Effect of Ti addition on the structural, thermodynamic, and elastic
properties of Tix(HfNbTaZr)(1−x)/4 alloys
December 21, 2022
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Physics
Materials Science
The structure and thermodynamic properties of Tix(HfNbTaZr)(1−x)/4
from Refractory High Entropy multicomponent Alloys to pure titanium are
investigated employing comprehensive MCSQS realizations of the disordered
atomic structure an...
Language models are better than humans at next-token prediction
December 21, 2022
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Computer Science
Computation and Language
Artificial Intelligence
Machine Learning
Current language models are considered to have sub-human capabilities at
natural language tasks like question-answering or writing code. However,
language models are not trained to perform well at these tasks, they are
trained to accurately...
Bivariate P-polynomial association schemes
December 21, 2022
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Mathematics
Combinatorics
Bivariate P-polynomial association scheme of type (α,β) are
defined as a generalization of the P-polynomial association schemes. This
generalization is shown to be equivalent to a set of conditions on the
intersection parameters....
Inference for Non-Stationary Heavy Tailed Time Series
December 21, 2022
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Mathematics
Statistics
Statistics Theory
Statistics Theory
We consider the problem of inference for non-stationary time series with
heavy-tailed error distribution. Under a time-varying linear process framework
we show that there exists a suitable local approximation by a stationary
process with he...
Small-time approximation of the transition density for diffusions with
singularities. Application to the Wright-Fisher model
December 21, 2022
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Statistics
Mathematics
Methodology
Probability
The Wright-Fisher (W-F) diffusion model serves as a foundational framework
for interpreting population evolution through allele frequency dynamics over
time. Despite the known transition probability between consecutive generations,
an exact...
Torsion-free connections on G-structures
December 21, 2022
Mathematics
Differential Geometry
We prove that for a group SOn(R)⊂G⊂GLn(R), any G-structure on a smooth manifold can be
endowed with a torsion free connection which is locally the Levi-Civita
connection of a Rieman...
Superfluid excitations in rotating two-dimensional ring traps
December 21, 2022
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Physics
Quantum Gases
We studied a rotating Bose-Einstein condensate confined in ring trap
configurations that can be produced starting with a bubble trap confinement,
approximated by a Mexican hat and shifted harmonic oscillator potentials. Using
a variational ...
Algorithmic Shadow Spectroscopy
December 21, 2022
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Physics
Quantum Physics
We present shadow spectroscopy as a simulator-agnostic quantum algorithm for
estimating energy gaps using very few circuit repetitions (shots) and no extra
resources (ancilla qubits) beyond performing time evolution and measurements.
The ap...
Not Just Pretty Pictures: Toward Interventional Data Augmentation Using
Text-to-Image Generators
December 21, 2022
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Computer Science
Computer Vision and Pattern Recognition
Neural image classifiers are known to undergo severe performance degradation
when exposed to inputs that are sampled from environmental conditions that
differ from their training data. Given the recent progress in Text-to-Image
(T2I) genera...
A Survey of Mix-based Data Augmentation: Taxonomy, Methods,
Applications, and Explainability
December 21, 2022
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Computer Science
Machine Learning
Computation and Language
Computer Vision and Pattern Recognition
Data augmentation (DA) is indispensable in modern machine learning and deep
neural networks. The basic idea of DA is to construct new training data to
improve the model's generalization by adding slightly disturbed versions of
existing data...