Search Results for author: Shixin Xu

Found 9 papers, 3 papers with code

Gradient-flow adaptive importance sampling for Bayesian leave one out cross-validation for sigmoidal classification models

no code implementations13 Feb 2024 Joshua C Chang, Xiangting Li, Shixin Xu, Hao-Ren Yao, Julia Porcino, Carson Chow

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.

Robust-GBDT: GBDT with Nonconvex Loss for Tabular Classification in the Presence of Label Noise and Class Imbalance

1 code implementation8 Oct 2023 Jiaqi Luo, Yuedong Quan, Shixin Xu

This research heralds a paradigm shift in machine learning, paving the way for a new era of robust and precise classification across diverse real-world applications.

Binary Classification Classification +3

NCART: Neural Classification and Regression Tree for Tabular Data

no code implementations23 Jul 2023 Jiaqi Luo, Shixin Xu

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.

Classification regression +1

TRBoost: A Generic Gradient Boosting Machine based on Trust-region Method

1 code implementation28 Sep 2022 Jiaqi Luo, Zihao Wei, Junkai Man, Shixin Xu

Gradient Boosting Machines (GBMs) have demonstrated remarkable success in solving diverse problems by utilizing Taylor expansions in functional space.

Multi-objective optimization and explanation for stroke risk assessment in Shanxi province

no code implementations29 Jul 2021 Jing Ma, Yiyang Sun, Junjie Liu, Huaxiong Huang, Xiaoshuang Zhou, Shixin Xu

The experimental results showed that the QIDNN model with 7 interactive features achieve the state-of-art accuracy $83. 25\%$.

A phase field model for mass transport with semi-permeable interfaces

no code implementations11 Mar 2021 Yuzhe Qin, Huaxiong Huang, Yi Zhu, Chun Liu, Shixin Xu

Numerical simulations first illustrate the consistency of theoretical results on the sharp interface limit.

Numerical Analysis Numerical Analysis 76Z99, 92B05, 76R50

An Energy Stable C0 Finite Element Scheme for A Phase-Field Model of Vesicle Motion and Deformation

no code implementations10 Dec 2020 Lingyue Shen, Zhiliang Xu, Ping Lin, Huaxiong Huang, Shixin Xu

A thermodynamically consistent phase-field model is introduced for simulating motion and shape transformation of vesicles under flow conditions.

Numerical Analysis Numerical Analysis 76T06 92B05 35Q92

Neural-PDE: A RNN based neural network for solving time dependent PDEs

1 code implementation8 Sep 2020 Yihao Hu, Tong Zhao, Shixin Xu, Zhiliang Xu, Lizhen Lin

Partial differential equations (PDEs) play a crucial role in studying a vast number of problems in science and engineering.

BIG-bench Machine Learning

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