no code implementations • 16 Mar 2024 • Christophe Bonneville, Xiaolong He, April Tran, Jun Sur Park, William Fries, Daniel A. Messenger, Siu Wun Cheung, Yeonjong Shin, David M. Bortz, Debojyoti Ghosh, Jiun-Shyan Chen, Jonathan Belof, Youngsoo Choi
Numerical solvers of partial differential equations (PDEs) have been widely employed for simulating physical systems.
no code implementations • 4 Jul 2023 • Jonghyuk Baek, Jiun-Shyan Chen
In the proposed method, a background reproducing kernel (RK) approximation defined on a coarse and uniform discretization is enriched by a neural network (NN) approximation under a Partition of Unity framework.
1 code implementation • 24 Nov 2022 • Xiaolong He, Youngsoo Choi, William D. Fries, Jonathan L. Belof, Jiun-Shyan Chen
A parametric adaptive greedy Latent Space Dynamics Identification (gLaSDI) framework is developed for accurate, efficient, and certified data-driven physics-informed greedy auto-encoder simulators of high-dimensional nonlinear dynamical systems.
no code implementations • 3 Sep 2022 • Xiaolong He, Qizhi He, Jiun-Shyan Chen
In this study, the applicability of the proposed approach is demonstrated by modeling nonlinear biological tissues.
no code implementations • 1 May 2022 • Xiaolong He, Jiun-Shyan Chen
Characterization and modeling of path-dependent behaviors of complex materials by phenomenological models remains challenging due to difficulties in formulating mathematical expressions and internal state variables (ISVs) governing path-dependent behaviors.
no code implementations • 28 Apr 2022 • Jonghyuk Baek, Jiun-Shyan Chen, Kristen Susuki
In this work, neural network-enhanced reproducing kernel particle method (NN-RKPM) is proposed, where the location, orientation, and shape of the solution transition near a localization is automatically captured by the NN approximation via a block-level neural network optimization.
no code implementations • 26 Apr 2022 • Xiaolong He, Youngsoo Choi, William D. Fries, Jon Belof, Jiun-Shyan Chen
To maximize and accelerate the exploration of the parameter space for the optimal model performance, an adaptive greedy sampling algorithm integrated with a physics-informed residual-based error indicator and random-subset evaluation is introduced to search for the optimal training samples on the fly.