TY - JOUR
T1 - Learning PDEs from Data on Closed Surfaces with Sparse Optimization
AU - Sun , Zhengjie
AU - Ling , Leevan
AU - Zhang , Ran
JO - Communications in Computational Physics
VL - 2
SP - 289
EP - 314
PY - 2025
DA - 2025/02
SN - 37
DO - http://doi.org/10.4208/cicp.OA-2024-0112
UR - https://global-sci.org/intro/article_detail/cicp/23865.html
KW - Meshless methods, data-driven modeling, sparse optimization, surface PDE.
AB - <p style="text-align: justify;">Discovering underlying partial differential equations (PDEs) from observational data has important implications across fields. It bridges the gap between theory
and observation, enhancing our understanding of complex systems in applications.
In this paper, we propose a novel approach, termed physics-informed sparse optimization (PIS), for learning surface PDEs. Our approach incorporates both $L_2$ physics-informed model loss and $L_1$ regularization penalty terms in the loss function, enabling
the identification of specific physical terms within the surface PDEs. The unknown
function and the differential operators on surfaces are approximated by some extrinsic meshless methods. We provide practical demonstrations of the algorithms including linear and nonlinear systems. The numerical experiments on spheres and various
other surfaces demonstrate the effectiveness of the proposed approach in simultaneously achieving precise solution prediction and identification of unknown PDEs.</p>