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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
16,800 |
1512.07805
|
Maomeng Su
|
Maomeng Su, Mingxing Zhang, Kang Chen, Yongwei Wu, and Guoliang Li
|
RFP: A Remote Fetching Paradigm for RDMA-Accelerated Systems
|
11 pages, 10 figures; Key Words: RDMA and InfiniBand, Remote Fetching
Paradigm, IOPS, and Small Data
| null | null | null |
cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Remote Direct Memory Access (RDMA) is an efficient way to improve the
performance of traditional client-server systems. Currently, there are two main
design paradigms for RDMA-accelerated systems. The first allows the clients to
directly operate the server's memory and totally bypasses the CPUs at server
side. The second follows the traditional server-reply paradigm, which asks the
server to write results back to the clients. However, the first method has to
expose server's memory and needs tremendous re-design of upper-layer software,
which is complex, unsafe, error-prone, and inefficient. The second cannot
achieve high input/output operations per second (IOPS), because it employs
out-bound RDMA-write at server side which is not efficient.
We find that the performance of out-bound RDMA-write and in-bound RDMA-read
is asymmetric and the latter is 5 times faster than the former. Based on this
observation, we propose a novel design paradigm named Remote Fetching Paradigm
(RFP). In RFP, the server is still responsible for processing requests from the
clients. However, counter-intuitively, instead of sending results back to the
clients through out-bound RDMA-write, the server only writes the results in
local memory buffers, and the clients use in-bound RDMA-read to remotely fetch
these results. Since in-bound RDMA-read achieves much higher IOPS than
out-bound RDMA-write, our model is able to bring higher performance than the
traditional models.
In order to prove the effectiveness of RFP, we design and implement an
RDMA-accelerated in-memory key-value store following the RFP model. To further
improve the IOPS, we propose an optimization mechanism that combines status
checking and result fetching. Experiment results show that RFP can improve the
IOPS by 160%~310% against state-of-the-art models for in-memory key-value
stores.
|
[{'version': 'v1', 'created': 'Thu, 24 Dec 2015 12:49:43 GMT'}]
|
2015-12-25
|
[array(['Su', 'Maomeng', ''], dtype=object)
array(['Zhang', 'Mingxing', ''], dtype=object)
array(['Chen', 'Kang', ''], dtype=object)
array(['Wu', 'Yongwei', ''], dtype=object)
array(['Li', 'Guoliang', ''], dtype=object)]
|
16,801 |
1907.03132
|
Zehui Zhou
|
Bangti Jin, Zehui Zhou and Jun Zou
|
On the Convergence of Stochastic Gradient Descent for Nonlinear
Ill-Posed Problems
| null | null | null | null |
math.OC cs.NA math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we analyze the regularizing property of the stochastic gradient
descent for the efficient numerical solution of a class of nonlinear ill-posed
inverse problems in Hilbert spaces. At each step of the iteration, the method
randomly chooses one equation from the nonlinear system to obtain an unbiased
stochastic estimate of the gradient, and then performs a descent step with the
estimated gradient. It is a randomized version of the classical Landweber
method for nonlinear inverse problems, and it is highly scalable to the problem
size and holds significant potentials for solving large-scale inverse problems.
Under the canonical tangential cone condition, we prove the regularizing
property for a priori stopping rules, and then establish the convergence rates
under suitable sourcewise condition and range invariance condition.
|
[{'version': 'v1', 'created': 'Sat, 6 Jul 2019 14:30:26 GMT'}]
|
2019-07-09
|
[array(['Jin', 'Bangti', ''], dtype=object)
array(['Zhou', 'Zehui', ''], dtype=object)
array(['Zou', 'Jun', ''], dtype=object)]
|
16,802 |
2007.10092
|
Zhe Li
|
Zhe Li, Lianwen Jin, Songxuan Lai, Yecheng Zhu
|
Improving Attention-Based Handwritten Mathematical Expression
Recognition with Scale Augmentation and Drop Attention
|
Accepted to appear in ICFHR 2020
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Handwritten mathematical expression recognition (HMER) is an important
research direction in handwriting recognition. The performance of HMER suffers
from the two-dimensional structure of mathematical expressions (MEs). To
address this issue, in this paper, we propose a high-performance HMER model
with scale augmentation and drop attention. Specifically, tackling ME with
unstable scale in both horizontal and vertical directions, scale augmentation
improves the performance of the model on MEs of various scales. An
attention-based encoder-decoder network is used for extracting features and
generating predictions. In addition, drop attention is proposed to further
improve performance when the attention distribution of the decoder is not
precise. Compared with previous methods, our method achieves state-of-the-art
performance on two public datasets of CROHME 2014 and CROHME 2016.
|
[{'version': 'v1', 'created': 'Mon, 20 Jul 2020 13:35:09 GMT'}]
|
2020-07-21
|
[array(['Li', 'Zhe', ''], dtype=object)
array(['Jin', 'Lianwen', ''], dtype=object)
array(['Lai', 'Songxuan', ''], dtype=object)
array(['Zhu', 'Yecheng', ''], dtype=object)]
|
16,803 |
1312.5113
|
Roberto Caciuffo
|
R. Caciuffo, P. Santini, S. Carretta, G. Amoretti, A. Hiess, N.
Magnani, L.-P. Regnault, G. H. Lander
|
Multipolar, magnetic and vibrational lattice dynamics in the low
temperature phase of uranium dioxide
| null |
Physical Review B 84, 104409 (2011)
|
10.1103/PhysRevB.84.104409
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the results of inelastic neutron scattering experiments performed
with triple-axis spectrometers to investigate the low-temperature collective
dynamics in the ordered phase of uranium dioxide. The results are in excellent
agreement with the predictions of mean-field RPA calculations emphasizing the
importance of multipolar superexchange interactions. By comparing neutron
scattering intensities in different polarization channels and at equivalent
points in different Brillouin zones, we show the mixed
magneto-vibrational-quadrupolar character of the observed excitations. The high
energy resolution afforded by the cold triple-axis spectrometer allowed us to
study in detail the magnon-phonon interaction giving rise to avoided crossings
along the $[00\xi]$ reciprocal space direction.
|
[{'version': 'v1', 'created': 'Wed, 18 Dec 2013 12:34:43 GMT'}]
|
2013-12-19
|
[array(['Caciuffo', 'R.', ''], dtype=object)
array(['Santini', 'P.', ''], dtype=object)
array(['Carretta', 'S.', ''], dtype=object)
array(['Amoretti', 'G.', ''], dtype=object)
array(['Hiess', 'A.', ''], dtype=object)
array(['Magnani', 'N.', ''], dtype=object)
array(['Regnault', 'L. -P.', ''], dtype=object)
array(['Lander', 'G. H.', ''], dtype=object)]
|
16,804 |
1409.5009
|
Ming Yuan
|
Luwan Zhang, Grace Wahba and Ming Yuan
|
Distance Shrinkage and Euclidean Embedding via Regularized Kernel
Estimation
| null | null | null | null |
stat.ML math.ST stat.ME stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Although recovering an Euclidean distance matrix from noisy observations is a
common problem in practice, how well this could be done remains largely
unknown. To fill in this void, we study a simple distance matrix estimate based
upon the so-called regularized kernel estimate. We show that such an estimate
can be characterized as simply applying a constant amount of shrinkage to all
observed pairwise distances. This fact allows us to establish risk bounds for
the estimate implying that the true distances can be estimated consistently in
an average sense as the number of objects increases. In addition, such a
characterization suggests an efficient algorithm to compute the distance matrix
estimator, as an alternative to the usual second order cone programming known
not to scale well for large problems. Numerical experiments and an application
in visualizing the diversity of Vpu protein sequences from a recent HIV-1 study
further demonstrate the practical merits of the proposed method.
|
[{'version': 'v1', 'created': 'Wed, 17 Sep 2014 14:42:28 GMT'}]
|
2014-09-18
|
[array(['Zhang', 'Luwan', ''], dtype=object)
array(['Wahba', 'Grace', ''], dtype=object)
array(['Yuan', 'Ming', ''], dtype=object)]
|
16,805 |
2104.07562
|
Ariel Salort
|
Ariel M. Salort
|
Lower bounds for Orlicz eigenvalues
|
21 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article we consider the following weighted nonlinear eigenvalue
problem for the $g-$Laplacian $$ -\mathop{\text{ div}}\left( g(|\nabla
u|)\frac{\nabla u}{|\nabla u|}\right) = \lambda w(x) h(|u|)\frac{u}{|u|} \quad
\text{ in }\Omega\subset \mathbb{R}^n, n\geq 1 $$ with Dirichlet boundary
conditions. Here $w$ is a suitable weight and $g=G'$ and $h=H'$ are
appropriated Young functions satisfying the so called $\Delta'$ condition,
which includes for instance logarithmic perturbation of powers and different
power behaviors near zero and infinity. We prove several properties on its
spectrum, being our main goal to obtain lower bounds of eigenvalues in terms of
$G$, $H$, $w$ and the normalization $\mu$ of the corresponding eigenfunctions.
We introduce some new strategies to obtain results that generalize several
inequalities from the literature of $p-$Laplacian type eigenvalues.
|
[{'version': 'v1', 'created': 'Thu, 15 Apr 2021 16:18:23 GMT'}]
|
2021-04-16
|
[array(['Salort', 'Ariel M.', ''], dtype=object)]
|
16,806 |
2301.05416
|
Xiuqing Li
|
Xiuqing Li, Xian'an Jin, Chao Shi, Ruiling Zheng
|
Two spectral extremal results for graphs with given order and rank
|
26 pages, 3 figures
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The spectral radius and rank of a graph are defined to be the spectral radius
and rank of its adjacency matrix, respectively. It is an important problem in
spectral extremal graph theory to determine the extremal graph that has the
maximum or minimum spectral radius over certain families of graphs. Monsalve
and Rada [Extremal spectral radius of graphs with rank 4, Linear Algebra Appl.
609 (2021) 1-11] obtained the extremal graphs with maximum and minimum spectral
radii among all graphs with order n and rank 4. In this paper, we first
determine the extremal graph which attains the maximum spectral radius among
all graphs with any given order n and rank r, and further determine the
extremal graph which attains the minimum spectral radius among all graphs with
order n and rank 5.
|
[{'version': 'v1', 'created': 'Fri, 13 Jan 2023 07:15:59 GMT'}]
|
2023-01-16
|
[array(['Li', 'Xiuqing', ''], dtype=object)
array(['Jin', "Xian'an", ''], dtype=object)
array(['Shi', 'Chao', ''], dtype=object)
array(['Zheng', 'Ruiling', ''], dtype=object)]
|
16,807 |
1609.08118
|
John Schotland
|
Francis J Chung and John C Schotland
|
Inverse Transport and Acousto-Optic Imaging
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the inverse problem of recovering the optical properties of a
highly-scattering medium from acousto-optic measurements. Using such
measurements, we show that the scattering and absorption coefficients of the
radiative transport equation can be reconstructed with Lipschitz stability by
means of algebraic inversion formulas.
|
[{'version': 'v1', 'created': 'Mon, 26 Sep 2016 18:58:24 GMT'}]
|
2016-09-27
|
[array(['Chung', 'Francis J', ''], dtype=object)
array(['Schotland', 'John C', ''], dtype=object)]
|
16,808 |
astro-ph/9410001
|
Peter Dunsby
|
G.F.R. Ellis and P.K.S. Dunsby
|
Newtonian Evolution of the Weyl Tensor
|
submitted to Ap. J., 12 pages, Latex
|
Astrophys.J. 479 (1997) 97
|
10.1086/303839
| null |
astro-ph gr-qc
| null |
In an interesting recent paper on the growth of inhomogeneity through the
effect of gravity [1], Bertschinger and Hamilton derive equations for the
electric and magnetic parts of the Weyl tensor for cold dust for both General
Relativity and Newtonian theory. Their conclusion is that both in General
Relativity and in Newtonian theory, in general the magnetic part of the Weyl
tensor does not vanish, implying that the Lagrangian evolution of the fluid is
not local. We show here that the `Newtonian' theory discussed by them is in
fact not Newtonian theory {\it per se}, but rather a plausible relativistic
generalisation of Newtonian theory. Newtonian cosmology itself is highly
non-local irrespective of the behaviour of the magnetic part of the Weyl
tensor; in this respect the Bertschinger-Hamilton generalisation is a better
theory.
|
[{'version': 'v1', 'created': 'Mon, 3 Oct 1994 13:06:08 GMT'}]
|
2009-10-22
|
[array(['Ellis', 'G. F. R.', ''], dtype=object)
array(['Dunsby', 'P. K. S.', ''], dtype=object)]
|
16,809 |
2205.08950
|
Ankita Phutela
|
Ankita Phutela, Preeti Bhumla, Manjari Jain and Saswata Bhattacharya
|
Exploring strong and weak topological states on isostructural
substitutions in TlBiSe2
| null | null | null | null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Topological Insulators (TIs) are unique materials where insulating bulk hosts
linearly dispersing surface states protected by the Time-Reversal Symmetry
(TRS). These states lead to dissipationless current flow, which makes this
class of materials highly promising for spintronic applications. Here, we
predict new TIs via high-throughput screening by employing state-of-the-art
first-principles based methodologies, viz., Density Functional Theory (DFT) and
many-body perturbation theory (G0W0) combined with Spin-Orbit Coupling (SOC).
For this, we take a well-known 3D TI, TlBiSe2 and perform complete substitution
with suitable materials at different sites to check if the obtained
isostructural materials exhibit topological properties. Subsequently, we scan
these materials based on SOC-induced parity inversion at Time-Reversal
Invariant Momenta (TRIM). Later, to confirm the topological nature of selected
materials, we plot their surface states along with calculation of Z2
invariants. Our results show that GaBiSe2 is a Strong Topological Insulator
(STI). Besides, we report six Weak Topological Insulators (WTIs) viz. PbBiSe2,
SnBiSe2, SbBiSe2, Bi2Se2, TlSnSe2 and PbSbSe2. We have further verified that
all the reported TIs are dynamically stable showing all real phonon modes of
vibration.
|
[{'version': 'v1', 'created': 'Wed, 18 May 2022 14:25:53 GMT'}]
|
2022-05-19
|
[array(['Phutela', 'Ankita', ''], dtype=object)
array(['Bhumla', 'Preeti', ''], dtype=object)
array(['Jain', 'Manjari', ''], dtype=object)
array(['Bhattacharya', 'Saswata', ''], dtype=object)]
|
16,810 |
cond-mat/0208166
|
Deb Shankar Ray
|
Dhruba Banerjee, Suman Kumar Banik, Bidhan Chandra Bag and Deb Shankar
Ray
|
Quantum Kramers' equation for energy diffusion and barrier crossing
dynamics in the low friction regime
|
26 pages, RevTex
|
Phys. Rev. E 66 (2002) 051105
|
10.1103/PhysRevE.66.051105
| null |
cond-mat.stat-mech physics.chem-ph quant-ph
| null |
Based on a true phase space probability distribution function and an ensemble
averaging procedure we have recently developed [Phys. Rev. E 65, 021109 (2002)]
a non-Markovian quantum Kramers' equation to derive the quantum rate
coefficient for barrier crossing due to thermal activation and tunneling in the
intermediate to strong friction regime. We complement and extend this approach
to weak friction regime to derive quantum Kramers' equation in energy space and
the rate of decay from a metastable well. The theory is valid for arbitrary
temperature and noise correlation. We show that depending on the nature of the
potential there may be a net reduction of the total quantum rate below its
corresponding classical value which is in conformity with earlier observation.
The method is independent of path integral approaches and takes care of quantum
effects to all orders.
|
[{'version': 'v1', 'created': 'Thu, 8 Aug 2002 12:12:41 GMT'}]
|
2009-11-07
|
[array(['Banerjee', 'Dhruba', ''], dtype=object)
array(['Banik', 'Suman Kumar', ''], dtype=object)
array(['Bag', 'Bidhan Chandra', ''], dtype=object)
array(['Ray', 'Deb Shankar', ''], dtype=object)]
|
16,811 |
0809.3807
|
Joel Hartman
|
J.D. Hartman, B.S. Gaudi, M.J. Holman, B.A. McLeod, K.Z. Stanek, J.A.
Barranco, M.H. Pinsonneault, S. Meibom, J.S. Kalirai
|
Deep MMT Transit Survey of the Open Cluster M37 IV: Limit on the
Fraction of Stars With Planets as Small as 0.3 R_J
|
61 pages, 19 figures, 5 tables, replaced with the version accepted
for publication in ApJ
| null |
10.1088/0004-637X/695/1/336
| null |
astro-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the results of a deep (15 ~< r ~< 23), 20 night survey for
transiting planets in the intermediate age open cluster M37 (NGC 2099) using
the Megacam wide-field mosaic CCD camera on the 6.5m MMT. We do not detect any
transiting planets among the ~1450 observed cluster members. We do, however,
identify a ~ 1 R_J candidate planet transiting a ~ 0.8 Msun Galactic field star
with a period of 0.77 days. The source is faint (V = 19.85 mag) and has an
expected velocity semi-amplitude of K ~ 220 m/s (M/M_J). We conduct Monte Carlo
transit injection and recovery simulations to calculate the 95% confidence
upper limit on the fraction of cluster members and field stars with planets as
a function of planetary radius and orbital period. Assuming a uniform
logarithmic distribution in orbital period, we find that < 1.1%, < 2.7% and <
8.3% of cluster members have 1.0 R_J planets within Extremely Hot Jupiter (EHJ,
0.4 < T < 1.0 day), Very Hot Jupiter (VHJ, 1.0 < T < 3.0 days) and Hot Jupiter
(HJ, 3.0 < T < 5.0 days) period ranges respectively. For 0.5 R_J planets the
limits are < 3.2%, and < 21% for EHJ and VHJ period ranges, while for 0.35 R_J
planets we can only place an upper limit of < 25% on the EHJ period range. For
a sample of 7814 Galactic field stars, consisting primarily of FGKM dwarfs, we
place 95% upper limits of < 0.3%, < 0.8% and < 2.7% on the fraction of stars
with 1.0 R_J EHJ, VHJ and HJ assuming the candidate planet is not genuine. If
the candidate is genuine, the frequency of ~ 1.0 R_J planets in the EHJ period
range is 0.002% < f_EHJ < 0.5% with 95% confidence. We place limits of < 1.4%,
< 8.8% and < 47% for 0.5 R_J planets, and a limit of < 16% on 0.3 R_J planets
in the EHJ period range. This is the first transit survey to place limits on
the fraction of stars with planets as small as Neptune.
|
[{'version': 'v1', 'created': 'Mon, 22 Sep 2008 20:51:57 GMT'}
{'version': 'v2', 'created': 'Mon, 22 Dec 2008 15:49:39 GMT'}]
|
2009-11-13
|
[array(['Hartman', 'J. D.', ''], dtype=object)
array(['Gaudi', 'B. S.', ''], dtype=object)
array(['Holman', 'M. J.', ''], dtype=object)
array(['McLeod', 'B. A.', ''], dtype=object)
array(['Stanek', 'K. Z.', ''], dtype=object)
array(['Barranco', 'J. A.', ''], dtype=object)
array(['Pinsonneault', 'M. H.', ''], dtype=object)
array(['Meibom', 'S.', ''], dtype=object)
array(['Kalirai', 'J. S.', ''], dtype=object)]
|
16,812 |
1303.1806
|
Ludovic Van Waerbeke
|
Ludovic Van Waerbeke, Jonathan Benjamin, Thomas Erben, Catherine
Heymans, Hendrik Hildebrandt, Henk Hoekstra, Thomas D. Kitching, Yannick
Mellier, Lance Miller, Jean Coupon, Joachim Harnois-D\'eraps, Liping Fu,
Michael J. Hudson, Martin Kilbinger, Konrad Kuijken, Barnaby T.P. Rowe, Tim
Schrabback, Elisabetta Semboloni, Sanaz Vafaei, Edo van Uitert, Malin
Velander
|
CFHTLenS: Mapping the Large Scale Structure with Gravitational Lensing
|
Version accepted by MNRAS
| null |
10.1093/mnras/stt971
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a quantitative analysis of the largest contiguous maps of
projected mass density obtained from gravitational lensing shear. We use data
from the 154 deg2 covered by the Canada-France-Hawaii Telescope Lensing Survey.
Our study is the first attempt to quantitatively characterize the scientific
value of lensing maps, which could serve in the future as a complementary
approach to the study of the dark universe with gravitational lensing. We show
that mass maps contain unique cosmological information beyond that of
traditional two-points statistical analysis techniques. Using a series of
numerical simulations, we first show how, reproducing the CFHTLenS observing
conditions, gravitational lensing inversion provides a reliable estimate of the
projected matter distribution of large scale structure. We validate our
analysis by quantifying the robustness of the maps with various statistical
estimators. We then apply the same process to the CFHTLenS data. We find that
the 2-points correlation function of the projected mass is consistent with the
cosmological analysis performed on the shear correlation function discussed in
the CFHTLenS companion papers. The maps also lead to a significant measurement
of the third order moment of the projected mass, which is in agreement with
analytic predictions, and to a marginal detection of the fourth order moment.
Tests for residual systematics are found to be consistent with zero for the
statistical estimators we used. A new approach for the comparison of the
reconstructed mass map to that predicted from the galaxy distribution reveals
the existence of giant voids in the dark matter maps as large as 3 degrees on
the sky. Our analysis shows that lensing mass maps can be used for new
techniques such as peak statistics and the morphological analysis of the
projected dark matter distribution.
|
[{'version': 'v1', 'created': 'Thu, 7 Mar 2013 20:40:10 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Jun 2013 20:16:47 GMT'}]
|
2015-06-15
|
[array(['Van Waerbeke', 'Ludovic', ''], dtype=object)
array(['Benjamin', 'Jonathan', ''], dtype=object)
array(['Erben', 'Thomas', ''], dtype=object)
array(['Heymans', 'Catherine', ''], dtype=object)
array(['Hildebrandt', 'Hendrik', ''], dtype=object)
array(['Hoekstra', 'Henk', ''], dtype=object)
array(['Kitching', 'Thomas D.', ''], dtype=object)
array(['Mellier', 'Yannick', ''], dtype=object)
array(['Miller', 'Lance', ''], dtype=object)
array(['Coupon', 'Jean', ''], dtype=object)
array(['Harnois-Déraps', 'Joachim', ''], dtype=object)
array(['Fu', 'Liping', ''], dtype=object)
array(['Hudson', 'Michael J.', ''], dtype=object)
array(['Kilbinger', 'Martin', ''], dtype=object)
array(['Kuijken', 'Konrad', ''], dtype=object)
array(['Rowe', 'Barnaby T. P.', ''], dtype=object)
array(['Schrabback', 'Tim', ''], dtype=object)
array(['Semboloni', 'Elisabetta', ''], dtype=object)
array(['Vafaei', 'Sanaz', ''], dtype=object)
array(['van Uitert', 'Edo', ''], dtype=object)
array(['Velander', 'Malin', ''], dtype=object)]
|
16,813 |
cond-mat/0410121
|
Ying Jiang
|
Ying Jiang
|
Magnetic monopoles in a charged two-condensate Bose-Einstein system
|
4 pages
|
Phys.Rev. B70 (2004) 012501
|
10.1103/PhysRevB.70.012501
| null |
cond-mat.other hep-th
| null |
We propose that a charged two-condensate Bose system possesses point-like
topological defects which can be interpreted as magnetic monopoles. By making
use of the $\phi$-mapping theory, the topological charges of these magnetic
monopoles can be expressed in terms of the Hopf indices and Brouwer degree of
the $\phi$-mapping.
|
[{'version': 'v1', 'created': 'Tue, 5 Oct 2004 14:48:55 GMT'}]
|
2009-11-10
|
[array(['Jiang', 'Ying', ''], dtype=object)]
|
16,814 |
1906.06926
|
Dave Kooijman
|
Dave Kooijman, Angela P. Schoellig, Duarte J. Antunes
|
Trajectory Tracking for Quadrotors with Attitude Control on
$\mathcal{S}^2 \times \mathcal{S}^1$
| null | null | null | null |
cs.RO cs.SY eess.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The control of a quadrotor is typically split into two subsequent problems:
finding desired accelerations to control its position, and controlling its
attitude and the total thrust to track these accelerations and to track a yaw
angle reference. While the thrust vector, generating accelerations, and the
angle of rotation about the thrust vector, determining the yaw angle, can be
controlled independently, most attitude control strategies in the literature,
relying on representations in terms of quaternions, rotation matrices or Euler
angles, result in an unnecessary coupling between the control of the thrust
vector and of the angle about this vector. This leads, for instance, to
undesired position tracking errors due to yaw tracking errors. In this paper we
propose to tackle the attitude control problem using an attitude representation
in the Cartesian product of the 2-sphere and the 1-sphere, denoted by
$\mathcal{S}^2\times \mathcal{S}^1$. We propose a non-linear tracking control
law on $\mathcal{S}^2\times \mathcal{S}^1$ that decouples the control of the
thrust vector and of the angle of rotation about the thrust vector, and
guarantees almost global asymptotic stability. Simulation results highlight the
advantages of the proposed approach over previous approaches.
|
[{'version': 'v1', 'created': 'Mon, 17 Jun 2019 09:59:53 GMT'}]
|
2019-06-18
|
[array(['Kooijman', 'Dave', ''], dtype=object)
array(['Schoellig', 'Angela P.', ''], dtype=object)
array(['Antunes', 'Duarte J.', ''], dtype=object)]
|
16,815 |
2203.05618
|
Kaan Gokcesu
|
Kaan Gokcesu, Hakan Gokcesu
|
A Linearithmic Time Locally Optimal Algorithm for the Multiway Number
Partition Optimization
| null | null | null | null |
cs.DS cs.LG math.CO math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the problem of multiway number partition optimization, which has a
myriad of applications in the decision, learning and optimization literature.
Even though the original multiway partitioning problem is NP-hard and requires
exponential time complexity algorithms; we formulate an easier optimization
problem, where our goal is to find a solution that is locally optimal. We
propose a linearithmic time complexity $O(N\log N)$ algorithm that can produce
such a locally optimal solution. Our method is robust against the input and
requires neither positive nor integer inputs.
|
[{'version': 'v1', 'created': 'Thu, 10 Mar 2022 20:07:21 GMT'}]
|
2022-03-14
|
[array(['Gokcesu', 'Kaan', ''], dtype=object)
array(['Gokcesu', 'Hakan', ''], dtype=object)]
|
16,816 |
0908.0016
|
Antonio Soares de Castro
|
T.R. Cardoso, L.B. Castro, A.S. de Castro
|
Effects due to a scalar coupling on the particle-antiparticle production
in the Duffin-Kemmer-Petiau theory
| null |
Int.J.Theor.Phys.49:10-17,2010
|
10.1007/s10773-009-0172-1
| null |
hep-th quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Duffin-Kemmer-Petiau formalism with vector and scalar potentials is used
to point out a few misconceptions diffused in the literature. It is explicitly
shown that the scalar coupling makes the DKP formalism not equivalent to the
Klein-Gordon formalism or to the Proca formalism, and that the spin-1 sector of
the DKP theory looks formally like the spin-0 sector. With proper boundary
conditions, scattering of massive bosons in an arbitrary mixed vector-scalar
square step potential is explored in a simple way and effects due to the scalar
coupling on the particle-antiparticle production and localization of bosons are
analyzed in some detail.
|
[{'version': 'v1', 'created': 'Fri, 31 Jul 2009 22:28:39 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Oct 2009 17:39:40 GMT'}]
|
2010-01-07
|
[array(['Cardoso', 'T. R.', ''], dtype=object)
array(['Castro', 'L. B.', ''], dtype=object)
array(['de Castro', 'A. S.', ''], dtype=object)]
|
16,817 |
1109.4619
|
John H. Miller jr
|
J. H. Miller Jr., A. I. Wijesinghe, Z. Tang, and A. M. Guloy
|
Correlated Quantum Transport of Density Wave Electrons
|
9 pages, 4 figures, (5 pages & 3 figures for main article), includes
Supplemental Material with 1 figure. Published version: Physical Review
Letters, vol. 108, p. 036404 (2012)
| null |
10.1103/PhysRevLett.108.036404
| null |
cond-mat.str-el quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently observed Aharonov-Bohm quantum interference of period h/2e in charge
density wave rings strongly suggest that correlated density wave electron
transport is a cooperative quantum phenomenon. The picture discussed here
posits that quantum solitons nucleate and transport current above a Coulomb
blockade threshold field. We propose a field-dependent tunneling matrix element
and use the Schrodinger equation, viewed as an emergent classical equation as
in Feynman's treatment of Josephson tunneling, to compute the evolving
macrostate amplitudes, finding excellent quantitative agreement with voltage
oscillations and current-voltage characteristics in NbSe3. A proposed phase
diagram shows the conditions favoring soliton nucleation versus classical
depinning. (Published in Phys. Rev. Lett. 108, 036404 (2012).)
|
[{'version': 'v1', 'created': 'Wed, 21 Sep 2011 19:32:57 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Nov 2011 00:06:05 GMT'}
{'version': 'v3', 'created': 'Wed, 7 Dec 2011 00:31:55 GMT'}
{'version': 'v4', 'created': 'Mon, 6 Feb 2012 21:39:24 GMT'}]
|
2015-05-30
|
[array(['Miller', 'J. H.', 'Jr.'], dtype=object)
array(['Wijesinghe', 'A. I.', ''], dtype=object)
array(['Tang', 'Z.', ''], dtype=object)
array(['Guloy', 'A. M.', ''], dtype=object)]
|
16,818 |
1111.4707
|
Chien-Hao Liu
|
Chien-Hao Liu and Shing-Tung Yau
|
D0-brane realizations of the resolution of a reduced singular curve
|
9+2 pages
| null | null | null |
math.AG hep-th math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Based on examples from superstring/D-brane theory since the work of Douglas
and Moore on resolution of singularities of a superstring target-space $Y$ via
a D-brane probe, the richness and the complexity of the stack of punctual
D0-branes on a variety, and as a guiding question, we lay down a conjecture
that any resolution $Y^{\prime}\rightarrow Y$ of a variety $Y$ over ${\Bbb C}$
can be factored through an embedding of $Y^{\prime}$ into the stack ${\frak
M}^{0^{A z^f}_{\;p}}_r (Y)$ of punctual D0-branes of rank $r$ on $Y$ for $r\ge
r_0$ in ${\Bbb N}$, where $r_0$ depends on the germ of singularities of $Y$. We
prove that this conjecture holds for the resolution $\rho:
C^{\prime}\rightarrow C$ of a reduced singular curve $C$ over ${\Bbb C}$. In
string-theoretical language, this says that the resolution $C^{\prime}$ of a
singular curve $C$ always arises from an appropriate D0-brane aggregation on
$C$ and that the rank of the Chan-Paton module of the D0-branes involved can be
chosen to be arbitrarily large.
|
[{'version': 'v1', 'created': 'Mon, 21 Nov 2011 00:33:16 GMT'}]
|
2011-11-22
|
[array(['Liu', 'Chien-Hao', ''], dtype=object)
array(['Yau', 'Shing-Tung', ''], dtype=object)]
|
16,819 |
2102.07357
|
Emre Yilmaz
|
Emre Yilmaz, Tianxi Ji, Erman Ayday and Pan Li
|
Genomic Data Sharing under Dependent Local Differential Privacy
| null | null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Privacy-preserving genomic data sharing is prominent to increase the pace of
genomic research, and hence to pave the way towards personalized genomic
medicine. In this paper, we introduce ($\epsilon , T$)-dependent local
differential privacy (LDP) for privacy-preserving sharing of correlated data
and propose a genomic data sharing mechanism under this privacy definition. We
first show that the original definition of LDP is not suitable for genomic data
sharing, and then we propose a new mechanism to share genomic data. The
proposed mechanism considers the correlations in data during data sharing,
eliminates statistically unlikely data values beforehand, and adjusts the
probability distributions for each shared data point accordingly. By doing so,
we show that we can avoid an attacker from inferring the correct values of the
shared data points by utilizing the correlations in the data. By adjusting the
probability distributions of the shared states of each data point, we also
improve the utility of shared data for the data collector. Furthermore, we
develop a greedy algorithm that strategically identifies the processing order
of the shared data points with the aim of maximizing the utility of the shared
data. Considering the interdependent privacy risks while sharing genomic data,
we also analyze the information gain of an attacker about genomes of a donor's
family members by observing perturbed data of the genome donor and we propose a
mechanism to select the privacy budget (i.e., $\epsilon$ parameter of LDP) of
the donor by also considering privacy preferences of her family members. Our
evaluation results on a real-life genomic dataset show the superiority of the
proposed mechanism compared to the randomized response mechanism (a widely used
technique to achieve LDP).
|
[{'version': 'v1', 'created': 'Mon, 15 Feb 2021 06:15:00 GMT'}]
|
2021-02-16
|
[array(['Yilmaz', 'Emre', ''], dtype=object)
array(['Ji', 'Tianxi', ''], dtype=object)
array(['Ayday', 'Erman', ''], dtype=object)
array(['Li', 'Pan', ''], dtype=object)]
|
16,820 |
2004.07136
|
Albert Susanto
|
Albert Susanto, Herman, Tjeng Wawan Cenggoro, Suharjito, Bens
Pardamean
|
Transfer-Learning-Aware Neuro-Evolution for Diseases Detection in Chest
X-Ray Images
| null | null | null | null |
cs.NE
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
The neural network needs excessive costs of time because of the complexity of
architecture when trained on images. Transfer learning and fine-tuning can help
improve time and cost efficiency when training a neural network. Yet, Transfer
learning and fine-tuning needs a lot of experiment to try with. Therefore, a
method to find the best architecture for transfer learning and fine-tuning is
needed. To overcome this problem, neuro-evolution using a genetic algorithm can
be used to find the best architecture for transfer learning. To check the
performance of this study, dataset ChestX-Ray 14 and DenseNet-121 as a base
neural network model are used. This study used the AUC score, differences in
execution time for training, and McNemar's test to the significance test. In
terms of result, this study got a 5% difference in the AUC score, 3 % faster in
terms of execution time, and significance in most of the disease detection.
Finally, this study gives a concrete summary of how neuro-evolution transfer
learning can help in terms of transfer learning and fine-tuning.
|
[{'version': 'v1', 'created': 'Wed, 15 Apr 2020 15:06:30 GMT'}]
|
2020-04-16
|
[array(['Susanto', 'Albert', ''], dtype=object)
array(['Herman', '', ''], dtype=object)
array(['Cenggoro', 'Tjeng Wawan', ''], dtype=object)
array(['Suharjito', '', ''], dtype=object)
array(['Pardamean', 'Bens', ''], dtype=object)]
|
16,821 |
2106.04536
|
\'Etienne Artigau
|
\'Etienne Artigau, Guillaume H\'ebrard, Charles Cadieux, Thomas
Vandal, Neil J. Cook, Ren\'e Doyon, Jonathan Gagn\'e, Claire Moutou, Eder
Martioli, Antonio Frasca, Farbod Jahandar, David Lafreni\`ere, Lison Malo,
Jean-Fran\c{c}ois Donati, Pia Cortes-Zuleta, Isabelle Boisse, Xavier
Delfosse, Andres Carmona, Pascal Fouqu\'e, Julien Morin, Jason Rowe, Giuseppe
Marino, Riccardo Papini, David R. Ciardi, Michael B. Lund, Jorge H. C.
Martins, Stefan Pelletier, Luc Arnold, Fran\c{c}ois Bouchy, Thierry
Forveille, Nuno C. Santos, Xavier Bonfils, Pedro Figueira, Michael Fausnaugh,
George Ricker, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins,
Eric B. Ting, Guillermo Torres, Jo\~ao Gomes da Silva
|
TOI-1278 B: SPIRou unveils a rare Brown Dwarf Companion in Close-In
Orbit around an M dwarf
|
accepted for publication in The Astronomical Journal
| null |
10.3847/1538-3881/ac096d
| null |
astro-ph.SR astro-ph.EP
|
http://creativecommons.org/licenses/by/4.0/
|
We present the discovery of an $18.5\pm0.5$M$_{\rm Jup}$ brown dwarf (BD)
companion to the M0V star TOI-1278. The system was first identified through a
percent-deep transit in TESS photometry; further analysis showed it to be a
grazing transit of a Jupiter-sized object. Radial velocity (RV) follow-up with
the SPIRou near-infrared high-resolution velocimeter and spectropolarimeter in
the framework of the 300-night SPIRou Legacy Survey (SLS) carried out at the
Canada-France-Hawaii Telescope (CFHT) led to the detection of a Keplerian RV
signal with a semi-amplitude of $2306\pm10$ m/s in phase with the 14.5-day
transit period, having a slight but non-zero eccentricity. The
intermediate-mass ratio ($M_\star/M_{\rm{comp}} \sim31$) is unique for having
such a short separation ($0.095\pm0.001$ AU) among known M-dwarf systems.
Interestingly, M dwarf-brown dwarf systems with similar mass ratios exist with
separations of tens to thousands of AUs.
|
[{'version': 'v1', 'created': 'Tue, 8 Jun 2021 17:19:04 GMT'}]
|
2021-09-22
|
[array(['Artigau', 'Étienne', ''], dtype=object)
array(['Hébrard', 'Guillaume', ''], dtype=object)
array(['Cadieux', 'Charles', ''], dtype=object)
array(['Vandal', 'Thomas', ''], dtype=object)
array(['Cook', 'Neil J.', ''], dtype=object)
array(['Doyon', 'René', ''], dtype=object)
array(['Gagné', 'Jonathan', ''], dtype=object)
array(['Moutou', 'Claire', ''], dtype=object)
array(['Martioli', 'Eder', ''], dtype=object)
array(['Frasca', 'Antonio', ''], dtype=object)
array(['Jahandar', 'Farbod', ''], dtype=object)
array(['Lafrenière', 'David', ''], dtype=object)
array(['Malo', 'Lison', ''], dtype=object)
array(['Donati', 'Jean-François', ''], dtype=object)
array(['Cortes-Zuleta', 'Pia', ''], dtype=object)
array(['Boisse', 'Isabelle', ''], dtype=object)
array(['Delfosse', 'Xavier', ''], dtype=object)
array(['Carmona', 'Andres', ''], dtype=object)
array(['Fouqué', 'Pascal', ''], dtype=object)
array(['Morin', 'Julien', ''], dtype=object)
array(['Rowe', 'Jason', ''], dtype=object)
array(['Marino', 'Giuseppe', ''], dtype=object)
array(['Papini', 'Riccardo', ''], dtype=object)
array(['Ciardi', 'David R.', ''], dtype=object)
array(['Lund', 'Michael B.', ''], dtype=object)
array(['Martins', 'Jorge H. C.', ''], dtype=object)
array(['Pelletier', 'Stefan', ''], dtype=object)
array(['Arnold', 'Luc', ''], dtype=object)
array(['Bouchy', 'François', ''], dtype=object)
array(['Forveille', 'Thierry', ''], dtype=object)
array(['Santos', 'Nuno C.', ''], dtype=object)
array(['Bonfils', 'Xavier', ''], dtype=object)
array(['Figueira', 'Pedro', ''], dtype=object)
array(['Fausnaugh', 'Michael', ''], dtype=object)
array(['Ricker', 'George', ''], dtype=object)
array(['Latham', 'David W.', ''], dtype=object)
array(['Seager', 'Sara', ''], dtype=object)
array(['Winn', 'Joshua N.', ''], dtype=object)
array(['Jenkins', 'Jon M.', ''], dtype=object)
array(['Ting', 'Eric B.', ''], dtype=object)
array(['Torres', 'Guillermo', ''], dtype=object)
array(['da Silva', 'João Gomes', ''], dtype=object)]
|
16,822 |
2202.07880
|
Bryan Li
|
Bryan Li, Lara J. Martin, and Chris Callison-Burch
|
$\rm{C {\small IS}}^2$: A Simplified Commonsense Inference Evaluation
for Story Prose
|
Published at the Workshop on Commonsense Representation and Reasoning
(CSRR) @ ACL 2022
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Transformers have been showing near-human performance on a variety of tasks,
but they are not without their limitations. We discuss the issue of conflating
results of transformers that are instructed to do multiple tasks
simultaneously. In particular, we focus on the domain of commonsense reasoning
within story prose, which we call contextual commonsense inference (CCI). We
look at the GLUCOSE (Mostafazadeh et al. 2020) dataset and task for predicting
implicit commonsense inferences between story sentences. Since the GLUCOSE task
simultaneously generates sentences and predicts the CCI relation, there is a
conflation in the results. Is the model really measuring CCI or is its ability
to generate grammatical text carrying the results? In this paper, we introduce
the task contextual commonsense inference in sentence selection ($\rm{C {\small
IS}}^2$), a simplified task that avoids conflation by eliminating language
generation altogether. Our findings emphasize the necessity of future work to
disentangle language generation from the desired NLP tasks at hand.
|
[{'version': 'v1', 'created': 'Wed, 16 Feb 2022 06:14:37 GMT'}
{'version': 'v2', 'created': 'Fri, 27 May 2022 17:51:35 GMT'}
{'version': 'v3', 'created': 'Mon, 30 May 2022 05:54:55 GMT'}
{'version': 'v4', 'created': 'Wed, 19 Oct 2022 21:01:46 GMT'}]
|
2022-10-21
|
[array(['Li', 'Bryan', ''], dtype=object)
array(['Martin', 'Lara J.', ''], dtype=object)
array(['Callison-Burch', 'Chris', ''], dtype=object)]
|
16,823 |
2101.08926
|
Shuai Li
|
Chuankun Li, Shuai Li, Yanbo Gao, Xiang Zhang, Wanqing Li
|
A Two-stream Neural Network for Pose-based Hand Gesture Recognition
| null | null | null | null |
cs.CV cs.LG cs.MM
|
http://creativecommons.org/licenses/by/4.0/
|
Pose based hand gesture recognition has been widely studied in the recent
years. Compared with full body action recognition, hand gesture involves joints
that are more spatially closely distributed with stronger collaboration. This
nature requires a different approach from action recognition to capturing the
complex spatial features. Many gesture categories, such as "Grab" and "Pinch",
have very similar motion or temporal patterns posing a challenge on temporal
processing. To address these challenges, this paper proposes a two-stream
neural network with one stream being a self-attention based graph convolutional
network (SAGCN) extracting the short-term temporal information and hierarchical
spatial information, and the other being a residual-connection enhanced
bidirectional Independently Recurrent Neural Network (RBi-IndRNN) for
extracting long-term temporal information. The self-attention based graph
convolutional network has a dynamic self-attention mechanism to adaptively
exploit the relationships of all hand joints in addition to the fixed topology
and local feature extraction in the GCN. On the other hand, the
residual-connection enhanced Bi-IndRNN extends an IndRNN with the capability of
bidirectional processing for temporal modelling. The two streams are fused
together for recognition. The Dynamic Hand Gesture dataset and First-Person
Hand Action dataset are used to validate its effectiveness, and our method
achieves state-of-the-art performance.
|
[{'version': 'v1', 'created': 'Fri, 22 Jan 2021 03:22:26 GMT'}]
|
2021-01-25
|
[array(['Li', 'Chuankun', ''], dtype=object)
array(['Li', 'Shuai', ''], dtype=object)
array(['Gao', 'Yanbo', ''], dtype=object)
array(['Zhang', 'Xiang', ''], dtype=object)
array(['Li', 'Wanqing', ''], dtype=object)]
|
16,824 |
2010.15240
|
Kaiming Fu
|
Kaiming Fu and Yulu Jin and Zhousheng Chen
|
Test Set Optimization by Machine Learning Algorithms
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Diagnosis results are highly dependent on the volume of test set. To derive
the most efficient test set, we propose several machine learning based methods
to predict the minimum amount of test data that produces relatively accurate
diagnosis. By collecting outputs from failing circuits, the feature matrix and
label vector are generated, which involves the inference information of the
test termination point. Thus we develop a prediction model to fit the data and
determine when to terminate testing. The considered methods include LASSO and
Support Vector Machine(SVM) where the relationship between goals(label) and
predictors(feature matrix) are considered to be linear in LASSO and nonlinear
in SVM. Numerical results show that SVM reaches a diagnosis accuracy of 90.4%
while deducting the volume of test set by 35.24%.
|
[{'version': 'v1', 'created': 'Wed, 28 Oct 2020 21:24:06 GMT'}]
|
2020-10-30
|
[array(['Fu', 'Kaiming', ''], dtype=object)
array(['Jin', 'Yulu', ''], dtype=object)
array(['Chen', 'Zhousheng', ''], dtype=object)]
|
16,825 |
cond-mat/0304331
|
Kazuko Yamasaki
|
Kazuko Yamasaki, Kenneth J. Mackin
|
Market Simulation Displaying Multifractality
|
6 pages,8 figures,The Nikkei Symposium on Application of Econophysics
| null | null | null |
cond-mat.stat-mech q-fin.TR
| null |
We proposed a market simulation model (micro model) which displays
multifractality and reproduces many important stylized facts of speculative
markets. From this model we analytically extracted the MMAR model (Multifractal
Model of Asset Returns) for the macroscopic limit.
|
[{'version': 'v1', 'created': 'Tue, 15 Apr 2003 12:37:17 GMT'}]
|
2008-12-02
|
[array(['Yamasaki', 'Kazuko', ''], dtype=object)
array(['Mackin', 'Kenneth J.', ''], dtype=object)]
|
16,826 |
cond-mat/0204161
|
thierry Jolicoeur
|
Th. Jolicoeur (ENS Paris), G. Misguich (Saclay), S. M. Girvin (Yale)
|
Magnetization process from Chern-Simons theory and its application to
SrCu2(BO3)2
|
10 pages, 7 figures, Proceedings of the 16th Nishinomiya-Yukawa
Memorial Symposium, Nishinomiya, Japan, Nov. 2001
|
Prog.Theor.Phys.Suppl.145:76,2002
|
10.1143/PTPS.145.76
|
LPMC-009
|
cond-mat.str-el
| null |
In two-dimensional systems, it is possible transmute bosons into fermions by
use of a Chern-Simons gauge field. Such a mapping is used to compute
magnetization processes of two-dimensional magnets. The calculation of the
magnetization curve then involves the structure of the Hofstadter problem for
the lattice under consideration. Certain features of the Hofstadter butterfly
are shown to imply the appearance of magnetization plateaus. While not always
successfull, this approach leads to interesting results when applied to the 2D
AF magnet SrCu2(BO3)2.
|
[{'version': 'v1', 'created': 'Sun, 7 Apr 2002 14:16:54 GMT'}]
|
2008-11-26
|
[array(['Jolicoeur', 'Th.', '', 'ENS Paris'], dtype=object)
array(['Misguich', 'G.', '', 'Saclay'], dtype=object)
array(['Girvin', 'S. M.', '', 'Yale'], dtype=object)]
|
16,827 |
1502.03918
|
Smitha M.L.
|
B.H. Shekar, Smitha M.L
|
Gradient Difference based approach for Text Localization in Compressed
domain
|
11 pages, Second International Conference on Emerging Research in
Computing, Information, Communications and Applications, Elsevier
Publications, ISBN: 9789351072638, vol. III, pp: 299-308, held at NMIT,
Bangalore August 2014
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we propose a gradient difference based approach to text
localization in videos and scene images. The input video frame/ image is first
compressed using multilevel 2-D wavelet transform. The edge information of the
reconstructed image is found which is further used for finding the maximum
gradient difference between the pixels and then the boundaries of the detected
text blocks are computed using zero crossing technique. We perform logical AND
operation of the text blocks obtained by gradient difference and the zero
crossing technique followed by connected component analysis to eliminate the
false positives. Finally, the morphological dilation operation is employed on
the detected text blocks for scene text localization. The experimental results
obtained on publicly available standard datasets illustrate that the proposed
method can detect and localize the texts of various sizes, fonts and colors.
|
[{'version': 'v1', 'created': 'Fri, 13 Feb 2015 09:08:35 GMT'}]
|
2015-02-23
|
[array(['Shekar', 'B. H.', ''], dtype=object)
array(['L', 'Smitha M.', ''], dtype=object)]
|
16,828 |
2002.12667
|
Eugenio Megias
|
Airton Deppman, Eugenio Megias, Debora P. Menezes
|
Fractal structure of Yang-Mills fields
|
12 pages, 4 figures. Talk given by E.Megias at the 8th International
Conference on New Frontiers in Physics (ICNFP 2019), 21-29 Aug 2019,
Kolymbari, Crete, Greece
| null | null | null |
hep-th hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The origin of non-extensive thermodynamics in physical systems has been under
intense debate for the last decades. Recent results indicate a connection
between non-extensive statistics and thermofractals. After reviewing this
connection, we analyze how scaling properties of Yang-Mills theory allow the
appearance of self-similar structures in gauge fields. The presence of such
structures, which actually behave as fractals, allows for recurrent
non-perturbative calculations of vertices. It is argued that when a statistical
approach is used, the non-extensive statistics is obtained, and the Tsallis
entropic index, $q$, is deduced in terms of the field theory parameters. The
results are applied to QCD in the one-loop approximation, resulting in a good
agreement with the value of $q$ obtained experimentally.
|
[{'version': 'v1', 'created': 'Fri, 28 Feb 2020 12:11:40 GMT'}]
|
2020-03-02
|
[array(['Deppman', 'Airton', ''], dtype=object)
array(['Megias', 'Eugenio', ''], dtype=object)
array(['Menezes', 'Debora P.', ''], dtype=object)]
|
16,829 |
1909.11497
|
Austin Coffman
|
Austin Coffman, Neil Cammardella, Prabir Barooah, Sean Meyn
|
Aggregate capacity of TCLs with cycling constraints
|
10 pages
| null | null | null |
eess.SY cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Thermostatically Controlled Loads (TCLs) such as air conditioners and water
heaters typically maintain their temperature within a preset range using on/off
actuation. These types of loads are inherently flexible: many different power
consumption trajectories exist that can keep the temperature within range.
Decades of research has shown that flexible loads can provide valuable grid
services.
Quantifying the power and energy capacities of a collection of TCLs is a
well-studied problem. However, most works focus on temperature constraints. In
this work, we present a characterization of the capacity of a collection of
TCLs that considers not only temperature, but also cycling and energy
constraints. The characterization leads to a set of convex constraints. A grid
operator can use this characterization to compute a feasible power consumption
trajectory for an ensemble of TCLs that comes closest to what the operator
needs to maintain demand-supply balance. Unlike prior attempts at capacity
characterizations incorporating cycling constraints, our results are
independent of the algorithm used to coordinate the TCLs.
|
[{'version': 'v1', 'created': 'Wed, 25 Sep 2019 13:49:53 GMT'}
{'version': 'v2', 'created': 'Tue, 13 Oct 2020 23:50:06 GMT'}]
|
2020-10-15
|
[array(['Coffman', 'Austin', ''], dtype=object)
array(['Cammardella', 'Neil', ''], dtype=object)
array(['Barooah', 'Prabir', ''], dtype=object)
array(['Meyn', 'Sean', ''], dtype=object)]
|
16,830 |
2109.02040
|
Yonatan Bitton
|
Yonatan Bitton, Gabriel Stanovsky, Michael Elhadad, Roy Schwartz
|
Data Efficient Masked Language Modeling for Vision and Language
|
Accepted to Findings of EMNLP 2021
| null | null | null |
cs.CL cs.CV cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Masked language modeling (MLM) is one of the key sub-tasks in vision-language
pretraining. In the cross-modal setting, tokens in the sentence are masked at
random, and the model predicts the masked tokens given the image and the text.
In this paper, we observe several key disadvantages of MLM in this setting.
First, as captions tend to be short, in a third of the sentences no token is
sampled. Second, the majority of masked tokens are stop-words and punctuation,
leading to under-utilization of the image. We investigate a range of
alternative masking strategies specific to the cross-modal setting that address
these shortcomings, aiming for better fusion of text and image in the learned
representation. When pre-training the LXMERT model, our alternative masking
strategies consistently improve over the original masking strategy on three
downstream tasks, especially in low resource settings. Further, our
pre-training approach substantially outperforms the baseline model on a
prompt-based probing task designed to elicit image objects. These results and
our analysis indicate that our method allows for better utilization of the
training data.
|
[{'version': 'v1', 'created': 'Sun, 5 Sep 2021 11:27:53 GMT'}]
|
2021-09-07
|
[array(['Bitton', 'Yonatan', ''], dtype=object)
array(['Stanovsky', 'Gabriel', ''], dtype=object)
array(['Elhadad', 'Michael', ''], dtype=object)
array(['Schwartz', 'Roy', ''], dtype=object)]
|
16,831 |
physics/0406114
|
C. J. Martoff
|
C. J. Martoff, R. Ayad, M. Katz-Hyman, G. Bonvicini, A. Schreiner
|
Negative Ion Drift and Diffusion in a TPC near 1 Bar
|
7 pages, 3 figures
|
Nucl.Instrum.Meth. A555 (2005) 55-58
|
10.1016/j.nima.2005.08.103
| null |
physics.ins-det
| null |
Drift velocity and longitudinal diffusion measurements are reported for a
Negative Ion TPC (NITPC) operating with Helium + carbon disulfide gas mixtures
at total pressures from 160 to 700 torr. Longitudinal diffusion at the
thermal-limit was observed for drift fields up to at least 700 V/cm in all gas
mixtures tested. The results are of particular interest in connection with
mechanical simplification of Dark Matter searches such as DRIFT, and for high
energy physics experiments in which a low-Z, low density, gaseous tracking
detector with no appreciable Lorentz drift is needed for operation in very high
magnetic fields.
|
[{'version': 'v1', 'created': 'Thu, 24 Jun 2004 11:24:02 GMT'}]
|
2009-11-10
|
[array(['Martoff', 'C. J.', ''], dtype=object)
array(['Ayad', 'R.', ''], dtype=object)
array(['Katz-Hyman', 'M.', ''], dtype=object)
array(['Bonvicini', 'G.', ''], dtype=object)
array(['Schreiner', 'A.', ''], dtype=object)]
|
16,832 |
1408.4024
|
Kyoungchul Kong
|
Thomas Flacke, Kyoungchul Kong, Seong Chan Park
|
A Review on Non-Minimal Universal Extra Dimensions
|
14 pages, invited review on non-minimal universal extra dimensions to
appear in Modern Physics Letters A
| null |
10.1142/S0217732315300037
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on the current status of non-minimal universal extra dimension
(UED) models. Our emphasis is on the possible extension of the minimal UED
model by allowing bulk masses and boundary localized terms. We take into
account the data from the Large Hadron Collider as well as direct and indirect
searches of dark matter and electroweak precision measurements.
|
[{'version': 'v1', 'created': 'Mon, 18 Aug 2014 14:43:14 GMT'}]
|
2015-06-22
|
[array(['Flacke', 'Thomas', ''], dtype=object)
array(['Kong', 'Kyoungchul', ''], dtype=object)
array(['Park', 'Seong Chan', ''], dtype=object)]
|
16,833 |
1501.07376
|
Valeria Simoncini
|
Michele Benzi and Valeria Simoncini
|
Decay bounds for functions of matrices with banded or Kronecker
structure
| null | null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present decay bounds for a broad class of Hermitian matrix functions where
the matrix argument is banded or a Kronecker sum of banded matrices. Besides
being significantly tighter than previous estimates, the new bounds closely
capture the actual (non-monotonic) decay behavior of the entries of functions
of matrices with Kronecker sum structure. We also discuss extensions to more
general sparse matrices.
|
[{'version': 'v1', 'created': 'Thu, 29 Jan 2015 08:45:46 GMT'}]
|
2015-01-30
|
[array(['Benzi', 'Michele', ''], dtype=object)
array(['Simoncini', 'Valeria', ''], dtype=object)]
|
16,834 |
gr-qc/0612173
|
Dan Gorbonos
|
Dan Gorbonos, Gershon Wolansky
|
A Simplified Mathematical Model for the Formation of Null Singularities
Inside Black Holes II
|
25 pages, 10 figures
|
J.Math.Phys.48:092503,2007
|
10.1063/1.2779949
| null |
gr-qc
| null |
We study a simple system of two hyperbolic semi-linear equations, inspired by
the Einstein equations. The system, which was introduced in gr-qc/0612136, is a
model for singularity formation inside black holes. We show for a particular
case of the equations that the system demonstrates a finite time blowup. The
singularity that is formed is a null singularity. Then we show that in this
particular case the singularity has features that are analogous to known
features of models of black-hole interiors - which describe the inner-horizon
instability. Our simple system may provide insight into the formation of null
singularities inside spinning or charged black holes.
|
[{'version': 'v1', 'created': 'Wed, 27 Dec 2006 21:01:17 GMT'}]
|
2008-11-26
|
[array(['Gorbonos', 'Dan', ''], dtype=object)
array(['Wolansky', 'Gershon', ''], dtype=object)]
|
16,835 |
1210.4848
|
Asrar Ahmed
|
Asrar Ahmed, Pradeep Varakantham, Shih-Fen Cheng
|
Uncertain Congestion Games with Assorted Human Agent Populations
|
Appears in Proceedings of the Twenty-Eighth Conference on Uncertainty
in Artificial Intelligence (UAI2012)
| null | null |
UAI-P-2012-PG-44-53
|
cs.GT cs.MA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Congestion games model a wide variety of real-world resource congestion
problems, such as selfish network routing, traffic route guidance in congested
areas, taxi fleet optimization and crowd movement in busy areas. However,
existing research in congestion games assumes: (a) deterministic movement of
agents between resources; and (b) perfect rationality (i.e. maximizing their
own expected value) of all agents. Such assumptions are not reasonable in
dynamic domains where decision support has to be provided to humans. For
instance, in optimizing the performance of a taxi fleet serving a city,
movement of taxis can be involuntary or nondeterministic (decided by the
specific customer who hires the taxi) and more importantly, taxi drivers may
not follow advice provided by the decision support system (due to bounded
rationality of humans). To that end, we contribute: (a) a general framework for
representing congestion games under uncertainty for populations with assorted
notions of rationality. (b) a scalable approach for solving the decision
problem for perfectly rational agents which are in the mix with boundedly
rational agents; and (c) a detailed evaluation on a synthetic and realworld
data set to illustrate the usefulness of our new approach with respect to key
social welfare metrics in the context of an assorted human-agent population. An
interesting result from our experiments on a real-world taxi fleet optimization
problem is that it is better (in terms of revenue and operational efficiency)
for taxi drivers to follow perfectly rational strategies irrespective of the
percentage of drivers not following the advice.
|
[{'version': 'v1', 'created': 'Tue, 16 Oct 2012 17:35:13 GMT'}]
|
2012-10-19
|
[array(['Ahmed', 'Asrar', ''], dtype=object)
array(['Varakantham', 'Pradeep', ''], dtype=object)
array(['Cheng', 'Shih-Fen', ''], dtype=object)]
|
16,836 |
1305.3492
|
Romain Guy
|
Romain Guy and Catherine Lar\'edo and Elisabeta Vergu
|
Approximation of epidemic models by diffusion processes and their
statistical inference
|
30 pages, 10 figures
| null | null | null |
stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Multidimensional continuous-time Markov jump processes $(Z(t))$ on
$\mathbb{Z}^p$ form a usual set-up for modeling $SIR$-like epidemics. However,
when facing incomplete epidemic data, inference based on $(Z(t))$ is not easy
to be achieved. Here, we start building a new framework for the estimation of
key parameters of epidemic models based on statistics of diffusion processes
approximating $(Z(t))$. First, \previous results on the approximation of
density-dependent $SIR$-like models by diffusion processes with small diffusion
coefficient $\frac{1}{\sqrt{N}}$, where $N$ is the population size, are
generalized to non-autonomous systems. Second, our previous inference results
on discretely observed diffusion processes with small diffusion coefficient are
extended to time-dependent diffusions. Consistent and asymptotically Gaussian
estimates are obtained for a fixed number $n$ of observations, which
corresponds to the epidemic context, and for $N\rightarrow \infty$. A
correction term, which yields better estimates non asymptotically, is also
included. Finally, performances and robustness of our estimators with respect
to various parameters such as $R_0$ (the basic reproduction number), $N$, $n$
are investigated on simulations. Two models, $SIR$ and $SIRS$, corresponding to
single and recurrent outbreaks, respectively, are used to simulate data. The
findings indicate that our estimators have good asymptotic properties and
behave noticeably well for realistic numbers of observations and population
sizes. This study lays the foundations of a generic inference method currently
under extension to incompletely observed epidemic data. Indeed, contrary to the
majority of current inference techniques for partially observed processes,
which necessitates computer intensive simulations, our method being mostly an
analytical approach requires only the classical optimization steps.
|
[{'version': 'v1', 'created': 'Wed, 15 May 2013 14:20:48 GMT'}
{'version': 'v2', 'created': 'Tue, 31 Dec 2013 15:59:07 GMT'}]
|
2014-01-03
|
[array(['Guy', 'Romain', ''], dtype=object)
array(['Larédo', 'Catherine', ''], dtype=object)
array(['Vergu', 'Elisabeta', ''], dtype=object)]
|
16,837 |
1501.01556
|
Richard L. White
|
Manuchehr Taghizadeh-Popp, S. Michael Fall, Richard L. White,
Alexander S. Szalay
|
Simulating Deep Hubble Images With Semi-empirical Models of Galaxy
Formation
|
23 pages, 23 figures; published in the Astrophysical Journal; v2:
minor changes to match final published version
|
2015, ApJ, 801, 14
|
10.1088/0004-637X/801/1/14
| null |
astro-ph.GA astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We simulate deep images from the Hubble Space Telescope (HST) using
semi-empirical models of galaxy formation with only a few basic assumptions and
parameters. We project our simulations all the way to the observational domain,
adding cosmological and instrumental effects to the images, and analyze them in
the same way as real HST images ("forward modeling"). This is a powerful tool
for testing and comparing galaxy evolution models, since it allows us to make
unbiased comparisons between the predicted and observed distributions of galaxy
properties, while automatically taking into account all relevant selection
effects.
Our semi-empirical models populate each dark matter halo with a galaxy of
determined stellar mass and scale radius. We compute the luminosity and
spectrum of each simulated galaxy from its evolving stellar mass using stellar
population synthesis models. We calculate the intrinsic scatter in the stellar
mass-halo mass relation that naturally results from enforcing a monotonically
increasing stellar mass along the merger history of each halo. The simulated
galaxy images are drawn from cutouts of real galaxies from the Sloan Digital
Sky Survey, with sizes and fluxes rescaled to match those of the model
galaxies.
The distributions of galaxy luminosities, sizes, and surface brightnesses
depend on the adjustable parameters in the models, and they agree well with
observations for reasonable values of those parameters. Measured galaxy
magnitudes and sizes have significant magnitude-dependent biases, with both
being underestimated near the magnitude detection limit. The fraction of
galaxies detected and fraction of light detected also depend sensitively on the
details of the model.
|
[{'version': 'v1', 'created': 'Tue, 6 Jan 2015 19:14:15 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Apr 2015 21:14:08 GMT'}]
|
2015-04-15
|
[array(['Taghizadeh-Popp', 'Manuchehr', ''], dtype=object)
array(['Fall', 'S. Michael', ''], dtype=object)
array(['White', 'Richard L.', ''], dtype=object)
array(['Szalay', 'Alexander S.', ''], dtype=object)]
|
16,838 |
0805.2715
|
Francesco Romeo
|
R. Citro and F. Romeo
|
The Aharonov-Bohm-Casher ring-dot as a flux-tunable resonant tunneling
diode
|
to appear on PRB
|
Phys. Rev. B 77, 193309 (2008)
|
10.1103/PhysRevB.77.193309
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A mesoscopic ring subject to the Rashba spin-orbit interaction and
sequentially coupled to an interacting quantum dot, in the presence of
Aharonov-Bohm flux, is proposed as a flux tunable tunneling diode. The analysis
of the conductance by means of the nonequilibrium Green's function technique,
shows an intrinsic bistability at varying the Aharonov-Bohm flux when 2U > \pi
\Gamma, U being the charging energy on the dot and \Gamma the effective
resonance width. The bistability properties are discussed in connection with
spin-switch effects and logical storage device applications.
|
[{'version': 'v1', 'created': 'Sun, 18 May 2008 07:28:56 GMT'}]
|
2008-05-22
|
[array(['Citro', 'R.', ''], dtype=object)
array(['Romeo', 'F.', ''], dtype=object)]
|
16,839 |
1204.4582
|
Sergey Streltsov V
|
Yu. S. Ponosov and S. V. Streltsov
|
Electronic Raman scattering in metals: effects of electron-phonon
coupling
| null |
Phys. Rev. B 86, 045138 (2012)
|
10.1103/PhysRevB.86.045138
| null |
cond-mat.str-el cond-mat.mtrl-sci cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the first systematic measurements of the Raman scattering by
electrons in elemental metals of Al, Mo, Nb, Os, Pb, Re, Ta, Ti, V, W and
metallic compound La$B_6$. Experimental spectra are modelled on the base of the
band structures, calculated within the density functional theory, taking
properly into account the effects of electron-phonon scattering. The agreement
between our measured and calculated spectra is excellent for the variety of
metals, thus providing estimates for the electron-phonon coupling constants and
temperature-dependent relaxation rates. The method can be applied for other
metallic materials to evaluate an electron-phonon coupling as an alternative to
the transport and optical measurements.
|
[{'version': 'v1', 'created': 'Fri, 20 Apr 2012 10:51:43 GMT'}
{'version': 'v2', 'created': 'Mon, 23 Apr 2012 03:46:55 GMT'}
{'version': 'v3', 'created': 'Tue, 26 Jun 2012 10:49:26 GMT'}]
|
2012-08-09
|
[array(['Ponosov', 'Yu. S.', ''], dtype=object)
array(['Streltsov', 'S. V.', ''], dtype=object)]
|
16,840 |
1503.01478
|
Tomohiro Taniguchi
|
Tomohiro Taniguchi, Seiji Mitani, and Masamitsu Hayashi
|
Critical current destabilizing perpendicular magnetization by the spin
Hall effect
|
12 pages, 8 figures
|
Phys. Rev. B 92, 024428 (2015)
|
10.1103/PhysRevB.92.024428
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The critical current needed to destabilize the magnetization of a
perpendicular ferromagnet via the spin Hall effect is studied. Both the
dampinglike and fieldlike torques associated with the spin current generated by
the spin Hall effect is included in the Landau-Lifshitz-Gilbert equation to
model the system. In the absence of the fieldlike torque, the critical current
is independent of the damping constant and is much larger than that of
conventional spin torque switching of collinear magnetic systems, as in
magnetic tunnel junctions. With the fieldlike torque included, we find that the
critical current scales with the damping constant as $\alpha^{0}$ (i.e.,
damping independent),$\alpha$, and $\alpha^{1/2}$ depending on the sign of the
fieldlike torque and other parameters such as the external field. Numerical and
analytical results show that the critical current can be significantly reduced
when the fieldlike torque possesses the appropriate sign, i.e. when the
effective field associated with the fieldlike torque is pointing opposite to
the spin direction of the incoming electrons. These results provide a pathway
to reducing the current needed to switch magnetization using the spin Hall
effect.
|
[{'version': 'v1', 'created': 'Wed, 4 Mar 2015 21:20:27 GMT'}
{'version': 'v2', 'created': 'Sat, 1 Aug 2015 01:33:27 GMT'}]
|
2015-08-04
|
[array(['Taniguchi', 'Tomohiro', ''], dtype=object)
array(['Mitani', 'Seiji', ''], dtype=object)
array(['Hayashi', 'Masamitsu', ''], dtype=object)]
|
16,841 |
1410.4155
|
Roghayeh Joda
|
Roghayeh Joda and Michele Zorzi
|
Access Policy Design for Cognitive Secondary Users under a Primary
Type-I HARQ Process
| null | null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, an underlay cognitive radio network that consists of an
arbitrary number of secondary users (SU) is considered, in which the primary
user (PU) employs Type-I Hybrid Automatic Repeat Request (HARQ). Exploiting the
redundancy in PU retransmissions, each SU receiver applies forward interference
cancelation to remove a successfully decoded PU message in the subsequent PU
retransmissions. The knowledge of the PU message state at the SU receivers and
the ACK/NACK message from the PU receiver are sent back to the transmitters.
With this approach and using a Constrained Markov Decision Process (CMDP) model
and Constrained Multi-agent MDP (CMMDP), centralized and decentralized optimum
access policies for SUs are proposed to maximize their average sum throughput
under a PU throughput constraint. In the decentralized case, the channel access
decision of each SU is unknown to the other SU. Numerical results demonstrate
the benefits of the proposed policies in terms of sum throughput of SUs. The
results also reveal that the centralized access policy design outperforms the
decentralized design especially when the PU can tolerate a low average long
term throughput. Finally, the difficulties in decentralized access policy
design with partial state information are discussed.
|
[{'version': 'v1', 'created': 'Wed, 15 Oct 2014 18:20:50 GMT'}
{'version': 'v2', 'created': 'Sat, 20 Jun 2015 12:07:46 GMT'}]
|
2015-06-23
|
[array(['Joda', 'Roghayeh', ''], dtype=object)
array(['Zorzi', 'Michele', ''], dtype=object)]
|
16,842 |
1907.07034
|
Lequan Yu
|
Lequan Yu, Shujun Wang, Xiaomeng Li, Chi-Wing Fu, Pheng-Ann Heng
|
Uncertainty-aware Self-ensembling Model for Semi-supervised 3D Left
Atrium Segmentation
|
Accepted by MICCAI2019; Code is available in
https://github.com/yulequan/UA-MT
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Training deep convolutional neural networks usually requires a large amount
of labeled data. However, it is expensive and time-consuming to annotate data
for medical image segmentation tasks. In this paper, we present a novel
uncertainty-aware semi-supervised framework for left atrium segmentation from
3D MR images. Our framework can effectively leverage the unlabeled data by
encouraging consistent predictions of the same input under different
perturbations. Concretely, the framework consists of a student model and a
teacher model, and the student model learns from the teacher model by
minimizing a segmentation loss and a consistency loss with respect to the
targets of the teacher model. We design a novel uncertainty-aware scheme to
enable the student model to gradually learn from the meaningful and reliable
targets by exploiting the uncertainty information. Experiments show that our
method achieves high performance gains by incorporating the unlabeled data. Our
method outperforms the state-of-the-art semi-supervised methods, demonstrating
the potential of our framework for the challenging semi-supervised problems.
|
[{'version': 'v1', 'created': 'Tue, 16 Jul 2019 14:34:11 GMT'}]
|
2019-07-17
|
[array(['Yu', 'Lequan', ''], dtype=object)
array(['Wang', 'Shujun', ''], dtype=object)
array(['Li', 'Xiaomeng', ''], dtype=object)
array(['Fu', 'Chi-Wing', ''], dtype=object)
array(['Heng', 'Pheng-Ann', ''], dtype=object)]
|
16,843 |
2007.11302
|
Alessandro Celestini
|
Alessandro Celestini, Marco Di Giovanni, Stefano Guarino, Francesco
Pierri
|
Information disorders on Italian Facebook during COVID-19 infodemic
|
16 pages, 13 figures, 7 tables
| null |
10.1016/j.osnem.2021.100124
| null |
cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we carry out an exploratory analysis of online conversations on
the Italian Facebook during the recent COVID-19 pandemic. We analyze the
circulation of controversial topics associated with the origin of the virus,
which involve popular targets of misinformation, such as migrants and 5G
technology. We collected over 1.5 M posts in Italian language and related to
COVID-19, shared by nearly 80k public pages and groups for a period of four
months since January 2020. Overall, we find that potentially harmful content
shared by unreliable sources is substantially negligible compared to
traditional news websites, and that discussions over controversial topics has a
limited engagement w.r.t to the pandemic in general. Besides, we highlight a
"small-worldness" effect in the URL sharing diffusion network, indicating that
users navigating through a limited set of pages could reach almost the entire
pool of shared content related to the pandemic, thus being easily exposed to
harmful propaganda as well as to verified information on the virus.
|
[{'version': 'v1', 'created': 'Wed, 22 Jul 2020 09:43:43 GMT'}]
|
2021-03-31
|
[array(['Celestini', 'Alessandro', ''], dtype=object)
array(['Di Giovanni', 'Marco', ''], dtype=object)
array(['Guarino', 'Stefano', ''], dtype=object)
array(['Pierri', 'Francesco', ''], dtype=object)]
|
16,844 |
2108.11974
|
Donghyun Kim
|
Donghyun Kim, Yi-Hsuan Tsai, Bingbing Zhuang, Xiang Yu, Stan Sclaroff,
Kate Saenko, Manmohan Chandraker
|
Learning Cross-modal Contrastive Features for Video Domain Adaptation
|
Accepted in ICCV'21
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Learning transferable and domain adaptive feature representations from videos
is important for video-relevant tasks such as action recognition. Existing
video domain adaptation methods mainly rely on adversarial feature alignment,
which has been derived from the RGB image space. However, video data is usually
associated with multi-modal information, e.g., RGB and optical flow, and thus
it remains a challenge to design a better method that considers the cross-modal
inputs under the cross-domain adaptation setting. To this end, we propose a
unified framework for video domain adaptation, which simultaneously regularizes
cross-modal and cross-domain feature representations. Specifically, we treat
each modality in a domain as a view and leverage the contrastive learning
technique with properly designed sampling strategies. As a result, our
objectives regularize feature spaces, which originally lack the connection
across modalities or have less alignment across domains. We conduct experiments
on domain adaptive action recognition benchmark datasets, i.e., UCF, HMDB, and
EPIC-Kitchens, and demonstrate the effectiveness of our components against
state-of-the-art algorithms.
|
[{'version': 'v1', 'created': 'Thu, 26 Aug 2021 18:14:18 GMT'}]
|
2021-08-30
|
[array(['Kim', 'Donghyun', ''], dtype=object)
array(['Tsai', 'Yi-Hsuan', ''], dtype=object)
array(['Zhuang', 'Bingbing', ''], dtype=object)
array(['Yu', 'Xiang', ''], dtype=object)
array(['Sclaroff', 'Stan', ''], dtype=object)
array(['Saenko', 'Kate', ''], dtype=object)
array(['Chandraker', 'Manmohan', ''], dtype=object)]
|
16,845 |
1405.3775
|
Mehdi Samadieh
|
Mohammad Gholami and Mehdi Samadieh
|
Quasi Cyclic LDPC Codes Based on Finite Set Systems
|
21 page,6 figure
| null | null | null |
cs.IT cs.CR cs.DM math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A finite set system (FSS) is a pair (V; B) where V is a finite set whose
members are called points, equipped with a finite collection of its subsets B
whose members are called blocks. In this paper, finite set systems are used to
define a class of Quasi-cyclic low- density parity-check (LDPC) codes, called
FSS codes, such that the constructed codes possess large girth and arbitrary
column-weight distributions. Especially, the constructed column weight-2 FSS
codes have higher rates than the column weight-2 geometric and cylinder-type
codes with the same girths. To find the maximum girth of FSS codes based on (V;
B), inevitable walks are defined in B such that the maximum girth is determined
by the smallest length of the inevitable walks in B. Simulation results show
that the constructed FSS codes have very good performance over the AWGN channel
with iterative decoding and achieve significantly large coding gains compared
to the random-like LDPC codes of the same lengths and rates.
|
[{'version': 'v1', 'created': 'Thu, 15 May 2014 09:25:08 GMT'}]
|
2014-05-16
|
[array(['Gholami', 'Mohammad', ''], dtype=object)
array(['Samadieh', 'Mehdi', ''], dtype=object)]
|
16,846 |
1109.1986
|
Benjamin Charlier
|
Benjamin Charlier (IMT)
|
Necessary and sufficient condition for the existence of a Fr\'echet mean
on the circle
|
First submission : Advances in Applied Probability (AAP) on May 17th
2011 (ref. AP/13983)
| null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $(\S^1,d_{\S^1})$ be the unit circle in $\R^2$ endowed with the arclength
distance. We give a sufficient and necessary condition for a general
probability measure $\mu$ to admit a well defined Fr\'echet mean on
$(\S^1,d_{\S^1})$. %This criterion allows to recover already known sufficient
conditions of existence. We derive a new sufficient condition of existence
$P(\alpha,\varphi)$ with no restriction on the support of the measure. Then, we
study the convergence of the empirical Fr\'echet mean to the Fr\'echet mean and
we give an algorithm to compute it.
|
[{'version': 'v1', 'created': 'Fri, 9 Sep 2011 12:53:49 GMT'}
{'version': 'v2', 'created': 'Wed, 7 Mar 2012 07:40:54 GMT'}]
|
2012-03-09
|
[array(['Charlier', 'Benjamin', '', 'IMT'], dtype=object)]
|
16,847 |
1702.02307
|
Mahroo Shiranzaei
|
Mahroo Shiranzaei, Fariborz Parhizgar and Hosein Cheraghchi
|
Effect of Rashba splitting on RKKY interaction in topological insulator
thin films
| null |
Phys. Rev. B 96, 024413 (2017)
|
10.1103/PhysRevB.96.024413
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we have investigated the effect of Rashba splitting on the RKKY
interaction in TI thin film both at finite and zero chemical potential. We find
that the spin susceptibility of Rashba materials including TI thin film is
strongly dependent on the direction of distance vector. Moreover, we find
another term in the off-diagonal terms of the spin-susceptibility tensor which
in contrast to the well-known DM-like term is symmetric. We show how one can
tune the RKKY interaction by using electric field applied perpendicularly to
the surface plane and by small chemical doping giving rise to enhance the RKKY
term, drastically. We have presented our results for two different situations,
namely inter-surface pairing of magnetic impurities as well as intra-surface
one. The behavior of these two situations is completely different which we
describe it by mapping the density of states of each surface on the band
dispersion.
|
[{'version': 'v1', 'created': 'Wed, 8 Feb 2017 07:21:32 GMT'}]
|
2017-07-14
|
[array(['Shiranzaei', 'Mahroo', ''], dtype=object)
array(['Parhizgar', 'Fariborz', ''], dtype=object)
array(['Cheraghchi', 'Hosein', ''], dtype=object)]
|
16,848 |
cond-mat/9601013
|
Supriya Krishnamurthy
|
Supriya Krishnamurthy and Mustansir Barma
|
Active-Site Motion and Pattern Formation in Self-Organised Interface
Depinning
|
Revtex, 4 pages, 5 figures available upon request from author. To
appear in Physical Review Letters
| null | null |
TIFR/TH/95-37
|
cond-mat
| null |
We study a dynamically generated pattern in height gradients, centered around
the active growth site, in the steady state of a self-organised interface
depinning model. The pattern has a power-law tail and depends on interface
slope. An approximate integral equation relates the profile to local interface
readjustments and long-ranged jumps of the active site. The pattern results in
a two-point correlation function saturating to a finite value which depends on
system size. Pattern formation is generic to systems in which the dynamics
leads to correlated motion of the active site.
|
[{'version': 'v1', 'created': 'Fri, 5 Jan 1996 10:56:21 GMT'}]
|
2007-05-23
|
[array(['Krishnamurthy', 'Supriya', ''], dtype=object)
array(['Barma', 'Mustansir', ''], dtype=object)]
|
16,849 |
1901.00861
|
Bradley Gram-Hansen
|
Bradley Gram-Hansen, Patrick Helber, Indhu Varatharajan, Faiza Azam,
Alejandro Coca-Castro, Veronika Kopackova, Piotr Bilinski
|
Mapping Informal Settlements in Developing Countries using Machine
Learning and Low Resolution Multi-spectral Data
|
Published at the AAAI/ACM Conference on AI, ethics and society.
Extended results from our previous workshop: arXiv:1812.00812
|
AAAI/ACM Conference on AI, Ethics, and Society (AIES 2019)
|
10.1145/3306618.3314253
| null |
cs.CY cs.CV cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Informal settlements are home to the most socially and economically
vulnerable people on the planet. In order to deliver effective economic and
social aid, non-government organizations (NGOs), such as the United Nations
Children's Fund (UNICEF), require detailed maps of the locations of informal
settlements. However, data regarding informal and formal settlements is
primarily unavailable and if available is often incomplete. This is due, in
part, to the cost and complexity of gathering data on a large scale. To address
these challenges, we, in this work, provide three contributions. 1) A brand new
machine learning data-set, purposely developed for informal settlement
detection. 2) We show that it is possible to detect informal settlements using
freely available low-resolution (LR) data, in contrast to previous studies that
use very-high resolution (VHR) satellite and aerial imagery, something that is
cost-prohibitive for NGOs. 3) We demonstrate two effective classification
schemes on our curated data set, one that is cost-efficient for NGOs and
another that is cost-prohibitive for NGOs, but has additional utility. We
integrate these schemes into a semi-automated pipeline that converts either a
LR or VHR satellite image into a binary map that encodes the locations of
informal settlements.
|
[{'version': 'v1', 'created': 'Thu, 3 Jan 2019 16:51:40 GMT'}
{'version': 'v2', 'created': 'Fri, 8 Mar 2019 23:18:26 GMT'}
{'version': 'v3', 'created': 'Thu, 30 May 2019 11:11:39 GMT'}]
|
2019-05-31
|
[array(['Gram-Hansen', 'Bradley', ''], dtype=object)
array(['Helber', 'Patrick', ''], dtype=object)
array(['Varatharajan', 'Indhu', ''], dtype=object)
array(['Azam', 'Faiza', ''], dtype=object)
array(['Coca-Castro', 'Alejandro', ''], dtype=object)
array(['Kopackova', 'Veronika', ''], dtype=object)
array(['Bilinski', 'Piotr', ''], dtype=object)]
|
16,850 |
1811.01058
|
Giovanni Gaiffi
|
Giovanni Gaiffi, Viola Siconolfi
|
Wonderful models for generalized Dowling arrangements
|
In this revised version the bijection in Section 5 has been improved
and holds also in the case when G is not abelian
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For any triple given by a positive integer n, a finite group G, and a
faithful representation V of G, one can describe a subspace arrangement whose
intersection lattice is a generalized Dowling lattice in the sense of Hanlon.
In this paper we construct the minimal De Concini-Procesi wonderful model
associated to this subspace arrangement and give a description of its boundary.
Our aim is to point out the nice poset provided by the intersections of the
irreducible components in the boundary, which provides a geometric realization
of the nested set poset of this generalized Dowling lattice. It can be
represented by a family of forests with leaves and labelings that depend on the
triple (n,G,V). We will study it from the enumerative point of view in the case
when G is abelian.
|
[{'version': 'v1', 'created': 'Fri, 2 Nov 2018 19:09:27 GMT'}
{'version': 'v2', 'created': 'Fri, 23 Aug 2019 16:31:29 GMT'}]
|
2019-08-26
|
[array(['Gaiffi', 'Giovanni', ''], dtype=object)
array(['Siconolfi', 'Viola', ''], dtype=object)]
|
16,851 |
2003.12199
|
George Thomas
|
George Thomas, Azat Gubaydullin, Dmitry S. Golubev, Jukka P. Pekola
|
Thermally pumped on-chip maser
|
9 pages, 3 figures
|
Phys. Rev. B 102, 104503 (2020)
|
10.1103/PhysRevB.102.104503
| null |
cond-mat.supr-con quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a theoretical model of an on-chip three-level maser in a
superconducting circuit based on a single artificial atom and pumped by a
temperature gradient between thermal baths coupled to different interlevel
transitions. We show that maser powers of the order of a few femtowatts, well
exceeding the resolution of the sensitive bolometry, can be achieved with
typical circuit parameters. We also demonstrate that population inversion in
the artificial atom can be detected without measuring coherent radiation output
of the maser. For that purpose, the system should operate as a three-terminal
heat transport device. The hallmark of population inversion is the influx of
heat power into the weakly coupled output terminal even though its temperature
exceeds the temperatures of the two other terminals. The proposed method of
on-chip conversion of heat into microwave radiation and control of energy-level
populations by heating provide additional useful tools for circuit quantum
electrodynamics experiments.
|
[{'version': 'v1', 'created': 'Fri, 27 Mar 2020 01:21:58 GMT'}
{'version': 'v2', 'created': 'Fri, 11 Sep 2020 12:45:38 GMT'}]
|
2020-09-14
|
[array(['Thomas', 'George', ''], dtype=object)
array(['Gubaydullin', 'Azat', ''], dtype=object)
array(['Golubev', 'Dmitry S.', ''], dtype=object)
array(['Pekola', 'Jukka P.', ''], dtype=object)]
|
16,852 |
astro-ph/9610054
|
Taoling Xie
|
Taoling Xie, L. Mundy, S. Vogel and P. Hofner
|
On Turbulent Pressure Confinement of Ultra-Compact HII Regions
|
11 pages, 1 figure, ApJ Letters
| null | null | null |
astro-ph
| null |
It has been proposed recently that the small size and long lifetime of
ultra-compact HII regions (UCHIIs) could be due to pressure confinement if the
thermal pressure of the ambient gas is higher than previous estimates. We point
out that confinement by thermal pressure alone implies emission measures in
excess of observed values. We show that turbulent pressure, inferred from
observed non-thermal velocities, is sufficient to confine UC HIIs and explain
their longevity. We predict an anti-correlation between the size of UCHIIs and
the velocity dispersion of the ambient neutral gas, and show that it is
consistent with existing observations.
|
[{'version': 'v1', 'created': 'Wed, 9 Oct 1996 02:05:30 GMT'}]
|
2007-05-23
|
[array(['Xie', 'Taoling', ''], dtype=object)
array(['Mundy', 'L.', ''], dtype=object)
array(['Vogel', 'S.', ''], dtype=object)
array(['Hofner', 'P.', ''], dtype=object)]
|
16,853 |
1605.02385
|
Michael Dopita
|
Michael A. Dopita, Ivo R. Seitenzahl, Ralph S. Sutherland,
Fr\'ed\'eric P. A. Vogt, P. Frank Winkler and William P. Blair
|
Forbidden Iron Lines and Dust Destruction in Supernova Remnant Shocks:
The Case of N49 in the Large Magellanic Cloud
|
Accepted for publication in Astrophysical Journal, 14 pages, 10
figures
| null |
10.3847/0004-637X/826/2/150
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present results of a complete integral field survey of the bright SNR N49
in the LMC, obtained with the WiFeS instrument mounted on the ANU 2.3m
telescope at Siding Spring Observatory. From theoretical shock modelling with
the new MAPPINGS 5.1 code we have, for the first time, subjected the optical Fe
emission line spectrum of a supernova remnant to a detailed abundance and
dynamical analysis covering 8 separate stages of ionisation. This allows us to
derive the dust depletion factors as a function of ionisation stage. We have
shown that there is substantial (30% - 90%) destruction of Fe-bearing dust
grains in these fast shocks ($v_s \sim 250$ km/s), and we have confirmed that
the dominant dust destruction is through the non-thermal sputtering and
grain-grain collision mechanisms developed in a number of theoretical works.
|
[{'version': 'v1', 'created': 'Sun, 8 May 2016 23:22:20 GMT'}]
|
2016-08-03
|
[array(['Dopita', 'Michael A.', ''], dtype=object)
array(['Seitenzahl', 'Ivo R.', ''], dtype=object)
array(['Sutherland', 'Ralph S.', ''], dtype=object)
array(['Vogt', 'Frédéric P. A.', ''], dtype=object)
array(['Winkler', 'P. Frank', ''], dtype=object)
array(['Blair', 'William P.', ''], dtype=object)]
|
16,854 |
1103.4053
|
Sam Azadi
|
Mariapia Marchi, Sam Azadi, and Sandro Sorella
|
The fate of the resonating valence bond in graphene
|
4 pages, 4 figures, submitted to Phys. Rev. Lett
| null |
10.1103/PhysRevLett.107.086807
| null |
cond-mat.str-el cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We apply a variational wave function capable of describing qualitatively and
quantitatively the so called "resonating valence bond" in realistic materials,
by improving standard ab initio calculations by means of quantum Monte Carlo
methods. In this framework we clearly identify the Kekul\'e and Dewar
contributions to the chemical bond of the benzene molecule, and we establish
the corresponding resonating valence bond energy of these well known structures
($\simeq 0.01$eV/atom). We apply this method to unveil the nature of the
chemical bond in undoped graphene and show that this picture remains only
within a small "resonance length" of few atomic units.
|
[{'version': 'v1', 'created': 'Mon, 21 Mar 2011 15:31:27 GMT'}
{'version': 'v2', 'created': 'Tue, 22 Mar 2011 08:22:39 GMT'}]
|
2015-05-27
|
[array(['Marchi', 'Mariapia', ''], dtype=object)
array(['Azadi', 'Sam', ''], dtype=object)
array(['Sorella', 'Sandro', ''], dtype=object)]
|
16,855 |
quant-ph/0104068
|
Yi-Xin Chen
|
Yi-Xin Chen and Dong Yang
|
Optimally Conclusive Discrimination of Non-orthogonal Entangled States
Locally
|
4 pages, no figure, revtex. few typos corrected
| null |
10.1103/PhysRevA.65.022320
| null |
quant-ph
| null |
We consider one copy of a quantum system prepared with equal prior
probability in one of two non-orthogonal entangled states of multipartite
distributed among separated parties. We demonstrate that these two states can
be optimally distinguished in the sense of conclusive discrimination by local
operations and classical communications(LOCC) alone. And this proves strictly
the conjecture that Virmani et.al. [8] confirmed numerically and analytically.
Generally, the optimal protocol requires local POVM operations which are
explicitly constructed. The result manifests that the distinguishable
information is obtained only and completely at the last operation and all prior
ones give no information about that state.
|
[{'version': 'v1', 'created': 'Fri, 13 Apr 2001 04:17:59 GMT'}
{'version': 'v2', 'created': 'Mon, 16 Apr 2001 08:18:26 GMT'}]
|
2013-05-29
|
[array(['Chen', 'Yi-Xin', ''], dtype=object)
array(['Yang', 'Dong', ''], dtype=object)]
|
16,856 |
1001.0956
|
Robert Grober
|
Robert D. Grober
|
An Accelerometer Based Instrumentation of the Golf Club: Measurement and
Signal Analysis
|
23 pages, 11 figures
| null | null | null |
physics.ins-det physics.pop-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Two accelerometers are used to measure the motion of the golf club. The
accelerometers are mounted in the shaft of the golf club. Each measures the
acceleration along the axis of the shaft of the golf club. Interpreting the
measurement with the context of the double pendulum model of the golf swing, it
is useful to resolve the resulting signals into differential and common mode
components. The differential mode is a measure of the rotational kinetic energy
of the golf club, and this can be used to understand the tempo, rhythm, and
timing of the golf swing. The common mode measurement is related to the motion
of the hands. It is shown that both components can be used to recover the
motion of the swing within the context of the double pendulum model of the golf
swing.
|
[{'version': 'v1', 'created': 'Wed, 6 Jan 2010 20:40:45 GMT'}]
|
2010-01-07
|
[array(['Grober', 'Robert D.', ''], dtype=object)]
|
16,857 |
2205.06680
|
Shu Hu
|
Hui Guo, Shu Hu, Xin Wang, Ming-Ching Chang, Siwei Lyu
|
Open-Eye: An Open Platform to Study Human Performance on Identifying
AI-Synthesized Faces
|
Accepted by IEEE 5th International Conference on Multimedia
Information Processing and Retrieval (MIPR), 2022. arXiv admin note:
substantial text overlap with arXiv:2109.00162
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
AI-synthesized faces are visually challenging to discern from real ones. They
have been used as profile images for fake social media accounts, which leads to
high negative social impacts. Although progress has been made in developing
automatic methods to detect AI-synthesized faces, there is no open platform to
study the human performance of AI-synthesized faces detection. In this work, we
develop an online platform called Open-eye to study the human performance of
AI-synthesized face detection. We describe the design and workflow of the
Open-eye in this paper.
|
[{'version': 'v1', 'created': 'Fri, 13 May 2022 14:30:59 GMT'}]
|
2022-05-24
|
[array(['Guo', 'Hui', ''], dtype=object)
array(['Hu', 'Shu', ''], dtype=object)
array(['Wang', 'Xin', ''], dtype=object)
array(['Chang', 'Ming-Ching', ''], dtype=object)
array(['Lyu', 'Siwei', ''], dtype=object)]
|
16,858 |
0905.0963
|
Dmitri Melikhov
|
Wolfgang Lucha, Dmitri Melikhov, Silvano Simula
|
Bound-state parameters from dispersive sum rules for vacuum-to-vacuum
correlators
|
Introduction modified, comment on analytic properties of dual
correlators added
|
J.Phys.G37:035003,2010
|
10.1088/0954-3899/37/3/035003
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the extraction of the ground-state parameters from vacuum-to-vacuum
correlators. We work in quantum-mechanical potential model which provides the
only possibility to probe the reliability and the actual accuracy of this
method: one obtains the bound-state parameters from the correlators by the
standard procedures adopted in the method of sum rules and compares these
results with the exact values calculated from the Schroedinger equation. We
focus on the crucial ingredient of the method of sum rules - the effective
continuum threshold - and propose a new algorithm to fix this quantity. In a
quantum-mechanical model, our procedure leads to a remarkable improvement of
the accuracy of the extracted ground-state parameters compared to the standard
procedures adopted in the method and used in all previous applications of
dispersive sum rules in QCD. The application of the proposed procedure in QCD
promises a considerable increase of the accuracy of the extracted hadron
parameters.
|
[{'version': 'v1', 'created': 'Thu, 7 May 2009 14:03:30 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Oct 2009 10:52:13 GMT'}]
|
2010-02-05
|
[array(['Lucha', 'Wolfgang', ''], dtype=object)
array(['Melikhov', 'Dmitri', ''], dtype=object)
array(['Simula', 'Silvano', ''], dtype=object)]
|
16,859 |
2101.03129
|
Supriya Pan
|
Weiqiang Yang, Supriya Pan, Eleonora Di Valentino, Olga Mena and
Alessandro Melchiorri
|
2021-$H_0$ Odyssey: Closed, Phantom and Interacting Dark Energy
Cosmologies
|
Revised version; 12 pages, 2 figures and 7 tables; published version
in JCAP
|
JCAP 10 (2021) 008
|
10.1088/1475-7516/2021/10/008
| null |
astro-ph.CO gr-qc
|
http://creativecommons.org/licenses/by/4.0/
|
Up-to-date cosmological data analyses have shown that \textit{(a)} a closed
universe is preferred by the Planck data at more than $99\%$ CL, and
\textit{(b)} interacting scenarios offer a very compelling solution to the
Hubble constant tension. In light of these two recent appealing scenarios, we
consider here an interacting dark matter-dark energy model with a non-zero
spatial curvature component and a freely varying dark energy equation of state
in both the quintessential and phantom regimes. When considering Cosmic
Microwave Background data only, a phantom and closed universe can perfectly
alleviate the Hubble tension, without the necessity of a coupling among the
dark sectors. Accounting for other possible cosmological observations
compromises the viability of this very attractive scenario as a global solution
to current cosmological tensions, either by spoiling its effectiveness
concerning the $H_0$ problem, as in the case of Supernovae Ia data, or by
introducing a strong disagreement in the preferred value of the spatial
curvature, as in the case of Baryon Acoustic Oscillations.
|
[{'version': 'v1', 'created': 'Fri, 8 Jan 2021 17:43:27 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Sep 2021 16:17:14 GMT'}
{'version': 'v3', 'created': 'Mon, 11 Oct 2021 15:29:43 GMT'}]
|
2021-10-12
|
[array(['Yang', 'Weiqiang', ''], dtype=object)
array(['Pan', 'Supriya', ''], dtype=object)
array(['Di Valentino', 'Eleonora', ''], dtype=object)
array(['Mena', 'Olga', ''], dtype=object)
array(['Melchiorri', 'Alessandro', ''], dtype=object)]
|
16,860 |
physics/0208029
|
Mehran Kardar
|
Mehran Kardar and A. Zee
|
Information Optimization in Coupled Audio-Visual Cortical Maps
|
7 pages, 1 figure
| null |
10.1073/pnas.252472699
|
NSF ITP 0-2-69
|
physics.bio-ph cond-mat.stat-mech q-bio
| null |
Barn owls hunt in the dark by using cues from both sight and sound to locate
their prey. This task is facilitated by topographic maps of the external space
formed by neurons (e.g., in the optic tectum) that respond to visual or aural
signals from a specific direction. Plasticity of these maps has been studied in
owls forced to wear prismatic spectacles that shift their visual field.
Adaptive behavior in young owls is accompanied by a compensating shift in the
response of (mapped) neurons to auditory signals. We model the receptive fields
of such neurons by linear filters that sample correlated audio-visual signals,
and search for filters that maximize the gathered information, while subject to
the costs of rewiring neurons. Assuming a higher fidelity of visual
information, we find that the corresponding receptive fields are robust and
unchanged by artificial shifts. The shape of the aural receptive field,
however, is controlled by correlations between sight and sound. In response to
prismatic glasses, the aural receptive fields shift in the compensating
direction, although their shape is modified due to the costs of rewiring.
|
[{'version': 'v1', 'created': 'Wed, 7 Aug 2002 20:14:56 GMT'}]
|
2009-11-07
|
[array(['Kardar', 'Mehran', ''], dtype=object)
array(['Zee', 'A.', ''], dtype=object)]
|
16,861 |
1309.6550
|
Ryuhei Mori
|
Ryuhei Mori
|
Loop Calculus for Non-Binary Alphabets using Concepts from Information
Geometry
|
18 pages, 4 figures, submitted to IEEE Trans. Inf. Theory
| null | null | null |
cs.IT cond-mat.stat-mech math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Bethe approximation is a well-known approximation of the partition
function used in statistical physics. Recently, an equality relating the
partition function and its Bethe approximation was obtained for graphical
models with binary variables by Chertkov and Chernyak. In this equality, the
multiplicative error in the Bethe approximation is represented as a weighted
sum over all generalized loops in the graphical model. In this paper, the
equality is generalized to graphical models with non-binary alphabet using
concepts from information geometry.
|
[{'version': 'v1', 'created': 'Wed, 25 Sep 2013 15:51:23 GMT'}
{'version': 'v2', 'created': 'Mon, 30 Jun 2014 03:10:18 GMT'}
{'version': 'v3', 'created': 'Fri, 19 Dec 2014 08:35:28 GMT'}]
|
2014-12-22
|
[array(['Mori', 'Ryuhei', ''], dtype=object)]
|
16,862 |
1902.05044
|
Sudheer Mishra Kumar
|
Sudheer K. Mishra, A.K. Srivastava
|
The Evolution of Magnetic Rayleigh-Taylor Unstable Plumes and Hybrid
KH-RT Instability into A Loop-like Eruptive Prominence
|
25 pages, 8 figures, 1 table
| null |
10.3847/1538-4357/ab06f2
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
MRT unstable plumes are observed in a loop-like eruptive prominence using
SDO/AIA observations. The small-scale cavities are developed within the
prominence, where perturbations trigger dark plumes (P1 \& P2) propagating with
the speed of 35-46 km s$^{-1} $. The self-similar plume formation shows
initially the growth of linear MRT unstable plume (P1), and thereafter the
evolution of non-linear single mode MRT unstable second plume (P2). The
Differential Emission Measure (DEM) analysis shows that plumes are less denser
and hotter than the prominence. We have estimated the observational growth rate
for both plumes as 1.32$\pm$0.29$\times$ 10$^{-3}$ s$^{-1}$ and
1.48$\pm$0.29$\times$ 10$^{-3}$ s$^{-1}$ respectively, which are comparable to
the estimated theoretical growth rate (1.95$\times$ 10$^{-3}$ s$^{-1}$) . The
nonlinear phase of an MRT unstable plume (P2) may collapse via Kelvin-Helmholtz
vortex formation in the downfalling plasma. Later, a plasma thread has been
evident in the rising segment of this prominence. It may be associated with the
tangled field and Rayleigh-Taylor instability. The tangled field initiates
shearing at the prominence-cavity boundary. Due to this shear motion, the
plasma downfall has occurred at the right part of the prominence-cavity
boundary. It triggers the characteristic of KH unstable vortices and MRT
unstable plasma bubbles propagating at different speeds and merging with each
other. The shear motion and lateral plasma downfall may initiate hybrid KH-RT
instability there.
|
[{'version': 'v1', 'created': 'Wed, 13 Feb 2019 18:16:49 GMT'}]
|
2019-03-27
|
[array(['Mishra', 'Sudheer K.', ''], dtype=object)
array(['Srivastava', 'A. K.', ''], dtype=object)]
|
16,863 |
2303.17591
|
Kai Wang
|
Eric Zhang, Kai Wang, Xingqian Xu, Zhangyang Wang, Humphrey Shi
|
Forget-Me-Not: Learning to Forget in Text-to-Image Diffusion Models
| null | null | null | null |
cs.CV cs.AI cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The unlearning problem of deep learning models, once primarily an academic
concern, has become a prevalent issue in the industry. The significant advances
in text-to-image generation techniques have prompted global discussions on
privacy, copyright, and safety, as numerous unauthorized personal IDs, content,
artistic creations, and potentially harmful materials have been learned by
these models and later utilized to generate and distribute uncontrolled
content. To address this challenge, we propose \textbf{Forget-Me-Not}, an
efficient and low-cost solution designed to safely remove specified IDs,
objects, or styles from a well-configured text-to-image model in as little as
30 seconds, without impairing its ability to generate other content. Alongside
our method, we introduce the \textbf{Memorization Score (M-Score)} and
\textbf{ConceptBench} to measure the models' capacity to generate general
concepts, grouped into three primary categories: ID, object, and style. Using
M-Score and ConceptBench, we demonstrate that Forget-Me-Not can effectively
eliminate targeted concepts while maintaining the model's performance on other
concepts. Furthermore, Forget-Me-Not offers two practical extensions: a)
removal of potentially harmful or NSFW content, and b) enhancement of model
accuracy, inclusion and diversity through \textbf{concept correction and
disentanglement}. It can also be adapted as a lightweight model patch for
Stable Diffusion, allowing for concept manipulation and convenient
distribution. To encourage future research in this critical area and promote
the development of safe and inclusive generative models, we will open-source
our code and ConceptBench at
\href{https://github.com/SHI-Labs/Forget-Me-Not}{https://github.com/SHI-Labs/Forget-Me-Not}.
|
[{'version': 'v1', 'created': 'Thu, 30 Mar 2023 17:58:11 GMT'}]
|
2023-03-31
|
[array(['Zhang', 'Eric', ''], dtype=object)
array(['Wang', 'Kai', ''], dtype=object)
array(['Xu', 'Xingqian', ''], dtype=object)
array(['Wang', 'Zhangyang', ''], dtype=object)
array(['Shi', 'Humphrey', ''], dtype=object)]
|
16,864 |
2105.13029
|
Luc Dessart
|
Luc Dessart, D. John Hillier, Tuguldur Sukhbold, Stan Woosley, and
H.-T. Janka
|
The explosion of 9$-$29$M_\odot$ stars as Type II supernovae : results
from radiative-transfer modeling at one year after explosion
|
Accepted for publication in A&A
|
A&A 652, A64 (2021)
|
10.1051/0004-6361/202140839
| null |
astro-ph.SR astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a set of nonlocal thermodynamic equilibrium steady-state
calculations of radiative transfer for one-year old type II supernovae (SNe)
starting from state-of-the-art explosion models computed with detailed
nucleosynthesis. This grid covers single-star progenitors with initial masses
between 9 and 29$M_{\odot}$, all evolved with KEPLER at solar metallicity and
ignoring rotation. The [OI]$\lambda\lambda$$6300,6364$ line flux generally
grows with progenitor mass, and H$\alpha$ exhibits an equally strong and
opposite trend. The [CaII]$\lambda\lambda$$7291,\,7323$ strength increases at
low $^{56}$Ni mass, low explosion energy, or with clumping. This CaII doublet,
which forms primarily in the explosively-produced Si/S zones, depends little on
the progenitor mass, but may strengthen if Ca$^+$ dominates in the H-rich
emitting zones or if Ca is abundant in the O-rich zones. Indeed, Si-O shell
merging prior to core collapse may boost the CaII doublet at the expense of the
OI doublet, and may thus mimic the metal line strengths of a lower mass
progenitor. We find that the $^{56}$Ni bubble effect has a weak impact,
probably because it is too weak to induce much of an ionization shift in the
various emitting zones. Our simulations compare favorably to observed SNe II,
including SN2008bk (e.g., 9$M_{\odot}$ model), SN2012aw (12$M_{\odot}$ model),
SN1987A (15$M_{\odot}$ model), or SN2015bs (25$M_{\odot}$ model with no Si-O
shell merging). SNe II with narrow lines and a low $^{56}$Ni mass are well
matched by the weak explosion of 9$-$11$M_{\odot}$ progenitors. The
nebular-phase spectra of standard SNe II can be explained with progenitors in
the mass range 12$-$15$M_{\odot}$, with one notable exception for SN2015bs. In
the intermediate mass range, these mass estimates may increase by a few
$M_{\odot}$ with allowance for clumping of the O-rich material or CO molecular
cooling.
|
[{'version': 'v1', 'created': 'Thu, 27 May 2021 09:50:31 GMT'}]
|
2021-08-11
|
[array(['Dessart', 'Luc', ''], dtype=object)
array(['Hillier', 'D. John', ''], dtype=object)
array(['Sukhbold', 'Tuguldur', ''], dtype=object)
array(['Woosley', 'Stan', ''], dtype=object)
array(['Janka', 'H. -T.', ''], dtype=object)]
|
16,865 |
1706.03078
|
Alberto Bietti
|
Alberto Bietti and Julien Mairal
|
Group Invariance, Stability to Deformations, and Complexity of Deep
Convolutional Representations
| null |
Journal of Machine Learning Research 20 (2019) 1-49
| null | null |
stat.ML cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The success of deep convolutional architectures is often attributed in part
to their ability to learn multiscale and invariant representations of natural
signals. However, a precise study of these properties and how they affect
learning guarantees is still missing. In this paper, we consider deep
convolutional representations of signals; we study their invariance to
translations and to more general groups of transformations, their stability to
the action of diffeomorphisms, and their ability to preserve signal
information. This analysis is carried by introducing a multilayer kernel based
on convolutional kernel networks and by studying the geometry induced by the
kernel mapping. We then characterize the corresponding reproducing kernel
Hilbert space (RKHS), showing that it contains a large class of convolutional
neural networks with homogeneous activation functions. This analysis allows us
to separate data representation from learning, and to provide a canonical
measure of model complexity, the RKHS norm, which controls both stability and
generalization of any learned model. In addition to models in the constructed
RKHS, our stability analysis also applies to convolutional networks with
generic activations such as rectified linear units, and we discuss its
relationship with recent generalization bounds based on spectral norms.
|
[{'version': 'v1', 'created': 'Fri, 9 Jun 2017 18:02:47 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Nov 2017 12:08:20 GMT'}
{'version': 'v3', 'created': 'Sun, 8 Apr 2018 14:36:45 GMT'}
{'version': 'v4', 'created': 'Wed, 10 Oct 2018 21:17:35 GMT'}]
|
2019-02-14
|
[array(['Bietti', 'Alberto', ''], dtype=object)
array(['Mairal', 'Julien', ''], dtype=object)]
|
16,866 |
hep-th/9408001
|
C. H. Oh
|
C. H. Oh and K. Singh
|
Realizations of the $q$-Heisenberg and $q$-Virasoro Algebras
|
9 pages
| null |
10.1088/0305-4470/27/10/020
|
NUS/HEP/94203
|
hep-th math.QA
| null |
We give field theoretic realizations of both the $q$-Heisenberg and the
$q$-Virasoro algebra. In particular, we obtain the operator product expansions
among the current and the energy momentum tensor obtained using the Sugawara
construction.
|
[{'version': 'v1', 'created': 'Mon, 1 Aug 1994 09:21:25 GMT'}]
|
2009-10-28
|
[array(['Oh', 'C. H.', ''], dtype=object)
array(['Singh', 'K.', ''], dtype=object)]
|
16,867 |
1308.2157
|
Hans Jockers
|
James Halverson, Hans Jockers, Joshua M. Lapan, David R. Morrison
|
Perturbative Corrections to Kahler Moduli Spaces
|
28 pages; v2: discussion in section 5 extended and refs. added
|
Commun.Math.Phys. 333 (2015) 1563-1584
|
10.1007/s00220-014-2157-z
|
NSF-KITP-13-144, BONN-TH-2013-12, UCSB Math 2013-17
|
hep-th math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a general formula for perturbative-in-alpha' corrections to the
Kahler potential on the quantum Kahler moduli space of Calabi-Yau n-folds, for
any n, in their asymptotic large volume regime. The knowledge of such
perturbative corrections provides an important ingredient needed to analyze the
full structure of this Kahler potential, including nonperturbative corrections
such as the Gromov-Witten invariants of the Calabi-Yau n-folds. We argue that
the perturbative corrections take a universal form, and we find that this form
is encapsulated in a specific additive characteristic class of the Calabi-Yau
n-fold which we call the log Gamma class, and which arises naturally in a
generalization of Mukai's modified Chern character map. Our proposal is
inspired heavily by the recent observation of an equality between the partition
function of certain supersymmetric, two-dimensional gauge theories on a
two-sphere, and the aforementioned Kahler potential. We further strengthen our
proposal by comparing our findings on the quantum Kahler moduli space to the
complex structure moduli space of the corresponding mirror Calabi-Yau geometry.
|
[{'version': 'v1', 'created': 'Fri, 9 Aug 2013 15:22:27 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Aug 2013 18:41:15 GMT'}]
|
2015-01-27
|
[array(['Halverson', 'James', ''], dtype=object)
array(['Jockers', 'Hans', ''], dtype=object)
array(['Lapan', 'Joshua M.', ''], dtype=object)
array(['Morrison', 'David R.', ''], dtype=object)]
|
16,868 |
1502.00900
|
Rasmus S{\o}gaard Christensen M.Sc.
|
Rasmus S{\o}gaard Christensen, Georg M. Bruun
|
Quasiparticle scattering rate in a strongly polarised Fermi mixture
|
7 pages, 5 figures
|
Phys. Rev. A 91 (2015), 042702
|
10.1103/PhysRevA.91.042702
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyse the scattering rate of an impurity atom in a Fermi sea as a
function of momentum and temperature in the BCS-BEC crossover. The cross
section is calculated using a microscopic multichannel theory for the Feshbach
resonance scattering, including finite range and medium effects. We show that
pair correlations significantly increase the cross section for strong
interactions close to the unitarity regime. These pair correlations give rise
to a molecule pole of the cross section at negative energy on the BEC side of
the resonance, which smoothly evolves into a resonance at positive scattering
energy with a non-zero imaginary part on the BCS side. The resonance is the
analogue of superfluid pairing for the corresponding population balanced
system. Using Fermi liquid theory, we then show that the low temperature
scattering rate of the impurity atom is significantly increased due to these
pair correlations for low momenta. We demonstrate that finite range and mass
imbalance effects are significant for the experimentally relevant
$^6$Li-$^{40}$K mixture, and we finally discuss how the scattering rate can be
measured using radio-frequency spectroscopy and Bose-Fermi mixtures.
|
[{'version': 'v1', 'created': 'Tue, 3 Feb 2015 15:56:24 GMT'}]
|
2015-10-19
|
[array(['Christensen', 'Rasmus Søgaard', ''], dtype=object)
array(['Bruun', 'Georg M.', ''], dtype=object)]
|
16,869 |
0906.0802
|
Dan Pirjol
|
Dan Pirjol, Carlos Schat
|
Permutation group S_N and hadron spectroscopy
|
Talk given at the International Workshop on Effective Field Theories:
from the Pion to the Upsilon, EFT09, 1-6 February 2009, Valencia
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the application of the permutation group S_N to a few problems in
hadron physics. A method is proposed for matching a quark model Hamiltonian
onto the effective Hamiltonian of the 1/Nc expansion, which makes use of the
transformation properties of the states and operators under S_N. This method is
used to obtain information about the spin-flavor structure of the quark
interaction Hamiltonian from the spectrum of the negative parity L=1 excited
baryons. Assuming the most general 2-body quark Hamiltonian, we derive two
correlations among the masses and mixing angles of these states which should
hold in any quark model. These correlations constrain the mixing angles, and
can be used to test for the presence of 3-body quark interactions. We find that
the pure gluon-exchange model is disfavored by data, independently of any
assumptions about the hadronic wave functions.
|
[{'version': 'v1', 'created': 'Thu, 4 Jun 2009 13:31:19 GMT'}]
|
2009-06-05
|
[array(['Pirjol', 'Dan', ''], dtype=object)
array(['Schat', 'Carlos', ''], dtype=object)]
|
16,870 |
1106.5604
|
Xiaoling Cui
|
Wenbo Fu, Zhenhua Yu, Xiaoling Cui
|
Separation induced resonances in quasi-one-dimensional ultracold atomic
gases
|
8 pages, 6 figures, published version
|
Phys Rev A 85, 012703(2012)
|
10.1103/PhysRevA.85.012703
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the effective one-dimensional (1D) scattering of two distinguishable
atoms confined individually by {\em separated} transverse harmonic traps. With
equal trapping frequency for two s-wave interacting atoms, we find that by
tuning the trap separations, the system can undergo {\em double} 1D scattering
resonance, named as the separation induced resonance(SIR), when the ratio
between the confinement length and s-wave scattering length is within
$(0.791,1.46]$. Near SIR, the scattering property shows unique dependence on
the resonance position. The universality of a many-body system on scattering
branch near SIR is demonstrated by studying the interaction effect of a
localized impurity coupled with a Fermi sea of light atoms in a quasi-1D trap.
|
[{'version': 'v1', 'created': 'Tue, 28 Jun 2011 09:38:53 GMT'}
{'version': 'v2', 'created': 'Mon, 16 Jan 2012 06:09:58 GMT'}]
|
2012-01-17
|
[array(['Fu', 'Wenbo', ''], dtype=object)
array(['Yu', 'Zhenhua', ''], dtype=object)
array(['Cui', 'Xiaoling', ''], dtype=object)]
|
16,871 |
0811.3458
|
Frank J. Petriello
|
Charalampos Anastasiou, Radja Boughezal, Frank Petriello
|
Mixed QCD-electroweak corrections to Higgs boson production in gluon
fusion
|
16 pgs., 5 figs. References and discussion added. Numerical results
updated to use recent MSTW 2008 PDFs, which decrease the predicted Tevatron
cross section
|
JHEP 0904:003,2009
|
10.1088/1126-6708/2009/04/003
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compute the 3-loop O(\alpha \alpha_s) correction to the Higgs boson
production cross section arising from light quarks using an effective theory
approach. Our calculation probes the factorization of QCD and electroweak
perturbative corrections to this process. We combine our results with the best
current estimates for contributions from top and bottom quarks to derive an
updated theoretical prediction for the Higgs boson production cross section in
gluon fusion. With the use of the MSTW 2008 parton distribution functions that
include the newest experimental data, our study results in cross sections
approximately 4-6% lower for intermediate Higgs boson masses than those used in
recent Tevatron analyses that imposed a 95% confidence level exclusion limit of
a Standard Model Higgs boson with M_H=170 GeV.
|
[{'version': 'v1', 'created': 'Fri, 21 Nov 2008 03:19:05 GMT'}
{'version': 'v2', 'created': 'Tue, 20 Jan 2009 19:07:04 GMT'}]
|
2010-01-15
|
[array(['Anastasiou', 'Charalampos', ''], dtype=object)
array(['Boughezal', 'Radja', ''], dtype=object)
array(['Petriello', 'Frank', ''], dtype=object)]
|
16,872 |
2109.09714
|
Soheb Mandhai
|
S. Mandhai, G. P. Lamb, N. R. Tanvir, J. Bray, C. J. Nixon, R. A. J.
Eyles-Ferris, A. J. Levan, B. P. Gompertz
|
Exploring compact binary merger host galaxies and environments with
$\rm{zELDA}$
|
Accepted for publication in MNRAS, 21 Pages (6 Tables, 14 Figures),
14 Pages Appendix (4 Tables, 16 Figures)
|
Monthly Notices of the Royal Astronomical Society, Volume 514,
Issue 2, August 2022, Pages 2716-2735
|
10.1093/mnras/stac1473
| null |
astro-ph.HE
|
http://creativecommons.org/licenses/by/4.0/
|
Compact binaries such as double neutron stars or a neutron star paired with a
black-hole, are strong sources of gravitational waves during coalescence and
also the likely progenitors of various electromagnetic phenomena, notably
short-duration gamma-ray bursts (SGRBs), and kilonovae. In this work, we
generate populations of synthetic binaries and place them in galaxies from the
large-scale hydrodynamical galaxy evolution simulation EAGLE. With our zELDA
code, binaries are seeded in proportion to star formation rate, and we follow
their evolution to merger using both the BPASS and COSMIC binary stellar
evolution codes. We track their dynamical evolution within their host galaxy
potential, to estimate the galactocentric distance at the time of the merger.
Finally, we apply observational selection criteria to allow comparison of this
model population with the legacy sample of SGRBs. We find a reasonable
agreement with the redshift distribution (peaking at $0.5<z<1$), host
morphologies and projected galactocentric offsets (modal impact parameter
$\lesssim10$ kpc). Depending on the binary simulation used, we predict
$\sim16-35\%$ of SGRB events would appear "host-less", i.e. sources that merge
with high impact parameters or have hosts fainter than the detection limit
($H>26$).
|
[{'version': 'v1', 'created': 'Mon, 20 Sep 2021 17:37:29 GMT'}
{'version': 'v2', 'created': 'Thu, 30 Jun 2022 17:23:48 GMT'}]
|
2022-07-01
|
[array(['Mandhai', 'S.', ''], dtype=object)
array(['Lamb', 'G. P.', ''], dtype=object)
array(['Tanvir', 'N. R.', ''], dtype=object)
array(['Bray', 'J.', ''], dtype=object)
array(['Nixon', 'C. J.', ''], dtype=object)
array(['Eyles-Ferris', 'R. A. J.', ''], dtype=object)
array(['Levan', 'A. J.', ''], dtype=object)
array(['Gompertz', 'B. P.', ''], dtype=object)]
|
16,873 |
2104.09016
|
Takashi Okamoto
|
Yasuyoshi Yamamoto (1), Takashi Okamoto (1), Takayuki R. Saitoh (2 and
3) ((1) Hokkaido University, (2) Kobe University, (3) ELSI)
|
Testing the effect of resolution on gravitational fragmentation with
Lagrangian hydrodynamic schemes
|
11 pages, 11 figures, accepted for publication in MNRAS. The typos in
the authors' names have been corrected
| null |
10.1093/mnras/stab1095
| null |
astro-ph.IM
|
http://creativecommons.org/licenses/by/4.0/
|
To study the resolution required for simulating gravitational fragmentation
with newly developed Lagrangian hydrodynamic schemes, Meshless Finite Volume
method (MFV) and Meshless Finite Mass method (MFM), we have performed a number
of simulations of the Jeans test and compared the results with both the
expected analytic solution and results from the more standard Lagrangian
approach: Smoothed Particle Hydrodynamics (SPH). We find that the different
schemes converge to the analytic solution when the diameter of a fluid element
is smaller than a quarter of the Jeans wavelength, $\lambda_\mathrm{J}$. Among
the three schemes, SPH/MFV shows the fastest/slowest convergence to the
analytic solution. Unlike the well-known behaviour of Eulerian schemes, none of
the Lagrangian schemes investigated displays artificial fragmentation when the
perturbation wavelength, $\lambda$, is shorter than $\lambda_\mathrm{J}$, even
at low numerical resolution. For larger wavelengths ($\lambda >
\lambda_\mathrm{J}$) the growth of the perturbation is delayed when it is not
well resolved. Furthermore, with poor resolution, the fragmentation seen with
the MFV scheme proceeds very differently compared to the converged solution.
All these results suggest that, when unresolved, the ratio of the magnitude of
hydrodynamic force to that of self-gravity at the sub-resolution scale is the
largest/smallest in MFV/SPH, the reasons for which we discussed in detail.
These tests are repeated to investigate the effect of kernels of higher-order
than the fiducial cubic spline. Our results indicate that the standard
deviation of the kernel is a more appropriate definition of the size of a fluid
element than its compact support radius.
|
[{'version': 'v1', 'created': 'Mon, 19 Apr 2021 02:16:47 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Apr 2021 03:18:43 GMT'}]
|
2021-04-28
|
[array(['Yamamoto', 'Yasuyoshi', '', 'Hokkaido University'], dtype=object)
array(['Okamoto', 'Takashi', '', 'Hokkaido University'], dtype=object)
array(['Saitoh', 'Takayuki R.', '', '2 and\n 3'], dtype=object)]
|
16,874 |
2303.07934
|
Jean-Christophe Pain
|
Jean-Christophe Pain
|
A prime sum involving Bernoulli numbers
| null | null | null | null |
math.HO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this note, we propose simple summations for primes, which involve two
finite nested sums and Bernoulli numbers. The summations can also be expressed
in terms of Bernoulli polynomials.
|
[{'version': 'v1', 'created': 'Tue, 14 Mar 2023 14:18:58 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Mar 2023 22:19:01 GMT'}]
|
2023-03-20
|
[array(['Pain', 'Jean-Christophe', ''], dtype=object)]
|
16,875 |
1404.4956
|
Thierry Mora
|
Yuval Elhanati, Anand Murugan, Curtis G. Callan Jr., Thierry Mora,
Aleksandra M. Walczak
|
Quantifying selection in immune receptor repertoires
| null |
Proc Natl Acad Sci USA 111(27) 9875-9880 (2014)
|
10.1073/pnas.1409572111
| null |
q-bio.PE cond-mat.dis-nn q-bio.GN q-bio.QM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The efficient recognition of pathogens by the adaptive immune system relies
on the diversity of receptors displayed at the surface of immune cells. T-cell
receptor diversity results from an initial random DNA editing process, called
VDJ recombination, followed by functional selection of cells according to the
interaction of their surface receptors with self and foreign antigenic
peptides. To quantify the effect of selection on the highly variable elements
of the receptor, we apply a probabilistic maximum likelihood approach to the
analysis of high-throughput sequence data from the $\beta$-chain of human
T-cell receptors. We quantify selection factors for V and J gene choice, and
for the length and amino-acid composition of the variable region. Our approach
is necessary to disentangle the effects of selection from biases inherent in
the recombination process. Inferred selection factors differ little between
donors, or between naive and memory repertoires. The number of sequences shared
between donors is well-predicted by the model, indicating a purely stochastic
origin of such "public" sequences. We find a significant correlation between
biases induced by VDJ recombination and our inferred selection factors,
together with a reduction of diversity during selection. Both effects suggest
that natural selection acting on the recombination process has anticipated the
selection pressures experienced during somatic evolution.
|
[{'version': 'v1', 'created': 'Sat, 19 Apr 2014 14:07:40 GMT'}]
|
2015-04-28
|
[array(['Elhanati', 'Yuval', ''], dtype=object)
array(['Murugan', 'Anand', ''], dtype=object)
array(['Callan', 'Curtis G.', 'Jr.'], dtype=object)
array(['Mora', 'Thierry', ''], dtype=object)
array(['Walczak', 'Aleksandra M.', ''], dtype=object)]
|
16,876 |
1702.04437
|
A. Bashir
|
R. Bermudez, L. Albino, L.X. Guti\'errez-Guerrero, M.E.
Tejeda-Yeomans, A. Bashir
|
Quark-gluon Vertex: A Perturbation Theory Primer and Beyond
|
14 pages, 11 figures
| null |
10.1103/PhysRevD.95.034041
| null |
hep-ph hep-th nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There has been growing evidence that the infrared enhancement of the form
factors defining the full quark-gluon vertex plays an important role in
realizing a dynamical breakdown of chiral symmetry in quantum chromodynamics,
leading to the observed spectrum and properties of hadrons. Both the lattice
and the Schwinger-Dyson communities have begun to calculate these form factors
in various kinematical regimes of momenta involved. A natural consistency check
for these studies is that they should match onto the perturbative predictions
in the ultraviolet, where non-perturbative effects mellow down. In this
article, we carry out a numerical analysis of the one-loop result for all the
form factors of the quark-gluon vertex. Interestingly, even the one-loop
results qualitatively encode most of the infrared enhancement features expected
of their non-perturbative counter parts. We analyze various kinematical
configurations of momenta: symmetric, on-shell and asymptotic. The on-shell
limit enables us to compute anomalous chromomagnetic moment of quarks. The
asymptotic results have implications for the multiplicative renormalizability
of the quark propagator and its connection with the Landau-Khalatnikov-Fradkin
transformations, allowing us to analyze and compare various Ans$\ddot{a}$tze
proposed so far.
|
[{'version': 'v1', 'created': 'Wed, 15 Feb 2017 01:32:40 GMT'}]
|
2017-04-05
|
[array(['Bermudez', 'R.', ''], dtype=object)
array(['Albino', 'L.', ''], dtype=object)
array(['Gutiérrez-Guerrero', 'L. X.', ''], dtype=object)
array(['Tejeda-Yeomans', 'M. E.', ''], dtype=object)
array(['Bashir', 'A.', ''], dtype=object)]
|
16,877 |
2306.14310
|
Jungbae Park
|
Jungbae Park, Seungtaek Choi
|
Addressing Cold Start Problem for End-to-end Automatic Speech Scoring
|
Accepted at Interspeech 2023, 4 pages, 1 page for reference
| null | null | null |
cs.CL cs.SD eess.AS
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Integrating automatic speech scoring/assessment systems has become a critical
aspect of second-language speaking education. With self-supervised learning
advancements, end-to-end speech scoring approaches have exhibited promising
results. However, this study highlights the significant decrease in the
performance of speech scoring systems in new question contexts, thereby
identifying this as a cold start problem in terms of items. With the finding of
cold-start phenomena, this paper seeks to alleviate the problem by following
methods: 1) prompt embeddings, 2) question context embeddings using BERT or
CLIP models, and 3) choice of the pretrained acoustic model. Experiments are
conducted on TOEIC speaking test datasets collected from
English-as-a-second-language (ESL) learners rated by professional TOEIC
speaking evaluators. The results demonstrate that the proposed framework not
only exhibits robustness in a cold-start environment but also outperforms the
baselines for known content.
|
[{'version': 'v1', 'created': 'Sun, 25 Jun 2023 18:48:21 GMT'}]
|
2023-06-27
|
[array(['Park', 'Jungbae', ''], dtype=object)
array(['Choi', 'Seungtaek', ''], dtype=object)]
|
16,878 |
1507.02333
|
Alejandro N\'u\~nez
|
Alejandro N\'u\~nez, Marcel A. Ag\"ueros, Kevin R. Covey, Joel D.
Hartman, Adam L. Kraus, Emily C. Bowsher, Stephanie T. Douglas, Mercedes
L\'opez-Morales, David A. Pooley, Bettina Posselt, Steven H. Saar, Andrew A.
West
|
Linking Stellar Coronal Activity and Rotation at 500 Myr: A Deep Chandra
Observation of M37
|
21 pages, 22 figures, 8 tables, 2 machine-readable tables (MRT)
|
The Astrophysical Journal, 809, Issue 2, 161N (2015)
|
10.1088/0004-637X/809/2/161
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Empirical calibrations of the stellar age-rotation-activity relation (ARAR)
rely on observations of the co-eval populations of stars in open clusters. We
used the Chandra X-ray Observatory to study M37, a 500-Myr-old open cluster
that has been extensively surveyed for rotation periods ($P_{\rm rot}$). M37
was observed almost continuously for five days, for a total of 440.5 ksec, to
measure stellar X-ray luminosities ($L_{\mathrm{X}}$), a proxy for coronal
activity, across a wide range of masses. The cluster's membership catalog was
revisited to calculate updated membership probabilities from photometric data
and each star's distance to the cluster center. The result is a comprehensive
sample of 1699 M37 members: 426 with $P_{\rm rot}$, 278 with X-ray detections,
and 76 with both. We calculate Rossby numbers, $R_o = P_{\rm rot}/\tau$, where
$\tau$ is the convective turnover time, and ratios of the X-ray-to-bolometric
luminosity, $L_{\rm X}/L_{\rm bol}$, to minimize mass dependencies in our
characterization of the rotation-coronal activity relation at 500 Myr. We find
that fast rotators, for which $R_o<0.09\pm0.01$, show saturated levels of
activity, with log($L_{\rm X}/L_{\rm bol}$)$=-3.06\pm0.04$. For
$R_o\geq0.09\pm0.01$, activity is unsaturated and follows a power law of the
form $R_o^\beta$, where $\beta$=$-2.03_{-0.14}^{+0.17}$. This is the largest
sample available for analyzing the dependence of coronal emission on rotation
for a single-aged population, covering stellar masses in the range 0.4$-$1.3
$M_{\odot}$, $P_{\rm rot}$ in the range 0.4$-$12.8 d, and $L_{\rm X}$ in the
range 10$^{28.4-30.5}$ erg s$^{-1}$. Our results make M37 a new benchmark open
cluster for calibrating the ARAR at ages of $\approx$500 Myr.
|
[{'version': 'v1', 'created': 'Wed, 8 Jul 2015 23:04:14 GMT'}
{'version': 'v2', 'created': 'Sat, 29 Oct 2016 04:18:24 GMT'}]
|
2016-11-01
|
[array(['Núñez', 'Alejandro', ''], dtype=object)
array(['Agüeros', 'Marcel A.', ''], dtype=object)
array(['Covey', 'Kevin R.', ''], dtype=object)
array(['Hartman', 'Joel D.', ''], dtype=object)
array(['Kraus', 'Adam L.', ''], dtype=object)
array(['Bowsher', 'Emily C.', ''], dtype=object)
array(['Douglas', 'Stephanie T.', ''], dtype=object)
array(['López-Morales', 'Mercedes', ''], dtype=object)
array(['Pooley', 'David A.', ''], dtype=object)
array(['Posselt', 'Bettina', ''], dtype=object)
array(['Saar', 'Steven H.', ''], dtype=object)
array(['West', 'Andrew A.', ''], dtype=object)]
|
16,879 |
1510.07211
|
Lili Mou
|
Lili Mou, Rui Men, Ge Li, Lu Zhang, Zhi Jin
|
On End-to-End Program Generation from User Intention by Deep Neural
Networks
|
Submitted to 2016 International Conference of Software Engineering
"Vision of 2025 and Beyond" track
| null | null | null |
cs.SE cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper envisions an end-to-end program generation scenario using
recurrent neural networks (RNNs): Users can express their intention in natural
language; an RNN then automatically generates corresponding code in a
characterby-by-character fashion. We demonstrate its feasibility through a case
study and empirical analysis. To fully make such technique useful in practice,
we also point out several cross-disciplinary challenges, including modeling
user intention, providing datasets, improving model architectures, etc.
Although much long-term research shall be addressed in this new field, we
believe end-to-end program generation would become a reality in future decades,
and we are looking forward to its practice.
|
[{'version': 'v1', 'created': 'Sun, 25 Oct 2015 06:52:45 GMT'}]
|
2015-10-27
|
[array(['Mou', 'Lili', ''], dtype=object)
array(['Men', 'Rui', ''], dtype=object)
array(['Li', 'Ge', ''], dtype=object)
array(['Zhang', 'Lu', ''], dtype=object)
array(['Jin', 'Zhi', ''], dtype=object)]
|
16,880 |
2303.08534
|
Keith R. Dienes
|
Steven Abel, Keith R. Dienes, Luca A. Nutricati
|
On the Running of Gauge Couplings in String Theory
|
37 pages, LaTeX, 5 figures
| null |
10.1103/PhysRevD.107.126019
|
CERN-TH-2023-044, IPPP/23/16
|
hep-th hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we conduct a general, model-independent analysis of the running
of gauge couplings within closed string theories. Unlike previous discussions
in the literature, our calculations fully respect the underlying modular
invariance of the string and include the contributions from the infinite towers
of string states which are ultimately responsible for many of the properties
for which string theory is famous, including an enhanced degree of finiteness
and UV/IR mixing. In order to perform our calculations, we adopt a formalism
that was recently developed for calculations of the Higgs mass within such
theories, and demonstrate that this formalism can also be applied to
calculations of gauge couplings. In general, this formalism gives rise to an
``on-shell'' effective field theory (EFT) description in which the final
results are expressed in terms of supertraces over the physical string states,
and in which these quantities exhibit an EFT-like ``running'' as a function of
an effective spacetime mass scale. We find, however, that the calculation of
the gauge couplings differs in one deep way from that of the Higgs mass: while
the latter results depend on purely on-shell supertraces, the former results
have a different modular structure which causes them to depend on off-shell
supertraces as well. In some regions of parameter space, our results
demonstrate how certain expected field-theoretic behaviors can emerge from the
highly UV/IR-mixed environment. In other situations, by contrast, our results
give rise to a number of intrinsically stringy behaviors that transcend what
might be expected within an effective field theory approach.
|
[{'version': 'v1', 'created': 'Wed, 15 Mar 2023 11:27:01 GMT'}]
|
2023-07-05
|
[array(['Abel', 'Steven', ''], dtype=object)
array(['Dienes', 'Keith R.', ''], dtype=object)
array(['Nutricati', 'Luca A.', ''], dtype=object)]
|
16,881 |
1404.6121
|
Suresh K. Shukla
|
Suresh K. Shukla and M. K. Gupta
|
Killing Correspondence in Finsler Spaces
| null | null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The present paper deals with the Killing correspondence between some Finsler
spaces. We consider a Finsler space equipped with a $\beta$-change of metric
and study the Killing correspondence between the original Finsler space and the
Finsler space equipped with $\beta$-change of metric. We obtain necessary and
sufficient condition for a vector field Killing in the original Finsler space
to be Killing in the Finsler space equipped with $\beta$-change of metric.
Certain consequences of such result are also discussed.
|
[{'version': 'v1', 'created': 'Thu, 24 Apr 2014 13:47:08 GMT'}]
|
2014-04-25
|
[array(['Shukla', 'Suresh K.', ''], dtype=object)
array(['Gupta', 'M. K.', ''], dtype=object)]
|
16,882 |
1703.03432
|
Jean-Stephane Bailly
|
Mohammad El Hajj (UMR TETIS), Nicolas Baghdadi (UMR TETIS), Ibrahim
Fayad (UMR TETIS), Ghislain Vieilledent (CIRAD, JRC), Jean-St\'ephane Bailly
(LISAH), Dinh Ho Tong Minh (UMR TETIS)
|
Interest of Integrating Spaceborne LiDAR Data to Improve the Estimation
of Biomass in High Biomass Forested Areas
| null |
Remote Sensing, MDPI, 2017, 9, pp.213 - 213
|
10.3390/rs9030213
| null |
q-bio.OT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Mapping forest AGB (Above Ground Biomass) is of crucial importance to
estimate the carbon emissions associated with tropical deforestation. This
study proposes a method to overcome the saturation at high AGB values of
existing AGB map (Vieilledent's AGB map) by using a map of correction factors
generated from GLAS (Geoscience Laser Altimeter System) spaceborne LiDAR data.
The Vieilledent's AGB map of Madagascar was established using optical images,
with parameters calculated from the SRTM Digital Elevation Model, climatic
variables, and field inventories. In the present study, first, GLAS LiDAR data
were used to obtain a spatially distributed (GLAS footprints geolocation)
estimation of AGB (GLAS AGB) covering Madagascar forested areas, with a density
of 0.52 footprint/km 2. Second, the difference between the AGB from the
Vieilledent's AGB map and GLAS AGB at each GLAS footprint location was
calculated, and additional spatially distributed correction factors were
obtained. Third, an ordinary kriging interpolation was thus performed by taking
into account the spatial structure of these additional correction factors to
provide a continuous correction factor map. Finally, the existing and the
correction factor maps were summed to improve the Vieilledent's AGB map. The
results showed that the integration of GLAS data improves the precision of
Vieilledent's AGB map by approximately 7 t/ha. By integrating GLAS data, the
RMSE on AGB estimates decreases from 81 t/ha (R 2 = 0.62) to 74.1 t/ha (R 2 =
0.71). Most importantly, we showed that this approach using LiDAR data avoids
underestimating high biomass values (new maximum AGB of 650 t/ha compared to
550 t/ha with the first approach).
|
[{'version': 'v1', 'created': 'Tue, 7 Mar 2017 10:24:04 GMT'}]
|
2017-03-13
|
[array(['Hajj', 'Mohammad El', '', 'UMR TETIS'], dtype=object)
array(['Baghdadi', 'Nicolas', '', 'UMR TETIS'], dtype=object)
array(['Fayad', 'Ibrahim', '', 'UMR TETIS'], dtype=object)
array(['Vieilledent', 'Ghislain', '', 'CIRAD, JRC'], dtype=object)
array(['Bailly', 'Jean-Stéphane', '', 'LISAH'], dtype=object)
array(['Minh', 'Dinh Ho Tong', '', 'UMR TETIS'], dtype=object)]
|
16,883 |
1107.1996
|
Rodrigo L\'opez Pouso
|
Rodrigo L\'opez Pouso
|
Existence and computation of Riemann-Stieltjes integrals through Riemann
integrals
| null | null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the existence of Riemann-Stieltjes integrals of bounded functions
against a given integrator. We are also concerned with the possibility of
computing the resulting integrals by means of related Riemann integrals. In
particular, we present a new generalization to the well-known formula for
continuous integrands and continuously differentiable integrators.
|
[{'version': 'v1', 'created': 'Mon, 11 Jul 2011 11:14:51 GMT'}]
|
2011-07-12
|
[array(['Pouso', 'Rodrigo López', ''], dtype=object)]
|
16,884 |
1911.01962
|
Markus Hansen
|
Stephan Dahlke, Markus Hansen, Cornelia Schneider and Winfried Sickel
|
Properties of Kondratiev spaces
|
54 pages
| null | null | null |
math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we investigate Kondratiev spaces on domains of polyhedral
type. In particular, we will be concerned with necessary and sufficient
conditions for continuous and compact embeddings, and in addition we shall deal
with pointwise multiplication in these spaces.
|
[{'version': 'v1', 'created': 'Tue, 5 Nov 2019 17:41:06 GMT'}]
|
2019-11-06
|
[array(['Dahlke', 'Stephan', ''], dtype=object)
array(['Hansen', 'Markus', ''], dtype=object)
array(['Schneider', 'Cornelia', ''], dtype=object)
array(['Sickel', 'Winfried', ''], dtype=object)]
|
16,885 |
cond-mat/9802141
|
Igor Herbut
|
Igor F. Herbut (University of British Columbia)
|
Critical behavior at superconductor-insulator phase transitions near one
dimension
|
23 pages, 1 Postscript figure, LaTex
|
Physical Review B, vol. 58, p. 971 (1998)
|
10.1103/PhysRevB.58.971
| null |
cond-mat.supr-con
| null |
I argue that the system of interacting bosons at zero temperature and in
random external potential possesses a simple critical point which describes the
proliferation of disorder-induced topological defects in the superfluid ground
state, and which is located at weak disorder close to and above one dimension.
This makes it possible to address the critical behavior at the superfluid-Bose
glass transition in dirty boson systems by expanding around the lower critical
dimension d=1. Within the formulated renormalization procedure near d=1 the
dynamical critical exponent is obtained exactly and the correlation length
exponent is calculated as a Laurent series in the parameter \sqrt{\epsilon},
with \epsilon=d-1: z=d, \nu=1/\sqrt{3\epsilon} for the short range, and z=1,
\nu=\sqrt{2/3\epsilon}, for the long-range Coulomb interaction between bosons.
The identified critical point should be stable against the residual
perturbations in the effective action for the superfluid, at least in
dimensions 1\leq d \leq 2, for both short-range and Coulomb interactions. For
the superfluid-Mott insulator transition in the system in a periodic potential
and at a commensurate density of bosons I find \nu=(1/2\sqrt{\epsilon})+
1/4+O(\sqrt{\epsilon}), which yields a result reasonably close to the known XY
critical exponent in d=2+1. The critical behavior of the superfluid density,
phonon velocity and the compressibility in the system with the short-range
interactions is discussed.
|
[{'version': 'v1', 'created': 'Thu, 12 Feb 1998 21:59:10 GMT'}]
|
2009-10-31
|
[array(['Herbut', 'Igor F.', '', 'University of British Columbia'],
dtype=object) ]
|
16,886 |
2108.09079
|
Qiaosi Yi
|
Qiaosi Yi, Juncheng Li, Qinyan Dai, Faming Fang, Guixu Zhang, and
Tieyong Zeng
|
Structure-Preserving Deraining with Residue Channel Prior Guidance
| null | null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Single image deraining is important for many high-level computer vision tasks
since the rain streaks can severely degrade the visibility of images, thereby
affecting the recognition and analysis of the image. Recently, many CNN-based
methods have been proposed for rain removal. Although these methods can remove
part of the rain streaks, it is difficult for them to adapt to real-world
scenarios and restore high-quality rain-free images with clear and accurate
structures. To solve this problem, we propose a Structure-Preserving Deraining
Network (SPDNet) with RCP guidance. SPDNet directly generates high-quality
rain-free images with clear and accurate structures under the guidance of RCP
but does not rely on any rain-generating assumptions. Specifically, we found
that the RCP of images contains more accurate structural information than rainy
images. Therefore, we introduced it to our deraining network to protect
structure information of the rain-free image. Meanwhile, a Wavelet-based
Multi-Level Module (WMLM) is proposed as the backbone for learning the
background information of rainy images and an Interactive Fusion Module (IFM)
is designed to make full use of RCP information. In addition, an iterative
guidance strategy is proposed to gradually improve the accuracy of RCP,
refining the result in a progressive path. Extensive experimental results on
both synthetic and real-world datasets demonstrate that the proposed model
achieves new state-of-the-art results. Code: https://github.com/Joyies/SPDNet
|
[{'version': 'v1', 'created': 'Fri, 20 Aug 2021 09:09:56 GMT'}]
|
2021-08-23
|
[array(['Yi', 'Qiaosi', ''], dtype=object)
array(['Li', 'Juncheng', ''], dtype=object)
array(['Dai', 'Qinyan', ''], dtype=object)
array(['Fang', 'Faming', ''], dtype=object)
array(['Zhang', 'Guixu', ''], dtype=object)
array(['Zeng', 'Tieyong', ''], dtype=object)]
|
16,887 |
hep-th/0110217
|
Klaus Kirsten
|
M. Bordag and K. Kirsten
|
Heat kernel Coefficients and Divergencies of the Casimir Energy for the
Dispersive Sphere
|
8 pages, Contribution to the 5th Workshop on Quantum Field Theory
under the Influence of External Conditions, Leipzig, Germany, 10-14 Sep 2001
|
Int.J.Mod.Phys.A17:813-819,2002
|
10.1142/S0217751X02010170
| null |
hep-th
| null |
The first heat kernel coefficients are calculated for a dispersive ball whose
permittivity at high frequency differs from unity by inverse powers of the
frequency. The corresponding divergent part of the vacuum energy of the
electromagnetic field is given and ultraviolet divergencies are seen to be
present. Also in a model where the number of atoms is fixed the pressure
exhibits infinities. As a consequence, the ground-state energy for a dispersive
dielectric ball cannot be interpreted easily.
|
[{'version': 'v1', 'created': 'Wed, 24 Oct 2001 08:54:34 GMT'}]
|
2008-11-26
|
[array(['Bordag', 'M.', ''], dtype=object)
array(['Kirsten', 'K.', ''], dtype=object)]
|
16,888 |
1309.6731
|
Balazs Patkos
|
Tam\'as H\'eger, Bal\'azs Patk\'os, Marcella Tak\'ats
|
Search Problems in Vector Spaces
| null | null |
10.1007/s10623-014-9941-9
| null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the following $q$-analog of the basic combinatorial search
problem: let $q$ be a prime power and $\GF(q)$ the finite field of $q$
elements. Let $V$ denote an $n$-dimensional vector space over $\GF(q)$ and let
$\mathbf{v}$ be an unknown 1-dimensional subspace of $V$. We will be interested
in determining the minimum number of queries that is needed to find
$\mathbf{v}$ provided all queries are subspaces of $V$ and the answer to a
query $U$ is YES if $\mathbf{v} \leqslant U$ and NO if $\mathbf{v}
\not\leqslant U$. This number will be denoted by $A(n,q)$ in the adaptive case
(when for each queries answers are obtained immediately and later queries might
depend on previous answers) and $M(n,q)$ in the non-adaptive case (when all
queries must be made in advance).
In the case $n=3$ we prove $2q-1=A(3,q)<M(3,q)$ if $q$ is large enough. While
for general values of $n$ and $q$ we establish the bounds \[ n\log q \le A(n,q)
\le (1+o(1))nq \] and \[ (1-o(1))nq \le M(n,q) \le 2nq, \] provided $q$ tends
to infinity.
|
[{'version': 'v1', 'created': 'Thu, 26 Sep 2013 06:42:13 GMT'}
{'version': 'v2', 'created': 'Thu, 30 Jan 2014 15:54:27 GMT'}]
|
2014-03-12
|
[array(['Héger', 'Tamás', ''], dtype=object)
array(['Patkós', 'Balázs', ''], dtype=object)
array(['Takáts', 'Marcella', ''], dtype=object)]
|
16,889 |
1408.0147
|
Kun Liu
|
Kun Liu, Emilia Fridman, Laurentiu Hetel
|
Networked control systems in the presence of scheduling protocols and
communication delays
| null | null | null | null |
cs.SY math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper develops the time-delay approach to Networked Control Systems
(NCSs) in the presence of variable transmission delays, sampling intervals and
communication constraints. The system sensor nodes are supposed to be
distributed over a network. Due to communication constraints only one node
output is transmitted through the communication channel at once. The scheduling
of sensor information towards the controller is ruled by a weighted
Try-Once-Discard (TOD) or by Round-Robin (RR) protocols. Differently from the
existing results on NCSs in the presence of scheduling protocols (in the
frameworks of hybrid and discrete-time systems), we allow the communication
delays to be greater than the sampling intervals. A novel hybrid system model
for the closed-loop system is presented that contains {\it time-varying delays
in the continuous dynamics and in the reset conditions}. A new
Lyapunov-Krasovskii method, which is based on discontinuous in time Lyapunov
functionals is introduced for the stability analysis of the delayed hybrid
systems. Polytopic type uncertainties in the system model can be easily
included in the analysis. The efficiency of the time-delay approach is
illustrated on the examples of uncertain cart-pendulum and of batch reactor.
|
[{'version': 'v1', 'created': 'Fri, 1 Aug 2014 12:09:47 GMT'}]
|
2014-08-04
|
[array(['Liu', 'Kun', ''], dtype=object)
array(['Fridman', 'Emilia', ''], dtype=object)
array(['Hetel', 'Laurentiu', ''], dtype=object)]
|
16,890 |
2107.08529
|
Min Tsao Dr.
|
Min Tsao
|
Regression model selection via log-likelihood ratio and constrained
minimum criterion
|
23 pages
| null | null | null |
stat.ME math.ST stat.TH
|
http://creativecommons.org/licenses/by/4.0/
|
Although the log-likelihood is widely used in model selection, the
log-likelihood ratio has had few applications in this area. We develop a
log-likelihood ratio based method for selecting regression models by focusing
on the set of models deemed plausible by the likelihood ratio test. We show
that when the sample size is large and the significance level of the test is
small, there is a high probability that the smallest model in the set is the
true model; thus, we select this smallest model. The significance level of the
test serves as a parameter for this method. We consider three levels of this
parameter in a simulation study and compare this method with the Akaike
Information Criterion and Bayesian Information Criterion to demonstrate its
excellent accuracy and adaptability to different sample sizes. We also apply
this method to select a logistic regression model for a South African heart
disease dataset.
|
[{'version': 'v1', 'created': 'Sun, 18 Jul 2021 19:59:24 GMT'}
{'version': 'v2', 'created': 'Sat, 25 Sep 2021 04:30:59 GMT'}]
|
2021-09-28
|
[array(['Tsao', 'Min', ''], dtype=object)]
|
16,891 |
1111.3627
|
Sebastiaan Vlaming
|
Sebastiaan M. Vlaming and Robert J. Silbey
|
Correlated interaction fluctuations in photosynthetic complexes
| null | null |
10.1063/1.3682988
| null |
physics.bio-ph physics.chem-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The functioning and efficiency of natural photosynthetic complexes is
strongly influenced by their embedding in a noisy protein environment, which
can even serve to enhance the transport efficiency. Interactions with the
environment induce fluctuations of the transition energies of and interactions
between the chlorophyll molecules, and due to the fact that different
fluctuations will partially be caused by the same environmental factors,
correlations between the various fluctuations will occur. We argue that
fluctuations of the interactions should in general not be neglected, as these
have a considerable impact on population transfer rates, decoherence rates and
the efficiency of photosynthetic complexes. Furthermore, while correlations
between transition energy fluctuations have been studied, we provide the first
quantitative study of the effect of correlations between interaction
fluctuations and transition energy fluctuations, and of correlations between
the various interaction fluctuations. It is shown that these additional
correlations typically lead to changes in interchromophore transfer rates,
population oscillations and can lead to a limited enhancement of the light
harvesting efficiency.
|
[{'version': 'v1', 'created': 'Tue, 15 Nov 2011 20:27:29 GMT'}]
|
2015-06-03
|
[array(['Vlaming', 'Sebastiaan M.', ''], dtype=object)
array(['Silbey', 'Robert J.', ''], dtype=object)]
|
16,892 |
1311.4570
|
Pedro Neto
|
Diogo Mariano Neto, Pedro Neto
|
Numerical modeling of friction stir welding process: a literature review
|
The International Journal of Advanced Manufacturing Technology
|
Volume 65, 2013 , pp 115-126
|
10.1007/s00170-012-4154-8
| null |
cs.CE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This survey presents a literature review on friction stir welding (FSW)
modeling with a special focus on the heat generation due to the contact
conditions between the FSW tool and the workpiece. The physical process is
described and the main process parameters that are relevant to its modeling are
highlighted. The contact conditions (sliding/sticking) are presented as well as
an analytical model that allows estimating the associated heat generation. The
modeling of the FSW process requires the knowledge of the heat loss mechanisms,
which are discussed mainly considering the more commonly adopted formulations.
Different approaches that have been used to investigate the material flow are
presented and their advantages/drawbacks are discussed. A reliable FSW process
modeling depends on the fine tuning of some process and material parameters.
Usually, these parameters are achieved with base on experimental data. The
numerical modeling of the FSW process can help to achieve such parameters with
less effort and with economic advantages.
|
[{'version': 'v1', 'created': 'Mon, 18 Nov 2013 22:10:14 GMT'}]
|
2013-11-20
|
[array(['Neto', 'Diogo Mariano', ''], dtype=object)
array(['Neto', 'Pedro', ''], dtype=object)]
|
16,893 |
hep-ph/0508005
|
Marta Ruspa
|
X. Janssen, M. Ruspa, V.A. Khoze
|
Summary of the "Diffraction & Vector Mesons" working group at DIS05
|
21 pages, 27 figures, DIS05 conference proceedings
| null |
10.1063/1.2122018
| null |
hep-ph
| null |
We survey the contributions presented in the working group "Diffraction &
Vector Mesons" at the XIII International Workshop on Deep Inelastic Scattering
(http://www.hep.wisc.edu/dis05)
|
[{'version': 'v1', 'created': 'Mon, 1 Aug 2005 09:01:00 GMT'}]
|
2015-06-25
|
[array(['Janssen', 'X.', ''], dtype=object)
array(['Ruspa', 'M.', ''], dtype=object)
array(['Khoze', 'V. A.', ''], dtype=object)]
|
16,894 |
1608.05960
|
Ling-Han Zhang
|
Ling-Han Zhang, Chi-Hang Lam
|
Emergent facilitation behavior in a distinguishable-particle lattice
model of glass
| null |
Phys. Rev. B 95, 184202 (2017)
|
10.1103/PhysRevB.95.184202
| null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose an interacting lattice gas model of structural glass characterized
by particle distinguishability and site-particle-dependent random
nearest-neighboring particle interactions. This incorporates disorder quenched
in the configuration space rather than in the physical space. The model
exhibits non-trivial energetics while still admitting exact equilibrium states
directly constructible at arbitrary temperature and density. The dynamics is
defined by activated hopping following standard kinetic Monte Carlo approach
without explicit facilitation rule. Kinetic simulations show emergent dynamic
facilitation behaviors in the glassy phase in which motions of individual voids
are significant only when accelerated by other voids nearby. This provides a
microscopic justification for the dynamic facilitation picture of structural
glass.
|
[{'version': 'v1', 'created': 'Sun, 21 Aug 2016 16:05:00 GMT'}
{'version': 'v2', 'created': 'Sat, 20 May 2017 16:50:53 GMT'}]
|
2017-05-24
|
[array(['Zhang', 'Ling-Han', ''], dtype=object)
array(['Lam', 'Chi-Hang', ''], dtype=object)]
|
16,895 |
0812.2780
|
Andrew Swann
|
Andrew Swann
|
Twisting Hermitian and hypercomplex geometries
|
27 pages
|
Duke Math. J. 155, no. 2 (2010), 403-431
|
10.1215/00127094-2010-059
|
NORDITA-2008-61; IMADA-PP-2008-16
|
math.DG hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A twist construction for manifolds with torus action is described
generalising certain T-duality examples and constructions in hypercomplex
geometry. It is applied to complex, SKT, hypercomplex and HKT manifolds to
construct compact simply-connected examples. In particular, we find
hypercomplex manifolds that admit no compatible HKT metric, and HKT manifolds
whose Obata connection has holonomy contained in $SL(n,\mathbb H)$.
|
[{'version': 'v1', 'created': 'Mon, 15 Dec 2008 12:13:37 GMT'}]
|
2019-12-19
|
[array(['Swann', 'Andrew', ''], dtype=object)]
|
16,896 |
2205.10537
|
You-Chia Chang
|
Ping-Yen Hsieh, Shun-Lin Fang, Yu-Siang Lin, Wen-Hsien Huang, Jia-Min
Shieh, Peichen Yu, and You-Chia Chang
|
Integrated Metasurfaces on Silicon Photonics for Emission Shaping and
Holographic Projection
| null |
Nanophotonics 11, 4687-4695 (2022)
|
10.1515/nanoph-2022-0344
| null |
physics.optics physics.app-ph
|
http://creativecommons.org/licenses/by/4.0/
|
The emerging applications of silicon photonics in free space, such as LiDARs
and quantum photonics, urge versatile emission shaping beyond the capabilities
of conventional grating couplers. A platform that offers arbitrary shaping of
free-space emission while maintaining the CMOS compatibility and monolithic
integration is in pressing need. Here we demonstrate a platform that integrates
metasurfaces monolithically on silicon photonic integrated circuits. The
metasurfaces consist of amorphous silicon nanopillars evanescently coupled to
silicon waveguides. We demonstrate experimentally diffraction-limited beam
focusing with a Strehl ratio of 0.82, where the focused spot can be switched
between two positions. We also realize a meta-hologram experimentally that
projects an image above the silicon photonic chip. This platform can add a
highly versatile interface to the existing silicon photonic ecosystems for
precise delivery of free-space emission.
|
[{'version': 'v1', 'created': 'Sat, 21 May 2022 08:31:50 GMT'}]
|
2023-01-09
|
[array(['Hsieh', 'Ping-Yen', ''], dtype=object)
array(['Fang', 'Shun-Lin', ''], dtype=object)
array(['Lin', 'Yu-Siang', ''], dtype=object)
array(['Huang', 'Wen-Hsien', ''], dtype=object)
array(['Shieh', 'Jia-Min', ''], dtype=object)
array(['Yu', 'Peichen', ''], dtype=object)
array(['Chang', 'You-Chia', ''], dtype=object)]
|
16,897 |
1711.00399
|
Brent Mittelstadt
|
Sandra Wachter, Brent Mittelstadt, Chris Russell
|
Counterfactual Explanations without Opening the Black Box: Automated
Decisions and the GDPR
| null |
Harvard Journal of Law & Technology, 2018
| null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There has been much discussion of the right to explanation in the EU General
Data Protection Regulation, and its existence, merits, and disadvantages.
Implementing a right to explanation that opens the black box of algorithmic
decision-making faces major legal and technical barriers. Explaining the
functionality of complex algorithmic decision-making systems and their
rationale in specific cases is a technically challenging problem. Some
explanations may offer little meaningful information to data subjects, raising
questions around their value. Explanations of automated decisions need not
hinge on the general public understanding how algorithmic systems function.
Even though such interpretability is of great importance and should be pursued,
explanations can, in principle, be offered without opening the black box.
Looking at explanations as a means to help a data subject act rather than
merely understand, one could gauge the scope and content of explanations
according to the specific goal or action they are intended to support. From the
perspective of individuals affected by automated decision-making, we propose
three aims for explanations: (1) to inform and help the individual understand
why a particular decision was reached, (2) to provide grounds to contest the
decision if the outcome is undesired, and (3) to understand what would need to
change in order to receive a desired result in the future, based on the current
decision-making model. We assess how each of these goals finds support in the
GDPR. We suggest data controllers should offer a particular type of
explanation, unconditional counterfactual explanations, to support these three
aims. These counterfactual explanations describe the smallest change to the
world that can be made to obtain a desirable outcome, or to arrive at the
closest possible world, without needing to explain the internal logic of the
system.
|
[{'version': 'v1', 'created': 'Wed, 1 Nov 2017 15:39:23 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Dec 2017 12:26:47 GMT'}
{'version': 'v3', 'created': 'Wed, 21 Mar 2018 11:43:46 GMT'}]
|
2018-03-22
|
[array(['Wachter', 'Sandra', ''], dtype=object)
array(['Mittelstadt', 'Brent', ''], dtype=object)
array(['Russell', 'Chris', ''], dtype=object)]
|
16,898 |
physics/0111048
|
Rolf Keitel
|
Rolf Keitel
|
Generating EPICS IOC Databases from a Relational Database - a Different
Approach
|
ICALEPCS01 WEAPO71
|
eConf C011127 (2001) WEAP071
| null | null |
physics.acc-ph
| null |
The EPICS based control system of the ISAC radioactive beam facility uses the
CapFast schematic editor to construct the IOC function-block databases. This
allows a self-documenting graphical representation of the IOC software using a
hierarchical, object-like software structure with reusable components. On the
other hand, the control system is quarterbacked by a relational database, which
contains all device information. Using database reports and Perl scripts, a
device instantiation method was developed which generates top-level schematic
files in CapFast format. This method exploits the advantages of device data
entry and reporting using a relational database system while maintaining the
graphical representation of the IOC database.
|
[{'version': 'v1', 'created': 'Fri, 9 Nov 2001 01:02:16 GMT'}]
|
2007-05-23
|
[array(['Keitel', 'Rolf', ''], dtype=object)]
|
16,899 |
cond-mat/9812308
|
Stephen Dugdale
|
E.A. Livesay (1), R.N. West (1), S.B. Dugdale (2,3), G. Santi (3) and
T. Jarlborg (3) ((1) University of Texas at Arlington, (2) University of
Bristol, UK, (3) University of Geneva, Switzerland)
|
Fermi surface of the colossal magnetoresistance perovskite
La_{0.7}Sr_{0.3}MnO_{3}
|
5 pages, 5 PS figures
| null |
10.1088/0953-8984/11/25/104
| null |
cond-mat.str-el
| null |
Materials that exhibit colossal magnetoresistance (CMR) are currently the
focus of an intense research effort, driven by the technological applications
that their sensitivity lends them to. Using the angular correlation of photons
from electron-positron annihilation, we present a first glimpse of the Fermi
surface of a material that exhibits CMR, supported by ``virtual crystal''
electronic structure calculations. The Fermi surface is shown to be
sufficiently cubic in nature that it is likely to support nesting.
|
[{'version': 'v1', 'created': 'Thu, 17 Dec 1998 17:14:41 GMT'}]
|
2009-10-31
|
[array(['Livesay', 'E. A.', ''], dtype=object)
array(['West', 'R. N.', ''], dtype=object)
array(['Dugdale', 'S. B.', ''], dtype=object)
array(['Santi', 'G.', ''], dtype=object)
array(['Jarlborg', 'T.', ''], dtype=object)]
|
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