Zobrazeno 1 - 10
of 389
pro vyhledávání: '"Xu Shixin"'
The accumulation of potassium in the extracellular space surrounding nerve cells is a fundamental aspect of biophysics that has garnered significant attention in recent research. This phenomenon holds implications for various neurological conditions,
Externí odkaz:
http://arxiv.org/abs/2410.10895
Class imbalance remains a significant challenge in machine learning, particularly for tabular data classification tasks. While Gradient Boosting Decision Trees (GBDT) models have proven highly effective for such tasks, their performance can be compro
Externí odkaz:
http://arxiv.org/abs/2407.14381
We introduce a set of gradient-flow-guided adaptive importance sampling (IS) transformations to stabilize Monte-Carlo approximations of point-wise leave one out cross-validated (LOO) predictions for Bayesian classification models. One can leverage th
Externí odkaz:
http://arxiv.org/abs/2402.08151
Autor:
Xu, Shixin, Xu, Zhiliang
Local discontinuous Galerkin methods are developed for solving second order and fourth order time-dependent partial differential equations defined on static 2D manifolds. These schemes are second-order accurate with surfaces triangulized by planar tr
Externí odkaz:
http://arxiv.org/abs/2401.02069
Dealing with label noise in tabular classification tasks poses a persistent challenge in machine learning. While robust boosting methods have shown promise in binary classification, their effectiveness in complex, multi-class scenarios is often limit
Externí odkaz:
http://arxiv.org/abs/2310.05067
This article delves into the micro-macro modeling of polymeric fluids, considering various microscopic potential energies, including the classical Hookean potential, as well as newly proposed modified Morse and Elastic-plastic potentials. These propo
Externí odkaz:
http://arxiv.org/abs/2309.14661
Publikováno v:
Jichu yixue yu linchuang, Vol 44, Iss 8, Pp 1180-1184 (2024)
Astrocytes are heavily activated in Alzheimer′s disease, engulfing damaged synapses, Aβ proteins, Tau proteins, apoptotic cells and other substrates. However, these substrates are difficult to degrade, accumulate as the disease progresses, and imp
Externí odkaz:
https://doaj.org/article/44eb08051f6d467fa62ba1dc20d8a915
Autor:
Luo, Jiaqi, Xu, Shixin
Deep learning models have become popular in the analysis of tabular data, as they address the limitations of decision trees and enable valuable applications like semi-supervised learning, online learning, and transfer learning. However, these deep-le
Externí odkaz:
http://arxiv.org/abs/2307.12198
Chemical reactions involve the movement of charges, and this work presents a mathematical model for describing chemical reactions in electrolytes. The model is developed using an energy variational method that aligns with classical thermodynamics pri
Externí odkaz:
http://arxiv.org/abs/2305.12165
A phase field model for droplets suspended in viscous liquids under the influence of electric fields
In this paper, we propose a Poisson-Nernst-Planck-Navier-Stokes-Cahn-Hillard (PNP-NS-CH)model for an electrically charged droplet suspended in a viscous fluid subjected to an external electric field. Our model incorporates spatial variations of elect
Externí odkaz:
http://arxiv.org/abs/2305.10296