Search Results for author: Yuanzhe Xi

Found 13 papers, 6 papers with code

Reducing operator complexity in Algebraic Multigrid with Machine Learning Approaches

no code implementations15 Jul 2023 Ru Huang, Kai Chang, Huan He, Ruipeng Li, Yuanzhe Xi

We propose a data-driven and machine-learning-based approach to compute non-Galerkin coarse-grid operators in algebraic multigrid (AMG) methods, addressing the well-known issue of increasing operator complexity.

MedDiff: Generating Electronic Health Records using Accelerated Denoising Diffusion Model

no code implementations8 Feb 2023 Huan He, Shifan Zhao, Yuanzhe Xi, Joyce C Ho

Due to patient privacy protection concerns, machine learning research in healthcare has been undeniably slower and limited than in other application domains.

Denoising

MuG: A Multimodal Classification Benchmark on Game Data with Tabular, Textual, and Visual Fields

1 code implementation6 Feb 2023 Jiaying Lu, Yongchen Qian, Shifan Zhao, Yuanzhe Xi, Carl Yang

Previous research has demonstrated the advantages of integrating data from multiple sources over traditional unimodal data, leading to the emergence of numerous novel multimodal applications.

Classification

Data-Driven Linear Complexity Low-Rank Approximation of General Kernel Matrices: A Geometric Approach

no code implementations24 Dec 2022 Difeng Cai, Edmond Chow, Yuanzhe Xi

Such rectangular kernel matrices may arise, for example, in Gaussian process regression where $X$ corresponds to the training data and $Y$ corresponds to the test data.

An Efficient Nonlinear Acceleration method that Exploits Symmetry of the Hessian

no code implementations22 Oct 2022 Huan He, Shifan Zhao, Ziyuan Tang, Joyce C Ho, Yousef Saad, Yuanzhe Xi

Nonlinear acceleration methods are powerful techniques to speed up fixed-point iterations.

AUTM Flow: Atomic Unrestricted Time Machine for Monotonic Normalizing Flows

no code implementations5 Jun 2022 Difeng Cai, Yuliang Ji, Huan He, Qiang Ye, Yuanzhe Xi

AUTM offers a versatile and efficient way to the design of normalizing flows with explicit inverse and unrestricted function classes or parameters.

Density Estimation Image Generation +1

GDA-AM: On the effectiveness of solving minimax optimization via Anderson Acceleration

1 code implementation6 Oct 2021 Huan He, Shifan Zhao, Yuanzhe Xi, Joyce C Ho, Yousef Saad

We also empirically show that GDA-AMsolves a variety of minimax problems and improves GAN training on several datasets

GDA-AM: ON THE EFFECTIVENESS OF SOLVING MIN-IMAX OPTIMIZATION VIA ANDERSON MIXING

no code implementations ICLR 2022 Huan He, Shifan Zhao, Yuanzhe Xi, Joyce Ho, Yousef Saad

We also empirically show that GDA-AM solves a variety of minimax problems and improves GAN training on several datasets

Learning optimal multigrid smoothers via neural networks

no code implementations24 Feb 2021 Ru Huang, Ruipeng Li, Yuanzhe Xi

Multigrid methods are one of the most efficient techniques for solving linear systems arising from Partial Differential Equations (PDEs) and graph Laplacians from machine learning applications.

Generating a Doppelganger Graph: Resembling but Distinct

1 code implementation23 Jan 2021 Yuliang Ji, Ru Huang, Jie Chen, Yuanzhe Xi

Deep generative models, since their inception, have become increasingly more capable of generating novel and perceptually realistic signals (e. g., images and sound waves).

Benchmarking Graph Representation Learning +1

A non-perturbative approach to computing seismic normal modes in rotating planets

2 code implementations25 Jun 2019 Jia Shi, Ruipeng Li, Yuanzhe Xi, Yousef Saad, Maarten V. de Hoop

A Continuous Galerkin method-based approach is presented to compute the seismic normal modes of rotating planets.

Computational Physics Earth and Planetary Astrophysics Geophysics 86-08, 86-04, 85-04, 85-08, 85-10, 15A18, 65N25, 65N30

The Eigenvalues Slicing Library (EVSL): Algorithms, Implementation, and Software

1 code implementation14 Feb 2018 Ruipeng Li, Yuanzhe Xi, Lucas Erlandson, Yousef Saad

This paper describes a software package called EVSL (for EigenValues Slicing Library) for solving large sparse real symmetric standard and generalized eigenvalue problems.

Numerical Analysis

SMASH: Structured matrix approximation by separation and hierarchy

1 code implementation15 May 2017 Difeng Cai, Edmond Chow, Yousef Saad, Yuanzhe Xi

This paper presents an efficient method to perform Structured Matrix Approximation by Separation and Hierarchy (SMASH), when the original dense matrix is associated with a kernel function.

Numerical Analysis

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