Model: bhujith10/deberta-v3-base-setfit_finetuned
Author: bhujith10
Pipeline: text-classification
Library: setfit
Tags: setfit, safetensors, deberta-v2, sentence-transformers, text-classification, generated_from_setfit_trainer, dataset:bhujith10/multi_class_classification_dataset, arxiv:2209.11055, base_model:microsoft/deberta-v3-base, base_model:finetune:microsoft/deberta-v3-base, region:us
Base models (finetune): id: microsoft/deberta-v3-base
Card metadata: base_model: microsoft/deberta-v3-base
datasets: bhujith10/multi_class_classification_dataset
library_name: setfit
metrics: accuracy
pipeline_tag: text-classification
tags: setfit, sentence-transformers, text-classification, generated_from_setfit_trainer
widget: Title: Detecting Adversarial Samples Using Density Ratio Estimates,
Abstract: Machine learning models, especially based on deep architectures are used in
everyday applications ranging from self driving cars to medical diagnostics. It
has been shown that such models are dangerously susceptible to adversarial
samples, indistinguishable from real samples to human eye, adversarial samples
lead to incorrect classifications with high confidence. Impact of adversarial
samples is far-reaching and their efficient detection remains an open problem.
We propose to use direct density ratio estimation as an efficient model
agnostic measure to detect adversarial samples. Our proposed method works
equally well with single and multi-channel samples, and with different
adversarial sample generation methods. We also propose a method to use density
ratio estimates for generating adversarial samples with an added constraint of
preserving density ratio., Title: Dynamics of exciton magnetic polarons in CdMnSe/CdMgSe quantum wells: the effect of self-localization,
Abstract: We study the exciton magnetic polaron (EMP) formation in (Cd,Mn)Se/(Cd,Mg)Se
diluted-magnetic-semiconductor quantum wells using time-resolved
photoluminescence (PL). The magnetic field and temperature dependencies of this
dynamics allow us to separate the non-magnetic and magnetic contributions to
the exciton localization. We deduce the EMP energy of 14 meV, which is in
agreement with time-integrated measurements based on selective excitation and
the magnetic field dependence of the PL circular polarization degree. The
polaron formation time of 500 ps is significantly longer than the corresponding
values reported earlier. We propose that this behavior is related to strong
self-localization of the EMP, accompanied with a squeezing of the heavy-hole
envelope wavefunction. This conclusion is also supported by the decrease of the
exciton lifetime from 600 ps to 200 - 400 ps with increasing magnetic field and
temperature., Title: Exponential Sums and Riesz energies,
Abstract: We bound an exponential sum that appears in the study of irregularities of
distribution (the low-frequency Fourier energy of the sum of several Dirac
measures) by geometric quantities: a special case is that for all $\left\{ x_1,
\dots, x_N\right\} \subset \mathbb{T}^2$, $X \geq 1$ and a universal $c>0$ $$
\sum_{i,j=1}^{N}{ \frac{X^2}{1 + X^4 \|x_i -x_j\|^4}} \lesssim \sum_{k \in
\mathbb{Z}^2 \atop \|k\| \leq X}{ \left| \sum_{n=1}^{N}{ e^{2 \pi i
\left\langle k, x_n \right\rangle}}\right|^2} \lesssim \sum_{i,j=1}^{N}{ X^2
e^{-c X^2\|x_i -x_j\|^2}}.$$ Since this exponential sum is intimately tied to
rather subtle distribution properties of the points, we obtain nonlocal
structural statements for near-minimizers of the Riesz-type energy. In the
regime $X \gtrsim N^{1/2}$ both upper and lower bound match for
maximally-separated point sets satisfying $\|x_i -x_j\| \gtrsim N^{-1/2}$., Title: Influence of Spin Orbit Coupling in the Iron-Based Superconductors,
Abstract: We report on the influence of spin-orbit coupling (SOC) in the Fe-based
superconductors (FeSCs) via application of circularly-polarized spin and
angle-resolved photoemission spectroscopy. We combine this technique in
representative members of both the Fe-pnictides and Fe-chalcogenides with ab
initio density functional theory and tight-binding calculations to establish an
ubiquitous modification of the electronic structure in these materials imbued
by SOC. The influence of SOC is found to be concentrated on the hole pockets
where the superconducting gap is generally found to be largest. This result
contests descriptions of superconductivity in these materials in terms of pure
spin-singlet eigenstates, raising questions regarding the possible pairing
mechanisms and role of SOC therein., Title: Zero-point spin-fluctuations of single adatoms,
Abstract: Stabilizing the magnetic signal of single adatoms is a crucial step towards
their successful usage in widespread technological applications such as
high-density magnetic data storage devices. The quantum mechanical nature of
these tiny objects, however, introduces intrinsic zero-point spin-fluctuations
that tend to destabilize the local magnetic moment of interest by dwindling the
magnetic anisotropy potential barrier even at absolute zero temperature. Here,
we elucidate the origins and quantify the effect of the fundamental ingredients
determining the magnitude of the fluctuations, namely the ($i$) local magnetic
moment, ($ii$) spin-orbit coupling and ($iii$) electron-hole Stoner
excitations. Based on a systematic first-principles study of 3d and 4d adatoms,
we demonstrate that the transverse contribution of the fluctuations is
comparable in size to the magnetic moment itself, leading to a remarkable
$\gtrsim$50$\%$ reduction of the magnetic anisotropy energy. Our analysis gives
rise to a comprehensible diagram relating the fluctuation magnitude to
characteristic features of adatoms, providing practical guidelines for
designing magnetically stable nanomagnets with minimal quantum fluctuations.
inference: no
Likes: 0 | All-time downloads: 67
Created: 2024-12-23 18:21:19