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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2,500 |
0906.0304
|
Luis Manuel Sarro
|
L. M. Sarro, J. Debosscher, C. Aerts and M. L\'opez
|
Comparative clustering analysis of variable stars in the Hipparcos, OGLE
Large Magellanic Cloud and CoRoT exoplanet databases
|
Accepted for publication is Astronomy and Astrophysics. Official
acceptance date: May 18th, 2009 49 pages including online material (main
article in 16 pages). 51 figures in total
| null |
10.1051/0004-6361/200912009
| null |
astro-ph.SR astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Context. Discovery of new variability classes in large surveys using
multivariate statistics techniques such as clustering, relies heavily on the
correct understanding of the distribution of known classes as point processes
in parameter space. Aims. Our objective is to analyze the correspondence
between the classical stellar variability types and the clusters found in the
distribution of light curve parameters and colour indices of stars in the CoRoT
exoplanet sample. The final aim is to help in the identification on new types
of variability by first identifying the well known variables in the CoRoT
sample. Methods. We apply unsupervised classification algorithms to identify
clusters of variable stars from modes of the probability density distribution.
We use reference variability databases (Hipparcos and OGLE) as a framework to
calibrate the clustering methodology. Furthermore, we use the results from
supervised classification methods to interpret the resulting clusters.
Results.We interpret the clusters in the Hipparcos and OGLE LMC databases in
terms of large-amplitude radial pulsators in the classical instability strip
and of various types of eclipsing binaries. The Hipparcos data also provide
clear distributions for low-amplitude nonradial pulsators. We show that the
preselection of targets for the CoRoT exoplanet programme results in a
completely different probability density landscape than the OGLE data, the
interpretation of which involves mainly classes of low-amplitude variability in
main-sequence stars. Our findings will be incorporated to improve the
supervised classification used in the CoRoT catalogue production, once the
existence of new classes or subtypes will be confirmed from complementary
spectroscopic observations.
|
[{'version': 'v1', 'created': 'Mon, 1 Jun 2009 14:57:00 GMT'}]
|
2015-05-13
|
[array(['Sarro', 'L. M.', ''], dtype=object)
array(['Debosscher', 'J.', ''], dtype=object)
array(['Aerts', 'C.', ''], dtype=object)
array(['López', 'M.', ''], dtype=object)]
|
2,501 |
1203.5773
|
Gavin Salam
|
Andrea Banfi, Gavin P. Salam and Giulia Zanderighi
|
NLL+NNLO predictions for jet-veto efficiencies in Higgs-boson and
Drell-Yan production
|
30 pages, 8 figures; v2 as published in JHEP
|
JHEP 1206 (2012) 159
|
10.1007/JHEP06(2012)159
|
CERN-PH-TH/2012-065; LPN12-043; OUTP-12-04P
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using the technology of the CAESAR approach to resummation, we examine the
jet-veto efficiency in Higgs-boson and Drell-Yan production at hadron colliders
and show that at next-to-leading logarithmic (NLL) accuracy the resummation
reduces to just a Sudakov form factor. Matching with NNLO calculations results
in stable predictions for the case of Drell-Yan production, but reveals
substantial uncertainties in gluon-fusion Higgs production, connected in part
with the poor behaviour of the perturbative series for the total cross section.
We compare our results to those from POWHEG with and without reweighting by
HqT, as used experimentally, and observe acceptable agreement. In an appendix
we derive the part of the NNLL resummation corrections associated with the
radius dependence of the jet algorithm.
|
[{'version': 'v1', 'created': 'Mon, 26 Mar 2012 19:45:09 GMT'}
{'version': 'v2', 'created': 'Sat, 18 Aug 2012 08:21:19 GMT'}]
|
2015-06-04
|
[array(['Banfi', 'Andrea', ''], dtype=object)
array(['Salam', 'Gavin P.', ''], dtype=object)
array(['Zanderighi', 'Giulia', ''], dtype=object)]
|
2,502 |
1601.03963
|
Stephan Mescher
|
Stephan Mescher
|
A primer on A-infinity-algebras and their Hochschild homology
|
60 pages. Comments welcome
| null | null | null |
math.RA math.GT math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an elementary and self-contained construction of
$A_\infty$-algebras, $A_\infty$-bimodules and their Hochschild homology and
cohomology groups. In addition, we discuss the cup product in Hochschild
cohomology and the spectral sequence of the length filtration of a Hochschild
chain complex.
$A_\infty$-structures arise naturally in the study of based loop spaces and
the geometry of manifolds, in particular in Lagrangian Floer theory and Morse
homology. In several geometric situations, Hochschild homology may be used to
describe homology groups of free loop spaces.
The objective of this article is not to introduce new material, but to give a
unified and coherent discussion of algebraic results from several sources. It
further includes detailed proofs of all presented results.
|
[{'version': 'v1', 'created': 'Fri, 15 Jan 2016 15:35:41 GMT'}]
|
2016-01-26
|
[array(['Mescher', 'Stephan', ''], dtype=object)]
|
2,503 |
1904.08295
|
Colin Philip Johnstone
|
C. P. Johnstone, E. Pilat-Lohinger, T. L\"uftinger, M. G\"udel, A.
St\"okl
|
Stellar activity and planetary atmosphere evolution in tight binary star
systems
|
Accepted for publication by A&A
| null |
10.1051/0004-6361/201832805
| null |
astro-ph.SR astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Context. In tight binary star systems, tidal interactions can significantly
influence the rotational and orbital evolution of both stars, and therefore
their activity evolution. This can have strong effects on the atmospheric
evolution of planets that are orbiting the two stars.
Aims. In this paper, we aim to study the evolution of stellar rotation and of
X-ray and ultraviolet (XUV) radiation in tight binary systems consisting of two
solar mass stars and use our results to study planetary atmosphere evolution in
the habitable zones of these systems.
Methods. We have applied a rotation model developed for single stars to
binary systems, taking into account the effects of tidal interactions on the
rotational and orbital evolution of both stars. We used empirical
rotation-activity relations to predict XUV evolution tracks for the stars,
which we used to model hydrodynamic escape of hydrogen dominated atmospheres.
Results. When significant, tidal interactions increase the total amount of
XUV energy emitted, and in the most extreme cases by up to factor of $\sim$50.
We find that in the systems that we study, habitable zone planets with masses
of 1~M$_\oplus$ can lose huge hydrogen atmospheres due to the extended high
levels of XUV emission, and the time that is needed to lose these atmospheres
depends on the binary orbital separation.For some orbital separations, and when
the stars are born as rapid rotators, it is also possible for tidal
interactions to protect atmospheres from erosion by quickly spinning down the
stars. For very small orbital separations, the loss of orbital angular momentum
by stellar winds causes the two stars to merge. We suggest that the merging of
the two stars could cause previously frozen planets to become habitable due to
the habitable zone boundaries moving outwards.
|
[{'version': 'v1', 'created': 'Wed, 17 Apr 2019 14:47:04 GMT'}]
|
2019-06-12
|
[array(['Johnstone', 'C. P.', ''], dtype=object)
array(['Pilat-Lohinger', 'E.', ''], dtype=object)
array(['Lüftinger', 'T.', ''], dtype=object)
array(['Güdel', 'M.', ''], dtype=object)
array(['Stökl', 'A.', ''], dtype=object)]
|
2,504 |
1711.02007
|
Yizheng Zhu
|
Yizheng Zhu
|
The internal structure of $\mathrm{HOD}^{L[x]}$ up to its Woodin
|
withdrawn due to a mistake in Lemma 6.2
| null | null | null |
math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Assume $\boldsymbol{\Delta}^1_3$-determinacy. It is shown that for any $x
\geq_T M_1^{\#}$, $\mathrm{HOD}^{L[x]}$ is a model of GCH, and in fact, it is a
Jensen-Steel core model up to $\omega_2^{L[x]}$.
|
[{'version': 'v1', 'created': 'Mon, 6 Nov 2017 16:47:21 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Nov 2017 13:04:09 GMT'}]
|
2017-11-09
|
[array(['Zhu', 'Yizheng', ''], dtype=object)]
|
2,505 |
1810.11505
|
Ming Jin
|
Ming Jin and Javad Lavaei
|
Stability-certified reinforcement learning: A control-theoretic
perspective
| null | null | null | null |
cs.SY cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the important problem of certifying stability of reinforcement
learning policies when interconnected with nonlinear dynamical systems. We show
that by regulating the input-output gradients of policies, strong guarantees of
robust stability can be obtained based on a proposed semidefinite programming
feasibility problem. The method is able to certify a large set of stabilizing
controllers by exploiting problem-specific structures; furthermore, we analyze
and establish its (non)conservatism. Empirical evaluations on two decentralized
control tasks, namely multi-flight formation and power system frequency
regulation, demonstrate that the reinforcement learning agents can have high
performance within the stability-certified parameter space, and also exhibit
stable learning behaviors in the long run.
|
[{'version': 'v1', 'created': 'Fri, 26 Oct 2018 18:57:35 GMT'}]
|
2018-10-30
|
[array(['Jin', 'Ming', ''], dtype=object)
array(['Lavaei', 'Javad', ''], dtype=object)]
|
2,506 |
1901.04704
|
Zhi-Hong Deng
|
Zhi-Hong Deng, Ling Huang, Chang-Dong Wang, Jian-Huang Lai, Philip S.
Yu
|
DeepCF: A Unified Framework of Representation Learning and Matching
Function Learning in Recommender System
| null | null | null | null |
cs.LG cs.IR stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In general, recommendation can be viewed as a matching problem, i.e., match
proper items for proper users. However, due to the huge semantic gap between
users and items, it's almost impossible to directly match users and items in
their initial representation spaces. To solve this problem, many methods have
been studied, which can be generally categorized into two types, i.e.,
representation learning-based CF methods and matching function learning-based
CF methods. Representation learning-based CF methods try to map users and items
into a common representation space. In this case, the higher similarity between
a user and an item in that space implies they match better. Matching function
learning-based CF methods try to directly learn the complex matching function
that maps user-item pairs to matching scores. Although both methods are well
developed, they suffer from two fundamental flaws, i.e., the limited
expressiveness of dot product and the weakness in capturing low-rank relations
respectively. To this end, we propose a general framework named DeepCF, short
for Deep Collaborative Filtering, to combine the strengths of the two types of
methods and overcome such flaws. Extensive experiments on four publicly
available datasets demonstrate the effectiveness of the proposed DeepCF
framework.
|
[{'version': 'v1', 'created': 'Tue, 15 Jan 2019 08:25:00 GMT'}]
|
2019-01-16
|
[array(['Deng', 'Zhi-Hong', ''], dtype=object)
array(['Huang', 'Ling', ''], dtype=object)
array(['Wang', 'Chang-Dong', ''], dtype=object)
array(['Lai', 'Jian-Huang', ''], dtype=object)
array(['Yu', 'Philip S.', ''], dtype=object)]
|
2,507 |
2002.04364
|
Stefan Haller
|
Stefan Haller and Cornelia Vizman
|
Nonlinear flag manifolds as coadjoint orbits
| null |
Ann. Global Anal. Geom. 58(2020), 385-413
|
10.1007/s10455-020-09725-6
| null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A nonlinear flag is a finite sequence of nested closed submanifolds. We study
the geometry of Frechet manifolds of nonlinear flags, in this way generalizing
the nonlinear Grassmannians. As an application we describe a class of coadjoint
orbits of the group of Hamiltonian diffeomorphisms that consist of nested
symplectic submanifolds, i.e., symplectic nonlinear flags.
|
[{'version': 'v1', 'created': 'Tue, 11 Feb 2020 13:18:49 GMT'}]
|
2021-09-06
|
[array(['Haller', 'Stefan', ''], dtype=object)
array(['Vizman', 'Cornelia', ''], dtype=object)]
|
2,508 |
1908.01171
|
Mikhail Zhitlukhin
|
Yaroslav Drokin, Mikhail Zhitlukhin
|
Relative growth optimal strategies in an asset market game
|
16 pages. Published in "Annals of Finance"
| null |
10.1007/s10436-020-00360-6
| null |
q-fin.MF
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a game-theoretic model of a market where investors compete for
payoffs yielded by several assets. The main result consists in a proof of the
existence and uniqueness of a strategy, called relative growth optimal, such
that the logarithm of the share of its wealth in the total wealth of the market
is a submartingale for any strategies of the other investors. It is also shown
that this strategy is asymptotically optimal in the sense that it achieves the
maximal capital growth rate when compared to competing strategies. Based on the
results obtained, we study the asymptotic structure of the market when all the
investors use the relative growth optimal strategy.
|
[{'version': 'v1', 'created': 'Sat, 3 Aug 2019 13:33:44 GMT'}
{'version': 'v2', 'created': 'Thu, 23 Jul 2020 13:58:31 GMT'}]
|
2020-07-24
|
[array(['Drokin', 'Yaroslav', ''], dtype=object)
array(['Zhitlukhin', 'Mikhail', ''], dtype=object)]
|
2,509 |
1706.08995
|
Mladen Savov
|
Pierre Patie, Mladen Savov, Yixuan Zhao
|
Intertwining, Excursion Theory and Krein Theory of Strings for
Non-self-adjoint Markov Semigroups
| null |
Ann. Probab. 47, no. 5, 3231-3277, 2019
| null | null |
math.PR math.FA math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we start by showing that the intertwining relationship between
two minimal Markov semigroups acting on Hilbert spaces implies that any
recurrent extensions, in the sense of It\^o, of these semigroups satisfy the
same intertwining identity. Under mild additional assumptions on the
intertwining operator, we prove that the converse also holds. This connection,
which relies on the representation of excursion quantities as developed by
Fitzsimmons and Getoor, enables us to give an interesting probabilistic
interpretation of intertwining relationships between Markov semigroups via
excursion theory: two such recurrent extensions that intertwine share, under an
appropriate normalization, the same local time at the boundary point. Moreover,
in the case when one of the (non-self-adjoint) semigroup intertwines with the
one of a quasi-diffusion, we obtain an extension of Krein's theory of strings
byshowing that its densely defined spectral measure is absolutely continuous
with respect to the measure appearing in the Stieltjes representation of the
Laplace exponent of the inverse local time. Finally, we illustrate our results
with the class of positive self-similar Markov semigroups and also the
reflected generalized Laguerre semigroups. For the latter, we obtain their
spectral decomposition and provide, under some conditions, a perturbed spectral
gap estimate for its convergence to equilibrium.
|
[{'version': 'v1', 'created': 'Tue, 27 Jun 2017 18:19:26 GMT'}]
|
2022-05-24
|
[array(['Patie', 'Pierre', ''], dtype=object)
array(['Savov', 'Mladen', ''], dtype=object)
array(['Zhao', 'Yixuan', ''], dtype=object)]
|
2,510 |
2002.07558
|
Denis Kuperberg
|
Denis Kuperberg, Jan Martens
|
Regular resynchronizability of origin transducers is undecidable
| null | null | null | null |
cs.FL
|
http://creativecommons.org/licenses/by/4.0/
|
We study the relation of containment up to unknown regular resynchronization
between two-way non-deterministic transducers. We show that it constitutes a
preorder, and that the corresponding equivalence relation is properly
intermediate between origin equivalence and classical equivalence. We give a
syntactical characterization for containment of two transducers up to
resynchronization, and use it to show that this containment relation is
undecidable already for one-way non-deterministic transducers, and for simple
classes of resynchronizations. This answers the open problem stated in recent
works, asking whether this relation is decidable for two-way non-deterministic
transducers.
|
[{'version': 'v1', 'created': 'Tue, 18 Feb 2020 13:51:49 GMT'}
{'version': 'v2', 'created': 'Mon, 4 May 2020 19:07:04 GMT'}
{'version': 'v3', 'created': 'Wed, 1 Jul 2020 14:13:19 GMT'}]
|
2020-07-02
|
[array(['Kuperberg', 'Denis', ''], dtype=object)
array(['Martens', 'Jan', ''], dtype=object)]
|
2,511 |
2210.11337
|
Ilja Jaroschewski
|
Ilja Jaroschewski, Julia Becker Tjus, Peter L. Biermann
|
Extragalactic neutrino emission induced by Supermassive and Stellar Mass
Black Hole mergers
| null | null |
10.1093/mnras/stac3402
| null |
astro-ph.HE astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The recent detections of binary stellar mass black hole mergers by the LIGO
and Virgo Collaborations suggest that such mergers are common occurrences.
Galaxy mergers further indicate that supermassive black holes in centers of
galaxies also merge and are typically expected to have had at least one merger
in their lifetime, possibly many. In the presence of a jet, these mergers are
almost always accompanied by a change of the jet direction and a connected jet
precession motion, leading to interactions of the jet with ambient matter and
producing very high-energy particles, and consequently high-energy gamma-rays
and neutrinos. In this work, we investigate the possibility under which
conditions such mergers could be the sources of the diffuse astrophysical
neutrino flux measured by the IceCube Neutrino Observatory. The main free
parameters in the calculation concern the frequency of the mergers and the
fraction of energy that is transferred from the gravitationally released energy
to neutrinos. We show that the merger rate for SMBBHs must lie between $\sim
10^{-7}$ and $10^{-5}$ Gpc$^{-3}$ yr$^{-1}$. The ratio of energy going to
neutrinos during such mergers lies then between $\sim 10^{-6} - 3\cdot
10^{-4}$. For stellar mass BBH mergers, the rate needs to be $\sim 10-100$
Gpc$^{-3}$ yr$^{-1}$ and the expected ratio of neutrino to gravitational wave
energy lies in a comparable range as for SMBBHs, $\sim 2 \cdot 10^{-5} -
10^{-3}$. These values lie in a reasonable parameter range, so that the
production of neutrinos at the level of the detected neutrino flux is a
realistic possibility.
|
[{'version': 'v1', 'created': 'Thu, 20 Oct 2022 15:17:34 GMT'}]
|
2022-12-07
|
[array(['Jaroschewski', 'Ilja', ''], dtype=object)
array(['Tjus', 'Julia Becker', ''], dtype=object)
array(['Biermann', 'Peter L.', ''], dtype=object)]
|
2,512 |
1811.03464
|
Chi-Ju Wu
|
C.-J. Wu, N. A. Krivova, S. K. Solanki, I. G. Usoskin
|
Solar total and spectral irradiance reconstruction over the last 9000
years
| null | null |
10.1051/0004-6361/201832956
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Changes in solar irradiance and in its spectral distribution are among the
main natural drivers of the climate on Earth. However, irradiance measurements
are only available for less than four decades, while assessment of solar
influence on Earth requires much longer records. The aim of this work is to
provide the most up-to-date physics-based reconstruction of the solar total and
spectral irradiance (TSI/SSI) over the last nine millennia. The concentrations
of the cosmogenic isotopes 14C and 10Be in natural archives have been converted
to decadally averaged sunspot numbers through a chain of physics-based models.
TSI and SSI are reconstructed with an updated SATIRE model. Reconstructions are
carried out for each isotope record separately, as well as for their composite.
We present the first ever SSI reconstruction over the last 9000 years from the
individual 14C and 10Be records as well as from their newest composite. The
reconstruction employs physics-based models to describe the involved processes
at each step of the procedure. Irradiance reconstructions based on two
different cosmogenic isotope records, those of 14C and 10Be, agree well with
each other in their long-term trends despite their different geochemical paths
in the atmosphere of Earth. Over the last 9000 years, the reconstructed secular
variability in TSI is of the order of 0.11%, or 1.5 W/m2. After the Maunder
minimum, the reconstruction from the cosmogenic isotopes is consistent with
that from the direct sunspot number observation. Furthermore, over the
nineteenth century, the agreement of irradiance reconstructions using isotope
records with the reconstruction from the sunspot number by Chatzistergos et al.
(2017) is better than that with the reconstruction from the WDC-SILSO series
(Clette et al. 2014), with a lower chi-square-value.
|
[{'version': 'v1', 'created': 'Thu, 8 Nov 2018 14:45:19 GMT'}]
|
2018-11-09
|
[array(['Wu', 'C. -J.', ''], dtype=object)
array(['Krivova', 'N. A.', ''], dtype=object)
array(['Solanki', 'S. K.', ''], dtype=object)
array(['Usoskin', 'I. G.', ''], dtype=object)]
|
2,513 |
2304.05433
|
Shilin Liu
|
Shilin Liu and Clark McGrew
|
Binned Likelihood including Monte Carlo Statistical Uncertainty in
Bayesian Inference
| null | null | null | null |
hep-ex physics.data-an
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Data analysis in HEP experiments often uses binned likelihood from data and
finite Monte Carlo sample. Statistical uncertainty of Monte Carlo sample has
been introduced in Frequentist Inference in some literatures, but they are not
suitable for Bayesian Inference. This technical note introduces the binned
likelihood with Monte Carlo statistical uncertainty in Bayesian Inference and
includes the derivation of it. It turns out that the results are similar to the
results in [1]. But this tech-note gives an alternate and more intuitive
derivation of the content
|
[{'version': 'v1', 'created': 'Tue, 11 Apr 2023 18:05:51 GMT'}]
|
2023-04-13
|
[array(['Liu', 'Shilin', ''], dtype=object)
array(['McGrew', 'Clark', ''], dtype=object)]
|
2,514 |
1404.5910
|
Yi Yin
|
Mikhail Stephanov and Yi Yin
|
Reversing a heavy-ion collision
|
10 pages, 6 figures
| null | null |
EFI-14-9
|
nucl-th hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a novel approach to study the longitudinal hydrodynamic
expansion of the quark-gluon fluid created in heavy-ion collisions. It consists
of two steps: First, we apply the maximum entropy method to reconstruct the
freeze-out surface from experimentally measured particle distribution. We then
take the output of the reconstruction as the "initial" condition to evolve the
system back in time by solving the 1+1 ideal hydrodynamic equations
analytically, using the method of Khalatnikov and Landau. We find an
approximate Bjorken-like plateau in the energy density vs rapidity profile at
the early times, which shrinks with time as the boundary shocks propagate
inward. In Bjorken frame, the fluid velocity is close to zero within the
plateau, as in the Bjorken solution, but increases outside the plateau. The
results carry implications for fully numerical hydrodynamic simulations as well
as models of heavy-ion collisions based on gauge-gravity duality.
|
[{'version': 'v1', 'created': 'Wed, 23 Apr 2014 17:48:50 GMT'}]
|
2014-04-24
|
[array(['Stephanov', 'Mikhail', ''], dtype=object)
array(['Yin', 'Yi', ''], dtype=object)]
|
2,515 |
gr-qc/0310071
|
Steven G. Harris
|
Steven G. Harris
|
Discrete Group Actions on Spacetimes: Causality Conditions and the
Causal Boundary
|
32 pages
|
Class.Quant.Grav. 21 (2004) 1209-1236
|
10.1088/0264-9381/21/4/032
| null |
gr-qc
| null |
Suppose a spacetime $M$ is a quotient of a spacetime $V$ by a discrete group
of isometries. It is shown how causality conditions in the two spacetimes are
related, and how can one learn about the future causal boundary on $M$ by
studying structures in $V$. The relations between the two are particularly
simple (the boundary of the quotient is the quotient of the boundary) if both
$V$ and $M$ have spacelike future boundaries and if it is known that the
quotient of the future completion of $V$ is past-distinguishing. (That last
assumption is automatic in the case of $M$ being multi-warped.)
|
[{'version': 'v1', 'created': 'Tue, 14 Oct 2003 13:32:11 GMT'}]
|
2009-11-10
|
[array(['Harris', 'Steven G.', ''], dtype=object)]
|
2,516 |
2209.14683
|
Farshid Jafarpour
|
Ya\"ir Hein and Farshid Jafarpour
|
Asymptotic decoupling of population growth rate and cell size
distribution
| null | null | null | null |
q-bio.PE
|
http://creativecommons.org/licenses/by/4.0/
|
The rate at which individual bacterial cells grow depends on the
concentrations of cellular components such as ribosomes and proteins. These
concentrations continuously fluctuate over time and are inherited from mother
to daughter cells leading to correlations between the growth rates of cells
across generations. Division sizes of cells are also stochastic and correlated
across generations due to a phenomenon known as cell size regulation.
Fluctuations and correlations from both growth and division processes affect
the population dynamics of an exponentially growing culture. Here, we provide
analytic solutions for the population dynamics of cells with continuously
fluctuating growth rates coupled with a generic model of cell-size regulation.
We show that in balanced growth, the effects of growth and division processes
decouple; the population growth rate only depends on the single-cell growth
rate process, and the population cell size distribution only depends on the
model of division and cell size regulation. The population growth rate is
always higher than the average single-cell growth rate, and the difference
increases with growth rate variability and its correlation time. This
difference also sets the timescale for the population to reach its steady
state. We provide analytical solutions for oscillations in population growth
rate and traveling waves in size distribution during this approach to the
steady state.
|
[{'version': 'v1', 'created': 'Thu, 29 Sep 2022 11:01:32 GMT'}]
|
2022-09-30
|
[array(['Hein', 'Yaïr', ''], dtype=object)
array(['Jafarpour', 'Farshid', ''], dtype=object)]
|
2,517 |
1709.07086
|
Tanise Carnieri Pierin
|
Diane Castonguay, Edson Ribeiro Alvares, Patrick Le Meur, Tanise
Carnieri Pierin
|
(m,n)-Quasitilted and (m,n)-Almost Hereditary Algebras
|
15 pages
| null | null | null |
math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motivated by the study of (m,n)-quasitilted algebras, which are the piecewise
hereditary algebras obtained from quasitilted algebras of global dimension two
by a sequence of (co)tiltings involving n-1 tilting modules and m-1 cotilting
modules, we introduce (m,n)-almost hereditary algebras. These are the algebras
with global dimension m+n and such that any indecomposable module has
projective dimension at most m, or else injective dimension at most n. We
relate these two classes of algebras, among which (m,1)-almost hereditary ones
play a special role. For these, we prove that any indecomposable module lies in
the right part of the module category, or else in an m-analog of the left part.
This is based on the more general study of algebras the module categories of
which admit a torsion-free subcategory such that any indecomposable module lies
in that subcategory, or else has injective dimension at most n.
|
[{'version': 'v1', 'created': 'Wed, 20 Sep 2017 21:16:37 GMT'}]
|
2017-09-22
|
[array(['Castonguay', 'Diane', ''], dtype=object)
array(['Alvares', 'Edson Ribeiro', ''], dtype=object)
array(['Meur', 'Patrick Le', ''], dtype=object)
array(['Pierin', 'Tanise Carnieri', ''], dtype=object)]
|
2,518 |
1105.2356
|
Alan Coley
|
A A Coley and S Hervik
|
Universality and constant scalar curvature invariants
| null | null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A classical solution is called universal if the quantum correction is a
multiple of the metric. Universal solutions consequently play an important role
in the quantum theory. We show that in a spacetime which is universal all of
the scalar curvature invariants are constant (i.e., the spacetime is CSI).
|
[{'version': 'v1', 'created': 'Thu, 12 May 2011 02:10:38 GMT'}]
|
2011-05-13
|
[array(['Coley', 'A A', ''], dtype=object)
array(['Hervik', 'S', ''], dtype=object)]
|
2,519 |
1705.05148
|
George Alexandropoulos
|
George C. Alexandropoulos and Melissa Duarte
|
Joint Design of Multi-Tap Analog Cancellation and Digital Beamforming
for Reduced Complexity Full Duplex MIMO Systems
|
8 pages, 4 figures, IEEE ICC 2017
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Incorporating full duplex operation in Multiple Input Multiple Output (MIMO)
systems provides the potential of boosting throughput performance. However, the
hardware complexity of the analog self-interference canceller scales with the
number of transmit and receive antennas, thus exploiting the benefits of analog
cancellation becomes impractical for full duplex MIMO transceivers. In this
paper, we present a novel architecture for the analog canceller comprising of
reduced number of taps (tap refers to a line of fixed delay and variable phase
shifter and attenuator) and simple multiplexers for efficient signal routing
among the transmit and receive radio frequency chains. In contrast to the
available analog cancellation architectures, the values for each tap and the
configuration of the multiplexers are jointly designed with the digital
beamforming filters according to certain performance objectives. Focusing on a
narrowband flat fading channel model as an example, we present a general
optimization framework for the joint design of analog cancellation and digital
beamforming. We also detail a particular optimization objective together with
its derived solution for the latter architectural components. Representative
computer simulation results demonstrate the superiority of the proposed low
complexity full duplex MIMO system over lately available ones.
|
[{'version': 'v1', 'created': 'Mon, 15 May 2017 10:26:43 GMT'}]
|
2017-05-16
|
[array(['Alexandropoulos', 'George C.', ''], dtype=object)
array(['Duarte', 'Melissa', ''], dtype=object)]
|
2,520 |
2007.07022
|
Giovanni Colavizza
|
Harshdeep Singh, Robert West, Giovanni Colavizza
|
Wikipedia Citations: A comprehensive dataset of citations with
identifiers extracted from English Wikipedia
| null | null | null | null |
cs.DL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Wikipedia's contents are based on reliable and published sources. To this
date, relatively little is known about what sources Wikipedia relies on, in
part because extracting citations and identifying cited sources is challenging.
To close this gap, we release Wikipedia Citations, a comprehensive dataset of
citations extracted from Wikipedia. A total of 29.3M citations were extracted
from 6.1M English Wikipedia articles as of May 2020, and classified as being to
books, journal articles or Web contents. We were thus able to extract 4.0M
citations to scholarly publications with known identifiers -- including DOI,
PMC, PMID, and ISBN -- and further equip an extra 261K citations with DOIs from
Crossref. As a result, we find that 6.7% of Wikipedia articles cite at least
one journal article with an associated DOI, and that Wikipedia cites just 2% of
all articles with a DOI currently indexed in the Web of Science. We release our
code to allow the community to extend upon our work and update the dataset in
the future.
|
[{'version': 'v1', 'created': 'Tue, 14 Jul 2020 13:30:25 GMT'}
{'version': 'v2', 'created': 'Mon, 23 Nov 2020 11:13:46 GMT'}]
|
2020-11-24
|
[array(['Singh', 'Harshdeep', ''], dtype=object)
array(['West', 'Robert', ''], dtype=object)
array(['Colavizza', 'Giovanni', ''], dtype=object)]
|
2,521 |
quant-ph/0301060
|
Wang Kaige
|
Kaige Wang
|
Coalescence and Anti-Coalescence Interference of Two-Photon Wavepacket
in a Beam Splitter
|
5 pages, 2 figures
| null |
10.1088/0256-307X/21/2/024
| null |
quant-ph
| null |
We study a general theory on the interference of two-photon wavepacket in a
beam splitter (BS). We find that the perfect coalescence interference requires
a symmetric spectrum of two-photon wavepacket which can be entangled or
un-entangled. Furthermore, we introduce a two-photon wavepacket with
anti-symmetric spectrum, which is related with photon entanglement and shows a
perfect anti-coalescence effect. The theory present uniform and complete
explanation to two-photon interference.
|
[{'version': 'v1', 'created': 'Tue, 14 Jan 2003 15:21:08 GMT'}]
|
2009-11-10
|
[array(['Wang', 'Kaige', ''], dtype=object)]
|
2,522 |
cond-mat/0602222
|
Jong-Bong Lee
|
Jong-Bong Lee, Dmitri Konovalov, Robert B. Meyer
|
Textural transformations in islands on free standing Smectic C* liquid
crystal films
|
15 pages, 8 figures
| null |
10.1103/PhysRevE.73.051705
| null |
cond-mat.soft
| null |
We report on and analyze the textural transformations in islands, thicker
circular domains, floating in very thin free standing chiral Smectic C* liquid
crystal films. As an island is growing, an initial pure bend texture of the
c-director changes into a reversing spiral at a critical size. Another distinct
spiral texture is induced by changing the boundary condition at the central
point defect in the island. To understand these transformations from a pure
bend island, a linear stability analysis of the c-director free energy is
developed, which predicts a state diagram for the island. Our observations are
consistent with the theoretical phase diagram.
|
[{'version': 'v1', 'created': 'Wed, 8 Feb 2006 23:31:38 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Mar 2006 17:59:00 GMT'}]
|
2009-11-11
|
[array(['Lee', 'Jong-Bong', ''], dtype=object)
array(['Konovalov', 'Dmitri', ''], dtype=object)
array(['Meyer', 'Robert B.', ''], dtype=object)]
|
2,523 |
0907.0219
|
Andres Anabalon
|
Andres Anabalon, Hideki Maeda
|
New Charged Black Holes with Conformal Scalar Hair
|
Published version
|
Phys.Rev. D81 (2010) 041501
|
10.1103/PhysRevD.81.041501
|
AEI-2009-059; CECS-PHY-09/05
|
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A new class of four-dimensional, hairy, stationary solutions of the
Einstein-Maxwell-Lambda system with a conformally coupled scalar field is
constructed in this paper. The metric belongs to the Plebanski-Demianski family
and hence its static limit has the form of the charged C-metric. It is shown
that, in the static case, a new family of hairy black holes arises. They turn
out to be cohomogeneity-two, with horizons that are neither Einstein nor
homogenous manifolds. The conical singularities in the C-metric can be removed
due to the back reaction of the scalar field providing a new kind of regular,
radiative spacetime. The scalar field carries a continuous parameter
proportional to the usual acceleration present in the C-metric. In the
zero-acceleration limit, the static solution reduces to the dyonic
Bocharova-Bronnikov-Melnikov-Bekenstein solution or the dyonic extension of the
Martinez-Troncoso-Zanelli black holes, depending on the value of the
cosmological constant.
|
[{'version': 'v1', 'created': 'Wed, 1 Jul 2009 18:35:33 GMT'}
{'version': 'v2', 'created': 'Fri, 21 Aug 2009 17:14:41 GMT'}
{'version': 'v3', 'created': 'Mon, 24 Aug 2009 06:31:17 GMT'}
{'version': 'v4', 'created': 'Fri, 12 Feb 2010 15:42:34 GMT'}]
|
2015-05-13
|
[array(['Anabalon', 'Andres', ''], dtype=object)
array(['Maeda', 'Hideki', ''], dtype=object)]
|
2,524 |
2306.07807
|
Michael Raymer
|
Michael G. Raymer and Paul Polakos
|
States, Modes, Fields, and Photons in Quantum Optics
|
This article belongs to the special issue of Acta Physica Polonica A
printed in honor of Professor Iwo Bialynicki-Birula on the occasion of his
90th birthday (Ed. Tomasz Sowinski, DOI:10.12693/APhysPolA.143.S0)
| null |
10.12693/APhysPolA.143.S28
| null |
quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
The quantum nature of light enables potentially revolutionary communication
technologies. Key to advancing this area of research is a clear understanding
of the concepts of states, modes, fields, and photons. The concept of field
modes carries over from classical optics, while the concept of state has to be
considered carefully when treating light quantum mechanically. The term
'photon' is an overloaded identifier in the sense that it is often used to
refer to either a quantum particle or the state of a field. This overloading,
often used without placing in context, has the potential to obfuscate the
physical processes that describe the reality we measure. We review the uses and
relationships between these concepts using modern quantum optics theory,
including the concept of a photon wave function, the modern history of which
was moved forward in a groundbreaking paper in this journal by Iwo
Bia{\l}ynicki-Birula, to whom this article is dedicated.
|
[{'version': 'v1', 'created': 'Tue, 13 Jun 2023 14:30:45 GMT'}]
|
2023-06-14
|
[array(['Raymer', 'Michael G.', ''], dtype=object)
array(['Polakos', 'Paul', ''], dtype=object)]
|
2,525 |
2006.04010
|
Yulong Dong
|
Yulong Dong, Lin Lin
|
Random circuit block-encoded matrix and a proposal of quantum LINPACK
benchmark
|
22 pages, 18 figures
|
Phys. Rev. A 103, 062412 (2021)
|
10.1103/PhysRevA.103.062412
| null |
quant-ph cs.NA math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The LINPACK benchmark reports the performance of a computer for solving a
system of linear equations with dense random matrices. Although this task was
not designed with a real application directly in mind, the LINPACK benchmark
has been used to define the list of TOP500 supercomputers since the debut of
the list in 1993. We propose that a similar benchmark, called the quantum
LINPACK benchmark, could be used to measure the whole machine performance of
quantum computers. The success of the quantum LINPACK benchmark should be
viewed as the minimal requirement for a quantum computer to perform a useful
task of solving linear algebra problems, such as linear systems of equations.
We propose an input model called the RAndom Circuit Block-Encoded Matrix
(RACBEM), which is a proper generalization of a dense random matrix in the
quantum setting. The RACBEM model is efficient to be implemented on a quantum
computer, and can be designed to optimally adapt to any given quantum
architecture, with relying on a black-box quantum compiler. Besides solving
linear systems, the RACBEM model can be used to perform a variety of linear
algebra tasks relevant to many physical applications, such as computing
spectral measures, time series generated by a Hamiltonian simulation, and
thermal averages of the energy. We implement these linear algebra operations on
IBM Q quantum devices as well as quantum virtual machines, and demonstrate
their performance in solving scientific computing problems.
|
[{'version': 'v1', 'created': 'Sun, 7 Jun 2020 01:08:50 GMT'}
{'version': 'v2', 'created': 'Sat, 10 Jul 2021 06:37:50 GMT'}]
|
2021-07-13
|
[array(['Dong', 'Yulong', ''], dtype=object)
array(['Lin', 'Lin', ''], dtype=object)]
|
2,526 |
1308.2948
|
Feng Qi
|
Feng Qi, Muhammad Amer Latif, Wen-Hui Li, and Sabir Hussain
|
Some integral inequalities of Hermite-Hadamard type for functions whose
derivatives of $n$-th order are $(\alpha,m)$-convex
|
10 pages
|
Turkish Journal of Analysis and Number Theory 2 (2014), no. 4,
140--146
|
10.12691/tjant-2-4-7
| null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the paper, the authors find some new integral inequalities of
Hermite-Hadamard type for functions whose derivatives of the $n$-th order are
$(\alpha,m)$-convex and deduce some known results. As applications of the
newly-established results, the authors also derive some inequalities involving
special means of two positive real numbers.
|
[{'version': 'v1', 'created': 'Tue, 13 Aug 2013 19:19:38 GMT'}
{'version': 'v2', 'created': 'Sun, 5 Jan 2014 12:37:01 GMT'}
{'version': 'v3', 'created': 'Mon, 17 Feb 2014 10:37:29 GMT'}]
|
2014-09-05
|
[array(['Qi', 'Feng', ''], dtype=object)
array(['Latif', 'Muhammad Amer', ''], dtype=object)
array(['Li', 'Wen-Hui', ''], dtype=object)
array(['Hussain', 'Sabir', ''], dtype=object)]
|
2,527 |
astro-ph/0304217
|
Grzegorz Kowal
|
Grzegorz Kowal (1), Michal Hanasz (2), Katarzyna Otmianowska-Mazur (1)
((1) OA UJ, Krakow, Poland, (2) CA UMK, Piwnice/Torun, Poland)
|
Resistive MHD simulations of the Parker instability in galactic disks
|
12 pages, 13 eps figures, accepted for publication in A&A
|
Astron.Astrophys. 404 (2003) 533-544
|
10.1051/0004-6361:20030556
| null |
astro-ph
| null |
Parker instability leads to the formation of tangential discontinuities in a
magnetic field and subsequent magnetic reconnection due to a numerical and/or
an explicit resistivity. In this paper we investigate the role of the uniform,
localized and numerical resistivity on the diffusion of magnetic field lines
during the growth phase of Parker instability modes. We propose a new method to
quantify the diffusion of magnetic field lines which is attributed to the
presence of resistivity in ideal and non-ideal MHD codes. The method relies (1)
on integration of magnetic lines in between periodic boundaries, (2) on
measurements of the dispersion of magnetic field lines with the left and the
right periodic boundaries and (3) on a statistical analysis of shifts of a
large set of magnetic lines. The proposed method makes it possible to detect
topological evolution of magnetic field. We perform a series of resistive MHD
simulations of the Parker instability in uniformly rotating galactic disks. We
follow the topological evolution of the magnetic field evolving due to the
Parker instability and relate it to the ratio of total to uniform magnetic
field in galactic disks. We find that after the onset of the Parker
instability, the magnetic field becomes first tangled and later on it evolves
toward a uniform state due to the presence of resistivity. A similar effect of
a varying contribution of a turbulent magnetic field is observed in arms and
inter-arm regions of galaxies.
|
[{'version': 'v1', 'created': 'Fri, 11 Apr 2003 14:38:01 GMT'}]
|
2009-11-07
|
[array(['Kowal', 'Grzegorz', '', 'OA UJ, Krakow, Poland'], dtype=object)
array(['Hanasz', 'Michal', '', 'CA UMK, Piwnice/Torun, Poland'],
dtype=object)
array(['Otmianowska-Mazur', 'Katarzyna', '', 'OA UJ, Krakow, Poland'],
dtype=object) ]
|
2,528 |
1204.0424
|
Kei Yagyu
|
Kei Yagyu
|
Studies on Extended Higgs Sectors as a Probe of New Physics Beyond the
Standard Model
|
Ph.D thesis, 185 pages, 315 figures, 21 tables
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this thesis, we discuss theoretical properties of various Higgs sectors,
and we analyze constraints from current experimental data, and then we study
collider signatures in each Higgs sector. In Part I, we focus on the
phenomenology of various extended Higgs sectors such as the two Higgs doublet
model, the Higgs triplet model and Higgs sectors in supersymmetric standard
models. In Part II, we discuss new physics models at the TeV scale, in which
the Higgs sector is extended, and neutrino masses, dark matter and/or baryon
asymmetry of the Universe can be explained.
|
[{'version': 'v1', 'created': 'Mon, 2 Apr 2012 14:50:24 GMT'}]
|
2012-04-03
|
[array(['Yagyu', 'Kei', ''], dtype=object)]
|
2,529 |
1209.6599
|
Sarangam Majumdar
|
Sarangam Majumdar, Sukanta Nayak and S.Chakraverty
|
Fuzzy and interval finite element method for heat conduction problem
|
17 pages,6 figures, International Journal of Advances in Applied
Sciences,Vol 1 No4 (2012)
| null | null | null |
physics.gen-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Traditional finite element method is a well-established method to solve
various problems of science and engineering. Different authors have used
various methods to solve governing differential equation of heat conduction
problem. In this study, heat conduction in a circular rod has been considered
which is made up of two different materials viz. aluminum and copper. In
earlier studies parameters in the differential equation have been taken as
fixed (crisp) numbers which actually may not. Those parameters are found in
general by some measurements or experiments. So the material properties are
actually uncertain and may be considered to vary in an interval or as fuzzy and
in that case complex interval arithmetic or fuzzy arithmetic has to be
considered in the analysis. As such the problem is discretized into finite
number of elements which depend on interval/fuzzy parameters. Representation of
interval/fuzzy numbers may give the clear picture of uncertainty. Hence
interval/fuzzy arithmetic is applied in the finite element method to solve a
steady state heat conduction problem. Application of fuzzy finite element
method in the said problem gives fuzzy system of linear equations in general.
Here new methods have also been proposed to handle such type of fuzzy system of
linear equations. Corresponding results are computed and has been reported
here.
|
[{'version': 'v1', 'created': 'Wed, 26 Sep 2012 17:34:14 GMT'}]
|
2012-10-01
|
[array(['Majumdar', 'Sarangam', ''], dtype=object)
array(['Nayak', 'Sukanta', ''], dtype=object)
array(['Chakraverty', 'S.', ''], dtype=object)]
|
2,530 |
2005.09345
|
Luca Fausto Tocchio
|
Luca F. Tocchio, Arianna Montorsi, Federico Becca
|
Magnetic and spin-liquid phases in the frustrated $t-t^\prime$ Hubbard
model on the triangular lattice
|
7 pages, 5 figures
|
Phys. Rev. B 102, 115150 (2020)
|
10.1103/PhysRevB.102.115150
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Hubbard model and its strong-coupling version, the Heisenberg one, have
been widely studied on the triangular lattice to capture the essential
low-temperature properties of different materials. One example is given by
transition metal dichalcogenides, as 1T$-$TaS$_2$, where a large unit cell with
$13$ Ta atom forms weakly-coupled layers with an isotropic triangular lattice.
By using accurate variational Monte Carlo calculations, we report the phase
diagram of the $t-t^\prime$ Hubbard model on the triangular lattice,
highlighting the differences between positive and negative values of
$t^\prime/t$; this result can be captured only by including the charge
fluctuations that are always present for a finite electron-electron repulsion.
Two spin-liquid regions are detected: one for $t^\prime/t<0$, which persists
down to intermediate values of the electron-electron repulsion, and a narrower
one for $t^\prime/t>0$. The spin-liquid phase appears to be gapless, though the
variational wave function has a nematic character, in contrast to the
Heisenberg limit. We do not find any evidence for non-magnetic Mott phases in
the proximity of the metal-insulator transition, at variance with the
predictions (mainly based upon strong-coupling expansions in $t/U$) that
suggest the existence of a weak-Mott phase that intrudes between the metal and
the magnetically ordered insulator.
|
[{'version': 'v1', 'created': 'Tue, 19 May 2020 10:15:24 GMT'}
{'version': 'v2', 'created': 'Thu, 17 Sep 2020 15:45:37 GMT'}]
|
2020-09-25
|
[array(['Tocchio', 'Luca F.', ''], dtype=object)
array(['Montorsi', 'Arianna', ''], dtype=object)
array(['Becca', 'Federico', ''], dtype=object)]
|
2,531 |
2110.12420
|
Alexander Ukhlov D
|
Prashanta Garain and Alexander Ukhlov
|
Singular subelliptic equations and Sobolev inequalities on nilpotent Lie
groups
|
14 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article we study singular subelliptic $p$-Laplace equations and best
constants in Sobolev inequalities on nilpotent Lie groups. We prove solvability
of these subelliptic $p$-Laplace equations and existence of the minimizer of
the corresponding variational problem. It leads to existence of the best
constant in the corresponding $(q,p)$-Sobolev inequality, $0<q<1$, $1<p<\nu$.
|
[{'version': 'v1', 'created': 'Sun, 24 Oct 2021 11:56:28 GMT'}]
|
2021-10-26
|
[array(['Garain', 'Prashanta', ''], dtype=object)
array(['Ukhlov', 'Alexander', ''], dtype=object)]
|
2,532 |
1412.4622
|
Alexandre Popier
|
T. Kruse, A. Popier (LMM)
|
BSDEs with monotone generator driven by Brownian and Poisson noises in a
general filtration
| null | null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze multidimensional BSDEs in a filtration that supports a Brownian
motion and a Poisson random measure. Under a monotonicity assumption on the
driver, the paper extends several results from the literature. We establish
existence and uniqueness of solutions in $L^p$ provided that the generator and
the terminal condition satisfy appropriate integrability conditions. The
analysis is first carried out under a deterministic time horizon, and then
generalized to random time horizons given by a stopping time with respect to
the underlying filtration. Moreover, we provide a comparison principle in
dimension one.
|
[{'version': 'v1', 'created': 'Mon, 15 Dec 2014 14:52:20 GMT'}
{'version': 'v2', 'created': 'Wed, 28 Jan 2015 17:41:08 GMT'}
{'version': 'v3', 'created': 'Tue, 9 Jun 2015 12:03:06 GMT'}]
|
2015-06-10
|
[array(['Kruse', 'T.', '', 'LMM'], dtype=object)
array(['Popier', 'A.', '', 'LMM'], dtype=object)]
|
2,533 |
1503.06298
|
Ian Hambleton
|
Ian Hambleton and Ergun Yalcin
|
Group actions on spheres with rank one prime power isotropy
|
16 pages
|
Transactions Amer. Math. Soc. 368 (2016), 5951-5977
|
10.1090/tran/6567
| null |
math.GT math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that a rank two finite group G admits a finite G-CW-complex X
homotopy equivalent to a sphere, with rank one prime power isotropy, if and
only if G does not p'-involve Qd(p) for any odd prime p. This follows from a
more general theorem which allows us to construct a finite G-CW-complex by
gluing together a given G-invariant family of representations defined on the
Sylow subgroups of G.
|
[{'version': 'v1', 'created': 'Sat, 21 Mar 2015 13:11:35 GMT'}]
|
2017-08-29
|
[array(['Hambleton', 'Ian', ''], dtype=object)
array(['Yalcin', 'Ergun', ''], dtype=object)]
|
2,534 |
1303.3081
|
Valerio Scarani
|
Valerio Scarani
|
The device-independent outlook on quantum physics (lecture notes on the
power of Bell's theorem)
| null |
Acta Physica Slovaca 62, 347 (2012)
| null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This text is an introduction to an operational outlook on Bell inequalities,
which has been very fruitful in the past few years. It has lead to the
recognition that Bell tests have their own place in applied quantum
technologies, because they quantify non-classicality in a device-independent
way, that is, without any need to describe the degrees of freedom under study
and the measurements that are performed. At the more fundamental level, the
same device-independent outlook has allowed the falsification of several other
alternative models that could hope to reproduce the observed statistics while
keeping some classical features that quantum theory denies; and it has shed new
light on the long-standing quest for deriving quantum theory from physical
principles.
|
[{'version': 'v1', 'created': 'Wed, 13 Mar 2013 03:30:28 GMT'}
{'version': 'v2', 'created': 'Tue, 2 Apr 2013 04:52:25 GMT'}
{'version': 'v3', 'created': 'Fri, 1 Nov 2013 01:55:55 GMT'}
{'version': 'v4', 'created': 'Thu, 18 Jun 2015 01:54:09 GMT'}]
|
2015-06-19
|
[array(['Scarani', 'Valerio', ''], dtype=object)]
|
2,535 |
1603.01633
|
Ulugbek Kamilov
|
Ulugbek S. Kamilov and Petros T. Boufounos
|
Depth Superresolution using Motion Adaptive Regularization
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Spatial resolution of depth sensors is often significantly lower compared to
that of conventional optical cameras. Recent work has explored the idea of
improving the resolution of depth using higher resolution intensity as a side
information. In this paper, we demonstrate that further incorporating temporal
information in videos can significantly improve the results. In particular, we
propose a novel approach that improves depth resolution, exploiting the
space-time redundancy in the depth and intensity using motion-adaptive low-rank
regularization. Experiments confirm that the proposed approach substantially
improves the quality of the estimated high-resolution depth. Our approach can
be a first component in systems using vision techniques that rely on high
resolution depth information.
|
[{'version': 'v1', 'created': 'Fri, 4 Mar 2016 21:16:21 GMT'}]
|
2016-03-08
|
[array(['Kamilov', 'Ulugbek S.', ''], dtype=object)
array(['Boufounos', 'Petros T.', ''], dtype=object)]
|
2,536 |
2004.04348
|
Eitan Tadmor
|
Simon Foucart, Eitan Tadmor and Ming Zhong
|
On the sparsity of LASSO minimizers in sparse data recovery
| null | null | null | null |
cs.IT math.FA math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a detailed analysis of the unconstrained $\ell_1$-weighted LASSO
method for recovery of sparse data from its observation by randomly generated
matrices, satisfying the Restricted Isometry Property (RIP) with constant
$\delta<1$, and subject to negligible measurement and compressibility errors.
We prove that if the data is $k$-sparse, then the size of support of the LASSO
minimizer, $s$, maintains a comparable sparsity, $s\leq C_\delta k$. For
example, if $\delta=0.7$ then $s< 11k$ and a slightly smaller $\delta=0.4$
yields $s< 4k$. We also derive new $\ell_2/\ell_1$ error bounds which highlight
precise dependence on $k$ and on the LASSO parameter $\lambda$, before the
error is driven below the scale of negligible measurement/ and compressiblity
errors.
|
[{'version': 'v1', 'created': 'Thu, 9 Apr 2020 03:19:32 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Apr 2020 21:11:25 GMT'}
{'version': 'v3', 'created': 'Mon, 14 Mar 2022 22:56:58 GMT'}]
|
2022-03-16
|
[array(['Foucart', 'Simon', ''], dtype=object)
array(['Tadmor', 'Eitan', ''], dtype=object)
array(['Zhong', 'Ming', ''], dtype=object)]
|
2,537 |
1305.2754
|
Roberto Alamino
|
Roberto C. Alamino, Juan P. Neirotti, David Saad
|
Replication-based Inference Algorithms for Hard Computational Problems
|
23 pages, 2 figures
| null |
10.1103/PhysRevE.88.013313
| null |
cond-mat.dis-nn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inference algorithms based on evolving interactions between replicated
solutions are introduced and analyzed on a prototypical NP-hard problem - the
capacity of the binary Ising perceptron. The efficiency of the algorithm is
examined numerically against that of the parallel tempering algorithm, showing
improved performance in terms of the results obtained, computing requirements
and simplicity of implementation.
|
[{'version': 'v1', 'created': 'Mon, 13 May 2013 12:28:31 GMT'}]
|
2015-06-15
|
[array(['Alamino', 'Roberto C.', ''], dtype=object)
array(['Neirotti', 'Juan P.', ''], dtype=object)
array(['Saad', 'David', ''], dtype=object)]
|
2,538 |
dg-ga/9709019
|
Udo Jeromin
|
Udo Hertrich-Jeromin
|
Supplement on Curved flats in the space of point pairs and Isothermic
surfaces: A Quaternionic Calculus
|
14 pages, Plain TeX
|
Doc. Math. J. DMV 2, 335-350 (1997)
| null | null |
dg-ga math.DG
| null |
A quaternionic calculus for surface pairs in the conformal 4-sphere is
elaborated. This calculus is then used to discuss the relation between curved
flats in the symmetric space of point pairs and Darboux and Christoffel pairs
of isothermic surfaces. A new viewpoint on relations between surfaces of
constant mean curvature in certain space forms is presented --- in particular,
a new form of Bryant's Weierstrass type representation for surfaces of constant
mean curvature 1 in hyperbolic 3-space is given.
|
[{'version': 'v1', 'created': 'Wed, 24 Sep 1997 19:13:25 GMT'}]
|
2008-02-03
|
[array(['Hertrich-Jeromin', 'Udo', ''], dtype=object)]
|
2,539 |
2106.15819
|
Cambyse Rouze
|
Giacomo De Palma and Cambyse Rouz\'e
|
Quantum concentration inequalities
|
31 pages, one figure
| null |
10.1007/s00023-022-01181-1
| null |
quant-ph math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We establish transportation cost inequalities (TCI) with respect to the
quantum Wasserstein distance by introducing quantum extensions of well-known
classical methods: first, using a non-commutative version of Ollivier's coarse
Ricci curvature, we prove that high temperature Gibbs states of commuting
Hamiltonians on arbitrary hypergraphs $H=(V,E)$ satisfy a TCI with constant
scaling as $O(|V|)$. Second, we argue that the temperature range for which the
TCI holds can be enlarged by relating it to recently established modified
logarithmic Sobolev inequalities. Third, we prove that the inequality still
holds for fixed points of arbitrary reversible local quantum Markov semigroups
on regular lattices, albeit with slightly worsened constants, under a seemingly
weaker condition of local indistinguishability of the fixed points. Finally, we
use our framework to prove Gaussian concentration bounds for the distribution
of eigenvalues of quasi-local observables and argue the usefulness of the TCI
in proving the equivalence of the canonical and microcanonical ensembles and an
exponential improvement over the weak Eigenstate Thermalization Hypothesis.
|
[{'version': 'v1', 'created': 'Wed, 30 Jun 2021 05:44:12 GMT'}
{'version': 'v2', 'created': 'Tue, 3 May 2022 10:04:29 GMT'}]
|
2022-05-04
|
[array(['De Palma', 'Giacomo', ''], dtype=object)
array(['Rouzé', 'Cambyse', ''], dtype=object)]
|
2,540 |
1610.06192
|
Artymowski Michal
|
Konstantinos Dimopoulos and Michal Artymowski
|
Initial conditions for inflation
|
14 pages, 1 figure
| null |
10.1016/j.astropartphys.2017.06.006
| null |
astro-ph.CO hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Within the $\alpha$-attractors framework we investigate scalar potentials
with the same pole as the one featured in the kinetic term. We show that, in
field space, this leads to directions without a plateau. Using this, we present
a proposal, which manages to overcome the initial conditions problem of
inflation with a plateau. An earlier period of proto-inflation, beginning at
Planck scale, accounts for the Universe expansion and arranges the required
initial conditions for inflation on the plateau to commence. We show that, if
proto-inflation is power-law, it does not suffer from a sub-Planckian eternal
inflationary stage, which would otherwise be a problem. A simple model
realisation is constructed in the context of $\alpha$-attractors, which can
both generate the inflationary plateau and the exponential slopes around it,
necessary for the two inflation stages. Our mechanism allows to assume chaotic
initial conditions at the Planck scale for proto-inflation, it is generic and
it is shown to work without fine-tuning.
|
[{'version': 'v1', 'created': 'Wed, 19 Oct 2016 20:07:24 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Nov 2016 19:54:24 GMT'}
{'version': 'v3', 'created': 'Wed, 1 Feb 2017 18:39:35 GMT'}
{'version': 'v4', 'created': 'Wed, 19 Jul 2017 11:04:26 GMT'}]
|
2017-07-26
|
[array(['Dimopoulos', 'Konstantinos', ''], dtype=object)
array(['Artymowski', 'Michal', ''], dtype=object)]
|
2,541 |
0909.1782
|
Shel Finkelstein
|
Shel Finkelstein (SAP), Dean Jacobs (SAP), Rainer Brendle (SAP)
|
Principles for Inconsistency
|
CIDR 2009
| null | null | null |
cs.DB
|
http://creativecommons.org/licenses/by/3.0/
|
Data consistency is very desirable because strong semantic properties make it
easier to write correct programs that perform as users expect. However, there
are good reasons why consistency may have to be weakened to achieve other
business goals. In this CIDR 2009 Perspectives paper, we present real-world
reasons inconsistency may be necessary, offer principles for managing
inconsistency coherently, and describe implementation approaches we are
investigating for sustainably scalable systems that offer comprehensible user
experiences despite inconsistency.
|
[{'version': 'v1', 'created': 'Wed, 9 Sep 2009 18:10:33 GMT'}]
|
2009-09-15
|
[array(['Finkelstein', 'Shel', '', 'SAP'], dtype=object)
array(['Jacobs', 'Dean', '', 'SAP'], dtype=object)
array(['Brendle', 'Rainer', '', 'SAP'], dtype=object)]
|
2,542 |
1804.05939
|
Karo Michaelian
|
Juli\'an Mej\'ia and Karo Michaelian
|
Origin of Information Encoding in Nucleic Acids through a
Dissipation-Replication Relation
|
17 pages, 3 figures, one table
|
Entropy 2020, 22(9), 940
|
10.3390/e22090940
| null |
physics.bio-ph physics.chem-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Ultraviolet light incident on organic material can initiate its spontaneous
dissipative structuring into chromophores which can then catalyze their own
replication. This may have been the case for one of the most ancient of all
chromophores dissipating the Archean UVC photon flux, the nucleic acids. Under
the empirically established imperative of increasing entropy production,
nucleic acids with affinity to particular amino acids which foment UVC photon
dissipation would have been "thermodynamically selected" through this
dissipation-replication relation. Indeed, we show here that those amino acids
with characteristics most relevant to fomenting UVC photon dissipation are
precisely those with greatest affinity to their codons or anticodons. This
could provide a physical-chemical mechanism for the accumulation of information
in nucleic acids relevant to the dissipation of the externally imposed photon
potential. This mechanism could provide a non-equilibrium thermodynamic
foundation, based on increasing global entropy production of the biosphere, for
the tenants of Darwinian natural selection. We show how this mechanism might
have begun operating at the origin of life in the Archean, and how, in fact, it
still operates today, albeit indirectly through complex biosynthetic pathways
now operating in the visible.
|
[{'version': 'v1', 'created': 'Thu, 12 Apr 2018 22:15:40 GMT'}]
|
2020-09-07
|
[array(['Mejía', 'Julián', ''], dtype=object)
array(['Michaelian', 'Karo', ''], dtype=object)]
|
2,543 |
1806.04942
|
Ana Serrano
|
Ana Serrano, Felix Heide, Diego Gutierrez, Gordon Wetzstein, Belen
Masia
|
Convolutional Sparse Coding for High Dynamic Range Imaging
| null |
Computer Graphics Forum 35, 2, Pages 153-163 (May 2016)
|
10.1111/cgf.12819
| null |
cs.CV cs.GR eess.IV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Current HDR acquisition techniques are based on either (i) fusing
multibracketed, low dynamic range (LDR) images, (ii) modifying existing
hardware and capturing different exposures simultaneously with multiple
sensors, or (iii) reconstructing a single image with spatially-varying pixel
exposures. In this paper, we propose a novel algorithm to recover high-quality
HDRI images from a single, coded exposure. The proposed reconstruction method
builds on recently-introduced ideas of convolutional sparse coding (CSC); this
paper demonstrates how to make CSC practical for HDR imaging. We demonstrate
that the proposed algorithm achieves higher-quality reconstructions than
alternative methods, we evaluate optical coding schemes, analyze algorithmic
parameters, and build a prototype coded HDR camera that demonstrates the
utility of convolutional sparse HDRI coding with a custom hardware platform.
|
[{'version': 'v1', 'created': 'Wed, 13 Jun 2018 10:48:33 GMT'}]
|
2018-06-14
|
[array(['Serrano', 'Ana', ''], dtype=object)
array(['Heide', 'Felix', ''], dtype=object)
array(['Gutierrez', 'Diego', ''], dtype=object)
array(['Wetzstein', 'Gordon', ''], dtype=object)
array(['Masia', 'Belen', ''], dtype=object)]
|
2,544 |
1811.07813
|
Chih-Chun Chien
|
Palak Dugar and Chih-Chun Chien
|
Geometry induced local thermal current from cold to hot in a classical
harmonic system
|
12 pages, 7 figures
|
Phys. Rev. E 99, 022131 (2019)
|
10.1103/PhysRevE.99.022131
| null |
cond-mat.mes-hall cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The second law of thermodynamics requires the overall thermal current to flow
from hot to cold. However, it does not forbid a local thermal current from
flowing from cold to hot. By coupling a harmonic system of three masses
connected by a few springs to two Langevin reservoirs at different
temperatures, a local atypical thermal current is found to flow from cold to
hot in the steady state while the overall thermal current is still from hot to
cold. The direction of the local thermal current can be tuned by the mass,
spring constant, and system-reservoir coupling. The local thermal current can
vanish if the parameters are tuned to proper values. We also consider nonlinear
effect from the system-substrate coupling and find that the local atypical
thermal current survives in the presence of the nonlinear potential. Moreover,
the local atypical thermal current is robust against asymmetry of the
system-reservoir coupling, inhomogeneity of the nonlinear potential, and
additions of more masses and springs. In molecular or nanomechanical systems
where the setup may find its realization, the direction of the local thermal
current may be controlled by mechanical or electromagnetic means, which may
lead to applications in information storage.
|
[{'version': 'v1', 'created': 'Mon, 19 Nov 2018 17:17:44 GMT'}
{'version': 'v2', 'created': 'Wed, 23 Jan 2019 02:16:24 GMT'}]
|
2019-02-27
|
[array(['Dugar', 'Palak', ''], dtype=object)
array(['Chien', 'Chih-Chun', ''], dtype=object)]
|
2,545 |
2007.10733
|
Guojing Tian
|
Zhi-Chao Zhang, Guojing Tian, Tian-Qing Cao
|
Strong quantum nonlocality for multipartite entangled states
| null | null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, Halder \emph{et al.} [S. Halder \emph{et al.}, Phys. Rev. Lett.
\textbf{122}, 040403 (2019)] present two sets of strong nonlocality of
orthogonal product states based on the local irreducibility. However, for a set
of locally indistinguishable orthogonal entangled states, the remaining
question is whether the states can reveal strong quantum nonlocality. Here we
present a general definition of strong quantum nonlocality based on the local
indistinguishability. Then, in $2 \otimes 2 \otimes 2$ quantum system, we show
that a set of orthogonal entangled states is locally reducible but locally
indistinguishable in all bipartitions, which means the states have strong
nonlocality. Furthermore, we generalize the result in N-qubit quantum system,
where $N\geqslant 3$. Finally, we also construct a class of strong nonlocality
of entangled states in $d\otimes d\otimes \cdots \otimes d, d\geqslant 3$. Our
results extend the phenomenon of strong nonlocality for entangled states.
|
[{'version': 'v1', 'created': 'Tue, 21 Jul 2020 11:45:33 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Jul 2020 00:39:31 GMT'}]
|
2020-07-27
|
[array(['Zhang', 'Zhi-Chao', ''], dtype=object)
array(['Tian', 'Guojing', ''], dtype=object)
array(['Cao', 'Tian-Qing', ''], dtype=object)]
|
2,546 |
gr-qc/0202050
|
Banibrata Mukhopadhyay
|
Banibrata Mukhopadhyay
|
Dynamics of electromagnetic waves in Kerr geometry
|
15 Latex pages, 4 Figures; Accepted for publication in Classical and
Quantum Gravity
|
Class.Quant.Grav. 19 (2002) 2307-2318
|
10.1088/0264-9381/19/8/317
| null |
gr-qc astro-ph
| null |
Here we are interested to study the spin-1 particle i.e., electro-magnetic
wave in curved space-time, say around black hole. After separating the
equations into radial and angular parts, writing them according to the black
hole geometry, say, Kerr black hole we solve them analytically. Finally we
produce complete solution of the spin-1 particles around a rotating black hole
namely in Kerr geometry. Obviously there is coupling between spin of the
electro-magnetic wave and that of black hole when particles propagate in that
space-time. So the solution will be depending on that coupling strength. This
solution may be useful to study different other problems where the analytical
results are needed. Also the results may be useful in some astrophysical
contexts.
|
[{'version': 'v1', 'created': 'Thu, 14 Feb 2002 18:12:01 GMT'}]
|
2009-11-07
|
[array(['Mukhopadhyay', 'Banibrata', ''], dtype=object)]
|
2,547 |
2104.02229
|
Xiaopeng Zhao professor
|
Honggang Chen, Mingzhong Wang, Yao Qi, Yongbo Li, Xiaopeng Zhao
|
Relationship between the TC of smart meta-superconductor Bi(Pb)SrCaCuO
and inhomogeneous phase content
| null | null | null | null |
cond-mat.supr-con
|
http://creativecommons.org/licenses/by/4.0/
|
A smart meta-superconductor Bi(Pb)SrCaCuO (B(P)SCCO) may increase the
critical transition temperature (TC) of B(P)SCCO by electroluminescence (EL)
energy injection of inhomogeneous phases. However, the increase amplitude
{\Delta}TC ({\Delta}TC=TC-T(C,pure)) of TC is relatively small. In this study,
a smart meta-superconductor B(P)SCCO with different matrix sizes was designed.
Three kinds of raw materials with different particle sizes were used, and
different series of Y2O3:Sm3+, Y2O3, Y2O3:Eu3+, and Y2O3:Eu3++Ag doped samples
and pure B(P)SCCO were prepared. Results indicated that the TC of the Y2O3 or
Y2O3:Sm3+ non-luminescent dopant doping sample is lower than that of pure
B(P)SCCO. However, the TC of the Y2O3:Eu3++Ag or Y2O3:Eu3+ luminescent
inhomogeneous phase doping sample is higher than that of pure B(P)SCCO. With
the decrease of the raw material particle size from 30 to 5 {\mu}m, the
particle size of the B(P)SCCO superconducting matrix in the prepared samples
decreases, and the doping content of the Y2O3:Eu3++Ag or Y2O3:Eu3+ increases
from 0.2% to 0.4%. Meanwhile, the increase of the inhomogeneous phase content
enhances the {\Delta}TC. When the particle size of raw material is 5 {\mu}m,
the doping concentration of the luminescent inhomogeneous phase can be
increased to 0.4%. At this time, the zero-resistance temperature and onset
transition temperature of the Y2O3:Eu3++Ag doped sample are 4 and 6.3 K higher
than those of pure B(P)SCCO, respectively.
|
[{'version': 'v1', 'created': 'Tue, 6 Apr 2021 01:44:23 GMT'}]
|
2021-04-07
|
[array(['Chen', 'Honggang', ''], dtype=object)
array(['Wang', 'Mingzhong', ''], dtype=object)
array(['Qi', 'Yao', ''], dtype=object)
array(['Li', 'Yongbo', ''], dtype=object)
array(['Zhao', 'Xiaopeng', ''], dtype=object)]
|
2,548 |
1806.00933
|
Kohei Motegi
|
Kohei Motegi
|
Elliptic free-fermion model with OS boundary and elliptic Pfaffians
|
23 pages, 8 figures
|
Lett. Math. Phys. (2019) 109: 923-943
|
10.1007/s11005-018-1130-8
| null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce and study a class of partition functions of an elliptic
free-fermionic face model. We study the partition functions with a triangular
boundary using the off-diagonal $K$-matrix at the boundary (OS boundary), which
was introduced by Kuperberg as a class of variants of the domain wall boundary
partition functions. We find explicit forms of the partition functions with OS
boundary using elliptic Pfaffians. We find two expressions based on two
versions of Korepin's method, and we obtain an identity between two elliptic
Pfaffians as a corollary.
|
[{'version': 'v1', 'created': 'Mon, 4 Jun 2018 02:45:59 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Oct 2018 01:06:35 GMT'}]
|
2019-03-08
|
[array(['Motegi', 'Kohei', ''], dtype=object)]
|
2,549 |
2212.00893
|
Cyrus Neary
|
Cyrus Neary and Ufuk Topcu
|
Compositional Learning of Dynamical System Models Using Port-Hamiltonian
Neural Networks
|
Paper accepted for publication at L4DC 2023
| null | null | null |
cs.LG cs.AI cs.SY eess.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Many dynamical systems -- from robots interacting with their surroundings to
large-scale multiphysics systems -- involve a number of interacting subsystems.
Toward the objective of learning composite models of such systems from data, we
present i) a framework for compositional neural networks, ii) algorithms to
train these models, iii) a method to compose the learned models, iv)
theoretical results that bound the error of the resulting composite models, and
v) a method to learn the composition itself, when it is not known a priori. The
end result is a modular approach to learning: neural network submodels are
trained on trajectory data generated by relatively simple subsystems, and the
dynamics of more complex composite systems are then predicted without requiring
additional data generated by the composite systems themselves. We achieve this
compositionality by representing the system of interest, as well as each of its
subsystems, as a port-Hamiltonian neural network (PHNN) -- a class of neural
ordinary differential equations that uses the port-Hamiltonian systems
formulation as inductive bias. We compose collections of PHNNs by using the
system's physics-informed interconnection structure, which may be known a
priori, or may itself be learned from data. We demonstrate the novel
capabilities of the proposed framework through numerical examples involving
interacting spring-mass-damper systems. Models of these systems, which include
nonlinear energy dissipation and control inputs, are learned independently.
Accurate compositions are learned using an amount of training data that is
negligible in comparison with that required to train a new model from scratch.
Finally, we observe that the composite PHNNs enjoy properties of
port-Hamiltonian systems, such as cyclo-passivity -- a property that is useful
for control purposes.
|
[{'version': 'v1', 'created': 'Thu, 1 Dec 2022 22:22:38 GMT'}
{'version': 'v2', 'created': 'Sat, 13 May 2023 21:42:49 GMT'}]
|
2023-05-16
|
[array(['Neary', 'Cyrus', ''], dtype=object)
array(['Topcu', 'Ufuk', ''], dtype=object)]
|
2,550 |
2008.07033
|
Armando A. Aligia
|
A. A. Aligia
|
Comment on "Relevance of Cu-3d multiplet structure in models of high Tc
cuprates''
|
3 pages, no figures
|
Phys. Rev. B 102, 117101 (2020)
|
10.1103/PhysRevB.102.117101
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a recent work [M. Jiang, M. Moeller, M. Berciu, and G. A. Sawatzky, Phys.
Rev. B \textbf{101}, 035151 (2020)], the authors solved a model with a Cu
impurity in an O-2p band as an approximation to the local electronic structure
of a hole doped cuprate. One of their conclusions is that the ground-state has
only $\sim 50$ \% overlap with a Zhang-Rice singlet (ZRS). This claim is based
on the definition of the ZRS in a different representation, in which the charge
fluctuations at the Cu site have been eliminated by a canonical transformation.
The correct interpretation of the results, based on known low-energy reduction
procedures for a multiband model including 3d$^8$ and 3d$^{10}$ configurations
of Cu, indicates that this overlap is near 94 \%.
|
[{'version': 'v1', 'created': 'Mon, 17 Aug 2020 00:11:27 GMT'}]
|
2020-09-30
|
[array(['Aligia', 'A. A.', ''], dtype=object)]
|
2,551 |
1607.06588
|
Ni Yuan-Hua
|
Yuan-Hua Ni, Ji-Feng Zhang, Miroslav Krstic
|
Time-Inconsistent Mean-Field Stochastic LQ Problem: Open-Loop
Time-Consistent Control
| null | null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper is concerned with the open-loop time-consistent solution of
time-inconsistent mean-field stochastic linear-quadratic optimal control.
Different from standard stochastic linear-quadratic problems, both the system
matrices and the weighting matrices are dependent on the initial times, and the
conditional expectations of the control and state enter quadratically into the
cost functional. Such features will ruin Bellman's principle of optimality and
result in the time-inconsistency of the optimal control. Based on the dynamical
nature of the systems involved, a kind of open-loop time-consistent equilibrium
control is investigated in this paper. It is shown that the existence of
open-loop time-consistent equilibrium control for a fixed initial pair is
equivalent to the solvability of a set of forward-backward stochastic
difference equations with stationary conditions and convexity conditions. By
decoupling the forward-backward stochastic difference equations, necessary and
sufficient conditions in terms of linear difference equations and generalized
difference Riccati equations are given for the existence of open-loop
time-consistent equilibrium control with a fixed initial pair. Moreover, the
existence of open-loop time-consistent equilibrium control for all the initial
pairs is shown to be equivalent to the solvability of a set of coupled
constrained generalized difference Riccati equations and two sets of
constrained linear difference equations.
|
[{'version': 'v1', 'created': 'Fri, 22 Jul 2016 08:18:55 GMT'}
{'version': 'v2', 'created': 'Thu, 18 Aug 2016 08:52:52 GMT'}]
|
2016-08-19
|
[array(['Ni', 'Yuan-Hua', ''], dtype=object)
array(['Zhang', 'Ji-Feng', ''], dtype=object)
array(['Krstic', 'Miroslav', ''], dtype=object)]
|
2,552 |
1707.06880
|
Daniel Wachsmuth
|
Eduardo Casas and Daniel Wachsmuth and Gerd Wachsmuth
|
Second-Order Analysis and Numerical Approximation for Bang-Bang Bilinear
Control Problems
| null | null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider bilinear optimal control problems, whose objective functionals do
not depend on the controls. Hence, bang-bang solutions will appear. We
investigate sufficient second-order conditions for bang-bang controls, which
guarantee local quadratic growth of the objective functional in $L^1$. In
addition, we prove that for controls that are not bang-bang, no such growth can
be expected. Finally, we study the finite-element discretization, and prove
error estimates of bang-bang controls in $L^1$-norms.
|
[{'version': 'v1', 'created': 'Fri, 21 Jul 2017 13:02:00 GMT'}]
|
2017-07-24
|
[array(['Casas', 'Eduardo', ''], dtype=object)
array(['Wachsmuth', 'Daniel', ''], dtype=object)
array(['Wachsmuth', 'Gerd', ''], dtype=object)]
|
2,553 |
2107.13691
|
Andriy Olenko
|
N.Leonenko, A.Malyarenko, A.Olenko
|
On Spectral Theory of Random Fields in the Ball
|
15 pages, 4 figures
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The paper investigates random fields in the ball. It studies three types of
such fields: restrictions of scalar random fields in the ball to the sphere,
spin, and vector random fields. The review of the existing results and new
spectral theory for each of these classes of random fields are given. Examples
of applications to classical and new models of these three types are presented.
In particular, the Mat\'{e}rn model is used for illustrative examples. The
derived spectral representations can be utilised to further study theoretical
properties of such fields and to simulate their realisations. The obtained
results can also find various applications for modelling and investigating ball
data in cosmology, geosciences and embryology.
|
[{'version': 'v1', 'created': 'Thu, 29 Jul 2021 00:53:23 GMT'}]
|
2021-07-30
|
[array(['Leonenko', 'N.', ''], dtype=object)
array(['Malyarenko', 'A.', ''], dtype=object)
array(['Olenko', 'A.', ''], dtype=object)]
|
2,554 |
1903.03287
|
Justin Lyle
|
Toshinori Kobayashi, Justin Lyle, Ryo Takahashi
|
Maximal Cohen-Macaulay modules that are not locally free on the
punctured spectrum
|
24 pages. Minor corrections made throughout
| null | null | null |
math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We say that a Cohen-Macaulay local ring has finite
$\operatorname{\mathsf{CM}}_+$-representation type if there exist only finitely
many isomorphism classes of indecomposable maximal Cohen-Macaulay modules that
are not locally free on the punctured spectrum. In this paper, we consider
finite $\operatorname{\mathsf{CM}}_+$-representation type from various points
of view, relating it with several conjectures on finite/countable
Cohen-Macaulay representation type. We prove in dimension one that the
Gorenstein local rings of finite $\operatorname{\mathsf{CM}}_+$-representation
type are exactly the local hypersurfaces of countable
$\mathsf{CM}$-representation type, that is, the hypersurfaces of type
$(\mathrm{A}_\infty)$ and $(\mathrm{D}_\infty)$. We also discuss the closedness
and dimension of the singular locus of a Cohen-Macaulay local ring of finite
$\operatorname{\mathsf{CM}}_+$-representation type.
|
[{'version': 'v1', 'created': 'Fri, 8 Mar 2019 05:04:01 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Jan 2020 09:45:11 GMT'}]
|
2020-01-13
|
[array(['Kobayashi', 'Toshinori', ''], dtype=object)
array(['Lyle', 'Justin', ''], dtype=object)
array(['Takahashi', 'Ryo', ''], dtype=object)]
|
2,555 |
1606.07655
|
Sascha Kurz
|
Thomas Honold, Michael Kiermaier, and Sascha Kurz
|
Classification of large partial plane spreads in $PG(6,2)$ and related
combinatorial objects
|
31 pages, 9 tables
| null |
10.1007/s00022-018-0459-6
| null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, the partial plane spreads in $PG(6,2)$ of maximum possible
size $17$ and of size $16$ are classified. Based on this result, we obtain the
classification of the following closely related combinatorial objects: Vector
space partitions of $PG(6,2)$ of type $(3^{16} 4^1)$, binary $3\times 4$ MRD
codes of minimum rank distance $3$, and subspace codes with parameters
$(7,17,6)_2$ and $(7,34,5)_2$.
|
[{'version': 'v1', 'created': 'Fri, 24 Jun 2016 12:22:09 GMT'}
{'version': 'v2', 'created': 'Wed, 2 May 2018 14:10:39 GMT'}]
|
2018-12-17
|
[array(['Honold', 'Thomas', ''], dtype=object)
array(['Kiermaier', 'Michael', ''], dtype=object)
array(['Kurz', 'Sascha', ''], dtype=object)]
|
2,556 |
2212.10611
|
Ceren Tayran
|
C. Tayran and M. \c{C}akmak
|
Atomic, electronic, and superconducting properties of Zr$_2$Ir compound
| null | null |
10.1016/j.physb.2023.414904
| null |
physics.comp-ph cond-mat.mtrl-sci
|
http://creativecommons.org/publicdomain/zero/1.0/
|
We have investigated the structural, electronic, mechanical, phononic, and
superconducting properties of the Zr$_2$Ir compound with a body-centered
tetragonal crystal structure using first-principles calculations. Our analysis
reveals that the Zr$_2$Ir compound shows mechanical and dynamically stable by
using with and without spin-orbit coupling (SOC) effect. After calculating some
properties such as elastic constants, Bulk modulus, Young's modulus, Poisson
ratio, Debye temperature, and sound velocity, we found that Zr$_2$Ir is
ductile. When the elastic constants $C_{11}$ and $C_{33}$ are compared, it is
determined that the situation changes in the opposite direction under the
effect of SOC, that is, more compressibility along the x-axis turns into the
z-axis. Here, the electronic band structure and intensity of the states
calculated for the compound show a metallic character. The superconducting
critical temperature ($T_c$) and electron-phonon coupling constant ($\lambda$)
were found to be 7.50 K and 0.93 without SOC and 7.62 K and 0.96 with SOC,
respectively. We determined that although the Zr$_2$Ir compound has a strong
electron-phonon coupling regime, the inclusion of SOC slightly reduces its
critical temperature and electron-phonon coupling constant.
|
[{'version': 'v1', 'created': 'Tue, 20 Dec 2022 19:28:35 GMT'}]
|
2023-05-17
|
[array(['Tayran', 'C.', ''], dtype=object)
array(['Çakmak', 'M.', ''], dtype=object)]
|
2,557 |
0806.3630
|
Chau Yuen
|
Chau Yuen, Sumei Sun, Jian-Kang Zhang
|
Comparative Study of SVD and QRS in Closed-Loop Beamforming Systems
|
Milcom 2007
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compare two closed-loop beamforming algorithms, one based on singular
value decomposition (SVD) and the other based on equal diagonal QR
decomposition (QRS). SVD has the advantage of parallelizing the MIMO channel,
but each of the sub-channels has different gain. QRS has the advantage of
having equal diagonal value for the decomposed channel, but the subchannels are
not fully parallelized, hence requiring successive interference cancellation or
other techniques to perform decoding. We consider a closed-loop system where
the feedback information is a unitary beamforming matrix. Due to the discrete
and limited modulation set, SVD may have inferior performance to QRS when no
modulation set selection is performed. However, if the selection of modulation
set is performed optimally, we show that SVD can outperform QRS.
|
[{'version': 'v1', 'created': 'Mon, 23 Jun 2008 07:54:55 GMT'}]
|
2008-06-24
|
[array(['Yuen', 'Chau', ''], dtype=object)
array(['Sun', 'Sumei', ''], dtype=object)
array(['Zhang', 'Jian-Kang', ''], dtype=object)]
|
2,558 |
2010.09472
|
Charalambos Chrysostomou
|
Charalambos Chrysostomou, Loizos Koutsantonis, Christos Lemesios,
Costas N. Papanicolas
|
SPECT Imaging Reconstruction Method Based on Deep Convolutional Neural
Network
|
2019 IEEE Nuclear Science Symposium and Medical Imaging Conference
(NSS/MIC). IEEE
| null |
10.1109/NSS/MIC42101.2019.9060056
| null |
cs.LG physics.med-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we explore a novel method for tomographic image reconstruction
in the field of SPECT imaging. Deep Learning methodologies and more
specifically deep convolutional neural networks (CNN) are employed in the new
reconstruction method, which is referred to as "CNN Reconstruction - CNNR". For
training of the CNNR Projection data from software phantoms were used. For
evaluation of the efficacy of the CNNR method, both software and hardware
phantoms were used. The resulting tomographic images are compared to those
produced by filtered back projection (FBP) [1], the "Maximum Likelihood
Expectation Maximization" (MLEM) [1] and ordered subset expectation
maximization (OSEM) [2].
|
[{'version': 'v1', 'created': 'Mon, 19 Oct 2020 13:11:32 GMT'}]
|
2020-10-20
|
[array(['Chrysostomou', 'Charalambos', ''], dtype=object)
array(['Koutsantonis', 'Loizos', ''], dtype=object)
array(['Lemesios', 'Christos', ''], dtype=object)
array(['Papanicolas', 'Costas N.', ''], dtype=object)]
|
2,559 |
solv-int/9801022
|
Anton Zabrodin
|
I.Krichever and A.Zabrodin
|
Vacuum curves of elliptic L-operators and representations of Sklyanin
algebra
|
27 pages, latex, typos corrected
| null | null |
ITEP-TH-76/97
|
solv-int hep-th nlin.SI
| null |
An algebro-geometric approach to representations of Sklyanin algebra is
proposed. To each 2 \times 2 quantum L-operator an algebraic curve
parametrizing its possible vacuum states is associated. This curve is called
the vacuum curve of the L-operator. An explicit description of the vacuum curve
for quantum L-operators of the integrable spin chain of XYZ type with arbitrary
spin $\ell$ is given. The curve is highly reducible. For half-integer $\ell$ it
splits into $\ell +{1/2}$ components isomorphic to an elliptic curve. For
integer $\ell$ it splits into $\ell$ elliptic components and one rational
component. The action of elements of the L-operator to functions on the vacuum
curve leads to a new realization of the Sklyanin algebra by difference
operators in two variables restricted to an invariant functional subspace.
|
[{'version': 'v1', 'created': 'Thu, 22 Jan 1998 20:03:38 GMT'}
{'version': 'v2', 'created': 'Wed, 20 May 1998 15:18:44 GMT'}]
|
2016-09-08
|
[array(['Krichever', 'I.', ''], dtype=object)
array(['Zabrodin', 'A.', ''], dtype=object)]
|
2,560 |
0807.0957
|
Leonardo Chiatti
|
L. Chiatti
|
Faster than light communication : is it possible ?
|
3 pages, 2 figures
| null | null |
2008-3
|
physics.gen-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A quantum optical apparatus permitting a faster than light communication
between distant locations has been recently proposed by Shiekh. Some several
conceptual difficulties concerning this proposal are briefly addressed.
|
[{'version': 'v1', 'created': 'Mon, 7 Jul 2008 07:06:01 GMT'}]
|
2008-07-08
|
[array(['Chiatti', 'L.', ''], dtype=object)]
|
2,561 |
physics/0405043
|
T. N. Mukhamedjanov
|
T.N. Mukhamedjanov, O.P. Sushkov, J.M. Cadogan
|
Manifestations of nuclear anapole moments in solid state NMR
|
16 pages
| null |
10.1103/PhysRevA.71.012107
| null |
physics.atom-ph cond-mat.other hep-ph
| null |
We suggest to use insulating garnets doped by rare earth ions for
measurements of nuclear anapole moments. A parity violating shift of the NMR
frequency arises due to the combined effect of the lattice crystal field and
the anapole moment of the rare-earth nucleus.
We show that there are two different observable effects related to frequency:
1) A shift of the NMR frequency in an external electric field applied to the
solid. The value of the shift is about \Delta \nu_1 ~ 10^{-5} Hz with E = 10
kV/cm; 2) A splitting of the NMR line into two lines. The second effect is
independent of the external electric field. The value of the splitting is about
\Delta \nu_2 ~ 0.5 Hz and it depends on the orientation of the crystal with
respect to magnetic field. Both estimates are presented for a magnetic field of
about 10 tesla.
We also discuss a radiofrequency electric field and a static macroscopic
magnetization caused by the nuclear anapole moment.
|
[{'version': 'v1', 'created': 'Mon, 10 May 2004 14:17:10 GMT'}]
|
2009-11-10
|
[array(['Mukhamedjanov', 'T. N.', ''], dtype=object)
array(['Sushkov', 'O. P.', ''], dtype=object)
array(['Cadogan', 'J. M.', ''], dtype=object)]
|
2,562 |
2104.07528
|
Kilian Kleeberger
|
Kilian Kleeberger, Markus V\"olk, Richard Bormann, Marco F. Huber
|
Investigations on Output Parameterizations of Neural Networks for Single
Shot 6D Object Pose Estimation
|
Accepted at 2021 IEEE International Conference on Robotics and
Automation (ICRA 2021)
| null | null | null |
cs.CV cs.AI cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Single shot approaches have demonstrated tremendous success on various
computer vision tasks. Finding good parameterizations for 6D object pose
estimation remains an open challenge. In this work, we propose different novel
parameterizations for the output of the neural network for single shot 6D
object pose estimation. Our learning-based approach achieves state-of-the-art
performance on two public benchmark datasets. Furthermore, we demonstrate that
the pose estimates can be used for real-world robotic grasping tasks without
additional ICP refinement.
|
[{'version': 'v1', 'created': 'Thu, 15 Apr 2021 15:29:53 GMT'}]
|
2021-04-16
|
[array(['Kleeberger', 'Kilian', ''], dtype=object)
array(['Völk', 'Markus', ''], dtype=object)
array(['Bormann', 'Richard', ''], dtype=object)
array(['Huber', 'Marco F.', ''], dtype=object)]
|
2,563 |
1003.3467
|
Xin Liu
|
Xin Liu, Jenny E. Greene, Yue Shen, Michael A. Strauss
|
Discovery of Four kpc-Scale Binary AGNs
|
accepted version; to appear in ApJL
|
Astrophysical Journal Letters 715 (2010) L30-L34
|
10.1088/2041-8205/715/1/L30
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the discovery of four kpc-scale binary AGNs. These objects were
originally selected from the Sloan Digital Sky Survey based on double-peaked [O
III] 4959,5007 emission lines in their fiber spectra. The double peaks could
result from pairing active supermassive black holes (SMBHs) in a galaxy merger,
or could be due to bulk motions of narrow-line region gas around a single SMBH.
Deep near-infrared (NIR) images and optical slit spectra obtained from the
Magellan 6.5 m and the APO 3.5 m telescopes strongly support the binary SMBH
scenario for the four objects. In each system, the NIR images reveal tidal
features and double stellar components with a projected separation of several
kpc, while optical slit spectra show two Seyfert 2 nuclei spatially coincident
with the stellar components, with line-of-sight velocity offsets of a few
hundred km/s. These objects were drawn from a sample of only 43 objects,
demonstrating the efficiency of this technique to find kpc-scale binary AGNs.
|
[{'version': 'v1', 'created': 'Wed, 17 Mar 2010 20:47:18 GMT'}
{'version': 'v2', 'created': 'Thu, 8 Apr 2010 16:51:11 GMT'}]
|
2015-05-18
|
[array(['Liu', 'Xin', ''], dtype=object)
array(['Greene', 'Jenny E.', ''], dtype=object)
array(['Shen', 'Yue', ''], dtype=object)
array(['Strauss', 'Michael A.', ''], dtype=object)]
|
2,564 |
hep-ph/9905523
|
Deog Ki Hong
|
Deog Ki Hong
|
Aspects of high density effective theory in QCD
|
23 pages, 5 figures. The gap equations are re-analyzed in the HDL
approximation
|
Nucl.Phys. B582 (2000) 451-476
|
10.1016/S0550-3213(00)00330-8
|
HUTP-99/A026, BUHEP-99-11
|
hep-ph
| null |
We study an effective theory of QCD at high density in detail, including the
finite temperature effects and the leading order correction in $1/\mu$
expansion. We investigate the Cooper pair gap equation and find that the
color-flavor locking phase is energetically preferred at high density. We also
find the color-superconducting phase transition occurs in dense quark matter
when the chemical potential is larger than $250\pm 100~{\rm MeV}$ and the
temperature is lower than 0.57 times the Cooper pair gap in the leading order
in the hard-dense-loop approximation. The quark-neutrino four-Fermi coupling
and the quark-axion coupling receive significant corrections in dense quark
matter.
|
[{'version': 'v1', 'created': 'Thu, 27 May 1999 19:53:22 GMT'}
{'version': 'v2', 'created': 'Fri, 28 May 1999 02:10:27 GMT'}
{'version': 'v3', 'created': 'Sun, 20 Jun 1999 21:27:26 GMT'}
{'version': 'v4', 'created': 'Tue, 1 Feb 2000 07:55:41 GMT'}]
|
2009-10-31
|
[array(['Hong', 'Deog Ki', ''], dtype=object)]
|
2,565 |
2206.00859
|
Chenglong Li
|
Chenglong Li, Xiaobin Yang, Guohao Wang, Aihua Zheng, Chang Tan,
Ruoran Jia, and Jin Tang
|
Disentangled Generation Network for Enlarged License Plate Recognition
and A Unified Dataset
|
Submission to CVIU
| null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
License plate recognition plays a critical role in many practical
applications, but license plates of large vehicles are difficult to be
recognized due to the factors of low resolution, contamination, low
illumination, and occlusion, to name a few. To overcome the above factors, the
transportation management department generally introduces the enlarged license
plate behind the rear of a vehicle. However, enlarged license plates have high
diversity as they are non-standard in position, size, and style. Furthermore,
the background regions contain a variety of noisy information which greatly
disturbs the recognition of license plate characters. Existing works have not
studied this challenging problem. In this work, we first address the enlarged
license plate recognition problem and contribute a dataset containing 9342
images, which cover most of the challenges of real scenes. However, the created
data are still insufficient to train deep methods of enlarged license plate
recognition, and building large-scale training data is very time-consuming and
high labor cost. To handle this problem, we propose a novel task-level
disentanglement generation framework based on the Disentangled Generation
Network (DGNet), which disentangles the generation into the text generation and
background generation in an end-to-end manner to effectively ensure diversity
and integrity, for robust enlarged license plate recognition. Extensive
experiments on the created dataset are conducted, and we demonstrate the
effectiveness of the proposed approach in three representative text recognition
frameworks.
|
[{'version': 'v1', 'created': 'Thu, 2 Jun 2022 03:26:50 GMT'}
{'version': 'v2', 'created': 'Thu, 25 May 2023 14:03:01 GMT'}]
|
2023-05-26
|
[array(['Li', 'Chenglong', ''], dtype=object)
array(['Yang', 'Xiaobin', ''], dtype=object)
array(['Wang', 'Guohao', ''], dtype=object)
array(['Zheng', 'Aihua', ''], dtype=object)
array(['Tan', 'Chang', ''], dtype=object)
array(['Jia', 'Ruoran', ''], dtype=object)
array(['Tang', 'Jin', ''], dtype=object)]
|
2,566 |
0708.4031
|
Jan Mandel
|
Jan Mandel, Bed\v{r}ich Soused\'ik
|
BDDC and FETI-DP under Minimalist Assumptions
|
11 pages, 1 figure, also available at
http://www-math.cudenver.edu/ccm/reports/
|
Computing 81(4), 269-280, 2007
|
10.1007/s00607-007-0254-y
|
UCDHSC CCM Report 255
|
math.NA
| null |
The FETI-DP, BDDC and P-FETI-DP preconditioners are derived in a particulary
simple abstract form. It is shown that their properties can be obtained from
only on a very small set of algebraic assumptions. The presentation is purely
algebraic and it does not use any particular definition of method components,
such as substructures and coarse degrees of freedom. It is then shown that
P-FETI-DP and BDDC are in fact the same. The FETI-DP and the BDDC
preconditioned operators are of the same algebraic form, and the standard
condition number bound carries over to arbitrary abstract operators of this
form. The equality of eigenvalues of BDDC and FETI-DP also holds in the
minimalist abstract setting. The abstract framework is explained on a standard
substructuring example.
|
[{'version': 'v1', 'created': 'Wed, 29 Aug 2007 22:10:07 GMT'}]
|
2014-07-17
|
[array(['Mandel', 'Jan', ''], dtype=object)
array(['Sousedík', 'Bedřich', ''], dtype=object)]
|
2,567 |
1506.07226
|
Andrew Schaug
|
Andrew Schaug
|
The Gromov-Witten Theory of Borcea-Voisin Orbifolds and Its Analytic
Continuations
|
45 pages, 1 figure
| null | null | null |
math.AG math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the early 1990s, Borcea-Voisin orbifolds were some of the ear- liest
examples of Calabi-Yau threefolds shown to exhibit mirror symmetry. However,
their quantum theory has been poorly investigated. We study this in the context
of the gauged linear sigma model, which in their case encom- passes
Gromov-Witten theory and its three companions (FJRW theory and two mixed
theories). For certain Borcea-Voisin orbifolds of Fermat type, we calculate all
four genus zero theories explicitly. Furthermore, we relate the I-functions of
these theories by analytic continuation and symplectic transfor- mation. In
particular, the relation between the Gromov-Witten and FJRW theories can be
viewed as an example of the Landau-Ginzburg/Calabi-Yau correspondence for
complete intersections of toric varieties.
|
[{'version': 'v1', 'created': 'Wed, 24 Jun 2015 02:27:38 GMT'}]
|
2015-06-25
|
[array(['Schaug', 'Andrew', ''], dtype=object)]
|
2,568 |
1512.06760
|
Anatoly Vershik M
|
A.Vershik, U.Hab\"ock
|
On the classification problem of matrix distributions of measurable
functions in several variables
|
24 pp., Ref 16
| null | null | null |
math.PR math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We resume the results from \cite{Vershik FA} on the classification of
measurable functions in several variables, with some minor corrections of
purely technical nature, and give a partial solution to the characterization
problem of so--called matrix distributions, which are the metric invariants of
measurable functions introduced in \cite{Vershik FA}. The characterization of
these invariants of the ergodic measures on the space of matrices is closely
related to Aldous' and Hoover's representation of row-- and column--exchangable
distributions \cite{Aldous1981,Hoover1982}, but not in such an obvious way as
was initially expected in \cite{Vershik FA}.
|
[{'version': 'v1', 'created': 'Thu, 17 Dec 2015 15:41:55 GMT'}]
|
2015-12-22
|
[array(['Vershik', 'A.', ''], dtype=object)
array(['Haböck', 'U.', ''], dtype=object)]
|
2,569 |
hep-ph/9606298
|
Yakov Shnir
|
Per Osland and Ya. M. Shnir
|
Dyon mass bounds from electric dipole moments
|
LaTeX + 1 figure as uuencoded PostScript file
| null | null |
University of Bergen, Scientific/Technical Report No.1996-04
|
hep-ph atom-ph
| null |
Dyon loops give a contribution to the matrix element for light-by-light
scattering that violates parity and time-reversal symmetry. This effect induces
an electric dipole moment for the electron, of order $M^{-2}$, where $M$ is the
dyon mass. The current limit on the electric dipole moment of the electron
yields the lower mass bound $M>{\cal O}(1)~\mbox{TeV}$.
|
[{'version': 'v1', 'created': 'Tue, 11 Jun 1996 16:24:51 GMT'}]
|
2007-05-23
|
[array(['Osland', 'Per', ''], dtype=object)
array(['Shnir', 'Ya. M.', ''], dtype=object)]
|
2,570 |
0902.2228
|
Luca Stefanini Dr
|
Luca Stefanini
|
On Morphic Actions and Integrability of LA-Groupoids
|
Ph.D. Thesis, 14+iv+137 Pages
| null | null | null |
math.DG math.CT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Lie theory for the integration of Lie algebroids to Lie groupoids, on the one
hand, and of Poisson manifolds to symplectic groupoids, on the other, has
undergone tremendous developements in the last decade, thanks to the work of
Mackenzie-Xu, Moerdijk-Mrcun, Cattaneo-Felder and Crainic-Fernandes, among
others. In this thesis we study - part of - the categorified version of this
story, namely the integrability of LA-groupoids (groupoid objects in the
category of Lie algebroids), to double Lie groupoids (groupoid objects in the
category of Lie groupoids) providing a first set of sufficient conditions for
the integration to be possible. Mackenzie's double Lie structures arise
naturally from lifting processes, such as the cotangent lift or the path
prolongation, on ordinary Lie theoretic and Poisson geometric objects and we
use them to study the integrability of quotient Poisson bivector fields, the
relation between "local" and "global" duality of Poisson groupoids and Lie
theory for Lie bialgebroids and Poisson groupoids.
|
[{'version': 'v1', 'created': 'Thu, 12 Feb 2009 22:55:06 GMT'}]
|
2009-02-16
|
[array(['Stefanini', 'Luca', ''], dtype=object)]
|
2,571 |
physics/0211084
|
Milan M. Cirkovic
|
Milan M. Cirkovic
|
Entropy and Eschatology: A Comment on Kutrovatz's Paper "Heat Death in
Ancient and Modern Thermodynamics"
|
13 pages, no figures
|
Open Systems and Information Dynamics 9, 291-299 (2002)
| null | null |
physics.hist-ph physics.gen-ph
| null |
Recent intriguing discussion of heat death by Kutrovatz is critically
examined. It is shown that there exists another way of answering the heat death
puzzle, already present in the ancient philosophical tradition. This
alternative route relies not only on the final duration of time (which has been
re-discovered in modern times), but also on the notion of observational
self-selection, which has received wide publicity in the last several decades
under the title of the anthropic principle(s). Although the questions Kutrovatz
raises are important and welcome, there are several errors in his treatment of
cosmology which marr his account of the entire topic. In addition, the nascent
discipline of physical eschatology holds promise of answering the basic
explanatory task concerning the future evolution of the universe without
appealing to metaphysics. This is a completely novel feature in the history of
science, in contradistinction to the historical examples discussed.
|
[{'version': 'v1', 'created': 'Tue, 19 Nov 2002 02:46:06 GMT'}]
|
2007-05-23
|
[array(['Cirkovic', 'Milan M.', ''], dtype=object)]
|
2,572 |
1609.06588
|
Valentin Blomer
|
Valentin Blomer
|
Higher order divisor problems
| null | null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An asymptotic formula is proved for the k-fold divisor function averaged over
homogeneous polynomials of degree k in k-1 variables coming from incomplete
norm forms.
|
[{'version': 'v1', 'created': 'Wed, 21 Sep 2016 14:55:52 GMT'}]
|
2016-09-22
|
[array(['Blomer', 'Valentin', ''], dtype=object)]
|
2,573 |
quant-ph/0207044
|
Eric A. Galapon
|
Eric A. Galapon
|
Shouldn't there be an antithesis to quantization?
|
Stray factors of 2Pi have been removed in equations-10, 11 and 55,
plus other minor corrections
|
Jour. Math. Phys. 45, 3180-3215 (2004)
|
10.1063/1.1767297
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We raise the possibility of developing a theory of constructing quantum
dynamical observables independent from quantization and deriving classical
dynamical observables from pure quantum mechanical consideration. We do so by
giving a detailed quantum mechanical derivation of the classical time of
arrival at arbitrary arrival points for a particle in one dimension.
|
[{'version': 'v1', 'created': 'Tue, 9 Jul 2002 03:06:56 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Sep 2004 14:24:01 GMT'}
{'version': 'v3', 'created': 'Tue, 29 Jul 2008 06:29:08 GMT'}]
|
2009-11-07
|
[array(['Galapon', 'Eric A.', ''], dtype=object)]
|
2,574 |
1205.0697
|
Randall Feenstra
|
Guowei He, N. Srivastava, R. M. Feenstra
|
Formation of Graphene on SiC(000-1) Surfaces in Disilane and Neon
Environments
|
12 pages, 6 figures; to to be published in J. Vac. Sci. Technol. B
|
J. Vac. Sci. Technol. B 30, 04E102 (2012)
|
10.1116/1.4718365
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The formation of graphene on the SiC(000-1) surface (the C-face of the {0001}
surfaces) has been studied, utilizing both disilane and neon environments. In
both cases, the interface between the graphene and the SiC is found to be
different than for graphene formation in vacuum. A complex low-energy electron
diffraction pattern with rt(43) x rt(43)-R\pm7.6{\deg} symmetry is found to
form at the interface. An interface layer consisting essentially of graphene is
observed, and it is argued that the manner in which this layer covalently bonds
to the underlying SiC produces the rt(43) x rt(43)-R\pm7.6{\deg} structure
[i.e. analogous to the 6rt(3) x 6rt(3)-R30{\deg} "buffer layer" that forms on
the SiC(0001) surface (the Si-face)]. Oxidation of the surface is found to
modify (eliminate) the rt(43) x rt(43)-R\pm7.6{\deg} structure, which is
interpreted in the same manner as the known "decoupling" that occurs for the
Si-face buffer layer.
|
[{'version': 'v1', 'created': 'Thu, 3 May 2012 12:49:02 GMT'}]
|
2015-06-05
|
[array(['He', 'Guowei', ''], dtype=object)
array(['Srivastava', 'N.', ''], dtype=object)
array(['Feenstra', 'R. M.', ''], dtype=object)]
|
2,575 |
1006.1425
|
Zhao-Long Wang
|
H. Lu and Zhao-Long Wang
|
Instability by Chern-Simons and/or Transgressions
|
18 pages, no figures, revised version to appear in JHEP
|
JHEP 1009:112,2010
|
10.1007/JHEP09(2010)112
|
USTC-ICTS-10-07
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It was demonstrated recently that there is an upper bound of the Chern-Simons
coupling of the five-dimensional Einstein-Maxwell theory, beyond which the
electrically charged AdS_2 \times S^3 vacuum solution becomes unstable. We
generalize the result to a general class of gravity theories involving
Chern-Simons and/or transgression terms and find their upper bounds for
stability. We show that supergravities with AdS \times Sphere vacua satisfy the
bounds.
|
[{'version': 'v1', 'created': 'Tue, 8 Jun 2010 01:11:52 GMT'}
{'version': 'v2', 'created': 'Mon, 19 Jul 2010 07:08:33 GMT'}
{'version': 'v3', 'created': 'Thu, 30 Sep 2010 15:27:06 GMT'}]
|
2014-11-21
|
[array(['Lu', 'H.', ''], dtype=object)
array(['Wang', 'Zhao-Long', ''], dtype=object)]
|
2,576 |
1802.09183
|
Zhen Zheng
|
Zhen Zheng, Xu-Bo Zou and Guang-Can Guo
|
Synthetic topological Kondo insulator in a pumped optical cavity
|
13 pages, 3 figures
|
New J. Phys. 20, 023039 (2018)
|
10.1088/1367-2630/aaaa50
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motivated by experimental advances on ultracold atoms coupled to a pumped
optical cavity, we propose a scheme for synthesizing and observing the Kondo
insulator in Fermi gases trapped in optical lattices. The synthetic Kondo phase
arises from the screening of localized atoms coupled to mobile ones, which in
our proposal is generated via the pumping laser as well as the cavity. By
designing the atom-cavity coupling, it can engineer a nearest-neighbor-site
Kondo coupling that plays an essential role for supporting topological Kondo
phase. Therefore, the cavity-induced Kondo transition is associated with a
nontrivial topological features, resulting in the coexistence of the
superradiant and topological Kondo state. Our proposal can be realized with
current technique, and thus has potential applications in quantum simulation of
the topological Kondo insulator in ultracold atoms.
|
[{'version': 'v1', 'created': 'Mon, 26 Feb 2018 07:01:15 GMT'}]
|
2018-02-27
|
[array(['Zheng', 'Zhen', ''], dtype=object)
array(['Zou', 'Xu-Bo', ''], dtype=object)
array(['Guo', 'Guang-Can', ''], dtype=object)]
|
2,577 |
2208.14170
|
Rodrigo Gonz\'alez-Peinado
|
R. Gonz\'alez-Peinado
|
Planetary Structure & Dynamic in Science Fiction. Scientific Analysis &
Review of Interstellar [UCM Bachelor Thesis, 2015]
|
29 pages, in Spanish language, 2015
| null | null | null |
physics.pop-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Christopher Nolan's latest blockbuster, Interstellar, has supposed a
revolution not only from a cinematographically viewpoint, but also in the
relation between current spectators and science. The aim of this report is to
analyze some features presented in Interstellar. Basic Newtonian Physics shows
how a planet orbiting a supermassive black hole like Gargantua must travel at
0.25 the speed of light in order to be in a stable orbit. Thus, this orbit is
too far from the black hole to explain the time dilatation observed in Miller's
Planet and an the orbit that could explain such a time dilatation is much more
smaller that Roche's limit. Furthermore, I explain how enormous waves as
Miller's Planet ones could appear by studying the tidal potential created by
Gargantua, obtaining a wave of 200 kilometers high, but better results are
obtained by considering a series of tsunamis in Miller's Planet. Finally, I
present an explanation to Mann's Planet ice-covered landscape in which Snowball
Earth Theory plays a fundamental role. No difficult General Relativity formulas
will be used in order to make easier the comprehension of the research.
Supervisors: M. L. Osete & J. Gorgas
|
[{'version': 'v1', 'created': 'Wed, 8 Jun 2022 09:58:13 GMT'}]
|
2022-08-31
|
[array(['González-Peinado', 'R.', ''], dtype=object)]
|
2,578 |
2301.11393
|
Andre Laestadius
|
Fabian M. Faulstich, H{\aa}kon E. Kristiansen, Mihaly A. Csirik, Simen
Kvaal, Thomas Bondo Pedersen, Andre Laestadius
|
The $S$-diagnostic -- an a posteriori error assessment for
single-reference coupled-cluster methods
| null | null | null | null |
physics.chem-ph physics.comp-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a novel a posteriori error assessment for the single-reference
coupled-cluster (SRCC) method called the $S$-diagnostic. We provide a
derivation of the $S$-diagnostic that is rooted in the mathematical analysis of
different SRCC variants. We numerically scrutinized the $S$-diagnostic, testing
its performance for (1) geometry optimizations, (2) electronic correlation
simulations of systems with varying numerical difficulty, and (3) the
square-planar copper complexes [CuCl$_4$]$^{2-}$, [Cu(NH$_3$)$_4$]$^{2+}$, and
[Cu(H$_2$O)$_4$]$^{2+}$. Throughout the numerical investigations, the
$S$-diagnostic is compared to other SRCC diagnostic procedures, that is, the
$T_1$, $D_1$, and $D_2$ diagnostics as well as different indices of
multi-determinantal and multi-reference character in coupled-cluster theory.
Our numerical investigations show that the $S$-diagnostic outperforms the
$T_1$, $D_1$, and $D_2$ diagnostics and is comparable to the indices of
multi-determinantal and multi-reference character in coupled-cluster theory in
their individual fields of applicability. The experiments investigating the
performance of the $S$-diagnostic for geometry optimizations using SRCC reveal
that the $S$-diagnostic correlates well with different error measures at a high
level of statistical relevance. The experiments investigating the performance
of the $S$-diagnostic for electronic correlation simulations show that the
$S$-diagnostic correctly predicts strong multi-reference regimes. The
$S$-diagnostic moreover correctly detects the successful SRCC computations for
[CuCl$_4$]$^{2-}$, [Cu(NH$_3$)$_4$]$^{2+}$, and [Cu(H$_2$O)$_4$]$^{2+}$, which
have been known to be misdiagnosed by $T_1$ and $D_1$ diagnostics in the past.
This shows that the $S$-diagnostic is a promising candidate for an a posteriori
diagnostic for SRCC calculations.
|
[{'version': 'v1', 'created': 'Thu, 26 Jan 2023 20:14:41 GMT'}]
|
2023-01-30
|
[array(['Faulstich', 'Fabian M.', ''], dtype=object)
array(['Kristiansen', 'Håkon E.', ''], dtype=object)
array(['Csirik', 'Mihaly A.', ''], dtype=object)
array(['Kvaal', 'Simen', ''], dtype=object)
array(['Pedersen', 'Thomas Bondo', ''], dtype=object)
array(['Laestadius', 'Andre', ''], dtype=object)]
|
2,579 |
1905.05330
|
Chunsheng An
|
C. S. An and B. Saghai
|
Orbital angular momentum of the proton and intrinsic five-quark Fock
states
|
typos corrected
|
Phys. Rev. D 99, 094039 (2019)
|
10.1103/PhysRevD.99.094039
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The orbital angular momentum ($L_q$) of the proton is studied by employing
the extended constituent quark model. Contributions from different flavors,
namely, up, down, strange, and charm quarks in the proton are investigated.
Probabilities of the intrinsic $q\bar{q}$ pairs are calculated using a
$^{3}P_{0}$ transition operator to fit the sea flavor asymmetry
$I_a=\bar{d}-\bar{u}=0.118\pm0.012$ of the proton. Our numerical results lead
to $L_q=0.158 \pm 0.014$, in agreement with $4/3I_a=0.157 \pm 0.016$, and
consistent with findings based on various other approaches.
|
[{'version': 'v1', 'created': 'Tue, 14 May 2019 00:53:49 GMT'}
{'version': 'v2', 'created': 'Mon, 27 May 2019 00:26:17 GMT'}]
|
2019-06-05
|
[array(['An', 'C. S.', ''], dtype=object)
array(['Saghai', 'B.', ''], dtype=object)]
|
2,580 |
1007.1887
|
Bastian Kubis
|
Bastian Kubis, Rebekka Schmidt
|
Radiative corrections in K --> pi l+ l- decays
|
12 pages, 9 figures; reference added, matches version published in
EPJC
|
Eur.Phys.J.C70:219-231,2010
|
10.1140/epjc/s10052-010-1442-z
|
HISKP-TH-10/17
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate radiative corrections to the flavor-changing neutral current
process K --> pi l+ l-, both for charged and neutral kaon decays. While the
soft-photon approximation is shown to work well for the muon channels, we
discuss the necessity of further phase space cuts with electrons in the final
state. It is also shown how to transfer our results to other decays such as eta
--> gamma l+ l- or omega --> pi0 l+ l-.
|
[{'version': 'v1', 'created': 'Mon, 12 Jul 2010 12:34:19 GMT'}
{'version': 'v2', 'created': 'Sun, 21 Nov 2010 12:40:38 GMT'}]
|
2010-11-23
|
[array(['Kubis', 'Bastian', ''], dtype=object)
array(['Schmidt', 'Rebekka', ''], dtype=object)]
|
2,581 |
2303.18019
|
Gary Sarwin
|
Gary Sarwin, Alessandro Carretta, Victor Staartjes, Matteo Zoli, Diego
Mazzatenta, Luca Regli, Carlo Serra, Ender Konukoglu
|
Live image-based neurosurgical guidance and roadmap generation using
unsupervised embedding
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Advanced minimally invasive neurosurgery navigation relies mainly on Magnetic
Resonance Imaging (MRI) guidance. MRI guidance, however, only provides
pre-operative information in the majority of the cases. Once the surgery
begins, the value of this guidance diminishes to some extent because of the
anatomical changes due to surgery. Guidance with live image feedback coming
directly from the surgical device, e.g., endoscope, can complement MRI-based
navigation or be an alternative if MRI guidance is not feasible. With this
motivation, we present a method for live image-only guidance leveraging a large
data set of annotated neurosurgical videos.First, we report the performance of
a deep learning-based object detection method, YOLO, on detecting anatomical
structures in neurosurgical images. Second, we present a method for generating
neurosurgical roadmaps using unsupervised embedding without assuming exact
anatomical matches between patients, presence of an extensive anatomical atlas,
or the need for simultaneous localization and mapping. A generated roadmap
encodes the common anatomical paths taken in surgeries in the training set. At
inference, the roadmap can be used to map a surgeon's current location using
live image feedback on the path to provide guidance by being able to predict
which structures should appear going forward or backward, much like a mapping
application. Even though the embedding is not supervised by position
information, we show that it is correlated to the location inside the brain and
on the surgical path. We trained and evaluated the proposed method with a data
set of 166 transsphenoidal adenomectomy procedures.
|
[{'version': 'v1', 'created': 'Fri, 31 Mar 2023 12:52:24 GMT'}]
|
2023-04-03
|
[array(['Sarwin', 'Gary', ''], dtype=object)
array(['Carretta', 'Alessandro', ''], dtype=object)
array(['Staartjes', 'Victor', ''], dtype=object)
array(['Zoli', 'Matteo', ''], dtype=object)
array(['Mazzatenta', 'Diego', ''], dtype=object)
array(['Regli', 'Luca', ''], dtype=object)
array(['Serra', 'Carlo', ''], dtype=object)
array(['Konukoglu', 'Ender', ''], dtype=object)]
|
2,582 |
1905.09059
|
Kitsuchart Pasupa
|
Wanthanee Rathasamuth, Kitsuchart Pasupa, Sissades Tongsima
|
Selection of a Minimal Number of Significant Porcine SNPs by an
Information Gain and Genetic Algorithm Hybrid Model
|
16 pages, 9 figures, preprint submitted to Malaysian Journal of
Computer Science
| null | null | null |
q-bio.QM cs.NE stat.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A panel of large number of common Single Nucleotide Polymorphisms (SNPs)
distributed across an entire porcine genome has been widely used to represent
genetic variability of pig. With the advent of SNP-array technology, a
genome-wide genetic profile of a specimen can be easily observed. Among the
large number of such variations, there exist a much smaller subset of the SNP
panel that could equally be used to correctly identify the corresponding breed.
This work presents a SNP selection heuristic that can still be used effectively
in the breed classification process. The proposed feature selection was done by
the approach of combining a filter method and a wrapper method--information
gain method and genetic algorithm--plus a feature frequency selection step,
while classification was done by support vector machine. The approach was able
to reduce the number of significant SNPs to 0.86 % of the total number of SNPs
in a swine dataset and provided a high classification accuracy of 94.80 %.
|
[{'version': 'v1', 'created': 'Wed, 22 May 2019 10:40:40 GMT'}]
|
2021-08-09
|
[array(['Rathasamuth', 'Wanthanee', ''], dtype=object)
array(['Pasupa', 'Kitsuchart', ''], dtype=object)
array(['Tongsima', 'Sissades', ''], dtype=object)]
|
2,583 |
1509.06148
|
Esther Buenzli
|
Esther Buenzli, Mark. S. Marley, D\'aniel Apai, Didier Saumon, Beth A.
Biller, Ian J.M. Crossfield, Jacqueline Radigan
|
Cloud Structure of the Nearest Brown Dwarfs II: High-amplitude
variability for Luhman 16 A and B in and out of the 0.99 micron FeH feature
|
11 pages, 7 figures. Accepted for publication in the Astrophysical
Journal
| null |
10.1088/0004-637X/812/2/163
| null |
astro-ph.SR astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The re-emergence of the 0.99 $\mu$m FeH feature in brown dwarfs of early- to
mid-T spectral type has been suggested as evidence for cloud disruption where
flux from deep, hot regions below the Fe cloud deck can emerge. The same
mechanism could account for color changes at the L/T transition and photometric
variability. We present the first observations of spectroscopic variability of
brown dwarfs covering the 0.99 $\mu$m FeH feature. We observed the spatially
resolved very nearby brown dwarf binary WISE J104915.57-531906.1 (Luhman 16AB),
a late-L and early-T dwarf, with HST/WFC3 in the G102 grism at 0.8-1.15 $\mu$m.
We find significant variability at all wavelengths for both brown dwarfs, with
peak-to-valley amplitudes of 9.3% for Luhman 16B and 4.5% for Luhman 16A. This
represents the first unambiguous detection of variability in Luhman 16A. We
estimate a rotational period between 4.5 and 5.5 h, very similar to Luhman 16B.
Variability in both components complicates the interpretation of spatially
unresolved observations. The probability for finding large amplitude
variability in any two brown dwarfs is less than 10%. Our finding may suggest
that a common but yet unknown feature of the binary is important for the
occurrence of variability. For both objects, the amplitude is nearly constant
at all wavelengths except in the deep K I feature below 0.84 $\mu$m. No
variations are seen across the 0.99 $\mu$m FeH feature. The observations lend
strong further support to cloud height variations rather than holes in the
silicate clouds, but cannot fully rule out holes in the iron clouds. We
re-evaluate the diagnostic potential of the FeH feature as a tracer of cloud
patchiness.
|
[{'version': 'v1', 'created': 'Mon, 21 Sep 2015 08:45:45 GMT'}]
|
2015-10-28
|
[array(['Buenzli', 'Esther', ''], dtype=object)
array(['Marley', 'Mark. S.', ''], dtype=object)
array(['Apai', 'Dániel', ''], dtype=object)
array(['Saumon', 'Didier', ''], dtype=object)
array(['Biller', 'Beth A.', ''], dtype=object)
array(['Crossfield', 'Ian J. M.', ''], dtype=object)
array(['Radigan', 'Jacqueline', ''], dtype=object)]
|
2,584 |
2009.03125
|
Michael Nicklas
|
Y.-S. Li, R. Borth, C. W. Hicks, A. P. Mackenzie and M. Nicklas
|
Heat-capacity measurements under uniaxial pressure using a piezo-driven
device
|
This manuscript is an extended version of the experimental methods
part of arXiv:1906.07597, which is being split into two separate papers
|
Rev. Sci. Instrum. 91, 103903 (2020)
|
10.1063/5.0021919
| null |
cond-mat.supr-con cond-mat.mtrl-sci cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the development of a technique to measure heat capacity at large
uniaxial pressure using a piezoelectric-driven device generating compressive
and tensile strain in the sample. Our setup is optimized for temperatures
ranging from 8 K down to millikelvin. Using an AC heat-capacity technique we
are able to achieve an extremely high resolution and to probe a homogeneously
strained part of the sample. We demonstrate the capabilities of our setup on
the unconventional superconductor Sr$_2$RuO$_4$. By replacing thermometer and
adjusting the remaining setup accordingly the temperature regime of the
experiment can be adapted to other temperature ranges of interest.
|
[{'version': 'v1', 'created': 'Mon, 7 Sep 2020 14:17:48 GMT'}]
|
2020-10-22
|
[array(['Li', 'Y. -S.', ''], dtype=object)
array(['Borth', 'R.', ''], dtype=object)
array(['Hicks', 'C. W.', ''], dtype=object)
array(['Mackenzie', 'A. P.', ''], dtype=object)
array(['Nicklas', 'M.', ''], dtype=object)]
|
2,585 |
1011.1607
|
Himanshu Asnani
|
Himanshu Asnani, Haim Permuter, Tsachy Weissman
|
To Feed or Not to Feed Back
|
Revised, a new algorithm to compute capacity, BAA-Action, added in
Section XI, 26 pages, 12 figures, submitted to IEEE Transactions on
Information Theory
| null |
10.1109/ISIT.2011.6033815
| null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the communication over Finite State Channels (FSCs), where the
encoder and the decoder can control the availability or the quality of the
noise-free feedback. Specifically, the instantaneous feedback is a function of
an action taken by the encoder, an action taken by the decoder, and the channel
output. Encoder and decoder actions take values in finite alphabets, and may be
subject to average cost constraints. We prove capacity results for such a
setting by constructing a sequence of achievable rates, using a simple scheme
based on 'code tree' generation, that generates channel input symbols along
with encoder and decoder actions. We prove that the limit of this sequence
exists. For a given block length and probability of error, we give an upper
bound on the maximum achievable rate. Our upper and lower bounds coincide and
hence yield the capacity for the case where the probability of initial state is
positive for all states. Further, for stationary indecomposable channels
without intersymbol interference (ISI), the capacity is given as the limit of
normalized directed information between the input and output sequence,
maximized over an appropriate set of causally conditioned distributions. As an
important special case, we consider the framework of 'to feed or not to feed
back' where either the encoder or the decoder takes binary actions, which
determine whether current channel output will be fed back to the encoder, with
a constraint on the fraction of channel outputs that are fed back. As another
special case of our framework, we characterize the capacity of 'coding on the
backward link' in FSCs, i.e. when the decoder sends limited-rate instantaneous
coded noise-free feedback on the backward link. Finally, we propose an
extension of the Blahut-Arimoto algorithm for evaluating the capacity when
actions can be cost constrained, and demonstrate its application on a few
examples.
|
[{'version': 'v1', 'created': 'Sun, 7 Nov 2010 03:49:55 GMT'}
{'version': 'v2', 'created': 'Sat, 11 Aug 2012 17:14:39 GMT'}]
|
2016-11-18
|
[array(['Asnani', 'Himanshu', ''], dtype=object)
array(['Permuter', 'Haim', ''], dtype=object)
array(['Weissman', 'Tsachy', ''], dtype=object)]
|
2,586 |
1803.05709
|
Joseph Sutcliffe
|
JE Sutcliffe, CP Jones, JE Darnbrough, KR Hallam, RS Springell, P
Ryan, T Cartwright, TB Scott
|
Low Temperature Ageing Behaviour of U-Nb $\alpha''$ Phase Alloys
| null | null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Ageing mechanisms of the U-5\,\%wtNb system have been investigated on samples
exposed to temperatures of 150$\,^{\circ}$C for up to 5000\,hours. A variety of
surface and bulk analytic techniques have been used to investigate phase,
chemical and crystallographic changes. Characterisation of microstructural
evolution was carried out through secondary electron microscopy (SEM), energy
dispersive x-ray spectroscopy (EDS), electron backscatter diffraction (EBSD),
transmission electron microscopy (TEM) and x-ray diffraction (XRD). This
investigation suggests crystallographic defects such as twinning furthers the
martensitic tendencies with ageing. Resizing of the lattice and shuffling of
atoms results in a small progression from the $\alpha''$ towards the $\alpha'$
phase.
|
[{'version': 'v1', 'created': 'Thu, 15 Mar 2018 12:29:34 GMT'}]
|
2018-03-16
|
[array(['Sutcliffe', 'JE', ''], dtype=object)
array(['Jones', 'CP', ''], dtype=object)
array(['Darnbrough', 'JE', ''], dtype=object)
array(['Hallam', 'KR', ''], dtype=object)
array(['Springell', 'RS', ''], dtype=object)
array(['Ryan', 'P', ''], dtype=object)
array(['Cartwright', 'T', ''], dtype=object)
array(['Scott', 'TB', ''], dtype=object)]
|
2,587 |
2306.03635
|
Man-To Hui
|
Man-To Hui, Michael S. P. Kelley, Denise Hung, Tim Lister, Joseph
Chatelain, Edward Gomez, and Sarah Greenstreet
|
Splitting of Long-Period Comet C/2018 F4 (PANSTARRS)
|
Accepted to AJ for publication
| null | null | null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Long-period comet C/2018 F4 (PANSTARRS) was observed to show duplicity of its
inner region in 2020 September, suggestive of a splitting event. We here
present analyses of our observations of the comet taken from the LOOK project
and the University of Hawaii 2.2 m telescope after the discovery of the
splitting. The two fragments Components A and B, estimated to be $\sim\!60$ m
to 4 km in radius, remained highly similar to each other in terms of
brightness, colour, and dust morphology throughout our observing campaign from
2020 September to 2021 December. Our fragmentation model yielded that the two
components split at a relative speed of $3.00 \pm 0.18$ m s$^{-1}$ in 2020 late
April, implying a specific energy change of $\left(5.3 \pm 2.8 \right) \times
10^3$ J kg$^{-1}$, and that Component B was subjected to a stronger
nongravitational acceleration than Component A in both the radial and normal
directions of the orbit. The obtained splitting time is broadly consistent with
the result from the dust morphology analysis, which further suggested that the
dominant dust grains were millimeter-sized and ejected at speed $\sim\!2$ m
s$^{-1}$. We postulate that the pre-split nucleus of the comet consisted of two
lobes resembling the one of 67P, or that the comet used to be a binary system
like main-belt comet 288P. Regardless, we highlight the possibility of using
observations of split comets as a feasible manner to study the bilobate shape
or binarity fraction of cometary nuclei.
|
[{'version': 'v1', 'created': 'Tue, 6 Jun 2023 12:45:14 GMT'}]
|
2023-06-07
|
[array(['Hui', 'Man-To', ''], dtype=object)
array(['Kelley', 'Michael S. P.', ''], dtype=object)
array(['Hung', 'Denise', ''], dtype=object)
array(['Lister', 'Tim', ''], dtype=object)
array(['Chatelain', 'Joseph', ''], dtype=object)
array(['Gomez', 'Edward', ''], dtype=object)
array(['Greenstreet', 'Sarah', ''], dtype=object)]
|
2,588 |
1608.08306
|
Faris B Mismar
|
Faris B. Mismar, Brian L. Evans
|
Machine Learning in Downlink Coordinated Multipoint in Heterogeneous
Networks
|
5 pages, 4 figures. arXiv admin note: text overlap with
arXiv:1812.03421
| null | null | null |
stat.ML cs.NI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a method for downlink coordinated multipoint (DL CoMP) in
heterogeneous fifth generation New Radio (NR) networks. The primary
contribution of our paper is an algorithm to enhance the trigger of DL CoMP
using online machine learning. We use support vector machine (SVM) classifiers
to enhance the user downlink throughput in a realistic frequency division
duplex network environment. Our simulation results show improvement in both the
macro and pico base station downlink throughputs due to the informed triggering
of the multiple radio streams as learned by the SVM classifier.
|
[{'version': 'v1', 'created': 'Tue, 30 Aug 2016 02:36:41 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Jul 2017 00:14:23 GMT'}
{'version': 'v3', 'created': 'Thu, 11 Jan 2018 01:24:01 GMT'}
{'version': 'v4', 'created': 'Mon, 5 Mar 2018 14:39:19 GMT'}
{'version': 'v5', 'created': 'Sun, 2 Sep 2018 03:39:34 GMT'}
{'version': 'v6', 'created': 'Fri, 1 Feb 2019 23:21:12 GMT'}]
|
2019-02-06
|
[array(['Mismar', 'Faris B.', ''], dtype=object)
array(['Evans', 'Brian L.', ''], dtype=object)]
|
2,589 |
1908.09549
|
Juergen Winkler
|
Juergen F. H. Winkler
|
Oprema -- The Relay Computer of Carl Zeiss Jena
|
33 pages, 18 figures, 2 tables
| null | null | null |
cs.GL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Oprema (Optikrechenmaschine = computer for optical calculations) was a
relay computer whose development was initiated by Herbert Kortum and which was
designed and built by a team under the leadership of Wilhelm Kaemmerer at Carl
Zeiss Jena (CZJ) in 1954 and 1955. Basic experiments, design and construction
of machine-1 were all done, partly concurrently, in the remarkably short time
of about 14 months. Shortly after the electronic G 2 of Heinz Billing in
Goettingen it was the 7th universal computer in Germany and the 1st in the GDR.
The Oprema consisted of two identical machines. One machine consisted of about
8,300 relays, 45,000 selenium rectifiers and 250 km cable. The main reason for
the construction of the Oprema was the computational needs of CZJ, which was
the leading company for optics and precision mechanics in the GDR. During its
lifetime (1955-1963) the Oprema was applied by CZJ and a number of other
institutes and companies in the GDR. The paper presents new details of the
Oprema project and of the arithmetic operations implemented in the Oprema.
Additionally, it covers briefly the lives of the two protagonists, W. Kaemmerer
and H. Kortum, and draws some comparisons with other early projects, namely
Colossus, ASCC/Mark 1 and ENIAC. Finally, it discusses the question, whether
Kortum is a German computer pioneer.
|
[{'version': 'v1', 'created': 'Mon, 26 Aug 2019 09:19:55 GMT'}]
|
2019-08-27
|
[array(['Winkler', 'Juergen F. H.', ''], dtype=object)]
|
2,590 |
1707.07012
|
Quoc Le
|
Barret Zoph, Vijay Vasudevan, Jonathon Shlens, Quoc V. Le
|
Learning Transferable Architectures for Scalable Image Recognition
| null | null | null | null |
cs.CV cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Developing neural network image classification models often requires
significant architecture engineering. In this paper, we study a method to learn
the model architectures directly on the dataset of interest. As this approach
is expensive when the dataset is large, we propose to search for an
architectural building block on a small dataset and then transfer the block to
a larger dataset. The key contribution of this work is the design of a new
search space (the "NASNet search space") which enables transferability. In our
experiments, we search for the best convolutional layer (or "cell") on the
CIFAR-10 dataset and then apply this cell to the ImageNet dataset by stacking
together more copies of this cell, each with their own parameters to design a
convolutional architecture, named "NASNet architecture". We also introduce a
new regularization technique called ScheduledDropPath that significantly
improves generalization in the NASNet models. On CIFAR-10 itself, NASNet
achieves 2.4% error rate, which is state-of-the-art. On ImageNet, NASNet
achieves, among the published works, state-of-the-art accuracy of 82.7% top-1
and 96.2% top-5 on ImageNet. Our model is 1.2% better in top-1 accuracy than
the best human-invented architectures while having 9 billion fewer FLOPS - a
reduction of 28% in computational demand from the previous state-of-the-art
model. When evaluated at different levels of computational cost, accuracies of
NASNets exceed those of the state-of-the-art human-designed models. For
instance, a small version of NASNet also achieves 74% top-1 accuracy, which is
3.1% better than equivalently-sized, state-of-the-art models for mobile
platforms. Finally, the learned features by NASNet used with the Faster-RCNN
framework surpass state-of-the-art by 4.0% achieving 43.1% mAP on the COCO
dataset.
|
[{'version': 'v1', 'created': 'Fri, 21 Jul 2017 18:10:26 GMT'}
{'version': 'v2', 'created': 'Wed, 25 Oct 2017 01:37:56 GMT'}
{'version': 'v3', 'created': 'Fri, 1 Dec 2017 07:48:01 GMT'}
{'version': 'v4', 'created': 'Wed, 11 Apr 2018 05:12:21 GMT'}]
|
2018-04-12
|
[array(['Zoph', 'Barret', ''], dtype=object)
array(['Vasudevan', 'Vijay', ''], dtype=object)
array(['Shlens', 'Jonathon', ''], dtype=object)
array(['Le', 'Quoc V.', ''], dtype=object)]
|
2,591 |
hep-ph/0104162
|
Giulia Zanderighi
|
A. Banfi, Yu.L. Dokshitzer, G. Marchesini and G. Zanderighi
|
QCD analysis of D-parameter in near-to-planar three-jet events
|
26 pages, 6 figures, JHEP class included
|
JHEP 0105 (2001) 040
|
10.1088/1126-6708/2001/05/040
| null |
hep-ph
| null |
We present the QCD analysis of D-parameter distribution in near-to-planar
3-jet e+e- annihilation events. We derive the all-order resummed perturbative
prediction and the leading power suppressed non-perturbative corrections both
to the mean value and the distribution. Here non-perturbative corrections are
larger than in 2-jet shape observables, so that higher order non-perturbative
effects could be relevant. Experimental data (not yet available) are needed in
order to cast light on this important point. The technique we develop aims at
improving the accuracy of the theoretical description of multi-jet ensembles,
in particular in hadron-hadron collisions.
|
[{'version': 'v1', 'created': 'Tue, 17 Apr 2001 15:17:43 GMT'}]
|
2009-11-07
|
[array(['Banfi', 'A.', ''], dtype=object)
array(['Dokshitzer', 'Yu. L.', ''], dtype=object)
array(['Marchesini', 'G.', ''], dtype=object)
array(['Zanderighi', 'G.', ''], dtype=object)]
|
2,592 |
cond-mat/0110195
|
Yoshihiro Nishiyama
|
Yoshihiro Nishiyama
|
Strong-coupling-expansion analysis of the false-vacuum decay rate of the
lattice phi^4 model in 1+1 dimensions
| null |
J.Phys.A34:11215-11224,2001
|
10.1088/0305-4470/34/50/304
| null |
cond-mat.stat-mech
| null |
Strong-coupling expansion is performed for the lattice phi^4 model in 1+1
dimensions. Because the strong-coupling limit itself is not solvable, we
employed numerical calculations so as to set up unperturbed eigensystems.
Restricting the number of Hilbert-space bases, we performed linked-cluster
expansion up to eleventh order. We carried out alternative simulation by means
of the density-matrix renormalization group. Thereby, we confirmed that our
series-expansion data with a convergence-acceleration trick are in good
agreement with the simulation result. Through the analytic continuation to the
domain of negative biquadratic interaction, we obtain the false-vacuum decay
rate. Contrary to common belief that tunnelling phenomenon lies out of
perturbative treatments, our series expansion reproduces the instanton-theory
behaviour for high potential barrier. For shallow barrier, on the contrary, our
result tells that the relaxation is no more described by instanton, but the
decay rate acquires notable enhancement.
|
[{'version': 'v1', 'created': 'Wed, 10 Oct 2001 06:59:04 GMT'}]
|
2008-11-26
|
[array(['Nishiyama', 'Yoshihiro', ''], dtype=object)]
|
2,593 |
2011.10885
|
Gourav Wadhwa
|
Gourav Wadhwa, Amandeep Kharb, Satyam Mishra, Mohit Kumar, Shreyansh
Srivastav
|
A Comprehensive Survey on Real-Time Voltage Stability Assessment for
Power Systems
|
Accepted at IEEE International Conference on Industrial and
Information Systems (ICIIS), 2020
| null | null | null |
eess.SY cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Accurate real-time assessment of power systems voltage stability has been an
active area of research in the past few decades. In the past decade, after the
development of phasor measurement units (PMU), a lot of discussions has been
going on phasor measurement techniques for real-time voltage stability. The
fundamental idea behind these methods is to find the Thevenin equivalents of
the system, and then determine the voltage stability margin based on the
equivalent circuits. Some approaches also include the use of Artificial Neural
Networks (ANN), for online monitoring of voltage stability margins. These
methods are really fast as compared to the other methods. It has been shown
that if we can obtain the phase angles and voltage magnitude in real-time from
the phasor measurement units (PMU), then the voltage stability margins can be
obtained in real-time and we can initiate voltage stability control methods. We
are going to discuss Thevenin's equivalent methods and Artificial Intelligence
methods in detail in this paper. We will also introduce the traditional methods
which were earlier used for power systems stability assessment such as Time
Domain methods, Static Methods, and Sensitivity methods. We are going to
finally compare these methods and try to give general guidance on choosing a
power stability method.
|
[{'version': 'v1', 'created': 'Sat, 21 Nov 2020 22:17:21 GMT'}]
|
2020-11-24
|
[array(['Wadhwa', 'Gourav', ''], dtype=object)
array(['Kharb', 'Amandeep', ''], dtype=object)
array(['Mishra', 'Satyam', ''], dtype=object)
array(['Kumar', 'Mohit', ''], dtype=object)
array(['Srivastav', 'Shreyansh', ''], dtype=object)]
|
2,594 |
2106.10923
|
Tomoya Sakai
|
Tomoya Sakai
|
Unsupervised Deep Learning by Injecting Low-Rank and Sparse Priors
| null | null | null | null |
cs.CV eess.IV
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
What if deep neural networks can learn from sparsity-inducing priors? When
the networks are designed by combining layer modules (CNN, RNN, etc), engineers
less exploit the inductive bias, i.e., existing well-known rules or prior
knowledge, other than annotated training data sets. We focus on employing
sparsity-inducing priors in deep learning to encourage the network to concisely
capture the nature of high-dimensional data in an unsupervised way. In order to
use non-differentiable sparsity-inducing norms as loss functions, we plug their
proximal mappings into the automatic differentiation framework. We demonstrate
unsupervised learning of U-Net for background subtraction using low-rank and
sparse priors. The U-Net can learn moving objects in a training sequence
without any annotation, and successfully detect the foreground objects in test
sequences.
|
[{'version': 'v1', 'created': 'Mon, 21 Jun 2021 08:41:02 GMT'}]
|
2021-06-22
|
[array(['Sakai', 'Tomoya', ''], dtype=object)]
|
2,595 |
1712.03721
|
Domenico Truzzolillo
|
Domenico Truzzolillo, Simona Sennato, Stefano Sarti, Stefano
Casciardi, Chiara Bazzoni and Federico Bordi
|
Overcharging and reentrant condensation of thermoresponsive ionic
microgels
|
15 Figures
|
Soft Matter, 2018,14, 4110-4125
|
10.1039/C7SM02357J
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigated the complexation of thermoresponsive anionic
poly(N-isopropylacrylamide) (PNiPAM) microgels and cationic
$\epsilon$-polylysine ($\epsilon$-PLL) chains. By combining electrophoresis,
light scattering, transmission electron microscopy (TEM) and dielectric
spectroscopy (DS) we studied the adsorption of $\epsilon$-PLL onto the microgel
networks and its effect on the stability of the suspensions. We show that the
volume phase transition (VPT) of the microgels triggers a large polyion
adsorption. Two interesting phenomena with unique features occur: a
temperature-dependent microgel overcharging and a complex reentrant
condensation. The latter may occur at fixed polyion concentration, when
temperature is raised above the VPT of microgels, or by increasing the number
density of polycations at fixed temperature. TEM and DS measurements
unambiguously show that short PLL chains adsorb onto microgels and act as
electrostatic glue above the VPT. By performing thermal cycles, we further show
that polyion-induced clustering is a quasi-reversible process: within the time
of our experiments large clusters form above the VPT and partially re-dissolve
as the mixtures are cooled down. Finally we give a proof that the observed
phenomenology is purely electrostatic in nature: an increase of the ionic
strength gives rise to the polyion desorption from the microgel outer shell.
|
[{'version': 'v1', 'created': 'Mon, 11 Dec 2017 11:26:51 GMT'}
{'version': 'v2', 'created': 'Thu, 7 Feb 2019 13:43:01 GMT'}]
|
2019-02-08
|
[array(['Truzzolillo', 'Domenico', ''], dtype=object)
array(['Sennato', 'Simona', ''], dtype=object)
array(['Sarti', 'Stefano', ''], dtype=object)
array(['Casciardi', 'Stefano', ''], dtype=object)
array(['Bazzoni', 'Chiara', ''], dtype=object)
array(['Bordi', 'Federico', ''], dtype=object)]
|
2,596 |
hep-ph/0107211
|
Krishna Rajagopal
|
Cristina Manuel (CERN), Krishna Rajagopal (MIT)
|
Illuminating Dense Quark Matter
|
4 pages, 1 figure
|
Phys.Rev.Lett. 88 (2002) 042003
|
10.1103/PhysRevLett.88.042003
|
CERN-TH-2001-191, MIT-CTP-3165
|
hep-ph astro-ph cond-mat.supr-con hep-th nucl-th
| null |
We imagine shining light on a lump of cold dense quark matter, in the CFL
phase and therefore a transparent insulator. We calculate the angles of
reflection and refraction, and the intensity of the reflected and refracted
light. Although the only potentially observable context for this phenomenon
(reflection of light from and refraction of light through an illuminated quark
star) is unlikely to be realized, our calculation casts new light on the old
idea that confinement makes the QCD vacuum behave as if filled with a
condensate of color-magnetic monopoles.
|
[{'version': 'v1', 'created': 'Thu, 19 Jul 2001 16:10:27 GMT'}]
|
2009-11-07
|
[array(['Manuel', 'Cristina', '', 'CERN'], dtype=object)
array(['Rajagopal', 'Krishna', '', 'MIT'], dtype=object)]
|
2,597 |
1908.02684
|
Sayantan Banerjee
|
Sayantan Banerjee
|
Bayesian Structure Learning in Graphical Models using Shrinkage priors
|
This is an extended abstract version of the ongoing work
| null | null | null |
math.ST stat.ME stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the problem of learning the structure of a high dimensional
precision matrix under sparsity assumptions. We propose to use a shrinkage
prior, called the DL-graphical prior based on the Dirichlet-Laplace prior used
for the Gaussian mean problem. A posterior sampling scheme based on Gibbs
sampling is also provided along with theoretical guarantees of the method by
obtaining the posterior convergence rate of the precision matrix.
|
[{'version': 'v1', 'created': 'Fri, 26 Jul 2019 06:21:52 GMT'}]
|
2019-08-08
|
[array(['Banerjee', 'Sayantan', ''], dtype=object)]
|
2,598 |
2306.14448
|
Weinan Song
|
Weinan Song, Yaxuan Zhu, Lei He, Yingnian Wu, and Jianwen Xie
|
Progressive Energy-Based Cooperative Learning for Multi-Domain
Image-to-Image Translation
| null | null | null | null |
cs.CV cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
This paper studies a novel energy-based cooperative learning framework for
multi-domain image-to-image translation. The framework consists of four
components: descriptor, translator, style encoder, and style generator. The
descriptor is a multi-head energy-based model that represents a multi-domain
image distribution. The components of translator, style encoder, and style
generator constitute a diversified image generator. Specifically, given an
input image from a source domain, the translator turns it into a stylised
output image of the target domain according to a style code, which can be
inferred by the style encoder from a reference image or produced by the style
generator from a random noise. Since the style generator is represented as an
domain-specific distribution of style codes, the translator can provide a
one-to-many transformation (i.e., diversified generation) between source domain
and target domain. To train our framework, we propose a likelihood-based
multi-domain cooperative learning algorithm to jointly train the multi-domain
descriptor and the diversified image generator (including translator, style
encoder, and style generator modules) via multi-domain MCMC teaching, in which
the descriptor guides the diversified image generator to shift its probability
density toward the data distribution, while the diversified image generator
uses its randomly translated images to initialize the descriptor's Langevin
dynamics process for efficient sampling.
|
[{'version': 'v1', 'created': 'Mon, 26 Jun 2023 06:34:53 GMT'}]
|
2023-06-27
|
[array(['Song', 'Weinan', ''], dtype=object)
array(['Zhu', 'Yaxuan', ''], dtype=object)
array(['He', 'Lei', ''], dtype=object)
array(['Wu', 'Yingnian', ''], dtype=object)
array(['Xie', 'Jianwen', ''], dtype=object)]
|
2,599 |
1512.07794
|
O. Pizio
|
E. Galicia-Andr\'es, H. Dominguez, L. Pusztai, O. Pizio
|
On the composition dependence of thermodynamic, dynamic and dielectric
properties of water-methanol model mixtures. Molecular dynamics simulation
results
|
14 pages, 10 figures
|
Condens. Matter Phys., 2015, vol. 18, No. 4, 43602
|
10.5488/CMP.18.43602
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have investigated thermodynamic and dynamic properties as well as the
dielectric constant of water-metha\-nol model mixtures in the entire range of
composition by using constant pressure molecular dynamics simulations at
ambient conditions. The SPC/E and TIP4P/Ew water models are used in combination
with the OPLS united atom modelling for methanol. Changes of the average number
of hydrogen bonds between particles of different species and of the fractions
of differently bonded molecules are put in correspondence with the behavior of
excess mixing volume and enthalpy, of self-diffusion coefficients and
rotational relaxation times. From the detailed analyses of the results obtained
in this work, we conclude that an improvement of the description of an ample
set of properties of water-methanol mixtures can possibly be reached, if a more
sophisticated, carefully parameterized, e.g., all atom, model for methanol is
used. Moreover, exploration of parametrization of the methanol force field,
with simultaneous application of different combination rules for methanol-water
cross interactions, is required.
|
[{'version': 'v1', 'created': 'Thu, 24 Dec 2015 11:30:21 GMT'}]
|
2015-12-25
|
[array(['Galicia-Andrés', 'E.', ''], dtype=object)
array(['Dominguez', 'H.', ''], dtype=object)
array(['Pusztai', 'L.', ''], dtype=object)
array(['Pizio', 'O.', ''], dtype=object)]
|
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