Search Results for author: Yingzhou Li

Found 10 papers, 7 papers with code

ButterflyNet2D: Bridging Classical Methods and Neural Network Methods in Image Processing

1 code implementation29 Nov 2022 Gengzhi Yang, Yingzhou Li

Both classical Fourier transform-based methods and neural network methods are widely used in image processing tasks.

SpecNet2: Orthogonalization-free spectral embedding by neural networks

1 code implementation14 Jun 2022 Ziyu Chen, Yingzhou Li, Xiuyuan Cheng

The current paper introduces a new neural network approach, named SpecNet2, to compute spectral embedding which optimizes an equivalent objective of the eigen-problem and removes the orthogonalization layer in SpecNet1.

Computational Efficiency

Distributed-memory $\mathcal{H}$-matrix Algebra I: Data Distribution and Matrix-vector Multiplication

1 code implementation28 Aug 2020 Yingzhou Li, Jack Poulson, Lexing Ying

We introduce a data distribution scheme for $\mathcal{H}$-matrices and a distributed-memory algorithm for $\mathcal{H}$-matrix-vector multiplication.

Numerical Analysis Distributed, Parallel, and Cluster Computing Numerical Analysis 65F99, 65Y05

Butterfly-Net2: Simplified Butterfly-Net and Fourier Transform Initialization

1 code implementation9 Dec 2019 Zhongshu Xu, Yingzhou Li, Xiuyuan Cheng

Structured CNN designed using the prior information of problems potentially improves efficiency over conventional CNNs in various tasks in solving PDEs and inverse problems in signal processing.

Deblurring Denoising

Mask Embedding in conditional GAN for Guided Synthesis of High Resolution Images

1 code implementation3 Jul 2019 Yinhao Ren, Zhe Zhu, Yingzhou Li, Joseph Lo

To use semantic masks as guidance whilst providing realistic synthesized results with fine details, we propose to use mask embedding mechanism to allow for a more efficient initial feature projection in the generator.

Image Generation

Variational training of neural network approximations of solution maps for physical models

no code implementations7 May 2019 Yingzhou Li, Jianfeng Lu, Anqi Mao

A novel solve-training framework is proposed to train neural network in representing low dimensional solution maps of physical models.

Coordinate descent full configuration interaction

1 code implementation12 Feb 2019 Zhe Wang, Yingzhou Li, Jianfeng Lu

We develop an efficient algorithm, coordinate descent FCI (CDFCI), for the electronic structure ground state calculation in the configuration interaction framework.

Chemical Physics Computational Physics

A stochastic version of Stein Variational Gradient Descent for efficient sampling

no code implementations9 Feb 2019 Lei Li, Yingzhou Li, Jian-Guo Liu, Zibu Liu, Jianfeng Lu

We propose in this work RBM-SVGD, a stochastic version of Stein Variational Gradient Descent (SVGD) method for efficiently sampling from a given probability measure and thus useful for Bayesian inference.

Bayesian Inference

Butterfly-Net: Optimal Function Representation Based on Convolutional Neural Networks

1 code implementation18 May 2018 Yingzhou Li, Xiuyuan Cheng, Jianfeng Lu

Theoretical analysis of the approximation power of Butterfly-Net to the Fourier representation of input data shows that the error decays exponentially as the depth increases.

Block Basis Factorization for Scalable Kernel Matrix Evaluation

no code implementations3 May 2015 Ruoxi Wang, Yingzhou Li, Michael W. Mahoney, Eric Darve

Kernel methods are widespread in machine learning; however, they are limited by the quadratic complexity of the construction, application, and storage of kernel matrices.

BIG-bench Machine Learning

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