[PDF][PDF] Structure Preserving Neural Networks: A Case Study in the Entropy Closure of the Boltzmann Equation.

S Schotthöfer, T Xiao, M Frank, CD Hauck - ICML, 2022 - researchgate.net
In this paper, we explore applications of deep learning in statistical physics. We choose the
Boltzmann equation as a typical example, where neural networks serve as a closure to its …

Wasserstein-penalized Entropy closure: A use case for stochastic particle methods

M Sadr, NG Hadjiconstantinou, MH Gorji - Journal of Computational …, 2024 - Elsevier
We introduce a framework for generating samples of a distribution given a finite number of
its moments, targeted at particle-based solutions of kinetic equations and rarefied gas flow …

Probabilistic Back Analysis Based on Adam, Bayesian and Multi-output Gaussian Process for Deep Soft-Rock Tunnel

J Xu, C Yang - Rock Mechanics and Rock Engineering, 2023 - Springer
The uncertainty of surrounding rock mechanical parameters has much great influence on
design, construction and stability evaluation for tunnel engineering. However, the traditional …

Neural network-based, structure-preserving entropy closures for the Boltzmann moment system

S Schotthöfer, T Xiao, M Frank, CD Hauck - arXiv preprint arXiv …, 2022 - arxiv.org
This work presents neural network based minimal entropy closures for the moment system of
the Boltzmann equation, that preserve the inherent structure of the system of partial …

MESSY Estimation: Maximum-entropy based stochastic and symbolic density estimation

T Tohme, M Sadr, K Youcef-Toumi… - arXiv preprint arXiv …, 2023 - arxiv.org
We introduce MESSY estimation, a Maximum-Entropy based Stochastic and Symbolic
densitY estimation method. The proposed approach recovers probability density functions …

Data-driven, structure-preserving approximations to entropy-based moment closures for kinetic equations

WA Porteous, MP Laiu, CD Hauck - arXiv preprint arXiv:2106.08973, 2021 - arxiv.org
We present a data-driven approach to construct entropy-based closures for the moment
system from kinetic equations. The proposed closure learns the entropy function by fitting the …

Coupling kinetic and continuum using data-driven maximum entropy distribution

M Sadr, Q Wang, MH Gorji - Journal of Computational Physics, 2021 - Elsevier
An important class of multi-scale flow scenarios deals with an interplay between kinetic and
continuum phenomena. While hybrid solvers provide a natural way to cope with these …

Data-driven stochastic particle scheme for collisional plasma simulations

K Chung, F Fei, MH Gorji, P Jenny - Journal of Computational Physics, 2023 - Elsevier
We present a novel framework, enabled by machine learning (ML) trainable models, for
collisional plasma flow simulations governed by the Rosenbluth-Fokker-Planck (RFP) …

Moment method as a numerical solver: challenge from shock structure problems

Z Cai - Journal of Computational Physics, 2021 - Elsevier
We survey a number of moment hierarchies and test their performances in computing one-
dimensional shock structures. It is found that for high Mach numbers, the moment …

[HTML][HTML] Adam Bayesian Gaussian Process Regression with Combined Kernel-Function-Based Monte Carlo Reliability Analysis of Non-Circular Deep Soft Rock …

J Xu, Z Yan, Y Wang - Applied Sciences, 2024 - mdpi.com
Evaluating the reliability of deep soft rock tunnels is a very important issue to be solved. In
this study, we propose a Monte Carlo simulation reliability analysis method (MCS–RAM) …