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Anomaly detection in videos is a significant yet challenging problem.
Previous approaches based on deep neural networks employ either
reconstruction-based or prediction-based approaches. Nevertheless, existing
reconstruction-based methods 1) rely on old-fashioned convolutional
autoencoders and are poor at modeling temp... | http://arxiv.org/abs/2301.12048v1 |
Human speakers can generate descriptions of perceptual concepts, abstracted
from the instance-level. Moreover, such descriptions can be used by other
speakers to learn provisional representations of those concepts. Learning and
using abstract perceptual concepts is under-investigated in the
language-and-vision field. T... | http://arxiv.org/abs/2303.04053v3 |
Optical wireless communication (OWC) offers several complementary advantages
to radio-frequency wireless networks such as its massive available spectrum;
hence, it is widely anticipated that OWC will assume a pivotal role in the
forthcoming sixth generation wireless communication networks. Although
significant progress... | http://arxiv.org/abs/2305.09821v2 |
Physics-informed neural networks (PINNs) have been demonstrated to be
efficient in solving partial differential equations (PDEs) from a variety of
experimental perspectives. Some recent studies have also proposed PINN
algorithms for PDEs on surfaces, including spheres. However, theoretical
understanding of the numerica... | http://arxiv.org/abs/2308.09605v2 |
The possibility to engineer artificial Kitaev chains in arrays of quantum
dots coupled via narrow superconducting regions has emerged as an attractive
way to overcome the disorder issues that complicate the realization and
detection of topological superconducting phases in other platforms. Although a
true topological p... | http://arxiv.org/abs/2306.16289v1 |
In teleparallel geometries the coframe and corresponding spin-connection are
the principal geometric objects and consequently the appropriate definition of
a symmetry is that of an affine symmetry. The set of invariant coframes and
their corresponding spin connections that respect the full six dimensional Lie
algebra o... | http://arxiv.org/abs/2310.14378v1 |
The classification of galaxy morphology is a hot issue in astronomical
research. Although significant progress has been made in the last decade in
classifying galaxy morphology using deep learning technology, there are still
some deficiencies in spatial feature representation and classification
accuracy. In this study,... | http://arxiv.org/abs/2304.10081v1 |
Energy shortfall and electricity load shedding are the main problems for
developing countries. The main causes are lack of management in the energy
sector and the use of non-renewable energy sources. The improved energy
management and use of renewable sources can be significant to resolve energy
crisis. It is necessary... | http://arxiv.org/abs/2307.09080v1 |
One of the primary reasons behind the success of neural networks has been the
emergence of an array of new, highly-successful optimizers, perhaps most
importantly the Adam optimizer. It is widely used for training neural networks,
yet notoriously hard to interpret. Lacking a clear physical intuition, Adam is
difficult ... | http://arxiv.org/abs/2305.16901v3 |
The ability to actively ground task instructions from an egocentric view is
crucial for AI agents to accomplish tasks or assist humans virtually. One
important step towards this goal is to localize and track key active objects
that undergo major state change as a consequence of human actions/interactions
to the environ... | http://arxiv.org/abs/2310.15066v1 |
Quench dynamics of fermionic superfluids are an active topic both
experimentally and theoretically. Using the BCS theory, such non-equilibrium
problems can be reduced to nearly independent spin dynamics, only with a
time-dependent mean-field pairing term. This results in persisting oscillations
of the pairing strength ... | http://arxiv.org/abs/2303.02422v2 |
Background - Startup companies are becoming important suppliers of innovative
and software intensive products. The failure rate among startups is high due to
lack of resources, immaturity, multiple influences and dynamic technologies.
However, software product engineering is the core activity in startups,
therefore ina... | http://arxiv.org/abs/2308.07628v1 |
Early results from the JWST-MIRI guaranteed time programs on protostars
(JOYS) and disks (MINDS) are presented. Thanks to the increased sensitivity,
spectral and spatial resolution of the MIRI spectrometer, the chemical
inventory of the planet-forming zones in disks can be investigated with
unprecedented detail across ... | http://arxiv.org/abs/2307.11817v1 |
Point-to-multi-point (PtMP) optical networks become the main solutions for
network-edge applications such as passive optical networks and radio access
networks. Entropy-loading digital subcarrier multiplexing (DSCM) is the core
technology to achieve low latency and approach high capacity for flexible PtMP
optical netwo... | http://arxiv.org/abs/2310.12709v1 |
Kilonovae are generally believed to originate from the ejecta of binary
neutron stars (NSs) or black hole and NS mergers. Free neutrons might be
retained in the outermost layer of the ejecta to produce a precursor via
$\beta$-decay. During the propagation of kilonovae to observers, a small
percentage of them might be g... | http://arxiv.org/abs/2301.07323v1 |
Despite their immense success in numerous fields, machine and deep learning
systems have not yet been able to firmly establish themselves in
mission-critical applications in healthcare. One of the main reasons lies in
the fact that when models are presented with previously unseen,
Out-of-Distribution samples, their per... | http://arxiv.org/abs/2303.11338v3 |
Recent research has shown that hardware fuzzers can effectively detect
security vulnerabilities in modern processors. However, existing hardware
fuzzers do not fuzz well the hard-to-reach design spaces. Consequently, these
fuzzers cannot effectively fuzz security-critical control- and data-flow logic
in the processors,... | http://arxiv.org/abs/2304.02485v3 |
Machine learning is traditionally studied at the model level: researchers
measure and improve the accuracy, robustness, bias, efficiency, and other
dimensions of specific models. In practice, the societal impact of machine
learning is determined by the surrounding context of machine learning
deployments. To capture thi... | http://arxiv.org/abs/2307.05862v2 |
In this work, we propose a new transformer-based regularization to better
localize objects for Weakly supervised semantic segmentation (WSSS). In
image-level WSSS, Class Activation Map (CAM) is adopted to generate object
localization as pseudo segmentation labels. To address the partial activation
issue of the CAMs, co... | http://arxiv.org/abs/2308.04321v2 |
In this short note we prove an analogue of Auslander correspondence for exact
dg categories whose $H^0$-category is $0$-Auslander in the sense of
Gorsky--Nakaoka--Palu. | http://arxiv.org/abs/2306.15958v2 |
We present here uGMRT band 4 (~650MHz) polarization images of 8 BL~Lac
objects belonging to the Palomar-Green (PG) `blazar' sample. A large fraction
of the sources (~63%) reveal core-halo radio structures with most of the
polarization detected in the inner core-jet regions. PG1101+385 and PG2254+075
exhibit a `spine-sh... | http://arxiv.org/abs/2310.08989v1 |
A novel hack involving Large Language Models (LLMs) has emerged, exploiting
adversarial suffixes to deceive models into generating perilous responses. Such
jailbreaks can trick LLMs into providing intricate instructions to a malicious
user for creating explosives, orchestrating a bank heist, or facilitating the
creatio... | http://arxiv.org/abs/2308.14132v3 |
This paper studies the endemic behavior of a multi-competitive networked
susceptible-infected-susceptible (SIS) model. Specifically, the paper deals
with three competing virus systems (i.e., tri-virus systems). First, we show
that a tri-virus system, unlike a bi-virus system, is not a monotone dynamical
system. Using t... | http://arxiv.org/abs/2303.16457v1 |
In this paper, we investigate a semiparametric regression model under the
context of treatment effects via a localized neural network (LNN) approach. Due
to a vast number of parameters involved, we reduce the number of effective
parameters by (i) exploring the use of identification restrictions; and (ii)
adopting a var... | http://arxiv.org/abs/2306.05593v2 |
We propose a new optimization-based approach for feature selection in tree
ensembles, an important problem in statistics and machine learning. Popular
tree ensemble toolkits e.g., Gradient Boosted Trees and Random Forests support
feature selection post-training based on feature importance scores, while very
popular, th... | http://arxiv.org/abs/2310.18542v2 |
Modeling text-based time-series to make prediction about a future event or
outcome is an important task with a wide range of applications. The standard
approach is to train and test the model using the same input window, but this
approach neglects the data collected in longer input windows between the
prediction time a... | http://arxiv.org/abs/2301.10887v1 |
We demonstrate a fast adjoint-based method to optimize tokamak and
stellarator equilibria against a pressure-driven instability known as the
infinite-$n$ ideal ballooning mode. We present three finite-$\beta$ (the ratio
of thermal to magnetic pressure) equilibria: one tokamak equilibrium and two
stellarator equilibria ... | http://arxiv.org/abs/2302.07673v1 |
We develop a framework to assess the risk of cascading failures when a team
of agents aims to rendezvous in time in the presence of exogenous noise and
communication time-delay. The notion of value-at-risk (VaR) measure is used to
evaluate the risk of cascading failures (i.e., waves of large fluctuations)
when agents h... | http://arxiv.org/abs/2303.08669v1 |
Plasma technologies are a promising way of addressing a number of challenges
in combustion, ranging from stabilization and flame-holding for hypersonic
vehicles, to enabling low-emissions propulsion and power. Whereas most works in
the literature have centered on the forward problem: the impact of the plasma
on differe... | http://arxiv.org/abs/2306.04855v1 |
SDSS J1004+4112 is a well studied gravitational lens with a recently measured
time delay between its first and fourth arriving quasar images. Using this new
constraint, we present updated free-form lens reconstructions using the lens
inversion method {\tt GRALE}, which only uses multiple image and time delay
data as in... | http://arxiv.org/abs/2310.19884v1 |
Modern sciences and astrophysics in particular study objects and phenomena
not visible in physical terms, that is they cannot be investigated with the
eyes or analogous optical systems. Nevertheless, they make intensive use of
visual representations, showing data in a figurative way, using lights, colors,
and shapes fa... | http://arxiv.org/abs/2302.08226v1 |
In this paper, we propose a numerical method to uniformly handle the random
genetic drift model for pure drift with or without natural selection and
mutation.
For pure drift and natural selection case, the Dirac $\delta$ singularity
will develop at two boundary ends and the mass lumped at the two ends stands
for the ... | http://arxiv.org/abs/2310.17117v1 |
This paper presents a novel modular robot system that can self-reconfigure to
achieve omnidirectional movements for collaborative object transportation. Each
robotic module is equipped with a steerable omni-wheel for navigation and is
shaped as a regular icositetragon with a permanent magnet installed on each
corner fo... | http://arxiv.org/abs/2308.03328v1 |
Planning for sequential robotics tasks often requires integrated symbolic and
geometric reasoning. TAMP algorithms typically solve these problems by
performing a tree search over high-level task sequences while checking for
kinematic and dynamic feasibility. This can be inefficient because, typically,
candidate task pl... | http://arxiv.org/abs/2310.01775v4 |
We propose a protocol to excite the Goldstone modes of a supersolid dipolar
Bose-Einstein condensed gas confined in a ring geometry. By abruptly removing
an applied periodic modulation proportional to cos($\varphi$), where $\varphi$
is the azimuthal angle, we explore the resulting oscillations of the gas, by
solving th... | http://arxiv.org/abs/2308.05981v2 |
We study gravitational lensing of neutrinos in a Kaluza-Klein black hole
spacetime and compare the oscillation probabilities of neutrinos with the case
of lensing by black holes in General Relativity. We show that measuring
neutrino oscillations in curved spacetimes may allow us to distinguish the two
kinds of black ho... | http://arxiv.org/abs/2302.01564v2 |
Multiple intent detection and slot filling are two fundamental and crucial
tasks in spoken language understanding. Motivated by the fact that the two
tasks are closely related, joint models that can detect intents and extract
slots simultaneously are preferred to individual models that perform each task
independently. ... | http://arxiv.org/abs/2308.14654v1 |
Stochastic games are a well established model for multi-agent sequential
decision making under uncertainty. In practical applications, though, agents
often have only partial observability of their environment. Furthermore, agents
increasingly perceive their environment using data-driven approaches such as
neural networ... | http://arxiv.org/abs/2310.11566v3 |
Variational quantum algorithms, which consist of optimal parameterized
quantum circuits, are promising for demonstrating quantum advantages in the
noisy intermediate-scale quantum (NISQ) era. Apart from classical computational
resources, different kinds of quantum resources have their contributions to the
process of co... | http://arxiv.org/abs/2301.07445v3 |
Emission line galaxies (ELGs) are now the preeminent tracers of large-scale
structure at z>0.8 due to their high density and strong emission lines, which
enable accurate redshift measurements. However, relatively little is known
about ELG evolution and the ELG-halo connection, exposing us to potential
modeling systemat... | http://arxiv.org/abs/2310.09329v1 |
In this work and its sister paper [5] we give a new proof of the famous
Linnik theorem bounding the least prime in an arithmetic progression. Using
sieve machinery in both papers, we are able to dipense with the log-free zero
density bounds and the repulsion property of exceptional zeros, two deep
innovations begun by ... | http://arxiv.org/abs/2303.06122v1 |
We present a statistical analysis of ion distributions in magnetic
reconnection jets using data from the Magnetospheric Multiscale spacecraft.
Compared with the quiet plasma in which the jet propagates, we often find
anisotropic and non-Maxwellian ion distributions in the plasma jets. We observe
magnetic field fluctuat... | http://arxiv.org/abs/2301.10139v3 |
Nanoparticles, such as viruses, can enter cells via endocytosis. During
endocytosis, the cell surface wraps around the nanoparticle to effectively eat
it. Prior focus has been on how nanoparticle size and shape impacts
endocytosis. However, inspired by the noted presence of extracellular vimentin
affecting viral and ba... | http://arxiv.org/abs/2301.08776v2 |
The 2023 Multilingual Speech Universal Performance Benchmark (ML-SUPERB)
Challenge expands upon the acclaimed SUPERB framework, emphasizing
self-supervised models in multilingual speech recognition and language
identification. The challenge comprises a research track focused on applying
ML-SUPERB to specific multilingu... | http://arxiv.org/abs/2310.05513v1 |
While several recent works have identified societal-scale and
extinction-level risks to humanity arising from artificial intelligence, few
have attempted an {\em exhaustive taxonomy} of such risks. Many exhaustive
taxonomies are possible, and some are useful -- particularly if they reveal new
risks or practical approac... | http://arxiv.org/abs/2306.06924v2 |
We propose learning a depth covariance function with applications to
geometric vision tasks. Given RGB images as input, the covariance function can
be flexibly used to define priors over depth functions, predictive
distributions given observations, and methods for active point selection. We
leverage these techniques fo... | http://arxiv.org/abs/2303.12157v2 |
Under mild assumptions, we investigate the geometry of the loss landscape for
two-layer neural networks in the vicinity of global minima. Utilizing novel
techniques, we demonstrate: (i) how global minima with zero generalization
error become geometrically separated from other global minima as the sample
size grows; and... | http://arxiv.org/abs/2309.00508v3 |
For more than two decades it has been known that any compact Stein surface
(of real dimension four) admits a compatible Lefschetz fibration over a
two-disk. More recently, Giroux and Pardon have generalized this result by
giving a complex geometric proof for the existence of compatible Lefschetz
fibrations on Stein dom... | http://arxiv.org/abs/2310.15700v3 |
We endow the classical stochastic fluid process with a duration-dependent
Markovian arrival process (DMArP). We show that this provides a flexible model
for the revenue of a solar energy generator. In particular, it allows for
heavy-tailed interarrival times and for seasonality embedded into the
state-space. It general... | http://arxiv.org/abs/2304.06185v1 |
Evaluating the factual consistency of automatically generated summaries is
essential for the progress and adoption of reliable summarization systems.
Despite recent advances, existing factuality evaluation models are not robust,
being especially prone to entity and relation errors in new domains. We propose
FactKB, a s... | http://arxiv.org/abs/2305.08281v2 |
Compact obscured nuclei (CONs) are relatively common in the centers of local
(U)LIRGs, yet their nature remains unknown. Both AGN activity and extreme
nuclear starbursts have been suggested as plausible nuclear power sources. The
prevalence of outflows in these systems suggest that CONs represent a key phase
in the nuc... | http://arxiv.org/abs/2309.01616v1 |
Electron optics deals with condensed matter platforms for manipulating and
guiding electron beams with high efficiency and robustness. Common devices rely
on the spatial confinement of the electrons into one-dimensional channels.
Recently, there is growing interest in electron optics applications in two
dimensions, whi... | http://arxiv.org/abs/2307.07913v2 |
A brain-computer interface (BCI) is a technology that enables direct
communication between the brain and an external device or computer system. It
allows individuals to interact with the device using only their thoughts, and
holds immense potential for a wide range of applications in medicine,
rehabilitation, and human... | http://arxiv.org/abs/2305.11908v1 |
We study the exact linearization of configuration flat Lagrangian control
systems with p degrees of freedom and p-1 inputs by quasi-static feedback of
classical states. First, we present a detailed analysis of the structure of the
parameterization of the system variables by the flat output. Based on that, we
systematic... | http://arxiv.org/abs/2310.13371v2 |
The reconstruction of trajectories of charged particles is a key
computational challenge for current and future collider experiments.
Considering the rapid progress in quantum computing, it is crucial to explore
its potential for this and other problems in high-energy physics. The problem
can be formulated as a quadrat... | http://arxiv.org/abs/2303.13249v1 |
Distributed machine learning paradigms, such as federated learning, have been
recently adopted in many privacy-critical applications for speech analysis.
However, such frameworks are vulnerable to privacy leakage attacks from shared
gradients. Despite extensive efforts in the image domain, the exploration of
speech pri... | http://arxiv.org/abs/2302.10441v1 |
Vertex splitting replaces a vertex by two copies and partitions its incident
edges amongst the copies. This problem has been studied as a graph editing
operation to achieve desired properties with as few splits as possible, most
often planarity, for which the problem is NP-hard. Here we study how to
minimize the number... | http://arxiv.org/abs/2301.09440v1 |
Understanding the complex evolution of protoplanetary disks (PPDs) and their
dispersal via energetic stellar radiation are prominent challenges in
astrophysics. It has recently been established that specifically the X-ray
luminosity from the central protostar can significantly heat the surface of the
disk, causing powe... | http://arxiv.org/abs/2310.01985v1 |
Integrating turbulence into stellarator optimization is shown by targeting
the onset for the ion-temperature-gradient mode, highlighting effects of
parallel connection length, local magnetic shear, and flux surface expansion.
The result is a compact quasihelically symmetric stellarator configuration,
admitting a set of... | http://arxiv.org/abs/2301.06773v2 |
Brain activities are featured by spatially distributed neural clusters of
coherent firings and a spontaneous switching of the clusters between the
synchrony and asynchrony states. Evidences from {\it in vivo} experiments
suggest that astrocytes, a type of glial cell regarded previously as providing
only structural and ... | http://arxiv.org/abs/2302.00652v1 |
Domain-adaptive pre-training (or DA-training for short), also known as
post-training, aims to train a pre-trained general-purpose language model (LM)
using an unlabeled corpus of a particular domain to adapt the LM so that
end-tasks in the domain can give improved performances. However, existing
DA-training methods are... | http://arxiv.org/abs/2301.08986v1 |
Sequence-to-sequence (seq2seq) models have been widely used for natural
language processing, computer vision, and other deep learning tasks. We find
that seq2seq models trained with early-stopping suffer from issues at the token
level. In particular, while some tokens in the vocabulary demonstrate
overfitting, others u... | http://arxiv.org/abs/2305.04493v2 |
Real-world data is complex and often consists of objects that can be
decomposed into multiple entities (e.g. images into pixels, graphs into
interconnected nodes). Randomized smoothing is a powerful framework for making
models provably robust against small changes to their inputs - by guaranteeing
robustness of the maj... | http://arxiv.org/abs/2310.16221v4 |
Despite their impressive offline results, deep learning models for symbolic
music generation are not widely used in live performances due to a deficit of
musically meaningful control parameters and a lack of structured musical form
in their outputs. To address these issues we introduce LooperGP, a method for
steering a... | http://arxiv.org/abs/2303.01665v1 |
Given an algebra in a monoidal 2-category, one can construct a 2-category of
right modules. Given a braided algebra in a braided monoidal 2-category, it is
possible to refine the notion of right module to that of a local module. Under
mild assumptions, we prove that the 2-category of local modules admits a
braided mono... | http://arxiv.org/abs/2307.02843v1 |
Current fake audio detection algorithms have achieved promising performances
on most datasets. However, their performance may be significantly degraded when
dealing with audio of a different dataset. The orthogonal weight modification
to overcome catastrophic forgetting does not consider the similarity of genuine
audio... | http://arxiv.org/abs/2308.03300v1 |
Most Neural Radiance Fields (NeRFs) exhibit limited generalization
capabilities, which restrict their applicability in representing multiple
scenes using a single model. To address this problem, existing generalizable
NeRF methods simply condition the model on image features. These methods still
struggle to learn preci... | http://arxiv.org/abs/2304.04962v2 |
In this note, we prove:
\medskip \noindent {\bf Theorem A:} \emph{ There is a fixed constant $C$ such
that for any positive integer $n$ and prime $p$, every finite subgroup $G$ of
order coprime to $p$ of ${\rm GL}(n,\mathbb{C})$ has an Abelian normal subgroup
$A$ with $$[G:A] \leq (Cp)^{n-1}.$$} | http://arxiv.org/abs/2301.10111v1 |
We investigate the role of the magnetohydrodynamic (MHD) turbulence measured
by Voyager in the very local interstellar medium (VLISM) in modeling the
Interstellar Boundary Explorer (IBEX) ribbon. We demonstrate that the mirroring
by compressible modes of MHD turbulence dominates over that by the mean
magnetic field. Ba... | http://arxiv.org/abs/2310.06032v1 |
We propose the concept of pair-wise coherence to study the relation between
the l1 norm of coherence and the quantum interference in Young's multi-photon
multi-path experiments, where the input photons may be entangled each other. We
find that only the local coherence of each single photon can make quantum
interference... | http://arxiv.org/abs/2303.09239v1 |
Intuitively, the totality of physical reality -- the Cosmos -- has a
beginning only if (i) all parts of the Cosmos agree on the direction of time
(the Direction Condition) and (ii) there is a boundary to the past of all
non-initial spacetime points such that there are no spacetime points to the
past of the boundary (th... | http://arxiv.org/abs/2308.13113v1 |
The mathematical objects employed in physical theories do not always behave
well. Einstein's theory of space and time allows for spacetime singularities
and Van Hove singularities arise in condensed matter physics, while intensity,
phase and polarization singularities pervade wave physics. Within dissipative
systems go... | http://arxiv.org/abs/2307.03585v1 |
We consider a chance-constrained multi-robot motion planning problem in the
presence of Gaussian motion and sensor noise. Our proposed algorithm, CC-K-CBS,
leverages the scalability of kinodynamic conflict-based search (K-CBS) in
conjunction with the efficiency of the Gaussian belief trees used in the
Belief-A framewor... | http://arxiv.org/abs/2303.11476v4 |
In economic and financial applications, there is often the need for analysing
multivariate time series, comprising of time series for a range of quantities.
In some applications such complex systems can be associated with some
underlying network describing pairwise relationships among the quantities.
Accounting for the... | http://arxiv.org/abs/2305.16097v3 |
We present fundamental scaling relationships between properties of the
optical/UV light curves of tidal disruption events (TDEs) and the mass of the
black hole that disrupted the star. We have uncovered these relations from the
late-time emission of TDEs. Using a sample of 63 optically-selected TDEs, the
latest catalog... | http://arxiv.org/abs/2308.08255v2 |
We establish a sharp lower-bound for the number of conjugacy classes $k(A_n)$
in the alternating group $A_n$, for $n \geq 3$. Namely, we show that
$k\left(A_n\right) \geq \frac{k\left(A_7\right)}{\log_2\left|A_7\right|} \cdot
\log_2\left|A_n\right|$ with equality if, and only if, $n = 7$. The
observations leading towar... | http://arxiv.org/abs/2310.12047v1 |
The Debye-Falkenhagen differential equation is commonly used as a mean-field
macroscopic model for describing electrochemical ionic drift and diffusion in
dilute binary electrolytes when subjected to a suddenly applied potential
smaller than the thermal voltage. However, the ionic transport in most
electrochemical syst... | http://arxiv.org/abs/2308.00609v1 |
Intermediate stages between pores and sunspots are a rare phenomenon and can
manifest with the formation of transient photospheric penumbral-like filaments.
Although the magnetic field changes rapidly during the evolution of such
filaments, they have not been shown to be connected to magnetic reconnection
events yet. W... | http://arxiv.org/abs/2303.03072v1 |
DNA is a promising storage medium, but its stability and occurrence of Indel
errors pose a significant challenge. The relative occurrence of Guanine(G) and
Cytosine(C) in DNA is crucial for its longevity, and reverse complementary base
pairs should be avoided to prevent the formation of a secondary structure in
DNA str... | http://arxiv.org/abs/2302.14627v4 |
Given a compact doubling metric measure space $X$ that supports a
$2$-Poincar\'e inequality, we construct a Dirichlet form on $N^{1,2}(X)$ that
is comparable to the upper gradient energy form on $N^{1,2}(X)$. Our approach
is based on the approximation of $X$ by a family of graphs that is doubling and
supports a $2$-Poi... | http://arxiv.org/abs/2310.14436v1 |
We propose a novel device concept using spin-orbit-torques to realize a
magnetic field sensor, where we eliminate the sensor offset using a
differential measurement concept. We derive a simple analytical formulation for
the sensor signal and demonstrate its validity with numerical investigations
using macrospin simulat... | http://arxiv.org/abs/2303.13261v1 |
X-ray time-resolved tomography is one of the most popular X-ray techniques to
probe dynamics in three dimensions (3D). Recent developments in time-resolved
tomography opened the possibility of recording kilohertz-rate 3D movies.
However, tomography requires rotating the sample with respect to the X-ray
beam, which prev... | http://arxiv.org/abs/2305.11920v1 |
Finding multiple temporal relationships among locations can benefit a bunch
of urban applications, such as dynamic offline advertising and smart public
transport planning. While some efforts have been made on finding static
relationships among locations, little attention is focused on studying
time-aware location relat... | http://arxiv.org/abs/2306.08921v1 |
We present a single attention head in GPT-2 Small that has one main role
across the entire training distribution. If components in earlier layers
predict a certain token, and this token appears earlier in the context, the
head suppresses it: we call this copy suppression. Attention Head 10.7 (L10H7)
suppresses naive co... | http://arxiv.org/abs/2310.04625v1 |
Some young supernova remnants exhibit thin filaments of X-ray synchrotron
radiation coinciding with the forward shock due to accelerated electrons
interacting with the local magnetic field. The two main models accounting for
the radial brightness evolution of these filaments differ in their prediction
of the narrowing ... | http://arxiv.org/abs/2302.04352v1 |
While large-scale image-text pretrained models such as CLIP have been used
for multiple video-level tasks on trimmed videos, their use for temporal
localization in untrimmed videos is still a relatively unexplored task. We
design a new approach for this called UnLoc, which uses pretrained image and
text towers, and fee... | http://arxiv.org/abs/2308.11062v1 |
Out-of-distribution (OOD) detection aims to identify test examples that do
not belong to the training distribution and are thus unlikely to be predicted
reliably. Despite a plethora of existing works, most of them focused only on
the scenario where OOD examples come from semantic shift (e.g., unseen
categories), ignori... | http://arxiv.org/abs/2304.06813v2 |
Processes involving the manufacture of fine/bulk chemicals, pharmaceuticals,
biofuels, and waste treatment require plug flow characteristics to minimise
their energy consumption and costs, and maximise product quality. One such
versatile flow chemistry platform is the coiled tube reactor subjected to
oscillatory motion... | http://arxiv.org/abs/2305.16929v1 |
We present Flow-Guided Density Ratio Learning (FDRL), a simple and scalable
approach to generative modeling which builds on the stale (time-independent)
approximation of the gradient flow of entropy-regularized f-divergences
introduced in recent work. Specifically, the intractable time-dependent density
ratio is approx... | http://arxiv.org/abs/2303.03714v3 |
The visual system evolved to process natural scenes, yet most of our
understanding of the topology and function of visual cortex derives from
studies using artificial stimuli. To gain deeper insights into visual
processing of natural scenes, we utilized widefield calcium-imaging of primate
V4 in response to many natura... | http://arxiv.org/abs/2307.00932v2 |
We present a method for pretraining a recurrent mixture density network
(RMDN). We also propose a slight modification to the architecture of the
RMDN-GARCH proposed by Nikolaev et al. [2012]. The pretraining method helps the
RMDN avoid bad local minima during training and improves its robustness to the
persistent NaN p... | http://arxiv.org/abs/2302.14141v1 |
Human mobility patterns have shown significant applications in
policy-decision scenarios and economic behavior researches. The human mobility
simulation task aims to generate human mobility trajectories given a small set
of trajectory data, which have aroused much concern due to the scarcity and
sparsity of human mobil... | http://arxiv.org/abs/2306.09381v3 |
We compute explicitly the Bergman kernels of all two dimensional monomial
polyhedra, a class of domains including the Hartogs triangle and some of its
generalizations. The kernel is computed from the representation of such domains
as quotient of the product of a disc and punctured disc. | http://arxiv.org/abs/2303.14268v1 |
The Erd\"os Renyi graph is a popular choice to model network data as it is
parsimoniously parametrized, straightforward to interprete and easy to
estimate. However, it has limited suitability in practice, since it often fails
to capture crucial characteristics of real-world networks. To check the
adequacy of this model... | http://arxiv.org/abs/2305.10380v2 |
3D multi-object tracking (MOT) is essential for an autonomous mobile agent to
safely navigate a scene. In order to maximize the perception capabilities of
the autonomous agent, we aim to develop a 3D MOT framework that fuses camera
and LiDAR sensor information. Building on our prior LiDAR-only work, ShaSTA,
which model... | http://arxiv.org/abs/2310.02532v1 |
Recent studies have shown that 6.7 GHz methanol maser flares can be a
powerful tool for verifying the mechanisms of maser production and even the
specific signatures of accretion rate changes in the early stages of high-mass
star formation. We characterize the spatial structure and evolution of methanol
and water maser... | http://arxiv.org/abs/2302.02723v1 |
Generating proper embedding of sentences through an unsupervised way is
beneficial to semantic matching and retrieval problems in real-world scenarios.
This paper presents Representation ALchemy (RepAL), an extremely simple
post-processing method that enhances sentence representations. The basic idea
in RepAL is to de-... | http://arxiv.org/abs/2305.07824v1 |
In this paper, we investigate in detail the structures of the variational
characterization $A_{N,t}$ of the spherical $t$-design, its gradient $\nabla
A_{N,t}$, and its Hessian $\mathcal{H}(A_{N,t})$ in terms of fast spherical
harmonic transforms. Moreover, we propose solving the minimization problem of
$A_{N,t}$ using... | http://arxiv.org/abs/2303.05365v1 |
Generative models are now capable of producing natural language text that is,
in some cases, comparable in quality to the text produced by people. In the
computing education context, these models are being used to generate code, code
explanations, and programming exercises. The rapid adoption of these models has
prompt... | http://arxiv.org/abs/2308.04309v1 |
We are concerned with nonlinear stability and existence of two-dimensional
current-vortex sheets in ideal compressible magnetohydrodynamics. This is a
nonlinear hyperbolic initial-boundary value problem with characteristic free
boundary. It is well-known that current-vortex sheets may be at most weakly
(neutrally) stab... | http://arxiv.org/abs/2305.02784v1 |
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