Search Results for author: Kejun Tang

Found 8 papers, 2 papers with code

Deep adaptive sampling for surrogate modeling without labeled data

1 code implementation17 Feb 2024 Xili Wang, Kejun Tang, Jiayu Zhai, Xiaoliang Wan, Chao Yang

In this work, we present a deep adaptive sampling method for surrogate modeling ($\text{DAS}^2$), where we generalize the deep adaptive sampling (DAS) method [62] [Tang, Wan and Yang, 2023] to build surrogate models for low-regularity parametric differential equations.

Adversarial Adaptive Sampling: Unify PINN and Optimal Transport for the Approximation of PDEs

no code implementations30 May 2023 Kejun Tang, Jiayu Zhai, Xiaoliang Wan, Chao Yang

The key idea is to use a deep generative model to adjust random samples in the training set such that the residual induced by the approximate PDE solution can maintain a smooth profile when it is being minimized.

Dimension-reduced KRnet maps for high-dimensional Bayesian inverse problems

no code implementations1 Mar 2023 Yani Feng, Kejun Tang, Xiaoliang Wan, Qifeng Liao

We present a dimension-reduced KRnet map approach (DR-KRnet) for high-dimensional Bayesian inverse problems, which is based on an explicit construction of a map that pushes forward the prior measure to the posterior measure in the latent space.

Decoder Vocal Bursts Intensity Prediction

DAS-PINNs: A deep adaptive sampling method for solving high-dimensional partial differential equations

1 code implementation28 Dec 2021 Kejun Tang, Xiaoliang Wan, Chao Yang

In this work we propose a deep adaptive sampling (DAS) method for solving partial differential equations (PDEs), where deep neural networks are utilized to approximate the solutions of PDEs and deep generative models are employed to generate new collocation points that refine the training set.

Augmented KRnet for density estimation and approximation

no code implementations26 May 2021 Xiaoliang Wan, Kejun Tang

In the augmented KRnet, a fully nonlinear update is achieved in two iterations.

Density Estimation

Adaptive deep density approximation for Fokker-Planck equations

no code implementations20 Mar 2021 Kejun Tang, Xiaoliang Wan, Qifeng Liao

In this paper we present an adaptive deep density approximation strategy based on KRnet (ADDA-KR) for solving the steady-state Fokker-Planck (F-P) equations.

Tensor Train Random Projection

no code implementations21 Oct 2020 Yani Feng, Kejun Tang, Lianxing He, Pingqiang Zhou, Qifeng Liao

This work proposes a novel tensor train random projection (TTRP) method for dimension reduction, where pairwise distances can be approximately preserved.

Dimensionality Reduction

D3M: A deep domain decomposition method for partial differential equations

no code implementations24 Sep 2019 Ke Li, Kejun Tang, Tianfan Wu, Qifeng Liao

A state-of-the-art deep domain decomposition method (D3M) based on the variational principle is proposed for partial differential equations (PDEs).

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