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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
17,800 |
1201.0899
|
Stefan Schwede
|
Stefan Schwede
|
Topological triangulated categories
|
59 pages
|
published in two parts as: The n-order of algebraic triangulated
categories, J Topol 6 (2013), 857-867, and: The p-order of topological
triangulated categories, J Topol 6 (2013), 868-914
|
10.1112/jtopol/jtt014, 10.1112/jtopol/jtt018
| null |
math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we explain certain systematic differences between algebraic and
topological triangulated categories. A triangulated category is algebraic if it
admits a differential graded model, and topological if it admits a model in the
form of a stable cofibration category. The precise statements use the 'n-order'
of a triangulated category, for a natural number n. The n-order is a
non-negative integer (or infinity) and measures `how strongly' n annihilates
objects of the form Y/n. We show the following results: the n-order of an
algebraic triangulated category is infinite; for every prime p, the p-order of
a topological triangulated category is at least p-1; the p-order of the p-local
stable homotopy category is exactly p-1. In particular, the p-local stable
homotopy category is not algebraic for any prime p. As a tool we develop
certain foundations about enrichments of cofibration categories by Delta-sets;
in particular we generalize the theory of `framings' (or `cosimplicial
resolutions') from model categories to cofibration categories.
|
[{'version': 'v1', 'created': 'Wed, 4 Jan 2012 14:31:16 GMT'}]
|
2013-11-28
|
[array(['Schwede', 'Stefan', ''], dtype=object)]
|
17,801 |
1609.02060
|
Jason X. Prochaska
|
J. Xavier Prochaska (1), Chris Ratliff (1), Jerry Cabak (1), Alex
Tripsas (1), Sean Adkins (2), Michael Bolte (1), David Cowley (1), Mike
Dahler (2), Will Deich (1), Hilton Lewis (2), Jerry Nelson (1), Sam Park (2),
Michael Peck (1), Drew Phillips (1), Mike Pollard (2), Bill Randolph (2),
Dale Sanford (1), Jim Ward (1), Truman Wold (2) ((1) University of California
Observatories, (2) W.M. Keck Observatory)
|
Detailed Design of a Deployable Tertiary Mirror for the Keck I Telescope
|
22 pages; many figures; Published in SPIE
| null |
10.1117/12.2233237
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motivated by the ever increasing pursuit of science with the transient sky
(dubbed Time Domain Astronomy or TDA), we are fabricating and will commission a
new deployable tertiary mirror for the Keck I telescope (K1DM3) at the W.M.
Keck Observatory. This paper presents the detailed design of K1DM3 with
emphasis on the opto-mechanics. This project has presented several design
challenges. Foremost are the competing requirements to avoid vignetting the
light path when retracted against a sufficiently rigid system for
high-precision and repeatable pointing. The design utilizes an actuated swing
arm to retract the mirror or deploy it into a kinematic coupling. The K1DM3
project has also required the design and development of custom connections to
provide power, communications, and compressed air to the system. This NSF-MRI
funded project is planned to be commissioned in Spring 2017.
|
[{'version': 'v1', 'created': 'Wed, 7 Sep 2016 16:44:34 GMT'}]
|
2017-01-18
|
[array(['Prochaska', 'J. Xavier', ''], dtype=object)
array(['Ratliff', 'Chris', ''], dtype=object)
array(['Cabak', 'Jerry', ''], dtype=object)
array(['Tripsas', 'Alex', ''], dtype=object)
array(['Adkins', 'Sean', ''], dtype=object)
array(['Bolte', 'Michael', ''], dtype=object)
array(['Cowley', 'David', ''], dtype=object)
array(['Dahler', 'Mike', ''], dtype=object)
array(['Deich', 'Will', ''], dtype=object)
array(['Lewis', 'Hilton', ''], dtype=object)
array(['Nelson', 'Jerry', ''], dtype=object)
array(['Park', 'Sam', ''], dtype=object)
array(['Peck', 'Michael', ''], dtype=object)
array(['Phillips', 'Drew', ''], dtype=object)
array(['Pollard', 'Mike', ''], dtype=object)
array(['Randolph', 'Bill', ''], dtype=object)
array(['Sanford', 'Dale', ''], dtype=object)
array(['Ward', 'Jim', ''], dtype=object)
array(['Wold', 'Truman', ''], dtype=object)]
|
17,802 |
astro-ph/0011362
|
Chang Won Lee
|
Chang Won Lee, Se-Hyung Cho, and Sung-Min Lee
|
A Spectral Line Survey from 138.3 to 150.7 GHZ toward Orion-KL
|
10 figures, 2 tex files for a manuscript and tables, accepted to ApJ
| null |
10.1086/320062
| null |
astro-ph
| null |
We present the results of a spectral line survey from 138.3 to 150.7 GHz
toward Orion-KL. The observations were made using the 14 m radio telescope of
Taeduk Radio Astronomy Observatory. Typical system temperatures were between
500 and 700 K, with the sensitivity between $0.02 - 0.06$ K in units of $\rm
T_A^*$.
A total of 149 line spectra are detected in this survey. Fifty lines have
been previously reported, however we find 99 new detections. Among these new
lines, 32 are `unidentified', while 67 are from molecular transitions with
known identifications. There is no detection of H or He recombination lines.
The identified spectra are from a total of 16 molecular species and their
isotopic variants. In the range from 138.3 to 150.7 GHz, the strongest spectral
line is the J=3-2 transition of CS molecule, followed by transitions of the
$\rm H_2CO$, $\rm CH_3OH$, $\rm CH_3CN$, and $\rm SO_2$. Spectral lines from
the large organic molecules such as $\rm CH_3OH$, $\rm CH_3OCH_3$, $\rm
HCOOCH_3$, $\rm C_2H_5CN$ and $\rm CH_3CN$ are prominent; with 80 % of the
identified lines arising from transitions of these molecules. The rotational
temperatures and column densities are derived using the standard rotation
diagram analysis for $\rm CH_3OH$ ($\rm ^{13}CH_3OH$), $\rm HCOOCH_3$, $\rm
CH_3CN$ and $\rm SO_2$ with $\rm 10\sim 270 K$ and $\rm 0.2\sim 20\times
10^{15} cm^{-2}$. These estimates are fairly comparable to the values for the
same molecule in other frequency regions by other studies.
|
[{'version': 'v1', 'created': 'Mon, 20 Nov 2000 13:20:51 GMT'}]
|
2009-10-31
|
[array(['Lee', 'Chang Won', ''], dtype=object)
array(['Cho', 'Se-Hyung', ''], dtype=object)
array(['Lee', 'Sung-Min', ''], dtype=object)]
|
17,803 |
2101.09782
|
Pramuditha Perera
|
Pramuditha Perera, Vishal Patel
|
A Joint Representation Learning and Feature Modeling Approach for
One-class Recognition
|
ICPR Accepted
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One-class recognition is traditionally approached either as a representation
learning problem or a feature modeling problem. In this work, we argue that
both of these approaches have their own limitations; and a more effective
solution can be obtained by combining the two. The proposed approach is based
on the combination of a generative framework and a one-class classification
method. First, we learn generative features using the one-class data with a
generative framework. We augment the learned features with the corresponding
reconstruction errors to obtain augmented features. Then, we qualitatively
identify a suitable feature distribution that reduces the redundancy in the
chosen classifier space. Finally, we force the augmented features to take the
form of this distribution using an adversarial framework. We test the
effectiveness of the proposed method on three one-class classification tasks
and obtain state-of-the-art results.
|
[{'version': 'v1', 'created': 'Sun, 24 Jan 2021 19:51:46 GMT'}]
|
2021-01-26
|
[array(['Perera', 'Pramuditha', ''], dtype=object)
array(['Patel', 'Vishal', ''], dtype=object)]
|
17,804 |
1502.06002
|
Eleftherios Nikolidakis
|
Anastasios D. Delis, Eleftherios N. Nikolidakis
|
Sharp integral inequalities for the dyadic maximal operator and
applications
|
We need to split this article in order to simplify and organize our
results. The first one is this replacement. The second will follow
| null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a sharp integral inequality for the dyadic maximal operator,
connecting integrals of $\phi$, and of the dyadic maximal function of $\phi$.
|
[{'version': 'v1', 'created': 'Mon, 15 Dec 2014 14:14:30 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Feb 2015 08:30:42 GMT'}
{'version': 'v3', 'created': 'Wed, 11 Mar 2015 05:48:04 GMT'}
{'version': 'v4', 'created': 'Sat, 27 Jun 2015 17:53:32 GMT'}
{'version': 'v5', 'created': 'Fri, 17 Jul 2015 07:21:21 GMT'}
{'version': 'v6', 'created': 'Thu, 31 Dec 2015 06:24:02 GMT'}
{'version': 'v7', 'created': 'Tue, 12 Apr 2016 15:35:41 GMT'}
{'version': 'v8', 'created': 'Sun, 5 Feb 2017 15:45:40 GMT'}]
|
2017-02-07
|
[array(['Delis', 'Anastasios D.', ''], dtype=object)
array(['Nikolidakis', 'Eleftherios N.', ''], dtype=object)]
|
17,805 |
hep-th/9506018
|
Robert W. Brown
|
Robert W. Brown
|
Understanding Something About Nothing: Radiation Zeros
|
12 pages, revtex. Two minor figures can be obtained by request; to
appear in the Proceedings of the International Symposium on Vector Boson
Self-Interactions, UCLA, Feb. 1-3, 1995
| null |
10.1063/1.49310
|
CWRUTH-95-03, March, 1995
|
hep-th hep-ph
| null |
Radiation symmetry is briefly reviewed, along with its historical,
experimental, computational, and theoretical relevance. A sketch of the proof
of a theorem for radiation zeros is used to highlight the connection between
gauge-boson couplings and Poincare transformations. It is emphasized that while
mostly bad things happen to good zeros, the weak-boson self-couplings continue
to be intimately tied to the best examples of exact or approximate zeros.
|
[{'version': 'v1', 'created': 'Fri, 2 Jun 1995 15:55:02 GMT'}]
|
2009-10-28
|
[array(['Brown', 'Robert W.', ''], dtype=object)]
|
17,806 |
hep-th/0105099
|
Robert Marnelius
|
Simon Lyakhovich, Robert Marnelius
|
Extended observables in theories with constraints
|
26 pages, Latexfile,Minor misprints on page 4 are corrected
|
Int.J.Mod.Phys. A16 (2001) 4271-4296
|
10.1142/S0217751X01005316
| null |
hep-th
| null |
In a classical Hamiltonian theory with second class constraints the phase
space functions on the constraint surface are observables. We give general
formulas for extended observables, which are expressions representing the
observables in the enveloping unconstrained phase space. These expressions
satisfy in the unconstrained phase space a Poisson algebra of the same form as
the Dirac bracket algebra of the observables on the constraint surface. The
general formulas involve new differential operators that differentiate the
Dirac bracket. Similar extended observables are also constructed for theories
with first class constraints which, however, are gauge dependent. For such
theories one may also construct gauge invariant extensions with similar
properties. Whenever extended observables exist the theory is expected to allow
for a covariant quantization. A mapping procedure is proposed for covariant
quantization of theories with second class constraints.
|
[{'version': 'v1', 'created': 'Fri, 11 May 2001 10:03:21 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Dec 2001 12:03:34 GMT'}]
|
2009-11-07
|
[array(['Lyakhovich', 'Simon', ''], dtype=object)
array(['Marnelius', 'Robert', ''], dtype=object)]
|
17,807 |
1208.1572
|
Alex Bernardini Dr.
|
Manuela G. Rodrigues and Alex E. Bernardini
|
Accretion of non-minimally coupled generalized Chaplygin gas into black
holes
|
13 pages, 03 figures
|
Int. J. Mod. Phys. D21, 1250075 (2012)
|
10.1142/S0218271812500757
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The mass evolution of Schwarzschild black holes by the absorption of scalar
fields is investigated in the scenario of the generalized Chaplygin gas (GCG).
The GCG works as a unification picture of dark matter plus dark energy that
naturally accelerates the expansion of the Universe. Through elements of the
quasi-stationary approach, we consider the mass evolution of Schwarzschild
black holes accreted by non-minimally coupled cosmological scalar fields
reproducing the dynamics of the GCG. As a scalar field non-minimally coupled to
the metrics, such an exotic content has been interconnected with accreting
black holes. The black hole increasing masses by the absorption of the gas
reflects some consistence of the accretion mechanism with the hypothesis of the
primordial origin of supermassive black holes. Our results effectively show
that the non-minimal coupling with the GCG dark sector accelerates the
increasing of black hole masses. Meanwhile some exotic features can also be
depicted for specific ranges of the non-minimal coupling in which the GCG
dynamics is substantially modified.
|
[{'version': 'v1', 'created': 'Wed, 8 Aug 2012 03:53:53 GMT'}]
|
2015-08-04
|
[array(['Rodrigues', 'Manuela G.', ''], dtype=object)
array(['Bernardini', 'Alex E.', ''], dtype=object)]
|
17,808 |
2303.00571
|
Fabio Widmer
|
Fabio Widmer and Andreas Ritter and Mathias Achermann and Fabian
B\"ueler and Joshua Bagajo and Christopher H. Onder
|
Highly Efficient Year-Round Energy and Comfort Optimization of HVAC
Systems in Electric City Buses
|
This work has been accepted to IFAC for publication under a Creative
Commons Licence CC-BY-NC-ND
| null | null | null |
eess.SY cs.SY
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
In this paper, we present a novel approach to perform highly efficient
numerical simulations of the heating, ventilation, and air-conditioning (HVAC)
system of an electric city bus. The models for this simulation are based on the
assumption of a steady-state operation. We show two approaches to obtain the
minimum energy requirement for a certain thermal comfort criterion under
specific ambient conditions. Due to the computationally efficient approach
developed, we can evaluate the model on a large dataset of 7500 scenarios in
various ambient conditions to estimate the year-round performance of the system
subject to different comfort requirements. Compared to a heating strategy based
on positive temperature coefficient (PTC) elements, we can thus show that a
heat pump (HP) can reduce the annual mean power consumption by up to 60%.
Ceiling-mounted radiant heating elements complementing a PTC heating system can
reduce the annual mean power consumption by up to 10%, while they cannot
improve the energy efficiency when used in conjunction with a HP. Finally, a
broad sensitivity study reveals the fact that improving the HP's heating-mode
coefficient of performance (COP) manifests the largest leverage in terms of
mean annual power consumption. Moreover, the annual energy expenditure for
cooling are around eight times smaller than those for heating. The case study
considered thus reveals that the advantages of improving the COP of the cooling
mode are significantly lower.
|
[{'version': 'v1', 'created': 'Wed, 1 Mar 2023 15:16:12 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Apr 2023 15:36:05 GMT'}]
|
2023-04-07
|
[array(['Widmer', 'Fabio', ''], dtype=object)
array(['Ritter', 'Andreas', ''], dtype=object)
array(['Achermann', 'Mathias', ''], dtype=object)
array(['Büeler', 'Fabian', ''], dtype=object)
array(['Bagajo', 'Joshua', ''], dtype=object)
array(['Onder', 'Christopher H.', ''], dtype=object)]
|
17,809 |
1210.1824
|
Fionntan Roukema Ph.D.
|
Fionntan Roukema
|
Exceptional Slopes on Manifolds of Small Complexity
|
53 pages, 22 Tables, 5 figure. This is an extended version of the
original article which contains more working
| null | null | null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It has been observed that most manifolds in the Callahan-Hildebrand-Weeks
census of cusped hyperbolic $3$-manifolds are obtained by surgery on the
minimally twisted 5-chain link. A full classification of the exceptional
surgeries on the 5-chain link has recently been completed. In this article, we
provide a complete classification of the sets of exceptional slopes and
fillings for all cusped hyperbolic surgeries on the minimally twisted 5-chain
link, thereby describing the sets of exceptional slopes and fillings for most
hyperbolic manifolds of small complexity. The classification produces the
description of exceptional fillings for many families of one and two cusped
manifolds, and provides supporting evidence for some well-known conjectures.
One such family that appears in the classification is an infinite family of
1-cusped hyperbolic manifolds with four Seifert manifold fillings and a
toroidal filling.
|
[{'version': 'v1', 'created': 'Fri, 5 Oct 2012 17:46:41 GMT'}
{'version': 'v2', 'created': 'Tue, 25 Jun 2013 16:53:30 GMT'}
{'version': 'v3', 'created': 'Fri, 30 Oct 2015 18:41:29 GMT'}]
|
2015-11-02
|
[array(['Roukema', 'Fionntan', ''], dtype=object)]
|
17,810 |
2208.11547
|
Lumin Xu
|
Lumin Xu, Sheng Jin, Wentao Liu, Chen Qian, Wanli Ouyang, Ping Luo,
Xiaogang Wang
|
ZoomNAS: Searching for Whole-body Human Pose Estimation in the Wild
|
Accepted by TPAMI
| null |
10.1109/TPAMI.2022.3197352
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper investigates the task of 2D whole-body human pose estimation,
which aims to localize dense landmarks on the entire human body including body,
feet, face, and hands. We propose a single-network approach, termed ZoomNet, to
take into account the hierarchical structure of the full human body and solve
the scale variation of different body parts. We further propose a neural
architecture search framework, termed ZoomNAS, to promote both the accuracy and
efficiency of whole-body pose estimation. ZoomNAS jointly searches the model
architecture and the connections between different sub-modules, and
automatically allocates computational complexity for searched sub-modules. To
train and evaluate ZoomNAS, we introduce the first large-scale 2D human
whole-body dataset, namely COCO-WholeBody V1.0, which annotates 133 keypoints
for in-the-wild images. Extensive experiments demonstrate the effectiveness of
ZoomNAS and the significance of COCO-WholeBody V1.0.
|
[{'version': 'v1', 'created': 'Tue, 23 Aug 2022 16:33:57 GMT'}]
|
2022-08-25
|
[array(['Xu', 'Lumin', ''], dtype=object)
array(['Jin', 'Sheng', ''], dtype=object)
array(['Liu', 'Wentao', ''], dtype=object)
array(['Qian', 'Chen', ''], dtype=object)
array(['Ouyang', 'Wanli', ''], dtype=object)
array(['Luo', 'Ping', ''], dtype=object)
array(['Wang', 'Xiaogang', ''], dtype=object)]
|
17,811 |
1807.06645
|
Christian Coester
|
Christian Coester, Elias Koutsoupias
|
The Online $k$-Taxi Problem
| null | null | null | null |
cs.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the online $k$-taxi problem, a generalization of the $k$-server
problem, in which $k$ taxis serve a sequence of requests in a metric space. A
request consists of two points $s$ and $t$, representing a passenger that wants
to be carried by a taxi from $s$ to $t$. The goal is to serve all requests
while minimizing the total distance traveled by all taxis. The problem comes in
two flavors, called the easy and the hard $k$-taxi problem: In the easy
$k$-taxi problem, the cost is defined as the total distance traveled by the
taxis; in the hard $k$-taxi problem, the cost is only the distance of empty
runs.
The hard $k$-taxi problem is substantially more difficult than the easy
version with at least an exponential deterministic competitive ratio,
$\Omega(2^k)$, admitting a reduction from the layered graph traversal problem.
In contrast, the easy $k$-taxi problem has exactly the same competitive ratio
as the $k$-server problem. We focus mainly on the hard version. For
hierarchically separated trees (HSTs), we present a memoryless randomized
algorithm with competitive ratio $2^k-1$ against adaptive online adversaries
and provide two matching lower bounds: for arbitrary algorithms against
adaptive adversaries and for memoryless algorithms against oblivious
adversaries. Due to well-known HST embedding techniques, the algorithm implies
a randomized $O(2^k\log n)$-competitive algorithm for arbitrary $n$-point
metrics. This is the first competitive algorithm for the hard $k$-taxi problem
for general finite metric spaces and general $k$. For the special case of
$k=2$, we obtain a precise answer of $9$ for the competitive ratio in general
metrics. With an algorithm based on growing, shrinking and shifting regions, we
show that one can achieve a constant competitive ratio also for the hard
$3$-taxi problem on the line (abstracting the scheduling of three elevators).
|
[{'version': 'v1', 'created': 'Tue, 17 Jul 2018 20:04:54 GMT'}
{'version': 'v2', 'created': 'Mon, 5 Nov 2018 21:05:38 GMT'}]
|
2018-11-07
|
[array(['Coester', 'Christian', ''], dtype=object)
array(['Koutsoupias', 'Elias', ''], dtype=object)]
|
17,812 |
gr-qc/0701164
|
Yosef Zlochower
|
Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, David Merritt
|
Large Merger Recoils and Spin Flips From Generic Black-Hole Binaries
|
4 pages. Accepted for publication in ApJL
|
Astrophys.J.659:L5-L8,2007
|
10.1086/516712
| null |
gr-qc astro-ph
| null |
We report the first results from evolutions of a generic black-hole binary,
i.e. a binary containing unequal mass black holes with misaligned spins. Our
configuration, which has a mass ratio of 2:1, consists of an initially
non-spinning hole orbiting a larger, rapidly spinning hole (specific spin a/m =
0.885), with the spin direction oriented -45 degrees with respect to the
orbital plane. We track the inspiral and merger for ~2 orbits and find that the
remnant receives a substantial kick of 454 km/s, more than twice as large as
the maximum kick from non-spinning binaries. The remnant spin direction is
flipped by 103 degrees with respect to the initial spin direction of the larger
hole. We performed a second run with anti-aligned spins, a/m = +-0.5 lying in
the orbital plane that produces a kick of 1830 km/s off the orbital plane. This
value scales to nearly 4000 km/s for maximally spinning holes. Such a large
recoil velocity opens the possibility that a merged binary can be ejected even
from the nucleus of a massive host galaxy.
|
[{'version': 'v1', 'created': 'Mon, 29 Jan 2007 20:50:10 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Feb 2007 16:35:11 GMT'}
{'version': 'v3', 'created': 'Fri, 2 Mar 2007 15:14:55 GMT'}]
|
2009-11-13
|
[array(['Campanelli', 'Manuela', ''], dtype=object)
array(['Lousto', 'Carlos O.', ''], dtype=object)
array(['Zlochower', 'Yosef', ''], dtype=object)
array(['Merritt', 'David', ''], dtype=object)]
|
17,813 |
astro-ph/0201475
|
Coel Hellier
|
Coel Hellier (Keele University)
|
Stream-fed Accretion in Intermediate Polars
|
10 pages, 6 figures, To appear in 'The Physics of Cataclysmic
Variables and Related Objects', Goettingen, August 5-10, 2001; includes
low-res figures to reduce size
| null | null | null |
astro-ph
| null |
I review the observational evidence for stream-fed accretion in intermediate
polars. Recent work on the discless system V2400 Oph confirms the pole-flipping
model of stream-fed accretion, but this applies only to a minority of the flow.
The bulk of the flow is in the form of blobs circling the white dwarf, a state
which might have been a precursor to disc formation in other IPs. I also
discuss work on the systems with anomalously long spin periods, V1025 Cen and
EX Hya. There are arguments both for and against stream-fed accretion in V1025
Cen, and further work is necessary before reaching a conclusion about this
system.
|
[{'version': 'v1', 'created': 'Tue, 29 Jan 2002 17:20:09 GMT'}]
|
2007-05-23
|
[array(['Hellier', 'Coel', '', 'Keele University'], dtype=object)]
|
17,814 |
2004.00802
|
Christopher H. Bennett
|
Christopher H. Bennett, T. Patrick Xiao, Ryan Dellana, Vineet Agrawal,
Ben Feinberg, Venkatraman Prabhakar, Krishnaswamy Ramkumar, Long Hinh,
Swatilekha Saha, Vijay Raghavan, Ramesh Chettuvetty, Sapan Agarwal, and
Matthew J. Marinella
|
Device-aware inference operations in SONOS nonvolatile memory arrays
|
To be presented at IEEE International Physics Reliability Symposium
(IRPS) 2020
| null | null | null |
cs.NE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Non-volatile memory arrays can deploy pre-trained neural network models for
edge inference. However, these systems are affected by device-level noise and
retention issues. Here, we examine damage caused by these effects, introduce a
mitigation strategy, and demonstrate its use in fabricated array of SONOS
(Silicon-Oxide-Nitride-Oxide-Silicon) devices. On MNIST, fashion-MNIST, and
CIFAR-10 tasks, our approach increases resilience to synaptic noise and drift.
We also show strong performance can be realized with ADCs of 5-8 bits
precision.
|
[{'version': 'v1', 'created': 'Thu, 2 Apr 2020 04:04:37 GMT'}]
|
2020-04-03
|
[array(['Bennett', 'Christopher H.', ''], dtype=object)
array(['Xiao', 'T. Patrick', ''], dtype=object)
array(['Dellana', 'Ryan', ''], dtype=object)
array(['Agrawal', 'Vineet', ''], dtype=object)
array(['Feinberg', 'Ben', ''], dtype=object)
array(['Prabhakar', 'Venkatraman', ''], dtype=object)
array(['Ramkumar', 'Krishnaswamy', ''], dtype=object)
array(['Hinh', 'Long', ''], dtype=object)
array(['Saha', 'Swatilekha', ''], dtype=object)
array(['Raghavan', 'Vijay', ''], dtype=object)
array(['Chettuvetty', 'Ramesh', ''], dtype=object)
array(['Agarwal', 'Sapan', ''], dtype=object)
array(['Marinella', 'Matthew J.', ''], dtype=object)]
|
17,815 |
1905.07323
|
Christian Winkler
|
Christian Winkler, Andreas Jeindl, Florian Mayer, Oliver T. Hofmann,
Ralf Tonner, and Egbert Zojer
|
Understanding the correlation between electronic coupling and energetic
stability of molecular crystal polymorphs: The instructive case of
quinacridone
|
This article has been removed by arXiv administrators because the
submitter did not have the rights to agree to the license at the time of
submission
|
Chem. Mater. 2019, 31, 17, 7054-7069
|
10.1021/acs.chemmater.9b01807
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A crucial factor determining charge transport in organic semiconductors is
the electronic coupling between the molecular constituents, which is heavily
influenced by the relative arrangement of the molecules. This renders
quinacridone, with its multiple, structurally fundamentally different
polymorphs and their diverse intermolecular interactions an ideal test case for
analyzing the correlation between the electronic coupling in a specific
configuration and the configuration's energetic stability. To provide an
in-depth analysis of this correlation, starting from the $\alpha$-polymorph of
quinacridone, we also construct a coplanar model crystal. This allows us to
systematically compare the displacement-dependence of the electronic coupling
with that of the total energy. In this way, we identify the combination of
Pauli repulsion and orbital rehybridization as the driving force steering the
system towards a structure in which the electronic coupling is minimal
(especially for the valence band and at small displacements). The general
nature of these observations is supported by equivalent trends for an analogous
pentacene model system. This underlines that the design of high-performance
materials cannot rely on the "natural" assembly of the $\pi$-conjugated
backbones of organic semiconductors into their most stable configurations.
Rather, it must include the incorporation of functional groups that steer
crystal packing towards more favorable structures, where aiming for short-axis
displacements or realizing comparably large long-axis displacements appear as
strategies worthwhile exploring.
|
[{'version': 'v1', 'created': 'Fri, 17 May 2019 15:22:26 GMT'}
{'version': 'v2', 'created': 'Mon, 5 Aug 2019 09:57:56 GMT'}]
|
2019-10-16
|
[array(['Winkler', 'Christian', ''], dtype=object)
array(['Jeindl', 'Andreas', ''], dtype=object)
array(['Mayer', 'Florian', ''], dtype=object)
array(['Hofmann', 'Oliver T.', ''], dtype=object)
array(['Tonner', 'Ralf', ''], dtype=object)
array(['Zojer', 'Egbert', ''], dtype=object)]
|
17,816 |
2305.16098
|
Felipe Ramirez
|
Demi Allen and Felipe A. Ramirez
|
Inhomogeneous approximation for systems of linear forms with primitivity
constraints
|
25 pages
| null | null | null |
math.NT
|
http://creativecommons.org/licenses/by/4.0/
|
We study (inhomogeneous) approximation for systems of linear forms using
integer points which satisfy additional primitivity constraints. The first
family of primitivity constraints we consider were introduced in 2015 by Dani,
Laurent, and Nogueira, and are associated to partitions of the coordinate
directions. Our results in this setting strengthen a theorem of Dani, Laurent,
and Nogueira, and address problems posed by those same authors. The second
primitivity constraints we consider are analogues of the coprimality required
in the higher-dimensional Duffin--Schaeffer conjecture, posed by Sprind\v{z}uk
in the 1970's and proved by Pollington and Vaughan in 1990. Here, with
attention restricted to systems of linear forms in at least three variables, we
prove a univariate inhomogeneous version of the Duffin--Schaeffer conjecture
for systems of linear forms, the multivariate homogeneous version of which was
stated by Beresnevich, Bernik, Dodson, and Velani in 2009 and recently proved
by the second author.
|
[{'version': 'v1', 'created': 'Thu, 25 May 2023 14:29:44 GMT'}]
|
2023-05-26
|
[array(['Allen', 'Demi', ''], dtype=object)
array(['Ramirez', 'Felipe A.', ''], dtype=object)]
|
17,817 |
0905.4737
|
Petr Plechac
|
Petr Plechac and Mathias Rousset
|
Implicit Mass-Matrix Penalization of Hamiltonian dynamics with
application to exact sampling of stiff systems
|
39 pages
| null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An implicit mass-matrix penalization (IMMP) of Hamiltonian dynamics is
proposed, and associated dynamical integrators, as well as sampling Monte-Carlo
schemes, are analyzed for systems with multiple time scales. The penalization
is based on an extended Hamiltonian with artificial constraints associated with
some selected DOFs. The penalty parameters enable arbitrary tuning of
timescales for the selected DOFs. The IMMP dynamics is shown to be an
interpolation between the exact Hamiltonian dynamics and the dynamics with
rigid constraints. This property translates in the associated numerical
integrator into a tunable trade-off between stability and dynamical
modification. Moreover, a penalty that vanishes with the time-step yields order
two convergent schemes for the exact dynamics. Moreover, by construction, the
resulting dynamics preserves the canonical equilibrium distribution in position
variables, up to a computable geometric correcting potential, leading to
Metropolis-like unbiased sampling algorithms. The algorithms can be implemented
with a simple modification of standard geometric integrators with algebraic
constraints imposed on the selected DOFs, and has no additional complexity in
terms of enforcing the constraints and force evaluations. The properties of the
IMMP method are demonstrated numerically on the $N$-alkane model, showing that
the time-step stability region of integrators and the sampling efficiency can
be increased with a gain that grows with the size of the system. This feature
is mathematically analyzed for a harmonic atomic chain model. When a large
stiffness parameter is introduced, the IMMP method is shown to be
asymptotically stable and to converge towards the heuristically expected
Markovian effective dynamics on the slow manifold.
|
[{'version': 'v1', 'created': 'Thu, 28 May 2009 20:21:16 GMT'}]
|
2009-06-01
|
[array(['Plechac', 'Petr', ''], dtype=object)
array(['Rousset', 'Mathias', ''], dtype=object)]
|
17,818 |
2110.12808
|
Vlad Smolin
|
Vlad Smolin
|
A Hausdorff compact space is metrizable if and only if it is a
continuous open image of the Sorgenfrey line
| null | null | null | null |
math.GN
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this note we prove that a regular continuous open image of the Sorgenfrey
line with an uncountable weight has a closed subspace that is homeomorphic to
the Sorgenfrey line. As a corollary we deduce the theorem in the title.
|
[{'version': 'v1', 'created': 'Mon, 25 Oct 2021 11:10:04 GMT'}]
|
2021-10-26
|
[array(['Smolin', 'Vlad', ''], dtype=object)]
|
17,819 |
1310.2816
|
Jun Zhu
|
Jun Zhu, Ning Chen, Hugh Perkins, Bo Zhang
|
Gibbs Max-margin Topic Models with Data Augmentation
|
35 pages
| null | null | null |
stat.ML cs.LG stat.CO stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Max-margin learning is a powerful approach to building classifiers and
structured output predictors. Recent work on max-margin supervised topic models
has successfully integrated it with Bayesian topic models to discover
discriminative latent semantic structures and make accurate predictions for
unseen testing data. However, the resulting learning problems are usually hard
to solve because of the non-smoothness of the margin loss. Existing approaches
to building max-margin supervised topic models rely on an iterative procedure
to solve multiple latent SVM subproblems with additional mean-field assumptions
on the desired posterior distributions. This paper presents an alternative
approach by defining a new max-margin loss. Namely, we present Gibbs max-margin
supervised topic models, a latent variable Gibbs classifier to discover hidden
topic representations for various tasks, including classification, regression
and multi-task learning. Gibbs max-margin supervised topic models minimize an
expected margin loss, which is an upper bound of the existing margin loss
derived from an expected prediction rule. By introducing augmented variables
and integrating out the Dirichlet variables analytically by conjugacy, we
develop simple Gibbs sampling algorithms with no restricting assumptions and no
need to solve SVM subproblems. Furthermore, each step of the
"augment-and-collapse" Gibbs sampling algorithms has an analytical conditional
distribution, from which samples can be easily drawn. Experimental results
demonstrate significant improvements on time efficiency. The classification
performance is also significantly improved over competitors on binary,
multi-class and multi-label classification tasks.
|
[{'version': 'v1', 'created': 'Thu, 10 Oct 2013 13:47:40 GMT'}]
|
2013-10-11
|
[array(['Zhu', 'Jun', ''], dtype=object)
array(['Chen', 'Ning', ''], dtype=object)
array(['Perkins', 'Hugh', ''], dtype=object)
array(['Zhang', 'Bo', ''], dtype=object)]
|
17,820 |
1108.4066
|
Muzaffer Ate\c{s} Mr.
|
Muzaffer Ates
|
On The Existence of Periodic Solutions for a Certain System of Third
Order Nonlinear Differential Equations
|
10 pages
| null | null | null |
math.CA
|
http://creativecommons.org/licenses/by/3.0/
|
In this paper, we study the existence and uniqueness of periodic solutions of
the differential equation of the form
. Here, we obtain some sufficient conditions which guarantee the existence of
periodic solutions. This equation is a quite general third- order nonlinear
vector differential equation, and one example is given for illustration of the
subject.
|
[{'version': 'v1', 'created': 'Fri, 19 Aug 2011 22:27:01 GMT'}]
|
2011-08-23
|
[array(['Ates', 'Muzaffer', ''], dtype=object)]
|
17,821 |
0811.3723
|
Mingyu Xiao
|
Mingyu Xiao, Leizhen Cai and Andrew C. Yao
|
Tight Approximation Ratio of a General Greedy Splitting Algorithm for
the Minimum k-Way Cut Problem
|
12 pages
| null | null | null |
cs.DS cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For an edge-weighted connected undirected graph, the minimum $k$-way cut
problem is to find a subset of edges of minimum total weight whose removal
separates the graph into $k$ connected components. The problem is NP-hard when
$k$ is part of the input and W[1]-hard when $k$ is taken as a parameter.
A simple algorithm for approximating a minimum $k$-way cut is to iteratively
increase the number of components of the graph by $h-1$, where $2 \le h \le k$,
until the graph has $k$ components. The approximation ratio of this algorithm
is known for $h \le 3$ but is open for $h \ge 4$.
In this paper, we consider a general algorithm that iteratively increases the
number of components of the graph by $h_i-1$, where $h_1 \le h_2 \le ... \le
h_q$ and $\sum_{i=1}^q (h_i-1) = k-1$. We prove that the approximation ratio of
this general algorithm is $2 - (\sum_{i=1}^q {h_i \choose 2})/{k \choose 2}$,
which is tight. Our result implies that the approximation ratio of the simple
algorithm is $2-h/k + O(h^2/k^2)$ in general and $2-h/k$ if $k-1$ is a multiple
of $h-1$.
|
[{'version': 'v1', 'created': 'Sun, 23 Nov 2008 03:47:50 GMT'}]
|
2008-11-25
|
[array(['Xiao', 'Mingyu', ''], dtype=object)
array(['Cai', 'Leizhen', ''], dtype=object)
array(['Yao', 'Andrew C.', ''], dtype=object)]
|
17,822 |
0806.3726
|
Tam\'as V\'ertesi
|
R. Englman, T. V\'ertesi
|
Large Berry phases in layered graphene
|
8 pages, 4 figures; slight addition and reference correction
|
Phys. Rev. B 78, 205311 (2008)
|
10.1103/PhysRevB.78.205311
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Brillouin zones of graphene systems possess Dirac points, where band
degeneracies occur. We study the variety of (and large magnitude) phases that
the electronic states can acquire when a uniform time-dependent electric field
carries the electrons around one or more Dirac points in a non-concentric
fashion. An experimentally accessible determination of excess Berry phases is
proposed involving the Zitterbewegung of electronic current near an
orthogonality point in adiabatic motion.
|
[{'version': 'v1', 'created': 'Mon, 23 Jun 2008 17:07:52 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Nov 2008 20:45:07 GMT'}]
|
2009-11-13
|
[array(['Englman', 'R.', ''], dtype=object)
array(['Vértesi', 'T.', ''], dtype=object)]
|
17,823 |
astro-ph/0504402
|
Cedric Ledoux
|
C. Ledoux (ESO), P. Petitjean (IAP), P. Moller (ESO), J. Fynbo
(Copenhagen), R. Srianand (IUCAA)
|
The mass-metallicity relation for high-redshift damped Ly-alpha galaxies
|
proceedings of IAU Colloquium No. 199, 2005, ``Probing Galaxies
through Quasar Absorption Lines'', P.R. Williams, C. Shu, B. Menard, eds
| null |
10.1017/S1743921305002991
| null |
astro-ph
| null |
We used our database of ESO VLT-UVES spectra of quasars to build up a sample
of 67 Damped Lyman-alpha (DLA) systems with redshifts 1.7<zabs<3.7. For each
system, we measured average metallicities relative to Solar, [X/H] (with either
X=Zn, S or Si), and the velocity widths of low-ionization line profiles, W1. We
find that there is a tight correlation between the two quantities, detected at
the 5sigma significance level. The existence of such a correlation, over more
than two orders of magnitude spread in metallicity, is likely to be the
consequence of an underlying mass-metallicity relation for the galaxies
responsible for DLA absorption lines. The best-fit linear relation is
[X/H]=1.35(\pm 0.11)\log W1 -3.69(\pm 0.18)$ with W1 expressed in km/s. While
the slope of this velocity-metallicity relation is the same within
uncertainties between the higher and the lower redshift bins of our sample,
there is a hint of an increase of the intercept point of the relation with
decreasing redshift. This suggests that galaxy halos of a given mass tend to
become more metal-rich with time. Moreover, the slope of this relation is
consistent with that of the luminosity-metallicity relation for local galaxies.
The DLA systems having the lowest metallicities among the DLA population would
therefore, on average, correspond to the galaxies having the lowest masses. In
turn, these galaxies should have the lowest luminosities among the DLA galaxy
population. This may explain the recent result that the few DLA systems with
detected Ly-alpha emission have higher than average metallicities.
|
[{'version': 'v1', 'created': 'Mon, 18 Apr 2005 22:47:04 GMT'}]
|
2009-11-11
|
[array(['Ledoux', 'C.', '', 'ESO'], dtype=object)
array(['Petitjean', 'P.', '', 'IAP'], dtype=object)
array(['Moller', 'P.', '', 'ESO'], dtype=object)
array(['Fynbo', 'J.', '', 'Copenhagen'], dtype=object)
array(['Srianand', 'R.', '', 'IUCAA'], dtype=object)]
|
17,824 |
1104.1485
|
Arijit Laha Ph.D.
|
Arijit Laha and J. Das
|
Fuzzy Rules and Evidence Theory for Satellite Image Analysis
|
5 pages, International Conference on Advances in Pattern Recognition
2003 (ICAPR03)
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Design of a fuzzy rule based classifier is proposed. The performance of the
classifier for multispectral satellite image classification is improved using
Dempster- Shafer theory of evidence that exploits information of the
neighboring pixels. The classifiers are tested rigorously with two known images
and their performance are found to be better than the results available in the
literature. We also demonstrate the improvement of performance while using D-S
theory along with fuzzy rule based classifiers over the basic fuzzy rule based
classifiers for all the test cases.
|
[{'version': 'v1', 'created': 'Fri, 8 Apr 2011 05:18:15 GMT'}]
|
2011-04-11
|
[array(['Laha', 'Arijit', ''], dtype=object)
array(['Das', 'J.', ''], dtype=object)]
|
17,825 |
hep-ph/0006097
|
Thomas G. Rizzo
|
H. Davoudiasl, J.L. Hewett, and T.G. Rizzo
|
The g-2 of the Muon in Localized Gravity Models
|
16 pages, 2 figs, LaTex, Additional discussion added
|
Phys.Lett.B493:135-141,2000
|
10.1016/S0370-2693(00)01132-1
|
SLAC-PUB-8469
|
hep-ph
| null |
The (g-2) of the muon is well known to be an important model building
constraint on theories beyond the Standard Model. In this paper, we examine the
contributions to $(g-2)_\mu$ arising in the Randall-Sundrum model of localized
gravity for the case where the Standard Model gauge fields and fermions are
both in the bulk. Using the current experimental world average measurement for
$(g-2)_\mu$, we find that strong constraints can be placed on the mass of the
lightest gauge Kaluza-Klein excitation for a narrow part of the allowed range
of the assumed universal 5-dimensional fermion mass parameter, $\nu$. However,
employing both perturbativity and fine-tuning constraints we find that we can
further restrict the allowed range of the parameter $\nu$ to only one fourth of
its previous size. The scenario with the SM in the RS bulk is thus tightly
constrained, being viable for only a small region of the parameter space.
|
[{'version': 'v1', 'created': 'Sat, 10 Jun 2000 03:04:32 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Jun 2000 14:58:35 GMT'}
{'version': 'v3', 'created': 'Sat, 5 Aug 2000 00:52:10 GMT'}
{'version': 'v4', 'created': 'Tue, 19 Sep 2000 18:53:54 GMT'}]
|
2008-11-26
|
[array(['Davoudiasl', 'H.', ''], dtype=object)
array(['Hewett', 'J. L.', ''], dtype=object)
array(['Rizzo', 'T. G.', ''], dtype=object)]
|
17,826 |
1404.6778
|
Suman Chowdhury
|
Suman Chowdhury, Banasree Sadhukhan, Dhani Nafday, Santu Baidya,
Debnarayan Jana, Tanusri Saha-Dasgupta and Abhijit Mookerjee
|
Configuration and Self-averaging in disordered systems
|
21 pages, 4 figures in Indian J Phys (2015)
| null |
10.1007/s12648-015-0789-2
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The main aim of this work is to present two different methodologies for
configuration averaging in disordered systems. The Recursion method is suitable
for the calculation of spatial or self-averaging, while the Augmented space
formalism averages over different possible configurations of the system. We
have applied these techniques to a simple example and compared their results.
Based on these, we have reexamined the concept of spatial ergodicity in
disordered systems. The specific aspect, we have focused on, is the question
"Why does an experimentalist often obtain the averaged result on a single
sample ?" We have found that in our example of disordered graphene, the two
lead to the same result within the error limits of the two methods.
|
[{'version': 'v1', 'created': 'Sun, 27 Apr 2014 16:05:21 GMT'}
{'version': 'v2', 'created': 'Thu, 24 Sep 2015 16:04:25 GMT'}]
|
2015-09-25
|
[array(['Chowdhury', 'Suman', ''], dtype=object)
array(['Sadhukhan', 'Banasree', ''], dtype=object)
array(['Nafday', 'Dhani', ''], dtype=object)
array(['Baidya', 'Santu', ''], dtype=object)
array(['Jana', 'Debnarayan', ''], dtype=object)
array(['Saha-Dasgupta', 'Tanusri', ''], dtype=object)
array(['Mookerjee', 'Abhijit', ''], dtype=object)]
|
17,827 |
1311.3572
|
Krzysztof Cichy
|
Krzysztof Cichy
|
Quark mass anomalous dimension and $\Lambda_{\overline{\textrm{MS}}}$
from the twisted mass Dirac operator spectrum
|
Changed title, includes new analysis concerning extraction of
$\Lambda_\MSbar$. 39 pages, 17 figures, version accepted in JHEP
|
JHEP 08 (2014) 127
|
10.1007/JHEP08(2014)127
|
DESY 13-212, SFB/CPP-13-91
|
hep-lat hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate whether it is possible to extract the quark mass anomalous
dimension and its scale dependence from the spectrum of the twisted mass Dirac
operator in Lattice QCD. The answer to this question appears to be positive,
provided that one goes to large enough eigenvalues, sufficiently above the
non-perturbative regime. The obtained results are compared to continuum
perturbation theory. By analyzing possible sources of systematic effects, we
find the domain of applicability of the approach, extending from an energy
scale of around 1.5 to 4 GeV. The lower limit is dictated by physics
(non-perturbative effects at low energies), while the upper bound is set by the
ultraviolet cut-off of present-day lattice simulations. The information about
the scale dependence of the anomalous dimension allows also to extract the
value of the $\Lambda_{\overline{\textrm{MS}}}$-parameter of 2-flavour QCD,
yielding the value $303(13)(25)$ MeV, where the first error is statistical and
the second one systematic. We use gauge field configuration ensembles generated
by the European Twisted Mass Collaboration (ETMC) with 2 flavours of dynamical
twisted mass quarks, at 4 lattice spacings in the range between around 0.04 and
0.08 fm.
|
[{'version': 'v1', 'created': 'Thu, 14 Nov 2013 16:41:30 GMT'}
{'version': 'v2', 'created': 'Tue, 29 Jul 2014 09:45:51 GMT'}]
|
2014-10-08
|
[array(['Cichy', 'Krzysztof', ''], dtype=object)]
|
17,828 |
astro-ph/0104285
|
Jean in 't Zand
|
J.J.M. in 't Zand, R. Cornelisse, E. Kuulkers, J. Heise, L. Kuiper, A.
Bazzano, M. Cocchi, J.M. Muller, L. Natalucci, M.J.S. Smith, P. Ubertini
|
The first outburst of SAX J1808.4-3658 revisited
|
Accepted for publication in Astronomy & Astrophysics
| null |
10.1051/0004-6361:20010546
| null |
astro-ph
| null |
Data of the 1996 outburst of the single-known accreting millisecond pulsar
SAX J1808.4-3658, taken with the Wide Field Cameras (WFCs) on BeppoSAX, are
revisited with more complete data coverage and more comprehensive analysis
techniques than in a previous report. An additional type-I X-ray burst was
identified which occurred at a time when the persistent emission is below the
detection limit, roughly 30 days after outburst maximum. This burst is three
times longer than the first two bursts, and 50% brighter. It is the brightest
burst within the ~1700 type-I bursts detected so far with the WFCs. A spectral
analysis of the data reveals a distance to SAX J1808.4-3658 of ~2.5 kpc. This
is an update from a previously reported value of 4 kpc. We present the evidence
that we have for the presence of oscillations at the pulsar frequency during
part of the newly found burst. Such an oscillation would lend support to the
idea that the frequency of millisecond burst oscillations in other objects is
very close to the neutron star rotation frequency.
|
[{'version': 'v1', 'created': 'Tue, 17 Apr 2001 13:51:59 GMT'}]
|
2009-11-06
|
[array(['Zand', "J. J. M. in 't", ''], dtype=object)
array(['Cornelisse', 'R.', ''], dtype=object)
array(['Kuulkers', 'E.', ''], dtype=object)
array(['Heise', 'J.', ''], dtype=object)
array(['Kuiper', 'L.', ''], dtype=object)
array(['Bazzano', 'A.', ''], dtype=object)
array(['Cocchi', 'M.', ''], dtype=object)
array(['Muller', 'J. M.', ''], dtype=object)
array(['Natalucci', 'L.', ''], dtype=object)
array(['Smith', 'M. J. S.', ''], dtype=object)
array(['Ubertini', 'P.', ''], dtype=object)]
|
17,829 |
2004.03227
|
Jind\v{r}ich Helcl
|
Zden\v{e}k Kasner, Jind\v{r}ich Libovick\'y, Jind\v{r}ich Helcl
|
Improving Fluency of Non-Autoregressive Machine Translation
| null | null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Non-autoregressive (nAR) models for machine translation (MT) manifest
superior decoding speed when compared to autoregressive (AR) models, at the
expense of impaired fluency of their outputs. We improve the fluency of a nAR
model with connectionist temporal classification (CTC) by employing additional
features in the scoring model used during beam search decoding. Since the beam
search decoding in our model only requires to run the network in a single
forward pass, the decoding speed is still notably higher than in standard AR
models. We train models for three language pairs: German, Czech, and Romanian
from and into English. The results show that our proposed models can be more
efficient in terms of decoding speed and still achieve a competitive BLEU score
relative to AR models.
|
[{'version': 'v1', 'created': 'Tue, 7 Apr 2020 09:40:54 GMT'}]
|
2020-04-08
|
[array(['Kasner', 'Zdeněk', ''], dtype=object)
array(['Libovický', 'Jindřich', ''], dtype=object)
array(['Helcl', 'Jindřich', ''], dtype=object)]
|
17,830 |
cond-mat/0411391
|
Xuan Gao
|
Xuan P.A. Gao, G.S. Boebinger, A.P. Mills Jr., A.P. Ramirez, L.N.
Pfeiffer, K.W. West
|
Temperature and Magnetic Field Enhanced Hall Slope of a Dilute 2D Hole
System in the Ballistic Regime
|
Accepted for publication in Physical Review Letters
|
Phys. Rev. Lett. 93, 256402 (2004)
|
10.1103/PhysRevLett.93.256402
|
LANL LA-UR-04-3199
|
cond-mat.str-el cond-mat.mes-hall
| null |
We report the temperature($T$) and perpendicular magnetic field($B$)
dependence of the Hall resistivity $\rho_{xy}(B)$ of dilute metallic
two-dimensional(2D) holes in GaAs over a broad range of
temperature(0.02-1.25K). The low $B$ Hall coefficient, $R_H$, is found to be
enhanced when $T$ decreases. Strong magnetic fields further enhance the slope
of $\rho_{xy}(B)$ at all temperatures studied. Coulomb interaction corrections
of a Fermi liquid(FL) in the ballistic regime can not explain the enhancement
of $\rho_{xy}$ which occurs in the same regime as the anomalous metallic
longitudinal conductivity. In particular, although the metallic conductivity in
2D systems has been attributed to electron interactions in a FL, these same
interactions should reduce, {\it not enhance} the slope of $\rho_{xy}(B)$ as
$T$ decreases and/or $B$ increases.
|
[{'version': 'v1', 'created': 'Mon, 15 Nov 2004 22:52:18 GMT'}]
|
2007-05-23
|
[array(['Gao', 'Xuan P. A.', ''], dtype=object)
array(['Boebinger', 'G. S.', ''], dtype=object)
array(['Mills', 'A. P.', 'Jr.'], dtype=object)
array(['Ramirez', 'A. P.', ''], dtype=object)
array(['Pfeiffer', 'L. N.', ''], dtype=object)
array(['West', 'K. W.', ''], dtype=object)]
|
17,831 |
1711.09941
|
Mingyi Zhang
|
Goffredo Chirco, Daniele Oriti, Mingyi Zhang
|
Ryu-Takayanagi Formula for Symmetric Random Tensor Networks
|
10 pages, 4 figures
|
Phys. Rev. D 97, 126002 (2018)
|
10.1103/PhysRevD.97.126002
| null |
hep-th gr-qc math-ph math.MP quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the special case of Random Tensor Networks (RTN) endowed with
gauge symmetry constraints on each tensor. We compute the R\`enyi entropy for
such states and recover the Ryu-Takayanagi (RT) formula in the large bond
regime. The result provides first of all an interesting new extension of the
existing derivations of the RT formula for RTNs. Moreover, this extension of
the RTN formalism brings it in direct relation with (tensorial) group field
theories (and spin networks), and thus provides new tools for realizing the
tensor network/geometry duality in the context of background independent
quantum gravity, and for importing quantum gravity tools in tensor network
research.
|
[{'version': 'v1', 'created': 'Mon, 27 Nov 2017 19:27:16 GMT'}]
|
2018-06-13
|
[array(['Chirco', 'Goffredo', ''], dtype=object)
array(['Oriti', 'Daniele', ''], dtype=object)
array(['Zhang', 'Mingyi', ''], dtype=object)]
|
17,832 |
1804.07056
|
Alan Lukezic
|
Alan Luke\v{z}i\v{c}, Luka \v{C}ehovin Zajc, Tom\'a\v{s} Voj\'i\v{r},
Ji\v{r}\'i Matas, Matej Kristan
|
Now you see me: evaluating performance in long-term visual tracking
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a new long-term tracking performance evaluation methodology and
present a new challenging dataset of carefully selected sequences with many
target disappearances. We perform an extensive evaluation of six long-term and
nine short-term state-of-the-art trackers, using new performance measures,
suitable for evaluating long-term tracking - tracking precision, recall and
F-score. The evaluation shows that a good model update strategy and the
capability of image-wide re-detection are critical for long-term tracking
performance. We integrated the methodology in the VOT toolkit to automate
experimental analysis and benchmarking and to facilitate the development of
long-term trackers.
|
[{'version': 'v1', 'created': 'Thu, 19 Apr 2018 09:41:58 GMT'}]
|
2018-04-20
|
[array(['Lukežič', 'Alan', ''], dtype=object)
array(['Zajc', 'Luka Čehovin', ''], dtype=object)
array(['Vojíř', 'Tomáš', ''], dtype=object)
array(['Matas', 'Jiří', ''], dtype=object)
array(['Kristan', 'Matej', ''], dtype=object)]
|
17,833 |
2007.07284
|
Richard Cartwright
|
Richard J. Cartwright, Chloe B. Beddingfield, Tom Nordheim, Catherine
Elder, Will Grundy, Ali Bramson, Michael Sori, Robert Pappalardo, Marc Neveu,
Devon Burr, Anton Ermakov, Joe Roser, Julie Castillo-Rogez, Mark Showalter,
Ian Cohen, Zibi Turtle, Mark Hofstadter
|
The Science Case for Spacecraft Exploration of the Uranian Satellites
| null | null | null | null |
astro-ph.IM astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The five classical Uranian moons are possible ocean worlds that exhibit
bizarre geologic landforms, hinting at recent surface-interior communication.
However, Uranus' classical moons, as well as its ring moons and irregular
satellites, remain poorly understood. We assert that a Flagship-class orbiter
is needed to explore the Uranian satellites.
|
[{'version': 'v1', 'created': 'Tue, 14 Jul 2020 18:20:59 GMT'}]
|
2020-07-16
|
[array(['Cartwright', 'Richard J.', ''], dtype=object)
array(['Beddingfield', 'Chloe B.', ''], dtype=object)
array(['Nordheim', 'Tom', ''], dtype=object)
array(['Elder', 'Catherine', ''], dtype=object)
array(['Grundy', 'Will', ''], dtype=object)
array(['Bramson', 'Ali', ''], dtype=object)
array(['Sori', 'Michael', ''], dtype=object)
array(['Pappalardo', 'Robert', ''], dtype=object)
array(['Neveu', 'Marc', ''], dtype=object)
array(['Burr', 'Devon', ''], dtype=object)
array(['Ermakov', 'Anton', ''], dtype=object)
array(['Roser', 'Joe', ''], dtype=object)
array(['Castillo-Rogez', 'Julie', ''], dtype=object)
array(['Showalter', 'Mark', ''], dtype=object)
array(['Cohen', 'Ian', ''], dtype=object)
array(['Turtle', 'Zibi', ''], dtype=object)
array(['Hofstadter', 'Mark', ''], dtype=object)]
|
17,834 |
2209.13514
|
Hang Zhou
|
Zhiliang Xu, Hang Zhou, Zhibin Hong, Ziwei Liu, Jiaming Liu, Zhizhi
Guo, Junyu Han, Jingtuo Liu, Errui Ding, Jingdong Wang
|
StyleSwap: Style-Based Generator Empowers Robust Face Swapping
|
Accepted to ECCV 2022. Demo videos and code can be found at
https://hangz-nju-cuhk.github.io/projects/StyleSwap
| null | null | null |
cs.CV cs.GR
|
http://creativecommons.org/licenses/by/4.0/
|
Numerous attempts have been made to the task of person-agnostic face swapping
given its wide applications. While existing methods mostly rely on tedious
network and loss designs, they still struggle in the information balancing
between the source and target faces, and tend to produce visible artifacts. In
this work, we introduce a concise and effective framework named StyleSwap. Our
core idea is to leverage a style-based generator to empower high-fidelity and
robust face swapping, thus the generator's advantage can be adopted for
optimizing identity similarity. We identify that with only minimal
modifications, a StyleGAN2 architecture can successfully handle the desired
information from both source and target. Additionally, inspired by the ToRGB
layers, a Swapping-Driven Mask Branch is further devised to improve information
blending. Furthermore, the advantage of StyleGAN inversion can be adopted.
Particularly, a Swapping-Guided ID Inversion strategy is proposed to optimize
identity similarity. Extensive experiments validate that our framework
generates high-quality face swapping results that outperform state-of-the-art
methods both qualitatively and quantitatively.
|
[{'version': 'v1', 'created': 'Tue, 27 Sep 2022 16:35:16 GMT'}]
|
2022-09-28
|
[array(['Xu', 'Zhiliang', ''], dtype=object)
array(['Zhou', 'Hang', ''], dtype=object)
array(['Hong', 'Zhibin', ''], dtype=object)
array(['Liu', 'Ziwei', ''], dtype=object)
array(['Liu', 'Jiaming', ''], dtype=object)
array(['Guo', 'Zhizhi', ''], dtype=object)
array(['Han', 'Junyu', ''], dtype=object)
array(['Liu', 'Jingtuo', ''], dtype=object)
array(['Ding', 'Errui', ''], dtype=object)
array(['Wang', 'Jingdong', ''], dtype=object)]
|
17,835 |
2205.01678
|
Tian-Yu Ye
|
Tian-Yu Ye, Li-Zhen Jiang
|
Large payload quantum steganography based on cavity quantum
electrodynamics
|
7 pages, 1 table. arXiv admin note: text overlap with
arXiv:2205.01251
|
Chinese Physics B,2013,22(4):040305
|
10.1088/1674-1056/22/4/040305
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A large payload quantum steganography protocol based on cavity quantum
electrodynamics (QED) is presented in the paper, which effectively uses the
evolution law of atom in cavity QED. The protocol builds up hidden channel to
transmit secret messages using entanglement swapping between one GHZ state and
one Bell state in cavity QED together with the Hadamard operation. The quantum
steganography protocol is insensitive to cavity decay and thermal field. The
capacity, imperceptibility and security against eavesdropping are analyzed in
detail in the protocol. It turns out that the protocol not only has good
imperceptibility but also possesses good security against eavesdropping. In
addition, its capacity of hidden channel achieves five bits, larger than most
of those previous quantum steganography protocols.
|
[{'version': 'v1', 'created': 'Tue, 3 May 2022 00:42:12 GMT'}
{'version': 'v2', 'created': 'Wed, 18 May 2022 10:58:14 GMT'}]
|
2022-05-19
|
[array(['Ye', 'Tian-Yu', ''], dtype=object)
array(['Jiang', 'Li-Zhen', ''], dtype=object)]
|
17,836 |
2104.13577
|
Masaru Hamano
|
Masaru Hamano, Masahiro Ikeda
|
Scattering solutions to nonlinear Schr\"odinger equation with a long
range potential
|
30 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we consider a nonlinear Schr\"odinger equation with a
repulsive inverse-power potential. It is known that the corresponding
stationary problem has a "radial" ground state. Here, the "radial" ground state
is a least energy solution among radial solutions to the stationary problem. We
prove that if radial initial data below the "radial" ground state has positive
virial functional, then the corresponding solution to the nonlinear
Schr\"odinger equation scatters. In particular, we can treat not only short
range potentials but also long range potentials.
|
[{'version': 'v1', 'created': 'Wed, 28 Apr 2021 05:49:09 GMT'}]
|
2021-04-29
|
[array(['Hamano', 'Masaru', ''], dtype=object)
array(['Ikeda', 'Masahiro', ''], dtype=object)]
|
17,837 |
2301.12545
|
Jonas Ritter
|
Jonas Ritter, Shucheta Shegufta, Michael Zaiser
|
Effects of disorder on deformation and failure of brittle porous
materials
|
15 pages, 7 figures
| null |
10.1088/1742-5468/acccdf
| null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
The mechanical behavior of porous materials depends strongly on porosity and
pore geometry, but also on morphological parameters characterizing the spatial
arrangement of pores. Here we use bond-based peridynamics to study effects of
disorder on the deformation and failure behavior of brittle porous solids both
in the quasi-static limit and in case of dynamic loading scenarios. We show
that structural disorder, which has a strong influence on stiffness, strength
and toughness in the quasi-static limit, becomes less relevant under dynamic
loading conditions.
|
[{'version': 'v1', 'created': 'Sun, 29 Jan 2023 21:26:14 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Mar 2023 15:19:04 GMT'}]
|
2023-05-17
|
[array(['Ritter', 'Jonas', ''], dtype=object)
array(['Shegufta', 'Shucheta', ''], dtype=object)
array(['Zaiser', 'Michael', ''], dtype=object)]
|
17,838 |
2210.17405
|
Chancellor Johnstone
|
Chancellor Johnstone, Eugene Ndiaye
|
Exact and Approximate Conformal Inference in Multiple Dimensions
|
18 pages with supplemental material, 10 figures
| null | null | null |
stat.ML cs.LG math.ST stat.CO stat.OT stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is common in machine learning to estimate a response y given covariate
information x. However, these predictions alone do not quantify any uncertainty
associated with said predictions. One way to overcome this deficiency is with
conformal inference methods, which construct a set containing the unobserved
response y with a prescribed probability. Unfortunately, even with
one-dimensional responses, conformal inference is computationally expensive
despite recent encouraging advances. In this paper, we explore the
multidimensional response case within a regression setting, delivering exact
derivations of conformal inference p-values when the predictive model can be
described as a linear function of y. Additionally, we propose different
efficient ways of approximating the conformal prediction region for non-linear
predictors while preserving computational advantages. We also provide empirical
justification for these approaches using a real-world data example.
|
[{'version': 'v1', 'created': 'Mon, 31 Oct 2022 15:41:13 GMT'}]
|
2022-11-01
|
[array(['Johnstone', 'Chancellor', ''], dtype=object)
array(['Ndiaye', 'Eugene', ''], dtype=object)]
|
17,839 |
2002.06345
|
Dongnan Liu
|
Dongnan Liu, Donghao Zhang, Yang Song, Heng Huang, Weidong Cai
|
Panoptic Feature Fusion Net: A Novel Instance Segmentation Paradigm for
Biomedical and Biological Images
|
Accepted to appear in IEEE Transactions on Image Processing
| null |
10.1109/TIP.2021.3050668
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Instance segmentation is an important task for biomedical and biological
image analysis. Due to the complicated background components, the high
variability of object appearances, numerous overlapping objects, and ambiguous
object boundaries, this task still remains challenging. Recently, deep learning
based methods have been widely employed to solve these problems and can be
categorized into proposal-free and proposal-based methods. However, both
proposal-free and proposal-based methods suffer from information loss, as they
focus on either global-level semantic or local-level instance features. To
tackle this issue, we present a Panoptic Feature Fusion Net (PFFNet) that
unifies the semantic and instance features in this work. Specifically, our
proposed PFFNet contains a residual attention feature fusion mechanism to
incorporate the instance prediction with the semantic features, in order to
facilitate the semantic contextual information learning in the instance branch.
Then, a mask quality sub-branch is designed to align the confidence score of
each object with the quality of the mask prediction. Furthermore, a consistency
regularization mechanism is designed between the semantic segmentation tasks in
the semantic and instance branches, for the robust learning of both tasks.
Extensive experiments demonstrate the effectiveness of our proposed PFFNet,
which outperforms several state-of-the-art methods on various biomedical and
biological datasets.
|
[{'version': 'v1', 'created': 'Sat, 15 Feb 2020 09:19:41 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Jan 2021 10:14:24 GMT'}]
|
2021-02-24
|
[array(['Liu', 'Dongnan', ''], dtype=object)
array(['Zhang', 'Donghao', ''], dtype=object)
array(['Song', 'Yang', ''], dtype=object)
array(['Huang', 'Heng', ''], dtype=object)
array(['Cai', 'Weidong', ''], dtype=object)]
|
17,840 |
cond-mat/0506605
|
Claudio Castellano
|
Claudio Castellano, Romualdo Pastor-Satorras
|
Non mean-field behavior of the contact process on scale-free networks
|
5 pages, 4 figures, published version
|
Phys. Rev. Lett. 96, 038701 (2006)
|
10.1103/PhysRevLett.96.038701
| null |
cond-mat.stat-mech
| null |
We present an analysis of the classical contact process on scale-free
networks. A mean-field study, both for finite and infinite network sizes,
yields an absorbing-state phase transition at a finite critical value of the
control parameter, characterized by a set of exponents depending on the network
structure. Since finite size effects are large and the infinite network limit
cannot be reached in practice, a numerical study of the transition requires the
application of finite size scaling theory. Contrary to other critical phenomena
studied previously, the contact process in scale-free networks exhibits a
non-trivial critical behavior that cannot be quantitatively accounted for by
mean-field theory.
|
[{'version': 'v1', 'created': 'Thu, 23 Jun 2005 14:26:53 GMT'}
{'version': 'v2', 'created': 'Mon, 30 Jan 2006 15:12:08 GMT'}]
|
2009-11-11
|
[array(['Castellano', 'Claudio', ''], dtype=object)
array(['Pastor-Satorras', 'Romualdo', ''], dtype=object)]
|
17,841 |
1004.0244
|
Joao Strapasson E
|
J. E. Strapasson, S. I. R. Costa, M. M. S. Alves
|
A note on quadrangular embedding of Abelian Cayley Graphs
| null | null | null | null |
math.GN
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The genus graphs have been studied by many authors, but just a few results
concerning in special cases: Planar, Toroidal, Complete, Bipartite and
Cartesian Product of Bipartite. We present here a derive general lower bound
for the genus of a abelian Cayley graph and construct a family of circulant
graphs which reach this bound.
|
[{'version': 'v1', 'created': 'Thu, 1 Apr 2010 21:57:30 GMT'}
{'version': 'v2', 'created': 'Mon, 4 Jan 2016 14:46:35 GMT'}]
|
2016-01-05
|
[array(['Strapasson', 'J. E.', ''], dtype=object)
array(['Costa', 'S. I. R.', ''], dtype=object)
array(['Alves', 'M. M. S.', ''], dtype=object)]
|
17,842 |
1903.09487
|
Michael Kewming
|
M. J. Kewming, S. Shrapnel, A. G. White, J. Romero
|
Hiding Ignorance Using High Dimensions
| null |
Phys. Rev. Lett. 124, 250401 (2020)
|
10.1103/PhysRevLett.124.250401
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The absence of information -- entirely or partly -- is called ignorance.
Naturally, one might ask if some ignorance of a whole system will imply some
ignorance of its parts. Our classical intuition tells us yes, however quantum
theory tells us no: it is possible to encode information in a quantum system so
that despite some ignorance of the whole, it is impossible to identify the
unknown part arXiv:1011.6448. Experimentally verifying this counter-intuitive
fact requires controlling and measuring quantum systems of high dimension $(d
{>} 9)$. We provide this experimental evidence using the transverse spatial
modes of light, a powerful resource for testing high dimensional quantum
phenomenon.
|
[{'version': 'v1', 'created': 'Fri, 22 Mar 2019 13:17:02 GMT'}
{'version': 'v2', 'created': 'Thu, 18 Apr 2019 03:18:19 GMT'}
{'version': 'v3', 'created': 'Mon, 1 Jul 2019 02:59:29 GMT'}
{'version': 'v4', 'created': 'Thu, 4 Jul 2019 21:59:10 GMT'}
{'version': 'v5', 'created': 'Wed, 4 Dec 2019 01:37:34 GMT'}]
|
2020-11-22
|
[array(['Kewming', 'M. J.', ''], dtype=object)
array(['Shrapnel', 'S.', ''], dtype=object)
array(['White', 'A. G.', ''], dtype=object)
array(['Romero', 'J.', ''], dtype=object)]
|
17,843 |
2203.10777
|
Martin Waltz
|
Martin Waltz and Abhay Kumar Singh and Ostap Okhrin
|
Vulnerability-CoVaR: Investigating the Crypto-market
| null | null | null | null |
q-fin.GN
|
http://creativecommons.org/licenses/by/4.0/
|
This paper proposes an important extension to Conditional Value-at-Risk
(CoVaR), the popular systemic risk measure, and investigates its properties on
the cryptocurrency market. The proposed Vulnerability-CoVaR (VCoVaR) is defined
as the Value-at-Risk (VaR) of a financial system or institution, given that at
least one other institution is equal or below its VaR. The VCoVaR relaxes
normality assumptions and is estimated via copula. While important theoretical
findings of the measure are detailed, the empirical study analyzes how
different distressing events of the cryptocurrencies impact the risk level of
each other. The results show that Litecoin displays the largest impact on
Bitcoin and that each cryptocurrency is significantly affected if an event of
joint distress among the remaining market participants occurs. The VCoVaR is
shown to capture domino effects better than other CoVaR extensions.
|
[{'version': 'v1', 'created': 'Mon, 21 Mar 2022 07:45:06 GMT'}]
|
2022-03-22
|
[array(['Waltz', 'Martin', ''], dtype=object)
array(['Singh', 'Abhay Kumar', ''], dtype=object)
array(['Okhrin', 'Ostap', ''], dtype=object)]
|
17,844 |
1411.2442
|
Grazia Luparello
|
Grazia Luparello (for the ALICE Collaboration)
|
Results on Heavy-Flavour Production in pp, p-Pb and Pb-Pb Collisions
with ALICE at the LHC
|
4 pages, 3 figures, Proceedings of PANIC 2014
| null | null | null |
nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The ALICE Collaboration has measured heavy-flavour production through the
reconstruction of hadronic decays of D mesons at mid-rapidity and via
semi-electronic (at mid-rapidity) and semi-muonic (at forward rapidity) decays
of charm and beauty hadrons in pp, p-Pb and Pb-Pb collisions. A summary of the
most recent results from p-Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV and Pb-Pb
collisions at $\sqrt{s_{NN}} = 2.76$ TeV is presented in this paper.
|
[{'version': 'v1', 'created': 'Mon, 10 Nov 2014 14:36:21 GMT'}]
|
2019-08-14
|
[array(['Luparello', 'Grazia', '', 'for the ALICE Collaboration'],
dtype=object) ]
|
17,845 |
2001.08859
|
Loic Cappanera
|
Girault Vivette, Riviere Beatrice and Cappanera Loic
|
Convergence of a finite element method for degenerate two-phase flow in
porous media
| null | null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A finite element method with mass-lumping and flux upwinding, is formulated
for solving the immiscible two-phase flow problem in porous media. The method
approximates directly the wetting phase pressure and saturation, which are the
primary unknowns. The discrete saturation satisfies a maximum principle.
Theoretical convergence is proved via a compactness argument. The proof is
convoluted because of the degeneracy of the phase mobilities and the
unboundedness of the capillary pressure.
|
[{'version': 'v1', 'created': 'Fri, 24 Jan 2020 01:44:30 GMT'}]
|
2020-01-27
|
[array(['Vivette', 'Girault', ''], dtype=object)
array(['Beatrice', 'Riviere', ''], dtype=object)
array(['Loic', 'Cappanera', ''], dtype=object)]
|
17,846 |
1410.6990
|
Dacheng Tao
|
Chang Xu, Tongliang Liu, Dacheng Tao, Chao Xu
|
Local Rademacher Complexity for Multi-label Learning
| null | null | null | null |
stat.ML cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze the local Rademacher complexity of empirical risk minimization
(ERM)-based multi-label learning algorithms, and in doing so propose a new
algorithm for multi-label learning. Rather than using the trace norm to
regularize the multi-label predictor, we instead minimize the tail sum of the
singular values of the predictor in multi-label learning. Benefiting from the
use of the local Rademacher complexity, our algorithm, therefore, has a sharper
generalization error bound and a faster convergence rate. Compared to methods
that minimize over all singular values, concentrating on the tail singular
values results in better recovery of the low-rank structure of the multi-label
predictor, which plays an import role in exploiting label correlations. We
propose a new conditional singular value thresholding algorithm to solve the
resulting objective function. Empirical studies on real-world datasets validate
our theoretical results and demonstrate the effectiveness of the proposed
algorithm.
|
[{'version': 'v1', 'created': 'Sun, 26 Oct 2014 05:52:33 GMT'}]
|
2014-10-28
|
[array(['Xu', 'Chang', ''], dtype=object)
array(['Liu', 'Tongliang', ''], dtype=object)
array(['Tao', 'Dacheng', ''], dtype=object)
array(['Xu', 'Chao', ''], dtype=object)]
|
17,847 |
1301.2747
|
Daodi Lu
|
Daodi Lu
|
A Study on the Amount of Random Graph Groupies
|
18 pages
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In 1980, Ajtai, Komlos and Szemer{\'e}di defined "groupie": Let $G=(V,E)$ be
a simple graph, $|V|=n$, $|E|=e$. For a vertex $v\in V$, let $r(v)$ denote the
sum of the degrees of the vertices adjacent to $v$. We say $v\in V$ is a {\it
groupie}, if $\frac{r(v)}{\deg(v)}\geq\frac{e}{n}.$ In this paper, we prove
that in random graph $B(n,p)$, $0<p<1$, the proportion of groupies converges in
probability towards $\Phi(1)\approx0.8413$ as $n$ approaches infinity, where
$\Phi(x)$ is the distribution function of standard normal distribution N(0,1).
We also discuss the asymptotic behavior of the proportion of groupies in
complete bipartite graph $B(n_1,n_2,p)$.
|
[{'version': 'v1', 'created': 'Sun, 13 Jan 2013 07:04:10 GMT'}]
|
2013-01-15
|
[array(['Lu', 'Daodi', ''], dtype=object)]
|
17,848 |
astro-ph/0701874
|
Enrico Ramirez-Ruiz
|
William H. Lee, Enrico Ramirez-Ruiz
|
The Progenitors of Short Gamma-Ray Bursts
|
76 pages, 26 figures, review article to appear in the GRB Focus Issue
of New Journal of Physics
|
New J.Phys.9:17,2007
|
10.1088/1367-2630/9/1/017
| null |
astro-ph
| null |
Recent months have witnessed dramatic progress in our understanding of SGRBs.
There is now general agreement that SGRBs can produce directed outflows of
relativistic matter with a kinetic luminosity exceeding by many millions that
of AGN. The requirements of energy and compactness indicate that SGRB activity
can be ascribed to a modest fraction of a solar mass of gas accreting onto a
stellar mass BH or to a precursor stage leading inevitably to such an object.
Scenarios involving the birth of a rapidly rotating NS, or an accreting BH in a
merging binary driven by gravitational waves are reviewed, along with possible
alternatives (collisions or collapse of compact objects). If a BH lies at the
center of this activity, the fundamental pathways through which mass, angular
momentum and energy can flow around and away from it play a key role in
understanding how these prime movers can form collimated relativistic outflows.
Hypercritical flows near BHs, where photons cannot supply the cooling, but
neutrinos do so efficiently, are discussed in detail, and we believe that they
offer the best hope of understanding the central engine. On the other hand,
statistical investigations of SGRB niches provide valuable information on their
nature and evolutionary behavior. In addition, compelling evidence now points
to the continuous fueling of SGRB sources. We suggest that the observed late
flaring activity could be due to a secondary accretion episode induced by the
fall back of material stripped from a compact object during a merger or
collision. Important open questions are identified, along with the types of
observation that would discriminate among various models. SGRB jets may be one
of the few observable consequences of how flows near nuclear density behave
under the influence of strong gravitational fields. (abridged)
|
[{'version': 'v1', 'created': 'Tue, 30 Jan 2007 20:11:34 GMT'}
{'version': 'v2', 'created': 'Wed, 31 Jan 2007 23:04:39 GMT'}
{'version': 'v3', 'created': 'Mon, 26 Mar 2007 18:46:02 GMT'}]
|
2011-07-19
|
[array(['Lee', 'William H.', ''], dtype=object)
array(['Ramirez-Ruiz', 'Enrico', ''], dtype=object)]
|
17,849 |
cond-mat/0202112
|
Michael Biehl
|
I. Kanter, W. Kinzel and E. Kanter
|
Secure exchange of information by synchronization of neural networks
|
11 pages, 5 figures
|
Europhys. Lett. 57, pp. 141-147 (2002
|
10.1209/epl/i2002-00552-9
| null |
cond-mat.stat-mech cond-mat.dis-nn
| null |
A connection between the theory of neural networks and cryptography is
presented. A new phenomenon, namely synchronization of neural networks is
leading to a new method of exchange of secret messages. Numerical simulations
show that two artificial networks being trained by Hebbian learning rule on
their mutual outputs develop an antiparallel state of their synaptic weights.
The synchronized weights are used to construct an ephemeral key exchange
protocol for a secure transmission of secret data. It is shown that an opponent
who knows the protocol and all details of any transmission of the data has no
chance to decrypt the secret message, since tracking the weights is a hard
problem compared to synchronization. The complexity of the generation of the
secure channel is linear with the size of the network.
|
[{'version': 'v1', 'created': 'Thu, 7 Feb 2002 11:29:45 GMT'}]
|
2009-11-07
|
[array(['Kanter', 'I.', ''], dtype=object)
array(['Kinzel', 'W.', ''], dtype=object)
array(['Kanter', 'E.', ''], dtype=object)]
|
17,850 |
1105.0336
|
Farid Rahoui
|
Farid Rahoui, Julia C. Lee, Sebastian Heinz, Dean C. Hines, Katja
Pottschmidt, J\"orn Wilms, and Victoria Grinberg
|
A multiwavelength study of Cygnus X-1: the first mid-infrared
spectroscopic detection of compact jets
|
46 pages, 10 figures, 8 tables. Accepted for publication in ApJ
| null |
10.1088/0004-637X/736/1/63
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on a Spitzer/IRS (mid-infrared), RXTE/PCA+HEXTE (X-ray), and Ryle
(radio) simultaneous multiwavelength study of the microquasar Cygnus X-1, which
aimed at an investigation of the origin of its mid-infrared emission. Compact
jets were present in two out of three observations, and we show that they
strongly contribute to the mid-infrared continuum. During the first
observation, we detect the spectral break - where the transition from the
optically thick to the optically thin regime takes place - at about 2.9e13 Hz.
We then show that the jet's optically thin synchrotron emission accounts for
the Cygnus X-1's emission beyond 400 keV, although it cannot alone explain its
3-200 keV continuum. A compact jet was also present during the second
observation, but we do not detect the break, since it has likely shifted to
higher frequencies. In contrast, the compact jet was absent during the last
observation, and we show that the 5-30 micron mid-infrared continuum of Cygnus
X-1 stems from the blue supergiant companion star HD 226868. Indeed, the
emission can then be understood as the combination of the photospheric
Raleigh-Jeans tail and the bremsstrahlung from the expanding stellar wind.
Moreover, the stellar wind is found to be clumpy, with a filling factor f
{\infty}~0.09-0.10. Its bremsstrahlung emission is likely anti-correlated to
the soft X-ray emission, suggesting an anti-correlation between the mass-loss
and mass-accretion rates. Nevertheless, we do not detect any mid-infared
spectroscopic evidence of interaction between the jets and the Cygnus X-1's
environment and/or companion star's stellar wind.
|
[{'version': 'v1', 'created': 'Mon, 2 May 2011 14:09:48 GMT'}]
|
2015-05-28
|
[array(['Rahoui', 'Farid', ''], dtype=object)
array(['Lee', 'Julia C.', ''], dtype=object)
array(['Heinz', 'Sebastian', ''], dtype=object)
array(['Hines', 'Dean C.', ''], dtype=object)
array(['Pottschmidt', 'Katja', ''], dtype=object)
array(['Wilms', 'Jörn', ''], dtype=object)
array(['Grinberg', 'Victoria', ''], dtype=object)]
|
17,851 |
1801.01765
|
Flavio Mercati
|
Flavio Mercati, Matteo Sergola
|
Pauli-Jordan Function and Scalar Field Quantization in
$\kappa$-Minkowski Noncommutative Spacetime
|
28 pages (+7 of appendices), 10 figures; added appendix on the
derivation of finite kappa-Poincar\'e transformations of momentum space from
the quantum group's commutation relations, updated references
|
Phys. Rev. D 98, 045017 (2018)
|
10.1103/PhysRevD.98.045017
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study a complex free scalar field theory on a noncommutative background
spacetime called $\kappa$-Minkowski. In particular we address the problem of
second quantization. We obtain the algebra of creation and annihilation
operators in an explicitly covariant way. Our procedure does not use
canonical/Hamiltonian formulations, which turn out to be ill-defined in our
context. Instead we work in a spacetime covariant way by introducing a
noncommutative Pauli-Jordan function. This function is obtained as a
generalization of the ordinary, commutative, one by taking into account the
constraints imposed by the symmetries of our noncommutative spacetime. The
Pauli-Jordan function is later employed to study the structure of the light
cone in $\kappa$-Minkowski spacetime, and to draw conclusions on the
superluminal propagation of signals.
|
[{'version': 'v1', 'created': 'Fri, 5 Jan 2018 14:32:15 GMT'}
{'version': 'v2', 'created': 'Thu, 14 Jun 2018 13:24:19 GMT'}]
|
2018-08-29
|
[array(['Mercati', 'Flavio', ''], dtype=object)
array(['Sergola', 'Matteo', ''], dtype=object)]
|
17,852 |
2204.00962
|
Gaurav Bhatnagar
|
Gaurav Bhatnagar, Krishnan Rajkumar
|
Telescoping continued fractions for the error term in Stirling's formula
|
Final version submitted to the Journal of Approximation Theory
accepted for publication. Please see ver 1 for partial proofs of some
observations and more discussion of the conjectures mentioned here
| null | null | null |
math.CA math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce telescoping continued fractions to find lower
bounds for the error term $r_n$ in Stirling's approximation $\displaystyle n! =
\sqrt{2\pi}n^{n+1/2}e^{-n}e^{r_n}.$ This improves lower bounds given earlier by
Ces\`{a}ro (1922), Robbins (1955), Nanjundiah (1959), Maria (1965) and Popov
(2017). The expression is in terms of a continued fraction, together with an
algorithm to find successive terms of this continued fraction. The technique we
introduce allows us to experimentally obtain upper and lower bounds for a
sequence of convergents of a continued fraction in terms of a difference of two
continued fractions.
|
[{'version': 'v1', 'created': 'Sun, 3 Apr 2022 01:20:45 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Jun 2023 09:29:35 GMT'}]
|
2023-07-03
|
[array(['Bhatnagar', 'Gaurav', ''], dtype=object)
array(['Rajkumar', 'Krishnan', ''], dtype=object)]
|
17,853 |
1603.07456
|
Hatem Hajri
|
Hatem Hajri (IMS), Caglar Mine, Marc Arnaudon (IMB)
|
Application of Stochastic Flows to the Sticky Brownian Motion Equation
| null |
Electronic Communications in Probability, Institute of
Mathematical Statistics (IMS), 2016
| null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show how the theory of stochastic flows allows to recover in an elementary
way a well known result of Warren on the sticky Brownian motion equation.
|
[{'version': 'v1', 'created': 'Thu, 24 Mar 2016 07:35:09 GMT'}
{'version': 'v2', 'created': 'Tue, 27 Dec 2016 21:27:15 GMT'}]
|
2016-12-30
|
[array(['Hajri', 'Hatem', '', 'IMS'], dtype=object)
array(['Mine', 'Caglar', '', 'IMB'], dtype=object)
array(['Arnaudon', 'Marc', '', 'IMB'], dtype=object)]
|
17,854 |
2112.13534
|
Wooju Lee
|
Wooju Lee and Hyun Myung
|
Adversarial Attack for Asynchronous Event-based Data
|
8 pages, 6 figures, Thirty-Sixth AAAI Conference on Artificial
Intelligence (AAAI-22)
| null | null | null |
cs.CV cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep neural networks (DNNs) are vulnerable to adversarial examples that are
carefully designed to cause the deep learning model to make mistakes.
Adversarial examples of 2D images and 3D point clouds have been extensively
studied, but studies on event-based data are limited. Event-based data can be
an alternative to a 2D image under high-speed movements, such as autonomous
driving. However, the given adversarial events make the current deep learning
model vulnerable to safety issues. In this work, we generate adversarial
examples and then train the robust models for event-based data, for the first
time. Our algorithm shifts the time of the original events and generates
additional adversarial events. Additional adversarial events are generated in
two stages. First, null events are added to the event-based data to generate
additional adversarial events. The perturbation size can be controlled with the
number of null events. Second, the location and time of additional adversarial
events are set to mislead DNNs in a gradient-based attack. Our algorithm
achieves an attack success rate of 97.95\% on the N-Caltech101 dataset.
Furthermore, the adversarial training model improves robustness on the
adversarial event data compared to the original model.
|
[{'version': 'v1', 'created': 'Mon, 27 Dec 2021 06:23:43 GMT'}]
|
2021-12-28
|
[array(['Lee', 'Wooju', ''], dtype=object)
array(['Myung', 'Hyun', ''], dtype=object)]
|
17,855 |
1009.1918
|
Brandon P. van Zyl
|
Aaron Farrell and Brandon P. van Zyl
|
s-wave scattering and the zero-range limit of the finite square well in
arbitrary dimensions
| null | null |
10.1139/P10-061
| null |
quant-ph cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We examine the zero-range limit of the finite square well in arbitrary
dimensions through a systematic analysis of the reduced, s-wave two-body
time-independent Schr\"odinger equation. A natural consequence of our
investigation is the requirement of a delta-function multiplied by a
regularization operator to model the zero-range limit of the finite-square well
when the dimensionality is greater than one. The case of two dimensions turns
out to be surprisingly subtle, and needs to be treated separately from all
other dimensions.
|
[{'version': 'v1', 'created': 'Fri, 10 Sep 2010 01:25:33 GMT'}]
|
2015-05-19
|
[array(['Farrell', 'Aaron', ''], dtype=object)
array(['van Zyl', 'Brandon P.', ''], dtype=object)]
|
17,856 |
cond-mat/0401049
|
David Ward
|
David W. Ward, Eric Statz, Jaime D. Beers, Nikolay Stoyanov, Thomas
Feurer, Ryan M. Roth, Richard M. Osgood, and Keith A. Nelson
|
Phonon-Polariton Propagation, Guidance, and Control in Bulk and
Patterned Thin Film Ferroelectric Crystals
|
6 pages, 4 figures, published in proceedings of the Materials
Research Society Fall meeting, Boston, MA, 2003
|
Ferroelectric Thin Films XII: MRS Symposium Proceedings, Vol. 797,
edited by A. Kingon, et al (Materials Research Society, Pittsburgh, PA,
2003), pp. W5.9.1-6
| null | null |
cond-mat
| null |
Using time resolved ultrafast spectroscopy, we have demonstrated that the far
infrared (FIR) excitations in ferroelectric crystals may be modified through an
arsenal of control techniques from the fields of guided waves, geometrical and
Fourier optics, and optical pulse shaping. We show that LiNbO3 and LiTaO3
crystals of 10-250 micron thickness behave as slab waveguides for
phonon-polaritons, which are admixtures of electromagnetic waves and lattice
vibrations, when the polariton wavelength is on the order of or greater than
the crystal thickness. Furthermore, we show that ferroelectric crystals are
amenable to processing by ultrafast laser ablation, allowing for milling of
user-defined patterns designed for guidance and control of phonon-polariton
propagation. We have fabricated several functional structures including THz
rectangular waveguides, resonators, splitters/couplers, interferometers,
focusing reflectors, and diffractive elements. Electric field enhancement has
been obtained with the reflective structures, through spatial shaping, of the
optical excitation beam used for phonon-polariton generation, and through
temporal pulse shaping to permit repetitive excitation of a phonon-polariton
resonant cavity.
|
[{'version': 'v1', 'created': 'Tue, 6 Jan 2004 16:47:18 GMT'}]
|
2007-05-23
|
[array(['Ward', 'David W.', ''], dtype=object)
array(['Statz', 'Eric', ''], dtype=object)
array(['Beers', 'Jaime D.', ''], dtype=object)
array(['Stoyanov', 'Nikolay', ''], dtype=object)
array(['Feurer', 'Thomas', ''], dtype=object)
array(['Roth', 'Ryan M.', ''], dtype=object)
array(['Osgood', 'Richard M.', ''], dtype=object)
array(['Nelson', 'Keith A.', ''], dtype=object)]
|
17,857 |
1604.05346
|
Viacheslav Sadykov
|
V.M. Sadykov, A.G. Kosovichev, I.N. Sharykin, I.V. Zimovets, S. Vargas
Dominguez
|
Relationship between chromospheric evaporation and magnetic field
topology in M-class solar flare
|
27 pages, 6 figures
| null |
10.3847/0004-637X/828/1/4
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Chromospheric evaporation is observed as Doppler blueshift during solar
flares. It plays one of key roles in dynamics and energetics of solar flares,
however, its mechanism is still unknown. In this paper we present a detailed
analysis of spatially-resolved multi-wavelength observations of chromospheric
evaporation during an M 1.0 class solar flare (SOL2014-06-12T21:12) using data
from the NASA's IRIS (Interface Region Imaging Spectrograph) and HMI/SDO
(Helioseismic and Magnetic Imager onboard Solar Dynamics Observatory)
telescopes, and VIS/NST (Visible Imaging Spectrometer at New Solar Telescope)
high-resolution observations, covering the temperature range from 10^4 K to
10^7 K. The results show that the averaged over the region Fe XXI blueshift of
the hot evaporating plasma is delayed relative to the C II redshift of the
relatively cold chromospheric plasma by about 1 min. The spatial distribution
of the delays is not uniform across the region and can be as long as 2 min in
several zones. Using vector magnetograms from HMI we reconstruct the magnetic
field topology and the quasi-separatrix layer (QSL) and find that the blueshift
delay regions as well as the H-alpha flare ribbons are connected to the region
of magnetic polarity inversion line (PIL) and an expanding flux rope via a
system of low-lying loop arcades with height < ~4.5 Mm. This allows us to
propose an interpretation of the chromospheric evaporation based on the
geometry of local magnetic fields, and the primary energy source associated
with the PIL.
|
[{'version': 'v1', 'created': 'Mon, 18 Apr 2016 20:32:03 GMT'}]
|
2016-08-31
|
[array(['Sadykov', 'V. M.', ''], dtype=object)
array(['Kosovichev', 'A. G.', ''], dtype=object)
array(['Sharykin', 'I. N.', ''], dtype=object)
array(['Zimovets', 'I. V.', ''], dtype=object)
array(['Dominguez', 'S. Vargas', ''], dtype=object)]
|
17,858 |
1009.1550
|
Aswath Babu H.
|
H. Aswath Babu and Harshawardhan Wanare
|
Non-linear dynamics of double-cavity optical bistability of three-level
ladder system
|
7 Pages, 9 figures. Feedback is welcome
|
Phys. Rev. A 83, 033819 (2011)
|
10.1103/PhysRevA.83.033819
| null |
nlin.CD physics.optics quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present non-linear dynamical features of two-photon double-cavity optical
bistability exhibited by a three level ladder system in the mean field limit.
The system exhibits a hump like feature in the lower branch of the bistable
response, wherein a new region of instability develops. The system displays a
range of dynamical features varying from normal stable switching, periodic
self-pulsing to a period-doubling route to chaos. The inclusion of two
competing cooperative atom-field couplings leads to such rich nonlinear
dynamical behavior. We provide a domain map that clearly delineates the various
regions of stability that will aid the realization of any desired dynamics. We
also present bifurcation diagram and the associated supporting evidence that
clearly identifies the period-doubling route to chaos, which occurs at low
input light levels.
|
[{'version': 'v1', 'created': 'Wed, 8 Sep 2010 14:40:49 GMT'}
{'version': 'v2', 'created': 'Thu, 9 Sep 2010 08:28:43 GMT'}]
|
2011-04-18
|
[array(['Babu', 'H. Aswath', ''], dtype=object)
array(['Wanare', 'Harshawardhan', ''], dtype=object)]
|
17,859 |
1202.1266
|
Chia Ying Lee
|
Chia Ying Lee
|
Stochastic simulation of biochemical systems with randomly fluctuating
rate constants
| null | null | null | null |
q-bio.QM q-bio.MN
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In an experimental study of single enzyme reactions, it has been proposed
that the rate constants of the enzymatic reactions fluctuate randomly,
according to a given distribution. To quantify the uncertainty arising from
random rate constants, it is necessary to investigate how one can simulate such
a biochemical system. To do this, we will take the Gillespie's stochastic
simulation algorithm for simulating the evolution of the state of a chemical
system, and study a modification of the algorithm that incorporates the random
rate constants. In addition to simulating the waiting time of each reaction
step, the modified algorithm also involves simulating the random fluctuation of
the rate constant at each reaction time. We consider the modified algorithm in
a general framework, then specialize it to two contrasting physical models, one
in which the fluctuations occur on a much faster time scale than the reaction
step, and the other in which the fluctuations occur much more slowly. The
latter case was applied to the single enzyme reaction system, using in part the
Metropolis-Hastings algorithm to enact the given distribution on the random
rate constants. The modified algorithm is shown to produce simulation outputs
that are corroborated by the experimental results. It is hoped that this
modified algorithm can subsequently be used as a tool for the estimation or
calibration of parameters in the system using experimental data.
|
[{'version': 'v1', 'created': 'Mon, 6 Feb 2012 20:28:20 GMT'}]
|
2012-02-07
|
[array(['Lee', 'Chia Ying', ''], dtype=object)]
|
17,860 |
1402.0692
|
Arpad Baricz
|
\'Arp\'ad Baricz, R\'obert Sz\'asz
|
Close-to-convexity of some special functions and their derivatives
|
6 pages
|
Bulletin of the Malaysian Mathematical Sciences Society 39(1)
(2016) 427-437
|
10.1007/s40840-015-0180-7
| null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper our aim is to deduce some sufficient (and necessary) conditions
for the close-to-convexity of some special functions and their derivatives,
like Bessel functions, Struve functions, and a particular case of Lommel
functions of the first kind, which can be expressed in terms of the
hypergeometric function ${}_1F_2$. The key tool in our proofs is a result of
Shah and Trimble about transcendental entire functions with univalent
derivatives. Moreover, a known result of P\'olya on entire functions, the
infinite product representations and some results on zeros of Bessel, Struve
and Lommel functions of the first kind are used in order to achieve the main
results of the paper.
|
[{'version': 'v1', 'created': 'Tue, 4 Feb 2014 11:09:05 GMT'}]
|
2016-01-11
|
[array(['Baricz', 'Árpád', ''], dtype=object)
array(['Szász', 'Róbert', ''], dtype=object)]
|
17,861 |
2108.04939
|
Brian Vegetabile
|
Brian G. Vegetabile
|
On the Distinction Between "Conditional Average Treatment Effects"
(CATE) and "Individual Treatment Effects" (ITE) Under Ignorability
Assumptions
|
6 pages, 3 figures; Presented at 2021 ICML Workshop, "The Neglected
Assumptions in Causal Inference", July 2021
| null | null | null |
stat.ME cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent years have seen a swell in methods that focus on estimating
"individual treatment effects". These methods are often focused on the
estimation of heterogeneous treatment effects under ignorability assumptions.
This paper hopes to draw attention to the fact that there is nothing
necessarily "individual" about such effects under ignorability assumptions and
isolating individual effects may require additional assumptions. Such
individual effects, more often than not, are more precisely described as
"conditional average treatment effects" and confusion between the two has the
potential to hinder advances in personalized and individualized effect
estimation.
|
[{'version': 'v1', 'created': 'Tue, 10 Aug 2021 21:52:31 GMT'}]
|
2021-08-12
|
[array(['Vegetabile', 'Brian G.', ''], dtype=object)]
|
17,862 |
1706.00609
|
Richard Katz
|
Andrew J Turner, Richard F Katz, Mark D Behn, Tobias Keller
|
Magmatic focusing to mid-ocean ridges: the role of grain size
variability and non-Newtonian viscosity
|
20 pages, 4 figures, 1 table
| null |
10.1002/2017GC007048
| null |
physics.geo-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Melting beneath mid-ocean ridges occurs over a region that is much broader
than the zone of magmatic emplacement to form the oceanic crust. Magma is
focused into this zone by lateral transport. This focusing has typically been
explained by dynamic pressure gradients associated with corner flow, or by a
sub-lithospheric channel sloping upward toward the ridge axis. Here we discuss
a novel mechanism for magmatic focusing: lateral transport driven by gradients
in compaction pressure within the asthenosphere. These gradients arise from the
co-variation of melting rate and compaction viscosity. The compaction
viscosity, in previous models, was given as a function of melt fraction and
temperature. In contrast, we show that the viscosity variations relevant to
melt focusing arise from grain-size variability and non-Newtonian creep. The
asthenospheric distribution of melt fraction predicted by our models provides
an improved ex- planation of the electrical resistivity structure beneath one
location on the East Pacific Rise. More generally, although grain size and
non-Newtonian viscosity are properties of the solid phase, we find that in the
context of mid-ocean ridges, their effect on melt transport is more profound
than their effect on the mantle corner-flow.
|
[{'version': 'v1', 'created': 'Fri, 2 Jun 2017 10:02:34 GMT'}]
|
2018-02-14
|
[array(['Turner', 'Andrew J', ''], dtype=object)
array(['Katz', 'Richard F', ''], dtype=object)
array(['Behn', 'Mark D', ''], dtype=object)
array(['Keller', 'Tobias', ''], dtype=object)]
|
17,863 |
2204.09605
|
Arthur Vangeffelen
|
Arthur Vangeffelen, Geert Buckinx, Carlo De Servi, Maria Rosaria
Vetrano, Martine Baelmans
|
Nusselt number for steady periodically developed heat transfer in micro-
and mini-channels with arrays of offset strip fins subject to a uniform heat
flux
|
This article may be downloaded for personal use only. Any other use
requires prior permission of the author and Elsevier Publishing. This article
appeared in International Journal of Heat and Mass Transfer 195, 123145
(2022) and may be found at
https://www.sciencedirect.com/science/article/pii/S0017931022006160; 63
pages, 21 figures, 3 tables
|
International Journal of Heat and Mass Transfer 195, 123145 (2022)
|
10.1016/j.ijheatmasstransfer.2022.123145
| null |
physics.flu-dyn physics.app-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, the Nusselt number is examined for periodically developed heat
transfer in micro- and mini-channels with arrays of offset strip fins, subject
to a constant heat flux. The Nusselt number is defined on the basis of a heat
transfer coefficient which represents the spatially constant macro-scale
temperature difference between the fluid and solid during conjugate heat
transfer. Its values are determined numerically on a single unit cell of the
array for Reynolds numbers between 1 and 600. Two combinations of the Prandtl
number and the thermal conductivity ratio are selected, corresponding to air
and water. It is shown that the Nusselt number correlations from the literature
mainly apply to air in the transitional flow regime in larger conventional
channels if the wall temperature remains uniform. As a result, they do not
correctly capture the observed trends for the Nusselt number in micro- and
mini-channels subject to a constant heat flux. Therefore, new Nusselt number
correlations, obtained through a least-squares fitting of 2282 numerical
simulations, are presented for air and water. The suitability of these
correlations is assessed via the Bayesian approach for parameter estimation and
model validation. The correlations respect the observed asymptotic trends and
limits of the Nusselt number for all the geometrical parameters of the offset
strip fins. In addition, they predict a linear dependence of the Nusselt number
on the Reynolds number, in good agreement with the data from this work.
Nevertheless, a detailed analysis reveals a more complex scaling of the Nusselt
number with the Reynolds number, closely related to the underlying flow
regimes, particularly the weak and strong inertia regimes. Finally, through 62
additional simulations, the influence of the material properties on the Nusselt
number is illustrated and compared to the available literature.
|
[{'version': 'v1', 'created': 'Wed, 20 Apr 2022 16:34:28 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Jun 2022 09:15:54 GMT'}]
|
2022-06-28
|
[array(['Vangeffelen', 'Arthur', ''], dtype=object)
array(['Buckinx', 'Geert', ''], dtype=object)
array(['De Servi', 'Carlo', ''], dtype=object)
array(['Vetrano', 'Maria Rosaria', ''], dtype=object)
array(['Baelmans', 'Martine', ''], dtype=object)]
|
17,864 |
1605.09781
|
Ivan Tomba
|
Massimo Ferri, Ivan Tomba, Andrea Visotti, Ignazio Stanganelli
|
A feasibility study for a persistent homology based k-Nearest Neighbor
search algorithm in melanoma detection
| null | null | null | null |
q-bio.QM math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Persistent Homology is a fairly new branch of Computational Topology which
combines geometry and topology for an effective shape description of use in
Pattern Recognition. In particular it registers through "Betti Numbers" the
presence of holes and their persistence while a parameter ("filtering
function") is varied. In this paper, some recent developments in this field are
integrated in a k-Nearest Neighbor search algorithm suited for an automatic
retrieval of melanocytic lesions. Since long, dermatologists use five
morphological parameters (A = Asymmetry, B = Boundary, C = Color, D = Diameter,
E = Elevation or Evolution) for assessing the malignancy of a lesion. The
algorithm is based on a qualitative assessment of the segmented images by
computing both 1 and 2-dimensional Persistent Betti Numbers functions related
to the ABCDE parameters and to the internal texture of the lesion. The results
of a feasibility test on a set of 107 melanocytic lesions are reported in the
section dedicated to the numerical experiments.
|
[{'version': 'v1', 'created': 'Mon, 4 Apr 2016 17:16:47 GMT'}]
|
2016-06-01
|
[array(['Ferri', 'Massimo', ''], dtype=object)
array(['Tomba', 'Ivan', ''], dtype=object)
array(['Visotti', 'Andrea', ''], dtype=object)
array(['Stanganelli', 'Ignazio', ''], dtype=object)]
|
17,865 |
astro-ph/9701190
|
Rob Fender
|
R.P. Fender (University of Sussex, UK), R.E. Spencer, S.J. Newell,
A.K. Tzioumis
|
High-resolution radio observations of GX 339-4
|
4 pages, LaTeX, 4 figures (included). Accepted for publication in
MNRAS
| null | null | null |
astro-ph
| null |
We present radio observations of the black hole candidate X-ray binary GX
339-4 with the Australia Telescope compact array. Mapping of the highest
resolution 3.5 cm data reveals a jet-like extension, which if confirmed would
be the first detection of a radio jet from a persistent black-hole candidate
system. No evidence is found for associated structures such as bow shocks or
jet lobes on larger scales. The spectral energy distribution from 22 - 3 cm is
relatively flat, suggesting emission is dominated by a compact absorbed core.
|
[{'version': 'v1', 'created': 'Fri, 24 Jan 1997 10:38:02 GMT'}]
|
2007-05-23
|
[array(['Fender', 'R. P.', '', 'University of Sussex, UK'], dtype=object)
array(['Spencer', 'R. E.', ''], dtype=object)
array(['Newell', 'S. J.', ''], dtype=object)
array(['Tzioumis', 'A. K.', ''], dtype=object)]
|
17,866 |
1408.2134
|
Wei Wang
|
Zhi L\"u, Wei Wang
|
Equivariant cohomology Chern numbers determine equivariant unitary
bordism for torus groups
|
13 pages. This is the new version to cover the previous version
"Equivariant unitary bordism and equivariant cohomology Chern numbers" in
2014
|
Algebr. Geom. Topol. 18 (2018) 4143-4160
|
10.2140/agt.2018.18.4143
| null |
math.AT math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper shows that the integral equivariant cohomology Chern numbers
completely determine the equivariant geometric unitary bordism classes of
closed unitary $G$-manifolds, which gives an affirmative answer to the
conjecture posed by Guillemin--Ginzburg--Karshon in [20, Remark H.5, $\S3$,
Appendix H], where $G$ is a torus. As a further application, we also obtain a
satisfactory solution of [20, Question (A), $\S1.1$, Appendix H] on unitary
Hamiltonian $G$-manifolds. Our key ingredients in the proof are the universal
toric genus defined by Buchstaber--Panov--Ray and the Kronecker pairing of
bordism and cobordism. Our approach heavily exploits Quillen's geometric
interpretation of homotopic unitary cobordism theory. Moreover, this method can
also be applied to the study of $({\Bbb Z}_2)^k$-equivariant unoriented bordism
and can still derive the classical result of tom Dieck.
|
[{'version': 'v1', 'created': 'Sat, 9 Aug 2014 16:19:51 GMT'}
{'version': 'v2', 'created': 'Sat, 16 Mar 2019 07:07:31 GMT'}]
|
2019-03-19
|
[array(['Lü', 'Zhi', ''], dtype=object)
array(['Wang', 'Wei', ''], dtype=object)]
|
17,867 |
1101.5697
|
Yang Han
|
Yang Han
|
Recollements and Hochschild theory
|
18 pages
| null | null | null |
math.RA math.KT math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is shown that a recollement of derived categories of algebras induces
those of tensor product algebras and opposite algebras respectively, which is
applied to clarify the relations between recollements of derived categories of
algebras and smoothness and Hochschild cohomology of algebras.
|
[{'version': 'v1', 'created': 'Sat, 29 Jan 2011 14:39:00 GMT'}
{'version': 'v2', 'created': 'Tue, 26 Apr 2011 12:59:48 GMT'}
{'version': 'v3', 'created': 'Wed, 12 Oct 2011 05:45:44 GMT'}
{'version': 'v4', 'created': 'Thu, 28 Feb 2013 05:27:46 GMT'}
{'version': 'v5', 'created': 'Mon, 2 Sep 2013 04:43:31 GMT'}]
|
2013-09-03
|
[array(['Han', 'Yang', ''], dtype=object)]
|
17,868 |
0905.2652
|
Emmanuel Davoust
|
Jerome Lamy, Emmanuel Davoust
|
General-purpose and dedicated regimes in the use of telescopes
|
22 pages, pdf only, accepted for publication in Journal for
Astronomical History and Heritage
| null | null | null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a sociohistorical framework for better understanding the evolution
in the use of telescopes. We define two regimes of use : a general-purpose (or
survey) one, where the telescope governs research, and a dedicated one, in
which the telescope is tailored to a specific project which includes a network
of other tools. This conceptual framework is first applied to the history of
the 80-cm telescope of Toulouse Observatory, which is initially anchored in a
general-purpose regime linked to astrometry. After a transition in the 1930s,
it is integrated in a dedicated regime centered on astrophysics. This evolution
is compared to that of a very similar instrument, the 80-cm telescope of
Marseille Observatory, which converts early on to the dedicated regime with the
Fabry-Perot interferometer around 1910, and, after a period of idleness, is
again used in the survey mode after WWII. To further validate our new concept,
we apply it to the telescopes of Washburn Observatory, of Dominion
Astrophysical Observatory and of Meudon Observatory. The uses of the different
telescopes illustrate various combinations of the two regimes, which can be
successive, simultaneous or alternating. This conceptual framework is likely to
be applicable to other fields of pure and applied science.
|
[{'version': 'v1', 'created': 'Mon, 18 May 2009 14:06:23 GMT'}]
|
2009-05-19
|
[array(['Lamy', 'Jerome', ''], dtype=object)
array(['Davoust', 'Emmanuel', ''], dtype=object)]
|
17,869 |
2201.12959
|
Yi Sheng Chai
|
Peipei Lu, Haifeng Du, Le Wang, Hang Li, Wenhong Wang, Youguo Shi,
Xueliang Wu, Young Sun and Yisheng Chai
|
Comparison of skyrmion phases between poly and single-crystal MnSi by
composite magnetoelectric method
|
14 pages, 5 figures,submitted
| null |
10.1063/5.0095109
| null |
cond-mat.mtrl-sci cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have explored the skyrmion phases and phase diagram of poly and
single-crystal MnSi by the measurements of the magnetoelectric coefficient
alfaE and ac magnetic susceptibility of the MnSi/PMN-PT composite. We found
that the regular skyrmion lattice phase in single crystal sample has been
averaged in the MnSi polycrystal due to random grain orientations which results
in an extended skyrmion lattice-conical mixture phase down to 25 K. The
magnitude of the out-of-phase component in alfaE of the polycrystal, not single
crystal, decreases gradually with decreasing frequency. With the changing of
the driven ac field, it reveals a depinning threshold behavior in both samples.
The depinning field is stronger in the polycrystal than that in single crystal
and maybe responsible for the diminishing of dissipative behavior at lower
frequency due to grain boundaries and defects. The composite magnetoelectric
method provides a unique approach to probe topological phase dynamics.
|
[{'version': 'v1', 'created': 'Mon, 31 Jan 2022 02:03:08 GMT'}
{'version': 'v2', 'created': 'Sat, 9 Apr 2022 01:32:22 GMT'}]
|
2022-05-18
|
[array(['Lu', 'Peipei', ''], dtype=object)
array(['Du', 'Haifeng', ''], dtype=object)
array(['Wang', 'Le', ''], dtype=object)
array(['Li', 'Hang', ''], dtype=object)
array(['Wang', 'Wenhong', ''], dtype=object)
array(['Shi', 'Youguo', ''], dtype=object)
array(['Wu', 'Xueliang', ''], dtype=object)
array(['Sun', 'Young', ''], dtype=object)
array(['Chai', 'Yisheng', ''], dtype=object)]
|
17,870 |
2207.08653
|
Guodong Ding
|
Guodong Ding and Angela Yao
|
Leveraging Action Affinity and Continuity for Semi-supervised Temporal
Action Segmentation
|
16 pages, 5 figures
| null | null | null |
cs.CV cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a semi-supervised learning approach to the temporal action
segmentation task. The goal of the task is to temporally detect and segment
actions in long, untrimmed procedural videos, where only a small set of videos
are densely labelled, and a large collection of videos are unlabelled. To this
end, we propose two novel loss functions for the unlabelled data: an action
affinity loss and an action continuity loss. The action affinity loss guides
the unlabelled samples learning by imposing the action priors induced from the
labelled set. Action continuity loss enforces the temporal continuity of
actions, which also provides frame-wise classification supervision. In
addition, we propose an Adaptive Boundary Smoothing (ABS) approach to build
coarser action boundaries for more robust and reliable learning. The proposed
loss functions and ABS were evaluated on three benchmarks. Results show that
they significantly improved action segmentation performance with a low amount
(5% and 10%) of labelled data and achieved comparable results to full
supervision with 50% labelled data. Furthermore, ABS succeeded in boosting
performance when integrated into fully-supervised learning.
|
[{'version': 'v1', 'created': 'Mon, 18 Jul 2022 14:52:37 GMT'}
{'version': 'v2', 'created': 'Thu, 21 Jul 2022 05:46:37 GMT'}]
|
2022-07-22
|
[array(['Ding', 'Guodong', ''], dtype=object)
array(['Yao', 'Angela', ''], dtype=object)]
|
17,871 |
2303.08727
|
Choubo Ding
|
Choubo Ding, Guansong Pang, Chunhua Shen
|
Background Matters: Enhancing Out-of-distribution Detection with Domain
Features
|
14 pages
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Detecting out-of-distribution (OOD) inputs is a principal task for ensuring
the safety of deploying deep-neural-network classifiers in open-world
scenarios. OOD samples can be drawn from arbitrary distributions and exhibit
deviations from in-distribution (ID) data in various dimensions, such as
foreground semantic features (e.g., vehicle images vs. ID samples in fruit
classification) and background domain features (e.g., textural images vs. ID
samples in object recognition). Existing methods focus on detecting OOD samples
based on the semantic features, while neglecting the other dimensions such as
the domain features. This paper considers the importance of the domain features
in OOD detection and proposes to leverage them to enhance the
semantic-feature-based OOD detection methods. To this end, we propose a novel
generic framework that can learn the domain features from the ID training
samples by a dense prediction approach, with which different existing
semantic-feature-based OOD detection methods can be seamlessly combined to
jointly learn the in-distribution features from both the semantic and domain
dimensions. Extensive experiments show that our approach 1) can substantially
enhance the performance of four different state-of-the-art (SotA) OOD detection
methods on multiple widely-used OOD datasets with diverse domain features, and
2) achieves new SotA performance on these benchmarks.
|
[{'version': 'v1', 'created': 'Wed, 15 Mar 2023 16:12:14 GMT'}]
|
2023-03-16
|
[array(['Ding', 'Choubo', ''], dtype=object)
array(['Pang', 'Guansong', ''], dtype=object)
array(['Shen', 'Chunhua', ''], dtype=object)]
|
17,872 |
1910.09316
|
Ahmet \c{C}evik
|
Ahmet \c{C}evik
|
Axiom of Neutrosophic Choice
|
10 pages
| null | null | null |
math.GM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce neutrosophic choice functions, the neutrosophic counterpart of
the Axiom of Choice, prove some results, and discuss how it effects the
foundations of mathematics in a neutrosophic setting.
|
[{'version': 'v1', 'created': 'Sun, 13 Oct 2019 08:31:34 GMT'}]
|
2019-10-22
|
[array(['Çevik', 'Ahmet', ''], dtype=object)]
|
17,873 |
astro-ph/0201430
|
Michele Cappellari
|
Michele Cappellari
|
Efficient Multi-Gaussian Expansion of galaxies
|
11 pages, 13 figures, LaTeX, to be published in MNRAS; software
implementing the methods described in this paper is available at
http://www.strw.leidenuniv.nl/~mcappell/idl
|
Mon.Not.Roy.Astron.Soc.333:400,2002
|
10.1046/j.1365-8711.2002.05412.x
| null |
astro-ph
| null |
We describe a simple, efficient, robust and fully automatic algorithm for the
determination of a Multi-Gaussian Expansion (MGE) fit to galaxy images, to be
used as a parametrization for the galaxy stellar surface brightness. In most
cases the least-squares solution found by this method essentially corresponds
to the minimax, constant relative error, MGE approximation of the galaxy
surface brightness, with the chosen number of Gaussians. The algorithm is well
suited to be used with multiple resolution images (e.g., Hubble Space Telescope
[HST] and ground-based). It works orders of magnitude faster and is more
accurate than currently available methods. An alternative, more computing
intensive, fully linear algorithm, that is guaranteed to converge to the
smallest Chi^2 solution, is also discussed. Examples of MGE fits are presented
for objects with HST or ground-based photometry, including galaxies with
significant isophote twist.
|
[{'version': 'v1', 'created': 'Sun, 27 Jan 2002 13:51:19 GMT'}]
|
2011-07-18
|
[array(['Cappellari', 'Michele', ''], dtype=object)]
|
17,874 |
1305.6187
|
Steven Prestwich
|
S. D. Prestwich
|
Improved Branch-and-Bound for Low Autocorrelation Binary Sequences
|
Journal paper in preparation
| null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Low Autocorrelation Binary Sequence problem has applications in
telecommunications, is of theoretical interest to physicists, and has inspired
many optimisation researchers. Metaheuristics for the problem have progressed
greatly in recent years but complete search has not progressed since a
branch-and-bound method of 1996. In this paper we find four ways of improving
branch-and-bound, leading to a tighter relaxation, faster convergence to
optimality, and better empirical scalability.
|
[{'version': 'v1', 'created': 'Mon, 27 May 2013 11:57:40 GMT'}
{'version': 'v2', 'created': 'Tue, 23 Jul 2013 14:42:15 GMT'}]
|
2013-07-24
|
[array(['Prestwich', 'S. D.', ''], dtype=object)]
|
17,875 |
cond-mat/0601431
|
Takaaki Monnai
|
T.Monnai, A.Sugita, J.Hirashima, and K.Nakamura
|
Decay to the nonequilibrium steady state of the thermal diffusion in a
tilted periodic potential
|
16 pages, 5 figures
|
Physica D, 219, 177 (2006)
|
10.1016/j.physd.2006.06.004
| null |
cond-mat.stat-mech
| null |
We investigate asymptotic decay phenomenon towards the nonequilibrium steady
state of the thermal diffusion in the presence of a tilted periodic potential.
The parameter dependence of the decay rate is revealed by investigating the
Fokker-Planck (FP) equation in the low temperature case under the spatially
periodic boundary condition (PBC). We apply the WKB method to the associated
Schr\"odinger equation. While eigenvalues of the non-Hermitian FP operator are
complex in general, in a small tilting case the imaginary parts of the
eigenvalues are almost vanishing. Then the Schr\"odinger equation is solved
with PBC. The decay rate is analyzed in the context of quantum tunneling
through a triple-well effective periodic potential. In a large tilting case,
the imaginary parts of the eigenvalues of FP operator are crucial. We apply the
complex-valued WKB method to the Schr\"odinger equation with the absorbing
boundary condition, finding that the decay rate saturates and depends only on
the temperature, the potential periodicity and the viscous constant. The
intermediate tilting case is also explored. The analytic results agree well
with the numerical data for a wide range of tilting.
|
[{'version': 'v1', 'created': 'Thu, 19 Jan 2006 15:38:05 GMT'}
{'version': 'v2', 'created': 'Fri, 20 Jan 2006 08:28:28 GMT'}]
|
2009-11-11
|
[array(['Monnai', 'T.', ''], dtype=object)
array(['Sugita', 'A.', ''], dtype=object)
array(['Hirashima', 'J.', ''], dtype=object)
array(['Nakamura', 'K.', ''], dtype=object)]
|
17,876 |
1111.3703
|
Qiaofu Zhang
|
QiaoFu Zhang, JunZhi Cui
|
Existence of Rosseland equation
|
3 pages(Full Version 10 pages)
| null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The global boundness, existence and uniqueness are presented for the kind of
Rosseland equation with a small parameter. This problem comes from
conduction-radiation coupled heat transfer in the composites; it's with
coefficients of high order growth and mixed boundary conditions.
A linearized map is constructed by fixing the function variables in the
coefficients and the right-hand side. The solution to the linearized problem is
uniformly bounded based on De Giorgi iteration; it is bounded in the H\"older
space from a Sobolev-Campanato estimate.
This linearized map is compact and continuous so that there exists a fixed
point.
All of these estimates are independent of the small parameter.
At the end, the uniqueness of the solution holds if there is a big zero-order
term and the solution's gradient is bounded.
This existence theorem can be extended to the nonlinear parabolic problem.
|
[{'version': 'v1', 'created': 'Wed, 16 Nov 2011 01:38:19 GMT'}]
|
2011-11-17
|
[array(['Zhang', 'QiaoFu', ''], dtype=object)
array(['Cui', 'JunZhi', ''], dtype=object)]
|
17,877 |
2103.00715
|
Lorenzo Toniazzi
|
Boris Baeumer, Mih\'aly Kov\'acs, Lorenzo Toniazzi
|
Boundary conditions for nonlocal one-sided pseudo-differential operators
and the associated stochastic processes II
|
41 pages, submitted for publication
| null | null | null |
math.PR math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We connect boundary conditions for one-sided pseudo-differential operators
with the generators of modified one-sided L\'evy processes. On one hand this
allows modellers to use appropriate boundary conditions with confidence when
restricting the modelling domain. On the other hand it allows for numerical
techniques based on differential equation solvers to obtain fast approximations
of densities or other statistical properties of restricted one-sided L\'evy
processes encountered, for example, in finance. In particular we identify a new
nonlocal mass conserving boundary condition by showing it corresponds to
fast-forwarding, i.e. removing the time the process spends outside the domain.
We treat all combinations of killing, reflecting and fast-forwarding boundary
conditions.
In Part I we show wellposedness of the backward and forward Cauchy problems
with a one-sided pseudo-differential operator with boundary conditions as
generator. We do so by showing convergence of Feller semigroups based on grid
point approximations of the modified L\'evy process.
In Part II we show that the limiting Feller semigroup is indeed the semigroup
associated with the modified L\'evy process by showing continuity of the
modifications with respect to the Skorokhod topology.
|
[{'version': 'v1', 'created': 'Mon, 1 Mar 2021 03:01:25 GMT'}]
|
2021-03-02
|
[array(['Baeumer', 'Boris', ''], dtype=object)
array(['Kovács', 'Mihály', ''], dtype=object)
array(['Toniazzi', 'Lorenzo', ''], dtype=object)]
|
17,878 |
2306.10528
|
Tian Xie
|
Tian Xie and Juntao Fang and Shenggang wan and Changsheng Xie and
Xubin He
|
Boosting the Performance of Degraded Reads in RS-coded Distributed
Storage Systems
| null | null | null | null |
cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Reed-Solomon (RS) codes have been increasingly adopted by distributed storage
systems in place of replication,because they provide the same level of
availability with much lower storage overhead. However, a key drawback of those
RS-coded distributed storage systems is the poor latency of degraded reads,
which can be incurred by data failures or hot spots,and are not rare in
production environments. To address this issue, we propose a novel parallel
reconstruction solution called APLS. APLS leverages all surviving source nodes
to send the data needed by degraded reads and chooses light-loaded starter
nodes to receive the reconstructed data of those degraded reads. Hence, the
latency of the degraded reads can be improved.Prototyping-based experiments are
conducted to compare APLS with ECPipe, the state-of-the-art solution of
improving the latency of degraded reads. The experimental results demonstrate
that APLS effectively reduces the latency, particularly under heavy or medium
workloads.
|
[{'version': 'v1', 'created': 'Sun, 18 Jun 2023 11:14:15 GMT'}]
|
2023-06-21
|
[array(['Xie', 'Tian', ''], dtype=object)
array(['Fang', 'Juntao', ''], dtype=object)
array(['wan', 'Shenggang', ''], dtype=object)
array(['Xie', 'Changsheng', ''], dtype=object)
array(['He', 'Xubin', ''], dtype=object)]
|
17,879 |
math/0702143
|
Maria Jesus de la Puente
|
M. Ansola, M.J. de la Puente
|
Tropical conics for the layman
|
19 pages, 4 figures. Major rewriting of formerly entitled paper
"Metric invariants of tropical conics and factorization of degree--two
homogeneous tropical polynomials in three variables". To appear in Idempotent
and tropical mathematics and problems of mathematical physics (vol. II), G.
Litvinov, V. Maslov, S. Sergeev (eds.), Proceedings Workshop, Moscow, 2007
| null | null | null |
math.AG math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a simple and elementary procedure to sketch the tropical conic
given by a degree--two homogeneous tropical polynomial. These conics are trees
of a very particular kind. Given such a tree, we explain how to compute a
defining polynomial.
Finally, we characterize those degree--two tropical polynomials which are
reducible and factorize them. We show that there exist irreducible degree--two
tropical polynomials giving rise to pairs of tropical lines.
|
[{'version': 'v1', 'created': 'Tue, 6 Feb 2007 14:32:26 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Oct 2007 14:16:02 GMT'}
{'version': 'v3', 'created': 'Thu, 16 Oct 2008 09:20:06 GMT'}]
|
2008-10-16
|
[array(['Ansola', 'M.', ''], dtype=object)
array(['de la Puente', 'M. J.', ''], dtype=object)]
|
17,880 |
0905.4153
|
Igor Sega
|
P. Prelovsek, I. Sega, and T. Tohyama
|
Analysis of transport properties of iron pnictides: spin-fluctuation
scenario
|
Revised version, 6 pages, 11 references added
|
Phys. Rev. B 80, 014517 (2009)
|
10.1103/PhysRevB.80.014517
| null |
cond-mat.str-el cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a phenomenological theory of quasiparticle scattering and
transport relaxation in the normal state of iron pnictides based on the
simplified two-band model coupled via spin fluctuations. In analogy with
anomalous properties of cuprates it is shown that a large and anomalous
normal-state resistivity and thermopower can be interpreted as the consequence
of strong coupling to spin fluctuations. The generalization to the
superconducting phase is also discussed.
|
[{'version': 'v1', 'created': 'Tue, 26 May 2009 09:51:14 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Jul 2009 12:20:16 GMT'}]
|
2015-05-13
|
[array(['Prelovsek', 'P.', ''], dtype=object)
array(['Sega', 'I.', ''], dtype=object)
array(['Tohyama', 'T.', ''], dtype=object)]
|
17,881 |
1902.09632
|
Claus Sorensen
|
Claus Sorensen
|
Koszul duality for Iwasawa algebras modulo p
|
25 pages
| null | null | null |
math.NT math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article we establish a version of Koszul duality for filtered rings
arising from $p$-adic Lie groups. Our precise setup is the following. We let
$G$ be a uniform pro-$p$ group and consider its completed group algebra
$\Omega=k[\![G]\!]$ with coefficients in a finite field $k$ of characteristic
$p$. It is known that $\Omega$ carries a natural filtration and $\text{gr}
\Omega=S(\frak{g})$ where $\frak{g}$ is the (abelian) Lie algebra of $G$ over
$k$. One of our main results in this paper is that the Koszul dual $\text{gr}
\Omega^!=\bigwedge \frak{g}^{\vee}$ can be promoted to an $A_{\infty}$-algebra
in such a way that the derived category of pseudocompact $\Omega$-modules
$D(\Omega)$ becomes equivalent to the derived category of strictly unital
$A_{\infty}$-modules $D_{\infty}(\bigwedge \frak{g}^{\vee})$. In the case where
$G$ is an abelian group we prove that the $A_{\infty}$-structure is trivial and
deduce an equivalence between $D(\Omega)$ and the derived category of
differential graded modules over $\bigwedge \frak{g}^{\vee}$ which generalizes
a result of Schneider for $\Bbb{Z}_p$.
|
[{'version': 'v1', 'created': 'Mon, 25 Feb 2019 21:52:12 GMT'}]
|
2019-02-27
|
[array(['Sorensen', 'Claus', ''], dtype=object)]
|
17,882 |
1407.3709
|
Florian Bertrand
|
Florian Bertrand, Giuseppe Della Sala
|
Riemann-Hilbert problems with constraints
|
10 pages
| null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper is devoted to Riemann-Hilbert problems with constraints. We obtain
results characterizing the existence of solutions as well as the dimension of
the solution space in terms of certain indices. As an application, we show how
such results may be used to construct analytic discs attached to singular
manifolds.
|
[{'version': 'v1', 'created': 'Mon, 14 Jul 2014 16:04:07 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Jul 2014 13:36:21 GMT'}
{'version': 'v3', 'created': 'Mon, 13 Jun 2016 14:56:58 GMT'}
{'version': 'v4', 'created': 'Thu, 13 Apr 2017 08:24:00 GMT'}
{'version': 'v5', 'created': 'Tue, 21 Aug 2018 14:04:50 GMT'}]
|
2018-08-22
|
[array(['Bertrand', 'Florian', ''], dtype=object)
array(['Della Sala', 'Giuseppe', ''], dtype=object)]
|
17,883 |
2304.08198
|
Richard Wentworth
|
Siqi He, Rafe Mazzeo, Xuesen Na, Richard Wentworth
|
The Algebraic and Analytic Compactifications of the Hitchin Moduli Space
|
38 pages. Minor edits
| null | null | null |
math.DG
|
http://creativecommons.org/licenses/by/4.0/
|
Following the work of Mazzeo-Swoboda-Weiss-Witt and Mochizuki, there is a map
$\overline{\Xi}$ between the algebraic compactification of the Dolbeault moduli
space of $\mathsf{SL}(2,\mathbb{C})$ Higgs bundles on a smooth projective curve
coming from the $\mathbb{C}^\ast$ action, and the analytic compactification of
Hitchin's moduli space of solutions to the $\mathsf{SU}(2)$ self-duality
equations on a Riemann surface obtained by adding solutions to the decoupled
equations, known as ``limiting configurations''. This map extends the classical
Kobayashi-Hitchin correspondence. The main result of this paper is that
$\overline{\Xi}$ fails to be continuous at the boundary over a certain subset
of the discriminant locus of the Hitchin fibration. This suggests the
possibility of a third, refined compactification which dominates both.
|
[{'version': 'v1', 'created': 'Mon, 17 Apr 2023 12:19:09 GMT'}
{'version': 'v2', 'created': 'Mon, 22 May 2023 04:58:27 GMT'}]
|
2023-05-23
|
[array(['He', 'Siqi', ''], dtype=object)
array(['Mazzeo', 'Rafe', ''], dtype=object)
array(['Na', 'Xuesen', ''], dtype=object)
array(['Wentworth', 'Richard', ''], dtype=object)]
|
17,884 |
nucl-th/0701065
|
Luigi Coraggio
|
L. Coraggio, A. Covello, A. Gargano, N. Itaco, D. R. Entem, T. T. S.
Kuo, and R. Machleidt
|
Low Momentum Nucleon-Nucleon Interactions and Shell-Model Calculations
|
8 pages, 8 figures, to be published in Physical Review C
|
Phys.Rev.C75:024311,2007
|
10.1103/PhysRevC.75.024311
| null |
nucl-th
| null |
In the last few years, the low-momentum nucleon-nucleon (NN) interaction
V-low-k derived from free-space NN potentials has been successfully used in
shell-model calculations. V-low-k is a smooth potential which preserves the
deuteron binding energy as well as the half-on-shell T-matrix of the original
NN potential up to a momentum cutoff Lambda. In this paper we put to the test a
new low-momentum NN potential derived from chiral perturbation theory at
next-to-next-to-next-to-leading order with a sharp low-momentum cutoff at 2.1
fm-1. Shell-model calculations for the oxygen isotopes using effective
hamiltonians derived from both types of low-momentum potential are performed.
We find that the two potentials show the same perturbative behavior and yield
very similar results.
|
[{'version': 'v1', 'created': 'Tue, 23 Jan 2007 09:05:14 GMT'}]
|
2008-11-26
|
[array(['Coraggio', 'L.', ''], dtype=object)
array(['Covello', 'A.', ''], dtype=object)
array(['Gargano', 'A.', ''], dtype=object)
array(['Itaco', 'N.', ''], dtype=object)
array(['Entem', 'D. R.', ''], dtype=object)
array(['Kuo', 'T. T. S.', ''], dtype=object)
array(['Machleidt', 'R.', ''], dtype=object)]
|
17,885 |
gr-qc/0010018
|
Tatyana P. Shestakova
|
T. P. Shestakova
|
The status of the Lambda term in quantum geometrodynamics in extended
phase space
|
LaTeX, 6 pages, talk presented at the IV International Conference
"Cosmion-99", Moscow, October 1999, to be published in the Conference
Proceedings
|
Grav.Cosmol.Suppl.6:47-50,2000
| null | null |
gr-qc
| null |
S. Weinberg pointed out a way to introduce a cosmological term by modifying
the theory of gravity. This modification would be justified if the Einstein
equations with the cosmological term could be obtained in the classical limit
of some physically satisfied quantum theory of gravity. We propose to consider
quantum geometrodynamics in extended phase space as a candidate for such a
theory. Quantum geometrodynamics in extended phase space aims at giving a
selfconsistent description of the integrated system ``the physical object (the
Universe) + observation means'', observation means being represented by a
reference frame. The Lambda term appears in classical equations under certain
gauge conditions and characterizes the state of gravitational vacuum related to
a chosen reference frame. The eigenvalue spectrum of Lambda depends on a
concrete cosmological model and can be found by solving the Schrodinger
equation for a wave function of the Universe. The proposed version of quantum
geometrodynamics enables one to make predictions concerning probable values of
the Lambda term at various stages of cosmological evolution.
|
[{'version': 'v1', 'created': 'Thu, 5 Oct 2000 11:47:58 GMT'}]
|
2011-04-15
|
[array(['Shestakova', 'T. P.', ''], dtype=object)]
|
17,886 |
1603.02589
|
Khizar Qureshi
|
Khizar Qureshi
|
Applications of Information Theory: Statistics and Statistical Mechanics
|
Principia, November 2015
| null | null | null |
math.ST stat.TH
|
http://creativecommons.org/licenses/by/4.0/
|
The method of optimizing entropy is used to (i) conduct Asymptotic Hypothesis
Testing and (ii) determine the particle distribution for which Entropy is
maximized. This paper focuses on two related applications of Information
Theory: Statistics and Statistical Mechanics.
|
[{'version': 'v1', 'created': 'Sat, 5 Mar 2016 22:03:30 GMT'}]
|
2016-03-09
|
[array(['Qureshi', 'Khizar', ''], dtype=object)]
|
17,887 |
2112.13618
|
Johannes Kraus
|
Q. Hong, J. Kraus, M. Kuchta, M. Lymbery, K.A. Mardal and M.E. Rognes
|
Robust approximation of generalized Biot-Brinkman problems
|
24 pages, 9 figures, 2 tables
| null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The generalized Biot-Brinkman equations describe the displacement, pressures
and fluxes in an elastic medium permeated by multiple viscous fluid networks
and can be used to study complex poromechanical interactions in geophysics,
biophysics and other engineering sciences. These equations extend on the Biot
and multiple-network poroelasticity equations on the one hand and Brinkman flow
models on the other hand, and as such embody a range of singular perturbation
problems in realistic parameter regimes. In this paper, we introduce,
theoretically analyze and numerically investigate a class of three-field finite
element formulations of the generalized Biot-Brinkman equations. By introducing
appropriate norms, we demonstrate that the proposed finite element
discretization, as well as an associated preconditioning strategy, is robust
with respect to the relevant parameter regimes. The theoretical analysis is
complemented by numerical examples.
|
[{'version': 'v1', 'created': 'Mon, 27 Dec 2021 11:41:07 GMT'}]
|
2021-12-28
|
[array(['Hong', 'Q.', ''], dtype=object)
array(['Kraus', 'J.', ''], dtype=object)
array(['Kuchta', 'M.', ''], dtype=object)
array(['Lymbery', 'M.', ''], dtype=object)
array(['Mardal', 'K. A.', ''], dtype=object)
array(['Rognes', 'M. E.', ''], dtype=object)]
|
17,888 |
nlin/0205026
|
Lev Tsimring
|
Philip Seliger, Lev S. Tsimring, Mikhail I. Rabinovich
|
Dynamical model of sequential spatial memory: winnerless competition of
patterns
|
4 pages, submitted to PRL
| null |
10.1103/PhysRevE.67.011905
| null |
nlin.AO q-bio.NC
| null |
We introduce a new biologically-motivated model of sequential spatial memory
which is based on the principle of winnerless competition (WLC). We implement
this mechanism in a two-layer neural network structure and present the learning
dynamics which leads to the formation of a WLC network. After learning, the
system is capable of associative retrieval of pre-recorded sequences of spatial
patterns.
|
[{'version': 'v1', 'created': 'Mon, 13 May 2002 18:58:09 GMT'}]
|
2009-11-07
|
[array(['Seliger', 'Philip', ''], dtype=object)
array(['Tsimring', 'Lev S.', ''], dtype=object)
array(['Rabinovich', 'Mikhail I.', ''], dtype=object)]
|
17,889 |
1608.07953
|
Conor Sexton
|
Conor Sexton, Quentin Bodinier, Arman Farhang, Nicola Marchetti,
Faouzi Bader, Luiz A. DaSilva
|
Coexistence of OFDM and FBMC for Underlay D2D Communication in 5G
Networks
|
7 pages, 9 figures, Accepted at IEEE Globecom 2016 Workshops
| null | null | null |
cs.NI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Device-to-device (D2D) communication is being heralded as an important part
of the solution to the capacity problem in future networks, and is expected to
be natively supported in 5G. Given the high network complexity and required
signalling overhead associated with achieving synchronization in D2D networks,
it is necessary to study asynchronous D2D communications. In this paper, we
consider a scenario whereby asynchronous D2D communication underlays an OFDMA
macro-cell in the uplink. Motivated by the superior performance of new
waveforms with increased spectral localization in the presence of frequency and
time misalignments, we compare the system-level performance of a set-up for
when D2D pairs use either OFDM or FBMC/OQAM. We first demonstrate that
inter-D2D interference, resulting from misaligned communications, plays a
significant role in clustered D2D topologies. We then demonstrate that the
resource allocation procedure can be simplified when D2D pairs use FBMC/OQAM,
since the high spectral localization of FBMC/OQAM results in negligible
inter-D2D interference. Specifically, we identify that FBMC/OQAM is best suited
to scenarios consisting of small, densely populated D2D clusters located near
the encompassing cell's edge.
|
[{'version': 'v1', 'created': 'Mon, 29 Aug 2016 08:50:19 GMT'}]
|
2016-08-30
|
[array(['Sexton', 'Conor', ''], dtype=object)
array(['Bodinier', 'Quentin', ''], dtype=object)
array(['Farhang', 'Arman', ''], dtype=object)
array(['Marchetti', 'Nicola', ''], dtype=object)
array(['Bader', 'Faouzi', ''], dtype=object)
array(['DaSilva', 'Luiz A.', ''], dtype=object)]
|
17,890 |
2301.08241
|
Yifan Jia
|
Yifan Jia, Angela Capel
|
A generic quantum Wielandt's inequality
|
10 pages, 4 figures
| null | null | null |
quant-ph math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we provide a generic version of quantum Wielandt's inequality,
which gives an optimal upper bound on the minimal length $k$ such that
length-$k$ products of elements in a generating system span $M_n(\mathbb{C})$
with probability one. We show that $k$ generically is of order $\Theta(\log
n)$, as opposed to the general case, in which the best bound to the date is
$O(n^2 \log n)$. Our result implies a new bound on the primitivity index of a
random quantum channel. Furthermore, we conclude that almost any
translation-invariant (with periodic boundary conditions) matrix product state
with length of order $\Omega( \log n )$ is the unique ground state of a local
Hamiltonian. We observe similar characteristics for matrix Lie algebras and
provide numerical results for random Lie-generating systems.
|
[{'version': 'v1', 'created': 'Thu, 19 Jan 2023 18:57:32 GMT'}]
|
2023-01-20
|
[array(['Jia', 'Yifan', ''], dtype=object)
array(['Capel', 'Angela', ''], dtype=object)]
|
17,891 |
1604.04766
|
Anthony Labarre
|
Simona Grusea and Anthony Labarre
|
Asymptotic normality and combinatorial aspects of the prefix exchange
distance distribution
|
To appear in Advances in Applied Mathematics
| null |
10.1016/j.aam.2016.04.002
| null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The prefix exchange distance of a permutation is the minimum number of
exchanges involving the leftmost element that sorts the permutation. We give
new combinatorial proofs of known results on the distribution of the prefix
exchange distance for a random uniform permutation. We also obtain expressions
for the mean and the variance of this distribution, and finally, we show that
the normalised prefix exchange distribution converges in distribution to the
standard normal distribution.
|
[{'version': 'v1', 'created': 'Sat, 16 Apr 2016 15:30:56 GMT'}]
|
2022-08-29
|
[array(['Grusea', 'Simona', ''], dtype=object)
array(['Labarre', 'Anthony', ''], dtype=object)]
|
17,892 |
1004.2220
|
Keisuke Hatada
|
Keisuke Hatada, Kuniko Hayakawa, Fabrizio Palumbo
|
Spin-Orbit Locking and Scissors Modes in rare earth crystals with
uniaxial symmetry
|
8 pages, 3 figures
| null | null | null |
cond-mat.other cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A recent experiment has questioned the standard relative value of spin-orbit
and crystal-field strengths in rare-earth $4f$ electron systems, according to
which the first should be one order of magnitude larger that the second. We
find it difficult to reconcile the standard values of crystal field strength
with the Single Ion Model of magnetic anisotropy. If in rare-earth systems the
spin-orbit force is much larger than the crystal field, however, spin and orbit
of $4f$ electrons should be locked to each other. For rare earths with
non-vanishing spin, an applied magnetic field should rotate both spin and
charge density profile. We suggest experiments to investigate the possible
occurrence of such Spin-Orbit Locking, thus making a test of the standard
picture, by studying the Scissors Modes in such systems.
|
[{'version': 'v1', 'created': 'Tue, 13 Apr 2010 15:51:43 GMT'}
{'version': 'v2', 'created': 'Sat, 21 May 2011 10:32:58 GMT'}]
|
2011-05-24
|
[array(['Hatada', 'Keisuke', ''], dtype=object)
array(['Hayakawa', 'Kuniko', ''], dtype=object)
array(['Palumbo', 'Fabrizio', ''], dtype=object)]
|
17,893 |
1602.06652
|
Jean-Marc Valin
|
Jean-Marc Valin
|
Auditory System for a Mobile Robot
|
120 pages, PhD thesis, University of Sherbrooke, 2005
| null | null | null |
cs.RO cs.SD
|
http://creativecommons.org/licenses/by/4.0/
|
In this thesis, we propose an artificial auditory system that gives a robot
the ability to locate and track sounds, as well as to separate simultaneous
sound sources and recognising simultaneous speech. We demonstrate that it is
possible to implement these capabilities using an array of microphones, without
trying to imitate the human auditory system. The sound source localisation and
tracking algorithm uses a steered beamformer to locate sources, which are then
tracked using a multi-source particle filter. Separation of simultaneous sound
sources is achieved using a variant of the Geometric Source Separation (GSS)
algorithm, combined with a multi-source post-filter that further reduces noise,
interference and reverberation. Speech recognition is performed on separated
sources, either directly or by using Missing Feature Theory (MFT) to estimate
the reliability of the speech features.
The results obtained show that it is possible to track up to four
simultaneous sound sources, even in noisy and reverberant environments.
Real-time control of the robot following a sound source is also demonstrated.
The sound source separation approach we propose is able to achieve a 13.7 dB
improvement in signal-to-noise ratio compared to a single microphone when three
speakers are present. In these conditions, the system demonstrates more than
80% accuracy on digit recognition, higher than most human listeners could
obtain in our small case study when recognising only one of these sources. All
these new capabilities will allow humans to interact more naturally with a
mobile robot in real life settings.
|
[{'version': 'v1', 'created': 'Mon, 22 Feb 2016 05:26:40 GMT'}]
|
2016-02-23
|
[array(['Valin', 'Jean-Marc', ''], dtype=object)]
|
17,894 |
1005.2055
|
C. Hanhart
|
Feng-Kun Guo, Johann Haidenbauer, Christoph Hanhart, and Ulf-G.
Mei{\ss}ner
|
Reconciling the X(4630) with the Y(4660)
|
9 pages
|
Phys.Rev.D82:094008,2010
|
10.1103/PhysRevD.82.094008
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Belle Collaboration observed an enhancement called X(4630) in the
Lambda_c^+ Lambda_c^- mass distribution using initial state radiation. We
demonstrate that the enhancement could be consistent with the psi'f_0(980)
molecular picture of the Y(4660) taking into account the Lambda_c^+ Lambda_c^-
final state interaction. To test the hypothesis that the X(4630) and Y(4660)
are the same molecular state, we give predictions for its spin partner, the
eta_c'f_0(980) molecule. High statistic measurements of the B decays into the K
Lambda_c^+ Lambda_c^- and K eta_c' pi^+ pi^- are strongly recommended.
|
[{'version': 'v1', 'created': 'Wed, 12 May 2010 11:27:50 GMT'}]
|
2015-03-17
|
[array(['Guo', 'Feng-Kun', ''], dtype=object)
array(['Haidenbauer', 'Johann', ''], dtype=object)
array(['Hanhart', 'Christoph', ''], dtype=object)
array(['Meißner', 'Ulf-G.', ''], dtype=object)]
|
17,895 |
1810.12926
|
Peter Maksym
|
W. Peter Maksym (1), Giuseppina Fabbiano (1), Martin Elvis (1),
Margarita Karovska (1), Alessandro Paggi (1, 2, 3 and 4), John Raymond (1),
Junfeng Wang (5), Thaisa Storchi-Bergmann (6), Guido Risaliti (7) ((1)
Harvard-Smithsonian Center for Astrophysics, (2) Universit\`a degli Studi di
Torino, (3) Istituto Nazionale di Fisica Nucleare, (4) INAF-Osservatorio
Astrofisico di Torino, (5) Xiamen University, (6) Universidade Federal do Rio
Grande do Sul, (7) INAF - Arcetri Astrophysical Observatory)
|
CHEERS Results from NGC 3393, III: Chandra X-ray Spectroscopy of the
Narrow Line Region
|
26 pages, 11 figures, 33 images, 6 tables. Part 3 of a series (Part 1
was: 2016, ApJ, 829, 46; Part 2 was: 2017, ApJ, 844, 69). Submitted to ApJ
| null |
10.3847/1538-4357/aaf4f5
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present spatially resolved Chandra narrow-band imaging and imaging
spectroscopy of NGC 3393. This galaxy hosts a Compton-thick Seyfert 2 AGN with
sub-kpc bipolar outflows that are strongly interacting with the circumnuclear
gas. We identify narrow-band excess emission associated with the Ne IX 0.905
keV transition (with likely contributions due to intermediate-state iron
emission) that points to strong shocks driven by AGN feedback. Imaging
spectroscopy resolves outflow-ISM interaction sites and the surrounding ISM at
~100 pc scales, and suggests the presence of a hot AGN wind above the plane at
radii beyond the shock sites. The cross-cone shows evidence for reprocessing of
photoionization which has passed through gaps in the torus, and also for
collisionally excited plasma which may be powered by a shock-confined
equatorial outflow. Deep X-ray observations at sub-arcsecond resolution (such
as may be performed very efficiently by Lynx, which would also energetically
resolve the complex line emission) are necessary to eliminate model
degeneracies and reduce uncertainties in local feedback properties.
|
[{'version': 'v1', 'created': 'Tue, 30 Oct 2018 18:00:09 GMT'}]
|
2019-02-20
|
[array(['Maksym', 'W. Peter', '', '1, 2, 3 and 4'], dtype=object)
array(['Fabbiano', 'Giuseppina', '', '1, 2, 3 and 4'], dtype=object)
array(['Elvis', 'Martin', '', '1, 2, 3 and 4'], dtype=object)
array(['Karovska', 'Margarita', '', '1, 2, 3 and 4'], dtype=object)
array(['Paggi', 'Alessandro', '', '1, 2, 3 and 4'], dtype=object)
array(['Raymond', 'John', ''], dtype=object)
array(['Wang', 'Junfeng', ''], dtype=object)
array(['Storchi-Bergmann', 'Thaisa', ''], dtype=object)
array(['Risaliti', 'Guido', ''], dtype=object)]
|
17,896 |
cond-mat/9902007
|
Norihiro Muramoto
|
Norihiro Muramoto, Minoru Takahashi
|
Integrable Magnetic Model of Two Chains Coupled by Four-Body
Interactions
|
7 pages, LaTeX, to be published in J. Phys. Soc. Jpn., rederived the
model
| null |
10.1143/JPSJ.68.2098
| null |
cond-mat.stat-mech
| null |
An exact solution for an XXZ chain with four-body interactions is obtained
and its phase diagram is determined. The model can be reduced to two chains
coupled by four-body interactions, and it is shown that the ground state of the
two-chain model is magnetized in part. Furthermore, a twisted four-body
correlation function of the anti-ferromagnetic Heisenberg chain is obtained.
|
[{'version': 'v1', 'created': 'Mon, 1 Feb 1999 06:32:14 GMT'}
{'version': 'v2', 'created': 'Fri, 12 Mar 1999 16:16:15 GMT'}]
|
2009-10-31
|
[array(['Muramoto', 'Norihiro', ''], dtype=object)
array(['Takahashi', 'Minoru', ''], dtype=object)]
|
17,897 |
2305.11442
|
Chaoqun Liu
|
Chaoqun Liu, Wenxuan Zhang, Guizhen Chen, Xiaobao Wu, Anh Tuan Luu,
Chip Hong Chang, Lidong Bing
|
Zero-Shot Text Classification via Self-Supervised Tuning
|
Accepted to the Findings of ACL 2023
| null | null | null |
cs.CL cs.AI cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Existing solutions to zero-shot text classification either conduct prompting
with pre-trained language models, which is sensitive to the choices of
templates, or rely on large-scale annotated data of relevant tasks for
meta-tuning. In this work, we propose a new paradigm based on self-supervised
learning to solve zero-shot text classification tasks by tuning the language
models with unlabeled data, called self-supervised tuning. By exploring the
inherent structure of free texts, we propose a new learning objective called
first sentence prediction to bridge the gap between unlabeled data and text
classification tasks. After tuning the model to learn to predict the first
sentence in a paragraph based on the rest, the model is able to conduct
zero-shot inference on unseen tasks such as topic classification and sentiment
analysis. Experimental results show that our model outperforms the
state-of-the-art baselines on 7 out of 10 tasks. Moreover, the analysis reveals
that our model is less sensitive to the prompt design. Our code and pre-trained
models are publicly available at https://github.com/DAMO-NLP-SG/SSTuning .
|
[{'version': 'v1', 'created': 'Fri, 19 May 2023 05:47:33 GMT'}
{'version': 'v2', 'created': 'Thu, 25 May 2023 06:10:04 GMT'}]
|
2023-05-26
|
[array(['Liu', 'Chaoqun', ''], dtype=object)
array(['Zhang', 'Wenxuan', ''], dtype=object)
array(['Chen', 'Guizhen', ''], dtype=object)
array(['Wu', 'Xiaobao', ''], dtype=object)
array(['Luu', 'Anh Tuan', ''], dtype=object)
array(['Chang', 'Chip Hong', ''], dtype=object)
array(['Bing', 'Lidong', ''], dtype=object)]
|
17,898 |
math/0006115
|
J. Scott Carter
|
J. Scott Carter (South Alabama), Seiichi Kamada (Osaka City), and
Masahico Saito (south Florida)
|
Geometric Interpretations of Quandle Homology
|
27 Figures 35 pages
| null | null | null |
math.GT math.AT
| null |
Geometric representations of cycles in quandle homology theory are given in
terms of colored knot diagrams. Abstract knot diagrams are generalized to
diagrams with exceptional points which, when colored, correspond to degenerate
cycles. Bounding chains are realized, and used to obtain equivalence moves for
homologous cycles. The methods are applied to prove that boundary homomorphisms
in a homology exact sequence vanish.
|
[{'version': 'v1', 'created': 'Fri, 16 Jun 2000 15:01:58 GMT'}]
|
2007-05-23
|
[array(['Carter', 'J. Scott', '', 'South Alabama'], dtype=object)
array(['Kamada', 'Seiichi', '', 'Osaka City'], dtype=object)
array(['Saito', 'Masahico', '', 'south Florida'], dtype=object)]
|
17,899 |
2304.04118
|
Muskan Garg
|
Muskan Garg
|
Multi-class Categorization of Reasons behind Mental Disturbance in Long
Texts
| null | null | null | null |
cs.CL cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motivated with recent advances in inferring users' mental state in social
media posts, we identify and formulate the problem of finding causal indicators
behind mental illness in self-reported text. In the past, we witness the
presence of rule-based studies for causal explanation analysis on curated
Facebook data. The investigation on transformer-based model for multi-class
causal categorization in Reddit posts point to a problem of using long-text
which contains as many as 4000 words. Developing end-to-end transformer-based
models subject to the limitation of maximum-length in a given instance. To
handle this problem, we use Longformer and deploy its encoding on
transformer-based classifier. The experimental results show that Longformer
achieves new state-of-the-art results on M-CAMS, a publicly available dataset
with 62\% F1-score. Cause-specific analysis and ablation study prove the
effectiveness of Longformer. We believe our work facilitates causal analysis of
depression and suicide risk on social media data, and shows potential for
application on other mental health conditions.
|
[{'version': 'v1', 'created': 'Sat, 8 Apr 2023 22:44:32 GMT'}]
|
2023-04-11
|
[array(['Garg', 'Muskan', ''], dtype=object)]
|
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