1 code implementation • 17 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.
no code implementations • 30 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.
no code implementations • 1 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.
1 code implementation • 28 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.
no code implementations • 26 May 2021 • Xiaoliang Wan, Kejun Tang
In the augmented KRnet, a fully nonlinear update is achieved in two iterations.
no code implementations • 20 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.
no code implementations • 21 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.
no code implementations • 24 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).