Kristjansen', 'Charlotte', ''], dtype=object)
array(['Wilhelm', 'Matthias', ''], dtype=object)]
|
5,739 |
2302.00763
|
Ishita Dasgupta
|
Ishita Dasgupta, Christine Kaeser-Chen, Kenneth Marino, Arun Ahuja,
Sheila Babayan, Felix Hill, Rob Fergus
|
Collaborating with language models for embodied reasoning
|
Presented at NeurIPS 2022 Language and Reinforcement Learning
Workshop (best paper) and NeurIPS 2022 Foundation Models for Decision Making
Workshop. 4 pages main; 14 pages total (including references and appendix); 3
figures
| null | null | null |
cs.LG cs.AI cs.CL
|
http://creativecommons.org/licenses/by/4.0/
|
Reasoning in a complex and ambiguous environment is a key goal for
Reinforcement Learning (RL) agents. While some sophisticated RL agents can
successfully solve difficult tasks, they require a large amount of training
data and often struggle to generalize to new unseen environments and new tasks.
On the other hand, Large Scale Language Models (LSLMs) have exhibited strong
reasoning ability and the ability to to adapt to new tasks through in-context
learning. However, LSLMs do not inherently have the ability to interrogate or
intervene on the environment. In this work, we investigate how to combine these
complementary abilities in a single system consisting of three parts: a
Planner, an Actor, and a Reporter. The Planner is a pre-trained language model
that can issue commands to a simple embodied agent (the Actor), while the
Reporter communicates with the Planner to inform its next command. We present a
set of tasks that require reasoning, test this system's ability to generalize
zero-shot and investigate failure cases, and demonstrate how components of this
system can be trained with reinforcement-learning to improve performance.
|
[{'version': 'v1', 'created': 'Wed, 1 Feb 2023 21:26:32 GMT'}]
|
2023-02-03
|
[array(['Dasgupta', 'Ishita', ''], dtype=object)
array(['Kaeser-Chen', 'Christine', ''], dtype=object)
array(['Marino', 'Kenneth', ''], dtype=object)
array(['Ahuja', 'Arun', ''], dtype=object)
array(['Babayan', 'Sheila', ''], dtype=object)
array(['Hill', 'Felix', ''], dtype=object)
array(['Fergus', 'Rob', ''], dtype=object)]
|
5,740 |
cond-mat/0411106
|
Brian Jackson
|
M. Cozzini, A. L. Fetter, B. Jackson, and S. Stringari
|
Oscillations of a Bose-Einstein condensate rotating in a harmonic plus
quartic trap
|
4 pages, 2 figures
| null |
10.1103/PhysRevLett.94.100402
| null |
cond-mat.stat-mech
| null |
We study the normal modes of a two-dimensional rotating Bose-Einstein
condensate confined in a quadratic plus quartic trap. Hydrodynamic theory and
sum rules are used to derive analytical predictions for the collective
frequencies in the limit of high angular velocities, $\Omega$, where the vortex
lattice produced by the rotation exhibits an annular structure. We predict a
class of excitations with frequency $\sqrt{6} \Omega$ in the rotating frame,
irrespective of the mode multipolarity $m$, as well as a class of low energy
modes with frequency proportional to $|m|/\Omega$. The predictions are in good
agreement with results of numerical simulations based on the 2D
Gross-Pitaevskii equation. The same analysis is also carried out at even higher
angular velocities, where the system enters the giant vortex regime.
|
[{'version': 'v1', 'created': 'Thu, 4 Nov 2004 13:44:48 GMT'}]
|
2009-11-10
|
[array(['Cozzini', 'M.', ''], dtype=object)
array(['Fetter', 'A. L.', ''], dtype=object)
array(['Jackson', 'B.', ''], dtype=object)
array(['Stringari', 'S.', ''], dtype=object)]
|
5,741 |
1903.05206
|
William Wolf
|
Hugo F. S. Lui and William R. Wolf
|
Construction of Reduced Order Models for Fluid Flows Using Deep
Feedforward Neural Networks
| null | null |
10.1017/jfm.2019.358
| null |
physics.flu-dyn physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a numerical methodology for construction of reduced order models,
ROMs, of fluid flows through the combination of flow modal decomposition and
regression analysis. Spectral proper orthogonal decomposition, SPOD, is applied
to reduce the dimensionality of the model and, at the same time, filter the POD
temporal modes. The regression step is performed by a deep feedforward neural
network, DNN, and the current framework is implemented in a context similar to
the sparse identification of non-linear dynamics algorithm, SINDy. A discussion
on the optimization of the DNN hyperparameters is provided for obtaining the
best ROMs and an assessment of these models is presented for a canonical
nonlinear oscillator and the compressible flow past a cylinder. Then, the
method is tested on the reconstruction of a turbulent flow computed by a large
eddy simulation of a plunging airfoil under dynamic stall. The reduced order
model is able to capture the dynamics of the leading edge stall vortex and the
subsequent trailing edge vortex. For the cases analyzed, the numerical
framework allows the prediction of the flowfield beyond the training window
using larger time increments than those employed by the full order model. We
also demonstrate the robustness of the current ROMs constructed via deep
feedforward neural networks through a comparison with sparse regression. The
DNN approach is able to learn transient features of the flow and presents more
accurate and stable long-term predictions compared to sparse regression.
|
[{'version': 'v1', 'created': 'Tue, 12 Mar 2019 20:51:14 GMT'}]
|
2019-07-24
|
[array(['Lui', 'Hugo F. S.', ''], dtype=object)
array(['Wolf', 'William R.', ''], dtype=object)]
|
5,742 |
2112.04587
|
Paulina Wolkenberg
|
Paulina Wolkenberg and Diego Turrini
|
Effect of clouds on emission spectra for Super Venus
|
20 pages, 3 figures
| null |
10.1007/s10509-021-04019-0
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report a model study on the effects of clouds on emission spectra of
super-Venus planets. Our goal is to assess possible ways to identify
characteristic spectral features due to clouds. We show that it is possible to
distinguish an impact of H2SO4 clouds on the CO2 absorption band at 4.8 micron
for temperature profiles with and without a thermal inversion. The thermal
inversion can help to distinguish the signal from high altitude clouds (85 km,
~1 mbar). Featureless emission spectra are found for high altitude clouds (85
km, ~1 mbar) with temperature profile without thermal inversion. More spectral
features appear in the emission spectra with decreasing cloud top altitudes.
The compactness of clouds has an inverse effect on emission spectra than cloud
top altitudes. Small cloud scale heights reduce the signal and the CO2
absorption bands become flat.
|
[{'version': 'v1', 'created': 'Wed, 8 Dec 2021 20:43:34 GMT'}]
|
2022-02-09
|
[array(['Wolkenberg', 'Paulina', ''], dtype=object)
array(['Turrini', 'Diego', ''], dtype=object)]
|
5,743 |
2208.11349
|
Zijian Gao
|
Zijian Gao, Kele Xu, YiYing Li, Yuanzhao Zhai, Dawei Feng, Bo Ding,
XinJun Mao, Huaimin Wang
|
Dynamic Memory-based Curiosity: A Bootstrap Approach for Exploration
| null | null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The sparsity of extrinsic rewards poses a serious challenge for reinforcement
learning (RL). Currently, many efforts have been made on curiosity which can
provide a representative intrinsic reward for effective exploration. However,
the challenge is still far from being solved. In this paper, we present a novel
curiosity for RL, named DyMeCu, which stands for Dynamic Memory-based
Curiosity. Inspired by human curiosity and information theory, DyMeCu consists
of a dynamic memory and dual online learners. The curiosity arouses if
memorized information can not deal with the current state, and the information
gap between dual learners can be formulated as the intrinsic reward for agents,
and then such state information can be consolidated into the dynamic memory.
Compared with previous curiosity methods, DyMeCu can better mimic human
curiosity with dynamic memory, and the memory module can be dynamically grown
based on a bootstrap paradigm with dual learners. On multiple benchmarks
including DeepMind Control Suite and Atari Suite, large-scale empirical
experiments are conducted and the results demonstrate that DyMeCu outperforms
competitive curiosity-based methods with or without extrinsic rewards. We will
release the code to enhance reproducibility.
|
[{'version': 'v1', 'created': 'Wed, 24 Aug 2022 07:56:12 GMT'}]
|
2022-08-25
|
[array(['Gao', 'Zijian', ''], dtype=object)
array(['Xu', 'Kele', ''], dtype=object)
array(['Li', 'YiYing', ''], dtype=object)
array(['Zhai', 'Yuanzhao', ''], dtype=object)
array(['Feng', 'Dawei', ''], dtype=object)
array(['Ding', 'Bo', ''], dtype=object)
array(['Mao', 'XinJun', ''], dtype=object)
array(['Wang', 'Huaimin', ''], dtype=object)]
|
5,744 |
2205.13967
|
S\'ergio S. Rodrigues
|
S\'ergio S. Rodrigues and Dagmawi A. Seifu
|
Feedback semiglobal stabilization to trajectories for the
Kuramoto-Sivashinsky equation
|
18 subfigures
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is shown that an oblique projection based feedback control is able to
stabilize the state of the Kuramoto-Sivashinsky equation, evolving in
rectangular domains, to a given time-dependent trajectory. The number of
actuators is finite and consists of a finite number of indicator functions
supported in small subdomains. Simulations are presented, in the
one-dimensional case, showing the stabilizing performance of the feedback
control.
|
[{'version': 'v1', 'created': 'Fri, 27 May 2022 13:32:46 GMT'}]
|
2022-05-30
|
[array(['Rodrigues', 'Sérgio S.', ''], dtype=object)
array(['Seifu', 'Dagmawi A.', ''], dtype=object)]
|
5,745 |
1009.4218
|
Katherine Vieira
|
Katherine Vieira, Terrence Girard, William van Altena, Norbert
Zacharias, Dana Casetti-Dinescu, Vladimir Korchagin, Imants Platais, David
Monet and Carlos Lopez
|
Proper Motion Study of the Magellanic Clouds using SPM material
|
50 pages (referee format), 13 figures. Accepted for publication in AJ
| null |
10.1088/0004-6256/140/6/1934
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Absolute proper motions are determined for stars and galaxies to V=17.5 over
a 450 square-degree area that encloses both Magellanic Clouds. The proper
motions are based on photographic and CCD observations of the Yale/San Juan
Southern Proper Motion program, which span over a baseline of 40 years.
Multiple, local relative proper motion measures are combined in an overlap
solution using photometrically selected Galactic Disk stars to define a global
relative system that is then transformed to absolute using external galaxies
and Hipparcos stars to tie into the ICRS. The resulting catalog of 1.4 million
objects is used to derive the mean absolute proper motions of the Large
Magellanic Cloud and the Small Magellanic Cloud;
$(\mu_\alpha\cos\delta,\mu_\delta)_{LMC}=(1.89,+0.39)\pm (0.27,0.27)\;\;\{mas
yr}^{-1}$ and $(\mu_\alpha\cos\delta,\mu_\delta)_{SMC}=(0.98,-1.01)\pm
(0.30,0.29)\;\;\{mas yr}^{-1}$. These mean motions are based on best-measured
samples of 3822 LMC stars and 964 SMC stars. A dominant portion (0.25 mas
yr$^{-1}$) of the formal errors is due to the estimated uncertainty in the
inertial system of the Hipparcos Catalog stars used to anchor the bright end of
our proper motion measures. A more precise determination can be made for the
proper motion of the SMC {\it relative} to the LMC;
$(\mu_{\alpha\cos\delta},\mu_\delta)_{SMC-LMC} = (-0.91,-1.49) \pm
(0.16,0.15)\;\;\{mas yr}^{-1}$. This differential value is combined with
measurements of the proper motion of the LMC taken from the literature to
produce new absolute proper-motion determinations for the SMC, as well as an
estimate of the total velocity difference of the two clouds to within $\pm$54
kms$^{-1}$.
|
[{'version': 'v1', 'created': 'Tue, 21 Sep 2010 21:08:52 GMT'}]
|
2015-05-20
|
[array(['Vieira', 'Katherine', ''], dtype=object)
array(['Girard', 'Terrence', ''], dtype=object)
array(['van Altena', 'William', ''], dtype=object)
array(['Zacharias', 'Norbert', ''], dtype=object)
array(['Casetti-Dinescu', 'Dana', ''], dtype=object)
array(['Korchagin', 'Vladimir', ''], dtype=object)
array(['Platais', 'Imants', ''], dtype=object)
array(['Monet', 'David', ''], dtype=object)
array(['Lopez', 'Carlos', ''], dtype=object)]
|
5,746 |
2108.13452
|
Wasutep Luangtip
|
W. Luangtip (1 and 2), P. Chainakun (3), S. Loekkesee (1), C. Deesamer
(3), T. Ngonsamrong (3) and T. Sintusiri (3) ((1) Srinakharinwirot
University, (2) National Astronomical Research Institute of Thailand, (3)
Suranaree University of Technology)
|
X-ray reverberation models of the disc wind in ultraluminous X-ray
source NGC 5408 X-1
|
14 pages, 7 figures, 4 tables, accepted for publication in MNRAS
| null |
10.1093/mnras/stab2494
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Majority of ultraluminous X-ray sources (ULXs) are believed to be
super-Eddington objects, providing a nearby prototype for studying an accretion
in super-critical regime. In this work, we present the study of time-lag
spectra of the ULX NGC 5408 X-1 using a reverberation mapping technique. The
time-lag data were binned using two different methods: time averaged-based and
luminosity-based spectral bins. These spectra were fitted using two proposed
geometric models: single and multiple photon scattering models. While both
models similarly assume that a fraction of hard photons emitted from inner
accretion disc could be down-scattered with the super-Eddington outflowing wind
becoming lagged, soft photons, they are different by the number that the hard
photons scattering with the wind: i.e. single vs multiple times. In case of
averaged spectrum, both models consistently constrained the mass of ULX in the
range of $\sim$80-500 M$_{\rm \odot}$. However, for the modelling results from
the luminosity based spectra, the confidence interval of the BH mass is
significantly improved and is constrained to the range of $\sim$75-90 M$_{\rm
\odot}$. In addition, the models suggest that the wind geometry is extended in
which the photons could down-scatter with the wind at the distance of
$\sim$10$^{4}$ - 10$^{6}$ $r_{\rm g}$. The results also suggest the variability
of the lag spectra as a function of ULX luminosity, but the clear trend of
changing accretion disc geometry with the spectral variability is not observed.
|
[{'version': 'v1', 'created': 'Mon, 30 Aug 2021 18:07:27 GMT'}]
|
2021-09-15
|
[array(['Luangtip', 'W.', '', '1 and 2'], dtype=object)
array(['Chainakun', 'P.', ''], dtype=object)
array(['Loekkesee', 'S.', ''], dtype=object)
array(['Deesamer', 'C.', ''], dtype=object)
array(['Ngonsamrong', 'T.', ''], dtype=object)
array(['Sintusiri', 'T.', ''], dtype=object)]
|
5,747 |
2105.09755
|
Julie Delon
|
Julie Delon, Natha\"el Gozlan, Alexandre Saint-Dizier
|
Generalized Wasserstein barycenters between probability measures living
on different subspaces
| null | null | null | null |
math.PR math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce a generalization of the Wasserstein barycenter,
to a case where the initial probability measures live on different subspaces of
R^d. We study the existence and uniqueness of this barycenter, we show how it
is related to a larger multi-marginal optimal transport problem, and we propose
a dual formulation. Finally, we explain how to compute numerically this
generalized barycenter on discrete distributions, and we propose an explicit
solution for Gaussian distributions.
|
[{'version': 'v1', 'created': 'Thu, 20 May 2021 14:01:51 GMT'}]
|
2021-05-21
|
[array(['Delon', 'Julie', ''], dtype=object)
array(['Gozlan', 'Nathaël', ''], dtype=object)
array(['Saint-Dizier', 'Alexandre', ''], dtype=object)]
|
5,748 |
2104.00128
|
Tongou Yang
|
Jianhui Li and Tongou Yang
|
Decoupling for mixed-homogeneous polynomials in $\mathbb R^3$
|
27 pages and 3 figures; to appear in Mathematische Annalen
|
Mathematische Annalen, 2021
|
10.1007/s00208-021-02273-9
| null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove decoupling inequalities for mixed-homogeneous bivariate polynomials,
which partially answers a conjecture of Bourgain, Demeter and Kemp.
|
[{'version': 'v1', 'created': 'Wed, 31 Mar 2021 21:42:15 GMT'}
{'version': 'v2', 'created': 'Fri, 17 Sep 2021 21:32:04 GMT'}]
|
2021-10-05
|
[array(['Li', 'Jianhui', ''], dtype=object)
array(['Yang', 'Tongou', ''], dtype=object)]
|
5,749 |
2102.02209
|
Stevan Nadj-Perge
|
Youngjoon Choi, Hyunjin Kim, Cyprian Lewandowski, Yang Peng, Alex
Thomson, Robert Polski, Yiran Zhang, Kenji Watanabe, Takashi Taniguchi, Jason
Alicea, Stevan Nadj-Perge
|
Interaction-driven Band Flattening and Correlated Phases in Twisted
Bilayer Graphene
|
14 pages, 4 figures, main text
| null | null | null |
cond-mat.str-el cond-mat.mes-hall cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Flat electronic bands, characteristic of magic-angle twisted bilayer graphene
(TBG), host a wealth of correlated phenomena. Early theoretical considerations
suggested that, at the magic angle, the Dirac velocity vanishes and the entire
width of the moir\'e bands becomes extremely narrow. Yet, this scenario
contradicts experimental studies that reveal a finite Dirac velocity as well as
bandwidths significantly larger than predicted. Here we use spatially resolved
spectroscopy in finite and zero magnetic fields to examine the electronic
structure of moir\'e bands and their intricate connection to correlated phases.
By following the relative shifts of Landau levels in finite fields, we detect
filling-dependent band flattening, that unexpectedly starts already at ~1.3
degrees, well above the magic angle and hence nominally in the weakly
correlated regime. We further show that, as the twist angle is reduced, the
moir\'e bands become maximally flat at progressively lower doping levels.
Surprisingly, when the twist angles reach values for which the maximal
flattening occurs at approximate filling of $-2$, $+1$,$+2$,$+3$ electrons per
moir\'e unit cell, the corresponding zero-field correlated phases start to
emerge. Our observations are corroborated by calculations that incorporate an
interplay between the Coulomb charging energy and exchange interactions;
together these effects produce band flattening and hence a significant
density-of-states enhancement that facilitates the observed symmetry-breaking
cascade transitions. Besides emerging phases pinned to integer fillings, we
also experimentally identify a series of pronounced correlation-driven band
deformations and soft gaps in a wider doping range around $\pm 2$ filling where
superconductivity is expected. Our results highlight the role of
interaction-driven band-flattening in forming robust correlated phases in TBG.
|
[{'version': 'v1', 'created': 'Wed, 3 Feb 2021 19:00:00 GMT'}]
|
2021-02-05
|
[array(['Choi', 'Youngjoon', ''], dtype=object)
array(['Kim', 'Hyunjin', ''], dtype=object)
array(['Lewandowski', 'Cyprian', ''], dtype=object)
array(['Peng', 'Yang', ''], dtype=object)
array(['Thomson', 'Alex', ''], dtype=object)
array(['Polski', 'Robert', ''], dtype=object)
array(['Zhang', 'Yiran', ''], dtype=object)
array(['Watanabe', 'Kenji', ''], dtype=object)
array(['Taniguchi', 'Takashi', ''], dtype=object)
array(['Alicea', 'Jason', ''], dtype=object)
array(['Nadj-Perge', 'Stevan', ''], dtype=object)]
|
5,750 |
1301.4400
|
Mathias Diez
|
M. Diez, I. C. Fulga, D. I. Pikulin, M. Wimmer, A. R. Akhmerov, C. W.
J. Beenakker
|
Phase-locked magnetoconductance oscillations as a probe of Majorana edge
states
|
10 pages, 6 figures. New appendix on the gauge invariant
discretization of the Bogoliubov-De Gennes equation. Accepted for publication
in PRB
|
Phys. Rev. B 87, 125406 (2013)
|
10.1103/PhysRevB.87.125406
| null |
cond-mat.mes-hall cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate the Andreev conductance of a superconducting ring interrupted by
a flux-biased Josephson junction, searching for electrical signatures of
circulating edge states. Two-dimensional pair potentials of spin-singlet d-wave
and spin-triplet p-wave symmetry support, respectively, (chiral) Dirac modes
and (chiral or helical) Majorana modes. These produce h/e-periodic
magnetoconductance oscillations of amplitude \simeq (e^{2}/h)N^{-1/2}, measured
via an N-mode point contact at the inner or outer perimeter of the grounded
ring. For Dirac modes the oscillations in the two contacts are independent,
while for an unpaired Majorana mode they are phase locked by a topological
phase transition at the Josephson junction.
|
[{'version': 'v1', 'created': 'Fri, 18 Jan 2013 15:10:45 GMT'}
{'version': 'v2', 'created': 'Tue, 26 Feb 2013 10:33:35 GMT'}]
|
2013-03-08
|
[array(['Diez', 'M.', ''], dtype=object)
array(['Fulga', 'I. C.', ''], dtype=object)
array(['Pikulin', 'D. I.', ''], dtype=object)
array(['Wimmer', 'M.', ''], dtype=object)
array(['Akhmerov', 'A. R.', ''], dtype=object)
array(['Beenakker', 'C. W. J.', ''], dtype=object)]
|
5,751 |
1708.08872
|
Eric Bertin
|
Giacomo Gradenigo, Eric Bertin
|
Participation ratio for constraint-driven condensation with
superextensive mass
|
11 pages, 2 figures, to appear in Entropy
|
Entropy 19, 517 (2017)
|
10.3390/e19100517
| null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Broadly distributed random variables with a power-law distribution $f(m) \sim
m^{-(1+\alpha)}$ are known to generate condensation effects, in the sense that,
when the exponent $\alpha$ lies in a certain interval, the largest variable in
a sum of $N$ (independent and identically distributed) terms is for large $N$
of the same order as the sum itself. In particular, when the distribution has
infinite mean ($0<\alpha<1$) one finds unconstrained condensation, whereas for
$\alpha>1$ constrained condensation takes places fixing the total mass to a
large enough value $M=\sum_{i=1}^N m_i > M_c$. In both cases, a standard
indicator of the condensation phenomenon is the participation ratio
$Y_k=\langle \sum_i m_i^k / (\sum_i m_i)^k\rangle$ ($k>1$), which takes a
finite value for $N \to \infty$ when condensation occurs. To better understand
the connection between constrained and unconstrained condensation, we study
here the situation when the total mass is fixed to a superextensive value $M
\sim N^{1+\delta}$ ($\delta >0$), hence interpolating between the unconstrained
condensation case (where the typical value of the total mass scales as $M\sim
N^{1/\alpha}$ for $\alpha<1$) and the extensive constrained mass. In particular
we show that for exponents $\alpha<1$ a condensate phase for values $\delta >
\delta_c=1/\alpha-1$ is separated from a homogeneous phase at $\delta <
\delta_c$ by a transition line, $\delta=\delta_c$, where a weak condensation
phenomenon takes place. We focus on the evaluation of the participation ratio
as a generic indicator of condensation, also recalling or presenting results in
the standard cases of unconstrained mass and of fixed extensive mass.
|
[{'version': 'v1', 'created': 'Tue, 29 Aug 2017 16:54:00 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Sep 2017 08:42:44 GMT'}]
|
2017-11-22
|
[array(['Gradenigo', 'Giacomo', ''], dtype=object)
array(['Bertin', 'Eric', ''], dtype=object)]
|
5,752 |
2209.10656
|
Xiangtong Yao
|
Xiangtong Yao, Zhenshan Bing, Genghang Zhuang, Kejia Chen, Hongkuan
Zhou, Kai Huang and Alois Knoll
|
Learning from Symmetry: Meta-Reinforcement Learning with Symmetrical
Behaviors and Language Instructions
| null | null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Meta-reinforcement learning (meta-RL) is a promising approach that enables
the agent to learn new tasks quickly. However, most meta-RL algorithms show
poor generalization in multi-task scenarios due to the insufficient task
information provided only by rewards. Language-conditioned meta-RL improves the
generalization capability by matching language instructions with the agent's
behaviors. While both behaviors and language instructions have symmetry, which
can speed up human learning of new knowledge. Thus, combining symmetry and
language instructions into meta-RL can help improve the algorithm's
generalization and learning efficiency. We propose a dual-MDP
meta-reinforcement learning method that enables learning new tasks efficiently
with symmetrical behaviors and language instructions. We evaluate our method in
multiple challenging manipulation tasks, and experimental results show that our
method can greatly improve the generalization and learning efficiency of
meta-reinforcement learning. Videos are available at
https://tumi6robot.wixsite.com/symmetry/.
|
[{'version': 'v1', 'created': 'Wed, 21 Sep 2022 20:54:21 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Jul 2023 11:50:29 GMT'}]
|
2023-07-06
|
[array(['Yao', 'Xiangtong', ''], dtype=object)
array(['Bing', 'Zhenshan', ''], dtype=object)
array(['Zhuang', 'Genghang', ''], dtype=object)
array(['Chen', 'Kejia', ''], dtype=object)
array(['Zhou', 'Hongkuan', ''], dtype=object)
array(['Huang', 'Kai', ''], dtype=object)
array(['Knoll', 'Alois', ''], dtype=object)]
|
5,753 |
1201.4367
|
Derrick Stolee
|
Derrick Stolee
|
Automorphism Groups and Adversarial Vertex Deletions
|
5 pages
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Any finite group can be encoded as the automorphism group of an unlabeled
simple graph. Recently Hartke, Kolb, Nishikawa, and Stolee (2010) demonstrated
a construction that allows any ordered pair of finite groups to be represented
as the automorphism group of a graph and a vertex-deleted subgraph. In this
note, we describe a generalized scenario as a game between a player and an
adversary: An adversary provides a list of finite groups and a number of
rounds. The player constructs a graph with automorphism group isomorphic to the
first group. In the following rounds, the adversary selects a group and the
player deletes a vertex such that the automorphism group of the corresponding
vertex-deleted subgraph is isomorphic to the selected group. We provide a
construction that allows the player to appropriately respond to any sequence of
challenges from the adversary.
|
[{'version': 'v1', 'created': 'Fri, 20 Jan 2012 19:01:16 GMT'}
{'version': 'v2', 'created': 'Wed, 27 Jun 2012 21:24:49 GMT'}]
|
2012-06-29
|
[array(['Stolee', 'Derrick', ''], dtype=object)]
|
5,754 |
2106.14167
|
Romina Etezadi
|
Romina Etezadi, Mehrnoush Shamsfard
|
PeCoQ: A Dataset for Persian Complex Question Answering over Knowledge
Graph
|
5 pages, 4 figures
| null |
10.1109/IKT51791.2020.9345610
| null |
cs.CL cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Question answering systems may find the answers to users' questions from
either unstructured texts or structured data such as knowledge graphs.
Answering questions using supervised learning approaches including deep
learning models need large training datasets. In recent years, some datasets
have been presented for the task of Question answering over knowledge graphs,
which is the focus of this paper. Although many datasets in English were
proposed, there have been a few question-answering datasets in Persian. This
paper introduces \textit{PeCoQ}, a dataset for Persian question answering. This
dataset contains 10,000 complex questions and answers extracted from the
Persian knowledge graph, FarsBase. For each question, the SPARQL query and two
paraphrases that were written by linguists are provided as well. There are
different types of complexities in the dataset, such as multi-relation,
multi-entity, ordinal, and temporal constraints. In this paper, we discuss the
dataset's characteristics and describe our methodology for building it.
|
[{'version': 'v1', 'created': 'Sun, 27 Jun 2021 08:21:23 GMT'}]
|
2021-06-29
|
[array(['Etezadi', 'Romina', ''], dtype=object)
array(['Shamsfard', 'Mehrnoush', ''], dtype=object)]
|
5,755 |
0806.3281
|
Nicholas J. Kuhn
|
Nicholas J. Kuhn
|
Topological nonrealization results via the Goodwillie tower approach to
iterated loopspace homology
|
18 pages
|
Algebr. Geom. Topol. 8 (2008) 2109-2129
|
10.2140/agt.2008.8.2109
| null |
math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a strengthened version of a theorem of Lionel Schwartz that says
that certain modules over the Steenrod algebra cannot be the mod 2 cohomology
of a space.
What is most interesting is our method, which replaces his iterated use of
the Eilenberg--Moore spectral sequence by a single use of the spectral sequence
converging to the mod 2 cohomology of Omega^nX obtained from the Goodwillie
tower for the suspension spectrum of Omega^nX. Much of the paper develops basic
properties of this spectral sequence.
|
[{'version': 'v1', 'created': 'Thu, 19 Jun 2008 20:47:06 GMT'}]
|
2014-10-01
|
[array(['Kuhn', 'Nicholas J.', ''], dtype=object)]
|
5,756 |
1608.08660
|
Jose Yallouz
|
Jose Yallouz and Ariel Orda
|
Tunable QoS-Aware Network Survivability
| null | null | null | null |
cs.NI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Coping with network failures has been recognized as an issue of major
importance in terms of social security, stability and prosperity. It has become
clear that current networking standards fall short of coping with the complex
challenge of surviving failures. The need to address this challenge has become
a focal point of networking research. In particular, the concept of
\textbf{\emph{tunable survivability}} offers major performance improvements
over traditional approaches. Indeed, while the traditional approach aims at
providing full (100\%) protection against network failures through disjoint
paths, it was realized that this requirement is too restrictive in practice.
Tunable survivability provides a quantitative measure for specifying the
desired level (0\%-100\%) of survivability and offers flexibility in the choice
of the routing paths. Previous work focused on the simpler class of
"bottleneck" criteria, such as bandwidth. In this study, we focus on the
important and much more complex class of \emph{additive} criteria, such as
delay and cost. First, we establish some (in part, counter-intuitive)
properties of the optimal solution. Then, we establish efficient algorithmic
schemes for optimizing the level of survivability under additive end-to-end QoS
bounds. Subsequently, through extensive simulations, we show that, at the price
of \emph{negligible} reduction in the level of survivability, a major
improvement (up to a factor of $2$) is obtained in terms of end-to-end QoS
performance. Finally, we exploit the above findings in the context of a network
design problem, in which, for a given investment budget, we aim to improve the
survivability of the network links.
|
[{'version': 'v1', 'created': 'Tue, 30 Aug 2016 21:23:54 GMT'}]
|
2016-09-01
|
[array(['Yallouz', 'Jose', ''], dtype=object)
array(['Orda', 'Ariel', ''], dtype=object)]
|
5,757 |
hep-th/0008186
|
Sanjaye Ramgoolam
|
Antal Jevicki, Mihail Mihailescu, Sanjaye Ramgoolam
|
Hidden classical symmetry in quantum spaces at roots of unity : From
q-sphere to fuzzy sphere
|
19 pages in harvmac big, 5 figures; v2: refs added ; v3: more refs
added
| null | null |
Brown-Het-1229
|
hep-th math.QA
| null |
We study relations between different kinds of non-commutative spheres which
have appeared in the context of ADS/CFT correspondences recently, emphasizing
the connections between spaces that have manifest quantum group symmetry and
spaces that have manifest classical symmetry. In particular we consider the
quotient $SU_q(2)/U(1)$ at roots of unity, and find its relations with the
fuzzy sphere with manifest classical SU(2) symmetry. Deformation maps between
classical and quantum symmetry, the $U_q(SU(2))$ module structure of quantum
spheres and the structure of indecomposable representations of $U_q(SU(2))$ at
roots of unity conspire in an interesting way to allow the relation between
manifestly $U_q(SU(2)$ symmetric spheres and manifestly U(SU(2)) symmetric
spheres. The relation suggests that a subset of field theory actions on the
q-sphere are equivalent to actions on the fuzzy sphere. The results here are
compatible with the proposal that quantum spheres at roots of unity appear as
effective geometries which account for finite N effects in the ADS/CFT
correspondence.
|
[{'version': 'v1', 'created': 'Wed, 23 Aug 2000 21:34:48 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Sep 2000 03:07:32 GMT'}
{'version': 'v3', 'created': 'Sun, 10 Dec 2000 05:24:13 GMT'}]
|
2007-05-23
|
[array(['Jevicki', 'Antal', ''], dtype=object)
array(['Mihailescu', 'Mihail', ''], dtype=object)
array(['Ramgoolam', 'Sanjaye', ''], dtype=object)]
|
5,758 |
2111.04511
|
Takahiro Terada
|
Shuntaro Aoki and Takahiro Terada
|
Constrained Superfields in Dynamical Background
|
34 pages; published version
|
JHEP 02 (2022) 177
|
10.1007/JHEP02(2022)177
|
CTPU-PTC-21-38
|
hep-th astro-ph.CO hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the nonlinear realization of supersymmetry in a
dynamical/cosmological background in which derivative terms like kinetic terms
are finite. Starting from linearly realized theories, we integrate out heavy
modes without neglecting derivative terms to obtain algebraic constraints on
superfields. Thanks to the supersymmetry breaking contribution by the kinetic
energy, the validity of constrained superfields can be extended to cosmological
regimes and phenomena such as reheating after inflation, kinetic-energy
domination, and the kinetic and standard misalignment of axion.
|
[{'version': 'v1', 'created': 'Mon, 8 Nov 2021 13:51:37 GMT'}
{'version': 'v2', 'created': 'Mon, 21 Feb 2022 14:49:06 GMT'}]
|
2022-02-24
|
[array(['Aoki', 'Shuntaro', ''], dtype=object)
array(['Terada', 'Takahiro', ''], dtype=object)]
|
5,759 |
1708.09355
|
Dax Enshan Koh
|
Dax Enshan Koh, Murphy Yuezhen Niu, Theodore J. Yoder
|
Quantum simulation from the bottom up: the case of rebits
|
61 pages, 5 figures
|
J. Phys. A: Math. Theor. 51 (2018) 195302
|
10.1088/1751-8121/aab9c4
| null |
quant-ph cs.CC math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Typically, quantum mechanics is thought of as a linear theory with unitary
evolution governed by the Schr\"odinger equation. While this is technically
true and useful for a physicist, with regards to computation it is an
unfortunately narrow point of view. Just as a classical computer can simulate
highly nonlinear functions of classical states, so too can the more general
quantum computer simulate nonlinear evolutions of quantum states. We detail one
particular simulation of nonlinearity on a quantum computer, showing how the
entire class of $\mathbb{R}$-unitary evolutions (on $n$ qubits) can be
simulated using a unitary, real-amplitude quantum computer (consisting of $n+1$
qubits in total). These operators can be represented as the sum of a linear and
antilinear operator, and add an intriguing new set of nonlinear quantum gates
to the toolbox of the quantum algorithm designer. Furthermore, a subgroup of
these nonlinear evolutions, called the $\mathbb{R}$-Cliffords, can be
efficiently classically simulated, by making use of the fact that Clifford
operators can simulate non-Clifford (in fact, non-linear) operators. This
perspective of using the physical operators that we have to simulate
non-physical ones that we do not is what we call bottom-up simulation, and we
give some examples of its broader implications.
|
[{'version': 'v1', 'created': 'Wed, 30 Aug 2017 16:42:07 GMT'}
{'version': 'v2', 'created': 'Thu, 19 Apr 2018 09:28:59 GMT'}]
|
2018-04-20
|
[array(['Koh', 'Dax Enshan', ''], dtype=object)
array(['Niu', 'Murphy Yuezhen', ''], dtype=object)
array(['Yoder', 'Theodore J.', ''], dtype=object)]
|
5,760 |
1804.01267
|
Helge Glockner
|
Helge Glockner and George A. Willis
|
Decompositions of locally compact contraction groups, series and
extensions
|
61 pages
| null | null | null |
math.GR math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A locally compact contraction group is a pair (G,f) where G is a locally
compact group and f an automorphism of G which is contractive in the sense that
the forward orbit under f of each g in G converges to the neutral element e, as
n tends to infinity. We show that every surjective, continuous, equivariant
homomorphism between locally compact contraction groups admits an equivariant
continuous global section. As a consequence, extensions of locally compact
contraction groups with abelian kernel can be described by continuous
equivariant cohomology. For each prime number p, we use 2-cocycles to construct
uncountably many pairwise non-isomorphic totally disconnected, locally compact
contraction groups (G,f) which are central extensions of the additive group of
the field of formal Laurent series over Z/pZ by itself. By contrast, there are
only countably many locally compact contraction groups (up to isomorphism)
which are torsion groups and abelian, as follows from a classification of the
abelian locally compact contraction groups.
|
[{'version': 'v1', 'created': 'Wed, 4 Apr 2018 07:29:14 GMT'}]
|
2018-04-05
|
[array(['Glockner', 'Helge', ''], dtype=object)
array(['Willis', 'George A.', ''], dtype=object)]
|
5,761 |
1503.01314
|
Arka Rai Choudhuri
|
Arka Rai Choudhuri, Kalyanasundaram S, Shriyak Sridhar, Annappa B
|
An Incentivized Approach for Fair Participation in Wireless Ad hoc
Networks
|
6 pages, 4 figures, published in the International Journal of Recent
Development in Engineering and Technology
|
IJRDET 2, no. 3 (2014): 117-121
| null | null |
cs.NI cs.DC cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In Wireless Ad hoc networks (WANETs), nodes separated by considerable
distance communicate with each other by relaying their messages through other
nodes. However, it might not be in the best interests of a node to forward the
message of another node due to power constraints. In addition, all nodes being
rational, some nodes may be selfish, i.e. they might not relay data from other
nodes so as to increase their lifetime. In this paper, we present a fair and
incentivized approach for participation in Ad hoc networks. Given the power
required for each transmission, we are able to determine the power saving
contributed by each intermediate hop. We propose the FAir Share incenTivizEd Ad
hoc paRticipation protocol (FASTER), which takes a selected route from a
routing protocol as input, to calculate the worth of each node using the
cooperative game theory concept of 'Shapley Value' applied on the power saved
by each node. This value can be used for allocation of Virtual Currency to the
nodes, which can be spent on subsequent message transmissions.
|
[{'version': 'v1', 'created': 'Wed, 4 Mar 2015 14:22:25 GMT'}]
|
2015-03-05
|
[array(['Choudhuri', 'Arka Rai', ''], dtype=object)
array(['S', 'Kalyanasundaram', ''], dtype=object)
array(['Sridhar', 'Shriyak', ''], dtype=object)
array(['B', 'Annappa', ''], dtype=object)]
|
5,762 |
1811.02318
|
Lingbing Guo
|
Lingbing Guo, Zequn Sun, Ermei Cao, Wei Hu
|
Recurrent Skipping Networks for Entity Alignment
| null | null | null | null |
cs.CL cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the problem of learning knowledge graph (KG) embeddings for
entity alignment (EA). Current methods use the embedding models mainly focusing
on triple-level learning, which lacks the ability of capturing long-term
dependencies existing in KGs. Consequently, the embedding-based EA methods
heavily rely on the amount of prior (known) alignment, due to the identity
information in the prior alignment cannot be efficiently propagated from one KG
to another. In this paper, we propose RSN4EA (recurrent skipping networks for
EA), which leverages biased random walk sampling for generating long paths
across KGs and models the paths with a novel recurrent skipping network (RSN).
RSN integrates the conventional recurrent neural network (RNN) with residual
learning and can largely improve the convergence speed and performance with
only a few more parameters. We evaluated RSN4EA on a series of datasets
constructed from real-world KGs. Our experimental results showed that it
outperformed a number of state-of-the-art embedding-based EA methods and also
achieved comparable performance for KG completion.
|
[{'version': 'v1', 'created': 'Tue, 6 Nov 2018 12:28:58 GMT'}]
|
2018-11-07
|
[array(['Guo', 'Lingbing', ''], dtype=object)
array(['Sun', 'Zequn', ''], dtype=object)
array(['Cao', 'Ermei', ''], dtype=object)
array(['Hu', 'Wei', ''], dtype=object)]
|
5,763 |
1611.09637
|
Zolt\'an Bl\'azsik L.
|
Zolt\'an Bl\'azsik, Zolt\'an L\'or\'ant Nagy
|
Partition dimension of projective planes
|
11 pages
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We determine the partition dimension of the incidence graph $G(\Pi_q)$ of the
projective plane $\Pi_q$ up to a constant factor $2$ as $(2+o(1))\log_2{q}\leq
\mathrm{pd}(G(\Pi_q))\leq (4+o(1))\log_2{q}.$
|
[{'version': 'v1', 'created': 'Tue, 29 Nov 2016 14:07:14 GMT'}]
|
2016-11-30
|
[array(['Blázsik', 'Zoltán', ''], dtype=object)
array(['Nagy', 'Zoltán Lóránt', ''], dtype=object)]
|
5,764 |
2005.14423
|
Hossein Jalali
|
S. Ghasemi, M. Alihosseini, F. Peymanirad, H. Jalali, S. A. Ketabi, F.
Khoeini and M. Neek-Amal
|
Electronic, dielectric and optical properties of two dimensional and
bulk ice: a multi-scale simulation study
| null |
Physical Review B 101.18 (2020): 184202
|
10.1103/PhysRevB.101.184202
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The intercalated water into nanopores exhibits anomalous properties such as
ultralow dielectric constant.~Multi-scale modeling and simulations are used to
investigate the dielectric properties of various crystalline two-dimensional
ices and bulk ices. Although, the structural properties of two-dimensional
(2D-) ices have been extensively studied, much less is known about their
electronic and optical properties. First, by using density functional theory
(DFT) and density functional perturbation theory (DFPT), we calculate the key
electronic, optical and dielectric properties of 2D-ices. Performing DFPT
calculations, both the ionic and electronic contributions of the dielectric
constant are computed. The in-plane electronic dielectric constant is found to
be larger than the out-of-plane dielectric constant for all the studied
2D-ices. The in-plane dielectric constant of the electronic response is found
to be isotropic for all the studied ices. Secondly, we determined the dipolar
dielectric constant of 2D-ices using molecular dynamics simulations (MDS) at
finite temperature. The total out-of-plane dielectric constant is found to be
larger than 2 for all the studied 2D-ices. Within the framework of the
random-phase approximation (RPA), the absorption energy ranges for 2D-ices are
found to be in the ultraviolet spectra. For the comparison purposes, we also
elucidate the electronic, dielectric and optical properties of four crystalline
ices (ice VIII, ice XI, ice Ic and ice Ih) and bulk water.
|
[{'version': 'v1', 'created': 'Fri, 29 May 2020 07:13:30 GMT'}
{'version': 'v2', 'created': 'Sun, 7 Jun 2020 05:15:08 GMT'}
{'version': 'v3', 'created': 'Tue, 30 Jun 2020 07:00:59 GMT'}
{'version': 'v4', 'created': 'Wed, 1 Jul 2020 05:59:30 GMT'}]
|
2020-07-02
|
[array(['Ghasemi', 'S.', ''], dtype=object)
array(['Alihosseini', 'M.', ''], dtype=object)
array(['Peymanirad', 'F.', ''], dtype=object)
array(['Jalali', 'H.', ''], dtype=object)
array(['Ketabi', 'S. A.', ''], dtype=object)
array(['Khoeini', 'F.', ''], dtype=object)
array(['Neek-Amal', 'M.', ''], dtype=object)]
|
5,765 |
1901.09815
|
David Hartich
|
David Hartich, Aljaz Godec
|
Reaction kinetics in the few-encounter limit
|
16 pages, 5 figures, Chapter 11 in "Chemical Kinetics Beyond the
Textbook" edited by K. Lindenberg, R. Metzler, Gleb Oshanin (World
Scientific, 2019)
| null |
10.1142/9781786347015_0011
| null |
cond-mat.stat-mech math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The classical theory of chemical reactions can be understood in terms of
diffusive barrier crossing, where the rate of a reaction is determined by the
inverse of the mean first passage time (FPT) to cross a free energy barrier.
Whenever a few reaction events suffice to trigger a response or the energy
barriers are not high, the mean first passage time alone does not suffice to
characterize the kinetics, i.e., the kinetics do not occur on a single
time-scale. Instead, the full statistics of the FPT are required. We present a
spectral representation of the FPT statistics that allows us to understand and
accurately determine FPT distributions over several orders of magnitudes in
time. A canonical narrowing of the first passage density is shown to emerge
whenever several molecules are searching for the same target, which was termed
the 'few-encounter limit'. The few-encounter limit is essential in all
situations, in which already the first encounter triggers a response, such as
misfolding-triggered aggregation of proteins or protein transcription
regulation.
|
[{'version': 'v1', 'created': 'Mon, 28 Jan 2019 17:08:48 GMT'}
{'version': 'v2', 'created': 'Thu, 21 Nov 2019 10:40:13 GMT'}]
|
2019-11-22
|
[array(['Hartich', 'David', ''], dtype=object)
array(['Godec', 'Aljaz', ''], dtype=object)]
|
5,766 |
1112.4857
|
Xiang Tang
|
M. J. Pflaum, H. Posthuma, and X. Tang
|
The localized longitudinal index theorem for Lie groupoids and the van
Est map
|
40 pages
| null | null | null |
math.KT math.DG math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We define the "localized index" of longitudinal elliptic operators on Lie
groupoids associated to Lie algebroid cohomology classes. We derive a
topological expression for these numbers using the algebraic index theorem for
Poisson manifolds on the dual of the Lie algebroid. Underlying the definition
and computation of the localized index, is an action of the Hopf algebroid of
jets around the unit space, and the characteristic map it induces on Lie
algebroid cohomology. This map can be globalized to differentiable groupoid
cohomology, giving a definition as well as a computation of the "global index".
The correspondence between the "global" and "localized" index is given by the
van Est map for Lie groupoids.
|
[{'version': 'v1', 'created': 'Tue, 20 Dec 2011 21:16:53 GMT'}]
|
2011-12-22
|
[array(['Pflaum', 'M. J.', ''], dtype=object)
array(['Posthuma', 'H.', ''], dtype=object)
array(['Tang', 'X.', ''], dtype=object)]
|
5,767 |
2001.05135
|
Jorge Puebla
|
Mingran Xu, Kei Yamamoto, Jorge Puebla, Korbinian Baumgaertl, Bivas
Rana, Katsuya Miura, Hiromasa Takahashi, Dirk Grundler, Sadamichi Maekawa and
Yoshichika Otani
|
Nonreciprocal surface acoustic wave propagation via magneto-rotation
coupling
|
30 pages, 12 figures
|
Science Advances 07 Aug 2020: Vol. 6, no. 32, eabb1724
|
10.1126/sciadv.abb1724
| null |
cond-mat.mes-hall physics.app-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One of the most fundamental forms of magnon-phonon interaction is an
intrinsic property of magnetic materials, the "magnetoelastic coupling". This
particular form of interaction has been the basis for describing magnetic
materials and their strain related applications, where strain induces changes
of internal magnetic fields. Different from the magnetoelastic coupling, more
than 40 years ago, it was proposed that surface acoustic waves may induce
surface magnons via rotational motion of the lattice in anisotropic magnets.
However, a signature of this magnon-phonon coupling mechanism, termed
magneto-rotation coupling, has been elusive. Here, we report the first
observation and theoretical framework of the magneto-rotation coupling in a
perpendicularly anisotropic ultra-thin film Ta/CoFeB(1.6 nm)/MgO, which
consequently induces nonreciprocal acoustic wave attenuation with a
unprecedented ratio up to 100$\%$ rectification at the theoretically predicted
optimized condition. Our work not only experimentally demonstrates a
fundamentally new path for investigating magnon-phonon coupling, but also
justify the feasibility of the magneto-rotation coupling based application.
|
[{'version': 'v1', 'created': 'Wed, 15 Jan 2020 05:09:14 GMT'}
{'version': 'v2', 'created': 'Wed, 11 Mar 2020 07:48:12 GMT'}
{'version': 'v3', 'created': 'Tue, 11 Aug 2020 07:05:10 GMT'}]
|
2020-08-12
|
[array(['Xu', 'Mingran', ''], dtype=object)
array(['Yamamoto', 'Kei', ''], dtype=object)
array(['Puebla', 'Jorge', ''], dtype=object)
array(['Baumgaertl', 'Korbinian', ''], dtype=object)
array(['Rana', 'Bivas', ''], dtype=object)
array(['Miura', 'Katsuya', ''], dtype=object)
array(['Takahashi', 'Hiromasa', ''], dtype=object)
array(['Grundler', 'Dirk', ''], dtype=object)
array(['Maekawa', 'Sadamichi', ''], dtype=object)
array(['Otani', 'Yoshichika', ''], dtype=object)]
|
5,768 |
1803.04221
|
Jennifer Wadsworth
|
Sebastian Engelke, Thomas Opitz and Jennifer Wadsworth
|
Extremal dependence of random scale constructions
| null | null | null | null |
math.PR math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A bivariate random vector can exhibit either asymptotic independence or
dependence between the largest values of its components. When used as a
statistical model for risk assessment in fields such as finance, insurance or
meteorology, it is crucial to understand which of the two asymptotic regimes
occurs. Motivated by their ubiquity and flexibility, we consider the extremal
dependence properties of vectors with a random scale construction
$(X_1,X_2)=R(W_1,W_2)$, with non-degenerate $R>0$ independent of $(W_1,W_2)$.
Focusing on the presence and strength of asymptotic tail dependence, as
expressed through commonly-used summary parameters, broad factors that affect
the results are: the heaviness of the tails of $R$ and $(W_1,W_2)$, the shape
of the support of $(W_1,W_2)$, and dependence between $(W_1,W_2)$. When $R$ is
distinctly lighter tailed than $(W_1,W_2)$, the extremal dependence of
$(X_1,X_2)$ is typically the same as that of $(W_1,W_2)$, whereas similar or
heavier tails for $R$ compared to $(W_1,W_2)$ typically result in increased
extremal dependence. Similar tail heavinesses represent the most interesting
and technical cases, and we find both asymptotic independence and dependence of
$(X_1,X_2)$ possible in such cases when $(W_1,W_2)$ exhibit asymptotic
independence. The bivariate case often directly extends to higher-dimensional
vectors and spatial processes, where the dependence is mainly analyzed in terms
of summaries of bivariate sub-vectors. The results unify and extend many
existing examples, and we use them to propose new models that encompass both
dependence classes.
|
[{'version': 'v1', 'created': 'Mon, 12 Mar 2018 12:40:11 GMT'}
{'version': 'v2', 'created': 'Fri, 26 Apr 2019 09:01:45 GMT'}]
|
2019-04-29
|
[array(['Engelke', 'Sebastian', ''], dtype=object)
array(['Opitz', 'Thomas', ''], dtype=object)
array(['Wadsworth', 'Jennifer', ''], dtype=object)]
|
5,769 |
2005.08715
|
Amin Faraji Astaneh
|
Mohsen Alishahiha, Amin Faraji Astaneh and Ali Naseh
|
Island in the Presence of Higher Derivative Terms
|
18 pages, 3 figures, published version
| null |
10.1007/JHEP02(2021)035
| null |
hep-th gr-qc quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using extended island formula we compute entanglement entropy of Hawking
radiation for black hole solutions of certain gravitational models containing
higher derivative terms. To be concrete we consider two different four
dimensional models to compute entropy for both asymptotically flat and AdS
black holes. One observes that the resultant entropy follows the Page curve,
thanks to the contribution of the island, despite the fact that the
corresponding gravitational models might be non-unitary.
|
[{'version': 'v1', 'created': 'Mon, 18 May 2020 13:44:03 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Feb 2021 17:44:04 GMT'}]
|
2021-02-24
|
[array(['Alishahiha', 'Mohsen', ''], dtype=object)
array(['Astaneh', 'Amin Faraji', ''], dtype=object)
array(['Naseh', 'Ali', ''], dtype=object)]
|
5,770 |
2207.14743
|
Aneurin (Nye) Evans
|
A. Evans (Keele University, UK), B. Pimpanuwat, A. M. S. Richards
(Jodrell Bank Centre for Astrophysics, University of Manchester, UK), D. P.
K. Banerjee (Physical Research Laboratory, Ahmedabad, India), U. Munari (INAF
Astronomical Observatory of Padova, Asiago, Italy), M. D. Gray (National
Astronomical Research Institute of Thailand, Jodrell Bank), B. Hutawarakorn
Kramer (National Astronomical Research Institute of Thailand,
Max-Planck-Institut fur Radioastronomie, Germany), A. Kraus
(Max-Planck-Institut fur Radioastronomie, Germany)
|
Stringent limits on $^{28}$SiO maser emission from the recurrent nova T
Coronae Borealis
|
Published in MNRAS, 514, 4894 - 4897 (2022)
|
MNRAS, 514, 4894 - 4897 (2022)
|
10.1093/mnras/stac1589
| null |
astro-ph.SR astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There are indications that the third known eruption of the recurrent nova T
CrB is imminent, and multi-wavelength observations prior to the eruption are
important to characterise the system before it erupts. T CrB is known to
display the SiO fundamental vibrational feature at 8$\,\mu$m. When the
anticipated eruption occurs, it is possible that the shock produced when the
ejected material runs into the wind of the red giant in the system may be
traced using SiO maser emission. We have used the 100m Effelsberg Radio
Telescope to search for $^{28}$SiO emission in the $\upsilon=1$, $\upsilon=2$,
$J=1\rightarrow0$ transitions, at 43.122 GHz and 42.820~GHz respectively, while
the system is in quiescence. We find no evidence for such emission.
|
[{'version': 'v1', 'created': 'Fri, 29 Jul 2022 15:29:55 GMT'}]
|
2022-08-01
|
[array(['Evans', 'A.', '', 'Keele University, UK'], dtype=object)
array(['Pimpanuwat', 'B.', '',
'Jodrell Bank Centre for Astrophysics, University of Manchester, UK'],
dtype=object)
array(['Richards', 'A. M. S.', '',
'Jodrell Bank Centre for Astrophysics, University of Manchester, UK'],
dtype=object)
array(['Banerjee', 'D. P. K.', '',
'Physical Research Laboratory, Ahmedabad, India'], dtype=object)
array(['Munari', 'U.', '',
'INAF\n Astronomical Observatory of Padova, Asiago, Italy'],
dtype=object)
array(['Gray', 'M. D.', '',
'National\n Astronomical Research Institute of Thailand, Jodrell Bank'],
dtype=object)
array(['Kramer', 'B. Hutawarakorn', '',
'National Astronomical Research Institute of Thailand,\n Max-Planck-Institut fur Radioastronomie, Germany'],
dtype=object)
array(['Kraus', 'A.', '',
'Max-Planck-Institut fur Radioastronomie, Germany'], dtype=object)]
|
5,771 |
1911.02601
|
Joaquin Goni
|
Enrico Amico, Kausar Abbas, Duy Anh Duong-Tran, Uttara Tipnis,
Meenusree Rajapandian, Evgeny Chumin, Mario Ventresca, Jaroslaw Harezlak,
Joaqu\'in Go\~ni
|
Towards an information theoretical description of communication in brain
networks
|
28 pages; 4 figures; 1 table; 2 supplementary figures; 2
supplementary tables
| null | null | null |
q-bio.NC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Modeling communication dynamics in the brain is a key challenge in network
neuroscience. We present here a framework that combines two measurements for
any system where different communication processes are taking place on top of a
fixed structural topology: Path Processing Score (PPS) estimates how much the
brain signal has changed or has been transformed between any two brain regions
(source and target); Path Broadcasting Strength (PBS) estimates the propagation
of the signal through edges adjacent to the path being assessed. We use PPS and
PBS to explore communication dynamics in large-scale brain networks. We show
that brain communication dynamics can be divided into three main 'communication
regimes' of information transfer: absent communication (no communication
happening); relay communication (information is being transferred almost
intact); transducted communication (the information is being transformed). We
use PBS to categorize brain regions based on the way they broadcast
information. Subcortical regions are mainly direct broadcasters to multiple
receivers; Temporal and frontal nodes mainly operate as broadcast relay brain
stations; Visual and somato-motor cortices act as multi-channel transducted
broadcasters. This work paves the way towards the field of brain network
information theory by providing a principled methodology to explore
communication dynamics in large-scale brain networks.
|
[{'version': 'v1', 'created': 'Wed, 6 Nov 2019 19:18:17 GMT'}
{'version': 'v2', 'created': 'Fri, 2 Oct 2020 19:21:35 GMT'}]
|
2020-10-06
|
[array(['Amico', 'Enrico', ''], dtype=object)
array(['Abbas', 'Kausar', ''], dtype=object)
array(['Duong-Tran', 'Duy Anh', ''], dtype=object)
array(['Tipnis', 'Uttara', ''], dtype=object)
array(['Rajapandian', 'Meenusree', ''], dtype=object)
array(['Chumin', 'Evgeny', ''], dtype=object)
array(['Ventresca', 'Mario', ''], dtype=object)
array(['Harezlak', 'Jaroslaw', ''], dtype=object)
array(['Goñi', 'Joaquín', ''], dtype=object)]
|
5,772 |
hep-ph/0303112
|
Lian-You Shan
|
Lian-You Shan, Yi-Fang Wang, Chang-Gen Yang, Xinmin Zhang, Fu-Tian
Liu, Bing-Lin Young
|
Modeling realistic Earth matter density for CP violation in neutrino
oscillation
|
16 pages, 8 figures
|
Phys.Rev.D68:013002,2003
|
10.1103/PhysRevD.68.013002
|
VLBL Study Group-H2B-8, AS-IHEP-2002-030
|
hep-ph
| null |
We examine the effect of a more realistic Earth matter density model which
takes into account of the local density variations along the baseline of a
possi ble 2100 km very long baseline neutrino oscillation experiment. Its
influence to the measurement of CP violation is investigated and a comparison
with the commonly used global density models made. Significant differences are
found in the comparison of the results of the different density models.
|
[{'version': 'v1', 'created': 'Thu, 13 Mar 2003 16:48:04 GMT'}]
|
2014-11-17
|
[array(['Shan', 'Lian-You', ''], dtype=object)
array(['Wang', 'Yi-Fang', ''], dtype=object)
array(['Yang', 'Chang-Gen', ''], dtype=object)
array(['Zhang', 'Xinmin', ''], dtype=object)
array(['Liu', 'Fu-Tian', ''], dtype=object)
array(['Young', 'Bing-Lin', ''], dtype=object)]
|
5,773 |
1512.08353
|
Yannick Sire
|
Armin Schikorra, Yannick Sire, Changyou Wang
|
Weak solutions of geometric flows associated to integro-differential
harmonic maps
| null | null |
10.1007/s00229-016-0899-y
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The purpose of this note is to prove the existence of global weak solutions
to the flow associated to integro-differential harmonic maps into spheres and
Riemannian homogeneous manifolds.
|
[{'version': 'v1', 'created': 'Mon, 28 Dec 2015 09:15:47 GMT'}]
|
2016-11-08
|
[array(['Schikorra', 'Armin', ''], dtype=object)
array(['Sire', 'Yannick', ''], dtype=object)
array(['Wang', 'Changyou', ''], dtype=object)]
|
5,774 |
2301.09524
|
Tome Eftimov
|
Ana Nikolikj, Carola Doerr, Tome Eftimov
|
RF+clust for Leave-One-Problem-Out Performance Prediction
|
To appear at EvoApps 2023
| null | null | null |
cs.NE cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Per-instance automated algorithm configuration and selection are gaining
significant moments in evolutionary computation in recent years. Two crucial,
sometimes implicit, ingredients for these automated machine learning (AutoML)
methods are 1) feature-based representations of the problem instances and 2)
performance prediction methods that take the features as input to estimate how
well a specific algorithm instance will perform on a given problem instance.
Non-surprisingly, common machine learning models fail to make predictions for
instances whose feature-based representation is underrepresented or not covered
in the training data, resulting in poor generalization ability of the models
for problems not seen during training.In this work, we study
leave-one-problem-out (LOPO) performance prediction. We analyze whether
standard random forest (RF) model predictions can be improved by calibrating
them with a weighted average of performance values obtained by the algorithm on
problem instances that are sufficiently close to the problem for which a
performance prediction is sought, measured by cosine similarity in feature
space. While our RF+clust approach obtains more accurate performance prediction
for several problems, its predictive power crucially depends on the chosen
similarity threshold as well as on the feature portfolio for which the cosine
similarity is measured, thereby opening a new angle for feature selection in a
zero-shot learning setting, as LOPO is termed in machine learning.
|
[{'version': 'v1', 'created': 'Mon, 23 Jan 2023 16:14:59 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Jan 2023 09:38:54 GMT'}]
|
2023-01-25
|
[array(['Nikolikj', 'Ana', ''], dtype=object)
array(['Doerr', 'Carola', ''], dtype=object)
array(['Eftimov', 'Tome', ''], dtype=object)]
|
5,775 |
physics/0403097
|
Dmitry Budker
|
M. Auzinsh, D. Budker D. F. Kimball, S. M. Rochester, J. E. Stalnaker,
A. O. Sushkov, V. V. Yashchuk
|
Can a quantum nondemolition measurement improve the sensitivity of an
atomic magnetometer?
|
Some details of calculations can be found in a companion note:
physics/0407125
| null |
10.1103/PhysRevLett.93.173002
| null |
physics.atom-ph
| null |
Noise properties of an idealized atomic magnetometer that utilizes spin
squeezing induced by a continuous quantum nondemolition measurement are
considered. Such a magnetometer measures spin precession of $N$ atomic spins by
detecting optical rotation of far-detuned light. Fundamental noise sources
include the quantum projection noise and the photon shot-noise. For measurement
times much shorter than the spin-relaxation time observed in the absence of
light ($\tau_{\rm rel}$) divided by $\sqrt{N}$, the optimal sensitivity of the
magnetometer scales as $N^{-3/4}$, so an advantage over the usual sensitivity
scaling as $N^{-1/2}$ can be achieved. However, at longer measurement times,
the optimized sensitivity scales as $N^{-1/2}$, as for a usual shot-noise
limited magnetometer. If strongly squeezed probe light is used, the Heisenberg
uncertainty limit may, in principle, be reached for very short measurement
times. However, if the measurement time exceeds $\tau_{\rm rel}/N$, the
$N^{-1/2}$ scaling is again restored.
|
[{'version': 'v1', 'created': 'Sat, 20 Mar 2004 01:08:26 GMT'}
{'version': 'v2', 'created': 'Wed, 24 Mar 2004 09:30:46 GMT'}
{'version': 'v3', 'created': 'Fri, 26 Mar 2004 01:50:59 GMT'}
{'version': 'v4', 'created': 'Sat, 24 Jul 2004 02:28:34 GMT'}]
|
2009-11-10
|
[array(['Auzinsh', 'M.', ''], dtype=object)
array(['Kimball', 'D. Budker D. F.', ''], dtype=object)
array(['Rochester', 'S. M.', ''], dtype=object)
array(['Stalnaker', 'J. E.', ''], dtype=object)
array(['Sushkov', 'A. O.', ''], dtype=object)
array(['Yashchuk', 'V. V.', ''], dtype=object)]
|
5,776 |
1109.3675
|
Ting-Wai Chiu
|
Ting-Wai Chiu, Tung-Han Hsieh, Yao-Yuan Mao (TWQCD Collaboration)
|
Pseudoscalar Meson in Two Flavors QCD with the Optimal Domain-Wall
Fermion
|
12 pages, v2: updated results with full statistics
|
Phys. Lett. B 717 (2012) 420
|
10.1016/j.physletb.2012.09.067
|
NTUTH-11-505E
|
hep-lat hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We perform hybrid Monte Carlo (HMC) simulatons of two flavors QCD with the
optimal domain-wall fermion (ODWF) on the 16^3 x 32 lattice (with lattice
spacing a ~ 0.1 fm), for eight sea-quark masses corresponding to pion masses in
the range 228-565 MeV. We calculate the mass and the decay constant of the
pseudoscalar meson, and compare our data with the chiral perturbation theory
(ChPT). We find that our data is in good agreement with the sea-quark mass
dependence predicted by the next-to-leading order (NLO) ChPT, and provides a
determination of the low-energy constants \bar{l}_3 and \bar{l}_4, the pion
decay constant, the chiral condensate, and the average up and down quark mass.
|
[{'version': 'v1', 'created': 'Fri, 16 Sep 2011 17:46:00 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Sep 2012 15:22:23 GMT'}]
|
2015-03-19
|
[array(['Chiu', 'Ting-Wai', '', 'TWQCD Collaboration'], dtype=object)
array(['Hsieh', 'Tung-Han', '', 'TWQCD Collaboration'], dtype=object)
array(['Mao', 'Yao-Yuan', '', 'TWQCD Collaboration'], dtype=object)]
|
5,777 |
2112.05844
|
Haojiao Liang
|
Haojiao Liang, Huiping Li, Jian Gao, Rongxin Cui, and Demin Xu
|
Economic MPC-based planning for marine vehicles: Tuning safety and
energy efficiency
| null | null | null | null |
eess.SY cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Energy efficiency and safety are two critical objectives for marine vehicles
operating in environments with obstacles, and they generally conflict with each
other. In this paper, we propose a novel online motion planning method of
marine vehicles which can make trade-offs between the two design objectives
based on the framework of economic model predictive control (EMPC). Firstly,
the feasible trajectory with the most safety margin is designed and utilized as
tracking reference. Secondly, the EMPC-based receding horizon motion planning
algorithm is designed, in which the practical consumed energy and safety
measure (i.e., the distance between the planning trajectory and the reference)
are considered. Experimental results verify the effectiveness and feasibility
of the proposed method.
|
[{'version': 'v1', 'created': 'Fri, 10 Dec 2021 21:58:32 GMT'}]
|
2021-12-14
|
[array(['Liang', 'Haojiao', ''], dtype=object)
array(['Li', 'Huiping', ''], dtype=object)
array(['Gao', 'Jian', ''], dtype=object)
array(['Cui', 'Rongxin', ''], dtype=object)
array(['Xu', 'Demin', ''], dtype=object)]
|
5,778 |
2206.10999
|
Richard Lange
|
Richard D. Lange, Devin Kwok, Jordan Matelsky, Xinyue Wang, David S.
Rolnick, Konrad P. Kording
|
Neural Networks as Paths through the Space of Representations
|
10 pages, submitted to ICLR 2023
| null | null | null |
cs.LG cs.NE
|
http://creativecommons.org/licenses/by/4.0/
|
Deep neural networks implement a sequence of layer-by-layer operations that
are each relatively easy to understand, but the resulting overall computation
is generally difficult to understand. We consider a simple hypothesis for
interpreting the layer-by-layer construction of useful representations: perhaps
the role of each layer is to reformat information to reduce the "distance" to
the desired outputs. With this framework, the layer-wise computation
implemented by a deep neural network can be viewed as a path through a
high-dimensional representation space. We formalize this intuitive idea of a
"path" by leveraging recent advances in *metric* representational similarity.
We extend existing representational distance methods by computing geodesics,
angles, and projections of representations, going beyond mere layer distances.
We then demonstrate these tools by visualizing and comparing the paths taken by
ResNet and VGG architectures on CIFAR-10. We conclude by sketching additional
ways that this kind of representational geometry can be used to understand and
interpret network training, and to describe novel kinds of similarities between
different models.
|
[{'version': 'v1', 'created': 'Wed, 22 Jun 2022 11:59:10 GMT'}
{'version': 'v2', 'created': 'Sun, 27 Nov 2022 19:43:47 GMT'}]
|
2022-11-29
|
[array(['Lange', 'Richard D.', ''], dtype=object)
array(['Kwok', 'Devin', ''], dtype=object)
array(['Matelsky', 'Jordan', ''], dtype=object)
array(['Wang', 'Xinyue', ''], dtype=object)
array(['Rolnick', 'David S.', ''], dtype=object)
array(['Kording', 'Konrad P.', ''], dtype=object)]
|
5,779 |
1704.07785
|
Gautam Goel
|
Gautam Goel, Niangjun Chen, Adam Wierman
|
Thinking Fast and Slow: Optimization Decomposition Across Timescales
| null | null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Many real-world control systems, such as the smart grid and human
sensorimotor control systems, have decentralized components that react quickly
using local information and centralized components that react slowly using a
more global view. This paper seeks to provide a theoretical framework for how
to design controllers that are decomposed across timescales in this way. The
framework is analogous to how the network utility maximization framework uses
optimization decomposition to distribute a global control problem across
independent controllers, each of which solves a local problem; except our goal
is to decompose a global problem temporally, extracting a timescale separation.
Our results highlight that decomposition of a multi-timescale controller into a
fast timescale, reactive controller and a slow timescale, predictive controller
can be near-optimal in a strong sense. In particular, we exhibit such a design,
named Multi-timescale Reflexive Predictive Control (MRPC), which maintains a
per-timestep cost within a constant factor of the offline optimal in an
adversarial setting.
|
[{'version': 'v1', 'created': 'Tue, 25 Apr 2017 16:58:13 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Nov 2017 20:45:23 GMT'}]
|
2017-11-15
|
[array(['Goel', 'Gautam', ''], dtype=object)
array(['Chen', 'Niangjun', ''], dtype=object)
array(['Wierman', 'Adam', ''], dtype=object)]
|
5,780 |
1409.6435
|
Carlos L. Benavides-Riveros
|
Carlos L. Benavides-Riveros, Jos\'e M. Gracia-Bond\'ia and Michael
Springborg
|
Why doubly excited determinants govern configuration interaction
calculations of electron correlations
|
4 pages, 1 figure, reference added
| null | null | null |
quant-ph cond-mat.str-el physics.atm-clus physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Computational evidence shows that, when using natural orbitals to study
(dynamical and non-dynamical) electron correlation, determinants with an odd
number of excitations play a negligible role. Instead, doubly excited
determinants rule the rostrum in this kind of configuration interaction
calculations. We explain mathematically why it must be so.
|
[{'version': 'v1', 'created': 'Tue, 23 Sep 2014 08:04:03 GMT'}
{'version': 'v2', 'created': 'Sat, 27 Sep 2014 19:47:19 GMT'}]
|
2014-10-02
|
[array(['Benavides-Riveros', 'Carlos L.', ''], dtype=object)
array(['Gracia-Bondía', 'José M.', ''], dtype=object)
array(['Springborg', 'Michael', ''], dtype=object)]
|
5,781 |
1506.07160
|
Cesar S. Lopez-Monsalvo
|
A. Bravetti, C. S. Lopez-Monsalvo and F. Nettel
|
Conformal Gauge Transformations in Thermodynamics
| null |
Entropy 2015, 17, 6150-6168
|
10.3390/e17096150
| null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we consider conformal gauge transformations of the geometric
structure of thermodynamic fluctuation theory. In particular, we show that the
Thermodynamic Phase Space is naturally endowed with a non-integrable
connection, defined by all those processes that annihilate the Gibbs 1-form,
i.e. reversible processes. Therefore the geometry of reversible processes is
invariant under re-scalings, that is, it has a conformal gauge freedom.
Interestingly, as a consequence of the non-integrability of the connection, its
curvature is not invariant under conformal gauge transformations and,
therefore, neither is the associated pseudo-Riemannian geometry. We argue that
this is not surprising, since these two objects are associated with
irreversible processes. Moreover, we provide the explicit form in which all the
elements of the geometric structure of the Thermodynamic Phase Space change
under a conformal gauge transformation. As an example, we revisit the change of
the thermodynamic representation and consider the resulting change between the
two metrics on the Thermodynamic Phase Space which induce Weinhold's energy
metric and Ruppeiner's entropy metric. As a by-product we obtain a proof of the
well-known conformal relation between Weinhold's and Ruppeiner's metrics along
the equilibrium directions. Finally, we find interesting properties of the
almost para-contact structure and of its eigenvectors which may be of physical
interest.
|
[{'version': 'v1', 'created': 'Tue, 23 Jun 2015 19:53:31 GMT'}]
|
2015-09-04
|
[array(['Bravetti', 'A.', ''], dtype=object)
array(['Lopez-Monsalvo', 'C. S.', ''], dtype=object)
array(['Nettel', 'F.', ''], dtype=object)]
|
5,782 |
2011.12595
|
Andrea Gilardi
|
Andrea Gilardi and Jorge Mateu and Riccardo Borgoni and Robin Lovelace
|
Multivariate hierarchical analysis of car crashes data considering a
spatial network lattice
|
23 pages, 5 tables, 8 figures
|
JRSSA, Volume 185, Issue 3, July 2022, Pages 1150-1177
|
10.1111/rssa.12823
| null |
stat.AP
|
http://creativecommons.org/licenses/by/4.0/
|
Road traffic casualties represent a hidden global epidemic, demanding
evidence-based interventions. This paper demonstrates a network lattice
approach for identifying road segments of particular concern, based on a case
study of a major city (Leeds, UK), in which 5,862 crashes of different
severities were recorded over an eight-year period (2011-2018). We consider a
family of Bayesian hierarchical models that include spatially structured and
unstructured random effects, to capture the dependencies between the severity
levels. Results highlight roads that are more prone to collisions, relative to
estimated traffic volumes, in the northwest and south of city-centre. We
analyse the Modifiable Areal Unit Problem (MAUP), proposing a novel procedure
to investigate the presence of MAUP on a network lattice. We conclude that our
methods enable a reliable estimation of road safety levels to help identify
"hotspots" on the road network and to inform effective local interventions.
|
[{'version': 'v1', 'created': 'Wed, 25 Nov 2020 09:13:19 GMT'}
{'version': 'v2', 'created': 'Fri, 25 Jun 2021 12:18:29 GMT'}]
|
2023-03-13
|
[array(['Gilardi', 'Andrea', ''], dtype=object)
array(['Mateu', 'Jorge', ''], dtype=object)
array(['Borgoni', 'Riccardo', ''], dtype=object)
array(['Lovelace', 'Robin', ''], dtype=object)]
|
5,783 |
1006.2179
|
Hermine Landt
|
Hermine Landt (1), Chi C. Cheung (2,3) and Stephen E. Healey (4) ((1)
University of Melbourne, (2) NASA Goddard Space Flight Center, (3) NRL, (4)
Stanford University)
|
The optical spectra of X-shaped radio galaxies
|
12 pages, 8 figures, accepted by MNRAS
| null |
10.1111/j.1365-2966.2010.17183.x
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
X-shaped radio galaxies are defined by their peculiar large-scale radio
morphology. In addition to the classical double-lobed structure they have a
pair of low-luminosity wings that straddles the nucleus at almost right angles
to the active lobes, thus giving the impression of an 'X'. In this paper we
study for the first time the optical spectral properties of this object class
using a large sample (~50 sources). We find that the X-shaped radio population
is composed roughly equally of sources with weak and strong emission line
spectra, which makes them, in combination with the well-known fact that they
preferentially have radio powers intermediate between those of Fanaroff-Riley
type I (FR I) and type II (FR II) radio galaxies, the archetypal transition
population. We do not find evidence in support of the proposition that the
X-shape is the result of a recent merger: X-shaped radio sources do not have
unusually broad emission lines, their nuclear environments are in general not
dusty, and their host galaxies do not show signs of enhanced star formation.
Instead, we observe that the nuclear regions of X-shaped radio sources have
relatively high temperatures. This finding favours models, which propose that
the X-shape is the result of an overpressured environment.
|
[{'version': 'v1', 'created': 'Fri, 11 Jun 2010 00:57:46 GMT'}]
|
2015-05-19
|
[array(['Landt', 'Hermine', ''], dtype=object)
array(['Cheung', 'Chi C.', ''], dtype=object)
array(['Healey', 'Stephen E.', ''], dtype=object)]
|
5,784 |
1701.02851
|
Joya Deri
|
Joya A. Deri and Jos\'e M. F. Moura
|
Agile Inexact Methods for Spectral Projector-Based Graph Fourier
Transforms
| null | null | null | null |
cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose an inexact method for the graph Fourier transform of a graph
signal, as defined by the signal decomposition over the Jordan subspaces of the
graph adjacency matrix. This method projects the signal over the generalized
eigenspaces of the adjacency matrix, which accelerates the transform
computation over large, sparse, and directed adjacency matrices. The trade-off
between execution time and fidelity to the original graph structure is
discussed. In addition, properties such as a generalized Parseval's identity
and total variation ordering of the generalized eigenspaces are discussed.
The method is applied to 2010-2013 NYC taxi trip data to identify traffic
hotspots on the Manhattan grid. Our results show that identical highly
expressed geolocations can be identified with the inexact method and the method
based on eigenvector projections, while reducing computation time by a factor
of 26,000 and reducing energy dispersal among the spectral components
corresponding to the multiple zero eigenvalue.
|
[{'version': 'v1', 'created': 'Wed, 11 Jan 2017 05:46:47 GMT'}]
|
2017-01-12
|
[array(['Deri', 'Joya A.', ''], dtype=object)
array(['Moura', 'José M. F.', ''], dtype=object)]
|
5,785 |
1605.05829
|
Jie Liang
|
Jie Liang, Jun Zhou, Yuntao Qian, Lian Wen, Xiao Bai, Yongsheng Gao
|
On the Sampling Strategy for Evaluation of Spectral-spatial Methods in
Hyperspectral Image Classification
| null | null |
10.1109/TGRS.2016.2616489
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Spectral-spatial processing has been increasingly explored in remote sensing
hyperspectral image classification. While extensive studies have focused on
developing methods to improve the classification accuracy, experimental setting
and design for method evaluation have drawn little attention. In the scope of
supervised classification, we find that traditional experimental designs for
spectral processing are often improperly used in the spectral-spatial
processing context, leading to unfair or biased performance evaluation. This is
especially the case when training and testing samples are randomly drawn from
the same image - a practice that has been commonly adopted in the experiments.
Under such setting, the dependence caused by overlap between the training and
testing samples may be artificially enhanced by some spatial information
processing methods such as spatial filtering and morphological operation. Such
interaction between training and testing sets has violated data independence
assumption that is abided by supervised learning theory and performance
evaluation mechanism. Therefore, the widely adopted pixel-based random sampling
strategy is not always suitable to evaluate spectral-spatial classification
algorithms because it is difficult to determine whether the improvement of
classification accuracy is caused by incorporating spatial information into
classifier or by increasing the overlap between training and testing samples.
To partially solve this problem, we propose a novel controlled random sampling
strategy for spectral-spatial methods. It can greatly reduce the overlap
between training and testing samples and provides more objective and accurate
evaluation.
|
[{'version': 'v1', 'created': 'Thu, 19 May 2016 06:59:03 GMT'}]
|
2017-03-08
|
[array(['Liang', 'Jie', ''], dtype=object)
array(['Zhou', 'Jun', ''], dtype=object)
array(['Qian', 'Yuntao', ''], dtype=object)
array(['Wen', 'Lian', ''], dtype=object)
array(['Bai', 'Xiao', ''], dtype=object)
array(['Gao', 'Yongsheng', ''], dtype=object)]
|
5,786 |
2111.01853
|
Robert Lieck
|
Robert Lieck, Martin Rohrmeier
|
Recursive Bayesian Networks: Generalising and Unifying Probabilistic
Context-Free Grammars and Dynamic Bayesian Networks
|
In: Proceedings of the 35th Conference on Neural Information
Processing Systems (NeurIPS 2021); Code: https://github.com/robert-lieck/RBN;
Comments: corrected typo in outside probabilities: {\alpha}(y) -->
{\alpha}(x); corrected typo in Appendix C.2.1; updated references
| null | null | null |
cs.LG cs.AI cs.IR
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Probabilistic context-free grammars (PCFGs) and dynamic Bayesian networks
(DBNs) are widely used sequence models with complementary strengths and
limitations. While PCFGs allow for nested hierarchical dependencies (tree
structures), their latent variables (non-terminal symbols) have to be discrete.
In contrast, DBNs allow for continuous latent variables, but the dependencies
are strictly sequential (chain structure). Therefore, neither can be applied if
the latent variables are assumed to be continuous and also to have a nested
hierarchical dependency structure. In this paper, we present Recursive Bayesian
Networks (RBNs), which generalise and unify PCFGs and DBNs, combining their
strengths and containing both as special cases. RBNs define a joint
distribution over tree-structured Bayesian networks with discrete or continuous
latent variables. The main challenge lies in performing joint inference over
the exponential number of possible structures and the continuous variables. We
provide two solutions: 1) For arbitrary RBNs, we generalise inside and outside
probabilities from PCFGs to the mixed discrete-continuous case, which allows
for maximum posterior estimates of the continuous latent variables via gradient
descent, while marginalising over network structures. 2) For Gaussian RBNs, we
additionally derive an analytic approximation, allowing for robust parameter
optimisation and Bayesian inference. The capacity and diverse applications of
RBNs are illustrated on two examples: In a quantitative evaluation on synthetic
data, we demonstrate and discuss the advantage of RBNs for segmentation and
tree induction from noisy sequences, compared to change point detection and
hierarchical clustering. In an application to musical data, we approach the
unsolved problem of hierarchical music analysis from the raw note level and
compare our results to expert annotations.
|
[{'version': 'v1', 'created': 'Tue, 2 Nov 2021 19:21:15 GMT'}
{'version': 'v2', 'created': 'Wed, 1 Dec 2021 15:21:46 GMT'}
{'version': 'v3', 'created': 'Tue, 7 Dec 2021 19:27:49 GMT'}
{'version': 'v4', 'created': 'Sat, 15 Jan 2022 20:18:46 GMT'}]
|
2022-01-19
|
[array(['Lieck', 'Robert', ''], dtype=object)
array(['Rohrmeier', 'Martin', ''], dtype=object)]
|
5,787 |
2210.16678
|
Hiroyuki Masuyama Dr.
|
Hiroyuki Masuyama, Hiroshige Dan, and Shunji Umetani
|
Curse of Scale-Freeness: Intractability of Large-Scale Combinatorial
Optimization with Multi-Start Methods
|
Submitted to INFORMS Journal on Computing
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper considers the intractability of large-scale combinatorial
optimization with multi-start methods. To perform theoretical performance
analysis, we focus on the random multi-start (RMS) method, one of the
representative multi-start methods including the RMS local search and the
greedy randomized adaptive search procedure. Our main theoretical contribution
is to derive two power-law formulas by extreme value theory. One is for the
expected improvement rate (EIR) of the best empirical objective value (EOV),
and the other is for the expected relative gap (ERG) of the best EOV to the
supremum of empirical objective values (SEV). Notably, the ERG has
scale-freeness as a function of the number of iterations. Thus, the half-life
of the relative gap of the best EOV is eventually proportional to the number of
completed iterations by an RMS algorithm. This result can be understood as the
curse of scale-freeness: the phenomenon "as trying to get closer to the goal,
it is getting further away." Through numerical experiments, we observe that
applying several RMS algorithms to traveling salesman problems is subject to
the curse of scale-freeness. We also show that overcoming the curse of
scale-freeness requires developing an algorithm that accelerates exponentially
its performance relative to the RMS method.
|
[{'version': 'v1', 'created': 'Sat, 29 Oct 2022 19:55:35 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Nov 2022 14:04:04 GMT'}
{'version': 'v3', 'created': 'Wed, 23 Nov 2022 01:43:06 GMT'}]
|
2022-11-24
|
[array(['Masuyama', 'Hiroyuki', ''], dtype=object)
array(['Dan', 'Hiroshige', ''], dtype=object)
array(['Umetani', 'Shunji', ''], dtype=object)]
|
5,788 |
2212.03817
|
Chuheng Zhang
|
Wei Shen, Xiaonan He, Chuheng Zhang, Xuyun Zhang, Jian XIe
|
A Transformer-Based User Satisfaction Prediction for Proactive
Interaction Mechanism in DuerOS
|
Accepted by CIKM-22
| null | null | null |
cs.CL cs.AI cs.LG eess.AS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, spoken dialogue systems have been widely deployed in a variety of
applications, serving a huge number of end-users. A common issue is that the
errors resulting from noisy utterances, semantic misunderstandings, or lack of
knowledge make it hard for a real system to respond properly, possibly leading
to an unsatisfactory user experience. To avoid such a case, we consider a
proactive interaction mechanism where the system predicts the user satisfaction
with the candidate response before giving it to the user. If the user is not
likely to be satisfied according to the prediction, the system will ask the
user a suitable question to determine the real intent of the user instead of
providing the response directly. With such an interaction with the user, the
system can give a better response to the user. Previous models that predict the
user satisfaction are not applicable to DuerOS which is a large-scale
commercial dialogue system. They are based on hand-crafted features and thus
can hardly learn the complex patterns lying behind millions of conversations
and temporal dependency in multiple turns of the conversation. Moreover, they
are trained and evaluated on the benchmark datasets with adequate labels, which
are expensive to obtain in a commercial dialogue system. To face these
challenges, we propose a pipeline to predict the user satisfaction to help
DuerOS decide whether to ask for clarification in each turn. Specifically, we
propose to first generate a large number of weak labels and then train a
transformer-based model to predict the user satisfaction with these weak
labels. Empirically, we deploy and evaluate our model on DuerOS, and observe a
19% relative improvement on the accuracy of user satisfaction prediction and
2.3% relative improvement on user experience.
|
[{'version': 'v1', 'created': 'Mon, 5 Dec 2022 09:17:49 GMT'}]
|
2022-12-08
|
[array(['Shen', 'Wei', ''], dtype=object)
array(['He', 'Xiaonan', ''], dtype=object)
array(['Zhang', 'Chuheng', ''], dtype=object)
array(['Zhang', 'Xuyun', ''], dtype=object)
array(['XIe', 'Jian', ''], dtype=object)]
|
5,789 |
0903.2343
|
Alexander Kobushkin
|
Alexander Kobushkin and Yurij Kutafin
|
Non-nucleon degrees of freedom in the deuteron from the d(\vec e,e'\vec
p,)n break-up
|
5 pages, 3 figures
| null | null | null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyzed contribution of quark degrees of freedom in the deuteron to the
longitudinal, P_z', and transverse, P_x', polarizations of the proton in the
d(\vec e,e'\vec p)n break-up. It is demonstrated that such effects work in
correct direction to explain experimental data. We predict that the
polarizations should change qualitatively behavior at p_m >200 MeV/c, (i) the
polarizations become strongly dependent on the out-of-plain angle and (ii)
there appears a structure in the both polarizations at p_m ~200 MeV/c.
|
[{'version': 'v1', 'created': 'Fri, 13 Mar 2009 12:06:36 GMT'}]
|
2009-03-16
|
[array(['Kobushkin', 'Alexander', ''], dtype=object)
array(['Kutafin', 'Yurij', ''], dtype=object)]
|
5,790 |
2209.13546
|
Rajshekhar Gannavarpu
|
Jagadesh Ramaiah, Tullio de Rubeis, Rajshekhar Gannavarpu and Dario
Ambrosini
|
Quantitative flow visualization by hidden grid background oriented
schlieren
| null |
Optics and Lasers in Engineering, 160, 107307,2023
|
10.1016/j.optlaseng.2022.107307
| null |
eess.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The paper introduces hidden grid background oriented schlieren for
quantitative study and visualization of natural convection heat transfer. In
this technique, the refractive index variation, induced by the temperature
gradient, is encoded in the recorded signal phase through the distortion of a
background pattern. The background (undistorted) pattern is implicit (or
hidden) in the light source. Quantitative estimation of the phase map is
obtained by windowed Fourier transform. This method offers localized processing
of the signal using joint space-frequency representation. The performance of
hidden grid background oriented schlieren is practically demonstrated by
investigating natural convective flow, a demanding task due to its
comparatively small heat transfer.
|
[{'version': 'v1', 'created': 'Tue, 27 Sep 2022 16:55:56 GMT'}]
|
2022-10-04
|
[array(['Ramaiah', 'Jagadesh', ''], dtype=object)
array(['de Rubeis', 'Tullio', ''], dtype=object)
array(['Gannavarpu', 'Rajshekhar', ''], dtype=object)
array(['Ambrosini', 'Dario', ''], dtype=object)]
|
5,791 |
2006.05717
|
Hubert J\'o\'zwiak
|
Hubert J\'o\'zwiak, Hubert Cybulski, Piotr Wcis{\l}o
|
Hyperfine components of all rovibrational quadrupole transitions in the
H$_{2}$ and D$_{2}$ molecules
| null |
Journal of Quantitative Spectroscopy and Radiative Transfer 253,
107186, 2020
|
10.1016/j.jqsrt.2020.107186
| null |
physics.atom-ph physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report results of a theoretical investigation of hyperfine interactions in
two homonuclear isotopologues of the hydrogen molecule: H$_{2}$ and D$_{2}$. We
present a set of hyperfine coupling constants: spin-rotation, spin-spin dipole
and, in the case of the D$_{2}$ molecule, electric quadrupole coupling
constants for all bound states of the two isotopologues in their ground
electronic $X^{1}\Sigma^{+}_{g}$ state. We provide a list of positions and
intensities of 220 997 hyperfine components of 16 079 rovibrational quadrupole
transitions of the O, Q and S branches. The positions and intensities of the
hyperfine components are necessary for a reliable interpretation of accurate
measurements of rovibrational transition frequencies in H$_{2}$ and D$_{2}$,
which are used for tests of the quantum electrodynamics of molecules and
searches for new physics beyond the Standard Model.
|
[{'version': 'v1', 'created': 'Wed, 10 Jun 2020 08:19:50 GMT'}]
|
2020-07-06
|
[array(['Jóźwiak', 'Hubert', ''], dtype=object)
array(['Cybulski', 'Hubert', ''], dtype=object)
array(['Wcisło', 'Piotr', ''], dtype=object)]
|
5,792 |
2210.05085
|
Michael G. Richer
|
Michael G. Richer, Anabel Arrieta, Lorena Arias, Lesly Casta\~neda
Carlos, Silvia Torres-Peimbert, Jos\'e Alberto L\'opez and Adolfo Galindo
|
NGC 6153: Reality is complicated
|
55 pages, 51 figures, 9 tables, accepted for publication in The
Astronomical Journal
| null |
10.3847/1538-3881/ac9732
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/by-sa/4.0/
|
We study the kinematics of emission lines that arise from many physical
processes in NGC 6153 based upon deep, spatially-resolved, high resolution
spectra acquired with the UVES spectrograph at the ESO VLT. Our most basic
finding is that the plasma in NGC 6153 is complex, especially its temperature
structure. The kinematics of most emission lines defines a classic expansion
law, with the outer part expanding fastest (normal nebular plasma). However,
the permitted lines of \ion{O}{1}, \ion{C}{2}, \ion{N}{2}, \ion{O}{2}, and
\ion{Ne}{2} present a constant expansion velocity that defines a second
kinematic component (additional plasma component). The physical conditions
imply two plasma components, with the additional plasma component having lower
temperature and higher density. The [\ion{O}{2}] density and the [\ion{N}{2}]
temperature are anomalous, but may be understood considering the contribution
of recombination to these forbidden lines. The two plasma components have very
different temperatures. The normal nebular plasma appears to be have
temperature fluctuations in part of its volume (main shell), but only small
fluctuations elsewhere. The additional plasma component contains about half of
the mass of the N$^{2+}$ and O$^{2+}$ ions, but only $3-5$\% of the mass of
H$^+$ ions, so the two plasma components have very different chemical
abundances. We estimate abundances of $12+\log(\mathrm O^{2+}/\mathrm H^+)\sim
9.2$\,dex and $\mathrm{He}/\mathrm H\sim 0.13$. Although they are all
complications, multiple plasma components, temperature fluctuations, and the
contributions of multiple physical processes to a given emission line are all
part of the reality in NGC 6153, and should generally be taken into account.
|
[{'version': 'v1', 'created': 'Tue, 11 Oct 2022 01:50:47 GMT'}]
|
2022-11-30
|
[array(['Richer', 'Michael G.', ''], dtype=object)
array(['Arrieta', 'Anabel', ''], dtype=object)
array(['Arias', 'Lorena', ''], dtype=object)
array(['Carlos', 'Lesly Castañeda', ''], dtype=object)
array(['Torres-Peimbert', 'Silvia', ''], dtype=object)
array(['López', 'José Alberto', ''], dtype=object)
array(['Galindo', 'Adolfo', ''], dtype=object)]
|
5,793 |
2209.06169
|
Kees Van Deemter
|
Kees van Deemter
|
The Role of Explanatory Value in Natural Language Processing
|
8 pages + bibliography
| null | null | null |
cs.CL
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
A key aim of science is explanation, yet the idea of explaining language
phenomena has taken a backseat in mainstream Natural Language Processing (NLP)
and many other areas of Artificial Intelligence. I argue that explanation of
linguistic behaviour should be a main goal of NLP, and that this is not the
same as making NLP models explainable. To illustrate these ideas, some recent
models of human language production are compared with each other. I conclude by
asking what it would mean for NLP research and institutional policies if our
community took explanatory value seriously, while heeding some possible
pitfalls.
|
[{'version': 'v1', 'created': 'Tue, 13 Sep 2022 17:19:04 GMT'}]
|
2022-09-14
|
[array(['van Deemter', 'Kees', ''], dtype=object)]
|
5,794 |
2303.05422
|
G\'abor B\'ir\'o
|
G\'abor B\'ir\'o, Gergely G\'abor Barnaf\"oldi
|
Machine Learning based KNO-scaling of charged hadron multiplicities with
Hijing++
|
Contribution to the 21st International Workshop on Advanced Computing
and Analysis Techniques in Physics Research, 23-28 October, 2022, Bari, Italy
| null | null | null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
The scaling properties of the final state charged hadron and mean jet
multiplicity distributions, calculated by deep residual neural network
architectures with different complexities are presented. The parton-level input
of the neural networks are generated by the Hijing++ Monte Carlo event
generator. Hadronization neural networks, trained with $\sqrt{s}=7$ TeV events
are utilized to perform predictions for various LHC energies from
$\sqrt{s}=0.9$ TeV to 13 TeV. KNO-scaling properties were adopted by the
networks at hadronic level.
|
[{'version': 'v1', 'created': 'Thu, 9 Mar 2023 17:14:20 GMT'}]
|
2023-03-10
|
[array(['Bíró', 'Gábor', ''], dtype=object)
array(['Barnaföldi', 'Gergely Gábor', ''], dtype=object)]
|
5,795 |
1911.04944
|
Holger Schwenk
|
Holger Schwenk, Guillaume Wenzek, Sergey Edunov, Edouard Grave, Armand
Joulin
|
CCMatrix: Mining Billions of High-Quality Parallel Sentences on the WEB
|
13 pages, 4 figures. arXiv admin note: text overlap with
arXiv:1907.05791
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that margin-based bitext mining in a multilingual sentence space can
be applied to monolingual corpora of billions of sentences. We are using ten
snapshots of a curated common crawl corpus (Wenzek et al., 2019) totalling 32.7
billion unique sentences. Using one unified approach for 38 languages, we were
able to mine 4.5 billions parallel sentences, out of which 661 million are
aligned with English. 20 language pairs have more then 30 million parallel
sentences, 112 more then 10 million, and most more than one million, including
direct alignments between many European or Asian languages.
To evaluate the quality of the mined bitexts, we train NMT systems for most
of the language pairs and evaluate them on TED, WMT and WAT test sets. Using
our mined bitexts only and no human translated parallel data, we achieve a new
state-of-the-art for a single system on the WMT'19 test set for translation
between English and German, Russian and Chinese, as well as German/French. In
particular, our English/German system outperforms the best single one by close
to 4 BLEU points and is almost on pair with best WMT'19 evaluation system which
uses system combination and back-translation. We also achieve excellent results
for distant languages pairs like Russian/Japanese, outperforming the best
submission at the 2019 workshop on Asian Translation (WAT).
|
[{'version': 'v1', 'created': 'Sun, 10 Nov 2019 12:09:46 GMT'}
{'version': 'v2', 'created': 'Fri, 1 May 2020 10:49:00 GMT'}]
|
2020-05-04
|
[array(['Schwenk', 'Holger', ''], dtype=object)
array(['Wenzek', 'Guillaume', ''], dtype=object)
array(['Edunov', 'Sergey', ''], dtype=object)
array(['Grave', 'Edouard', ''], dtype=object)
array(['Joulin', 'Armand', ''], dtype=object)]
|
5,796 |
1807.02408
|
Alexander Kyuregyan
|
A. S. Kyuregyan
|
Excitation of copper vapor lasers by direct discharge of storage
capacitor via the high-speed photothyristors
|
10 pages, in Russian, 8 figures
| null | null | null |
cond-mat.other
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The possibility of using an optocoupler "pulsed fiber laser - photo
thyristor" as a switch in excitation circuits of copper vapor lasers (CVL) is
investigated. It is shown that such switch has a nanosecond speed, is able to
pass monopolar or alternating current pulses through CVL with a power of up to
10 MW and a repetition rate of up to tens of kilohertz with an electric
efficiency of excitation circuit of more than 95%. A simple but very accurate
model of photo thyristor is proposed, which can be used in full-scale CVL
modeling programs.
|
[{'version': 'v1', 'created': 'Fri, 6 Jul 2018 13:45:48 GMT'}]
|
2018-07-09
|
[array(['Kyuregyan', 'A. S.', ''], dtype=object)]
|
5,797 |
gr-qc/0410014
|
Luis Herrera
|
L. Herrera and N.O. Santos
|
Dynamics of dissipative gravitational collapse
|
Some misprints in eqs.(38) and (39) corrected
|
Phys.Rev.D70:084004,2004
|
10.1103/PhysRevD.70.084004
| null |
gr-qc astro-ph physics.space-ph
| null |
The Misner and Sharp approach to the study of gravitational collapse is
extended to the dissipative case in, both, the streaming out and the diffusion
approximations. The role of different terms in the dynamical equation are
analyzed in detail. The dynamical equation is then coupled to a causal
transport equation in the context of Israel--Stewart theory. The decreasing of
the inertial mass density of the fluid, by a factor which depends on its
internal thermodynamics state, is reobtained, at any time scale. In accordance
with the equivalence principle, the same decreasing factor is obtained for the
gravitational force term. Prospective applications of this result to some
astrophysical scenarios are discussed.
|
[{'version': 'v1', 'created': 'Mon, 4 Oct 2004 13:40:25 GMT'}
{'version': 'v2', 'created': 'Tue, 2 Nov 2004 20:46:12 GMT'}]
|
2008-11-26
|
[array(['Herrera', 'L.', ''], dtype=object)
array(['Santos', 'N. O.', ''], dtype=object)]
|
5,798 |
0910.4999
|
Vesna Zupanovic
|
Neven Elezovi\'c, Vesna \v{Z}upanovi\'c, and Darko \v{Z}ubrini\'c
|
Box dimension of trajectories of some discrete dynamical systems
|
12 pages
|
Chaos, Solitons & Fractals, Vol. 34, 2 (2007), 244-252
| null | null |
math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the asymptotics, box dimension, and Minkowski content of
trajectories of some discrete dynamical systems. We show that under very
general conditions, trajectories corresponding to parameters where saddle-node
bifurcation appears have box dimension equal to 1/2, while those corresponding
to period-doubling bifurcation parameter have box dimension equal to 2/3.
Furthermore, all these trajectories are Minkowski nondegenerate. The results
are illustrated in the case of logistic map.
|
[{'version': 'v1', 'created': 'Mon, 26 Oct 2009 22:26:27 GMT'}]
|
2009-10-28
|
[array(['Elezović', 'Neven', ''], dtype=object)
array(['Županović', 'Vesna', ''], dtype=object)
array(['Žubrinić', 'Darko', ''], dtype=object)]
|
5,799 |
1009.5710
|
Rosario Lo Franco
|
Rosario Lo Franco, Bruno Bellomo, Erika Andersson and Giuseppe
Compagno
|
Revival of quantum correlations without system-environment back-action
|
8 pages, 4 figures; this version to appear in Phys. Rev. A
|
Phys. Rev. A 85, 032318 (2012)
|
10.1103/PhysRevA.85.032318
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Revivals of quantum correlations have often been explained in terms of
back-action on quantum systems by their quantum environment(s). Here we
consider a system of two independently evolving qubits, each locally
interacting with a classical random external field. The environments of the
qubits are also independent, and there is no back-action on the qubits.
Nevertheless, entanglement, quantum discord and classical correlations between
the two qubits may revive in this model. We explain the revivals in terms of
correlations in a classical-quantum state of the environments and the qubits.
Although classical states cannot store entanglement on their own, they can play
a role in storing and reviving entanglement. It is important to know how the
absence of back-action, or modelling an environment as classical, affects the
kind of system time evolutions one is able to describe. We find a class of
global time evolutions where back-action is absent and for which there is no
loss of generality in modelling the environment as classical. Finally, we show
that the revivals can be connected with the increase of a parameter used to
quantify non-Markovianity of the single-qubit dynamics.
|
[{'version': 'v1', 'created': 'Tue, 28 Sep 2010 22:01:08 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Apr 2011 12:39:41 GMT'}
{'version': 'v3', 'created': 'Mon, 5 Mar 2012 11:23:14 GMT'}
{'version': 'v4', 'created': 'Tue, 6 Mar 2012 11:27:00 GMT'}]
|
2012-03-19
|
[array(['Franco', 'Rosario Lo', ''], dtype=object)
array(['Bellomo', 'Bruno', ''], dtype=object)
array(['Andersson', 'Erika', ''], dtype=object)
array(['Compagno', 'Giuseppe', ''], dtype=object)]
|
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