Survey of optimization algorithms in modern neural networks

R Abdulkadirov, P Lyakhov, N Nagornov - Mathematics, 2023 - mdpi.com
The main goal of machine learning is the creation of self-learning algorithms in many areas
of human activity. It allows a replacement of a person with artificial intelligence in seeking to …

Solving Allen-Cahn and Cahn-Hilliard equations using the adaptive physics informed neural networks

CL Wight, J Zhao - arxiv preprint arxiv:2007.04542, 2020 - arxiv.org
Phase field models, in particular, the Allen-Cahn type and Cahn-Hilliard type equations,
have been widely used to investigate interfacial dynamic problems. Designing accurate …

A new class of efficient and robust energy stable schemes for gradient flows

J Shen, J Xu, J Yang - SIAM Review, 2019 - SIAM
We propose a new numerical technique to deal with nonlinear terms in gradient flows. By
introducing a scalar auxiliary variable (SAV), we construct efficient and robust energy stable …

Improving the accuracy and consistency of the scalar auxiliary variable (SAV) method with relaxation

M Jiang, Z Zhang, J Zhao - Journal of Computational Physics, 2022 - Elsevier
The scalar auxiliary variable (SAV) method was introduced by Shen et al. in [36] and has
been broadly used to solve thermodynamically consistent PDE problems. By utilizing scalar …

Numerical approximations for the molecular beam epitaxial growth model based on the invariant energy quadratization method

X Yang, J Zhao, Q Wang - Journal of Computational Physics, 2017 - Elsevier
Abstract The Molecular Beam Epitaxial model is derived from the variation of a free energy,
that consists of either a fourth order Ginzburg–Landau double well potential or a nonlinear …

Energy-decaying extrapolated RK--SAV methods for the Allen--Cahn and Cahn--Hilliard equations

G Akrivis, B Li, D Li - SIAM Journal on Scientific Computing, 2019 - SIAM
We construct and analyze a class of extrapolated and linearized Runge--Kutta (RK)
methods, which can be of arbitrarily high order, for the time discretization of the Allen--Cahn …

Numerical approximations for a three-component Cahn–Hilliard phase-field model based on the invariant energy quadratization method

X Yang, J Zhao, Q Wang, J Shen - Mathematical Models and …, 2017 - World Scientific
How to develop efficient numerical schemes while preserving energy stability at the discrete
level is challenging for the three-component Cahn–Hilliard phase-field model. In this paper …

Positivity-preserving, energy stable numerical schemes for the Cahn-Hilliard equation with logarithmic potential

W Chen, C Wang, X Wang, SM Wise - Journal of Computational Physics: X, 2019 - Elsevier
In this paper we present and analyze finite difference numerical schemes for the Cahn-
Hilliard equation with a logarithmic Flory Huggins energy potential. Both first and second …

The exponential scalar auxiliary variable (E-SAV) approach for phase field models and its explicit computing

Z Liu, X Li - SIAM Journal on Scientific Computing, 2020 - SIAM
In this paper, we consider an exponential scalar auxiliary variable (E-SAV) approach to
obtain energy stable schemes for a class of phase field models. This novel auxiliary variable …

Generalized SAV-exponential integrator schemes for Allen--Cahn type gradient flows

L Ju, X Li, Z Qiao - SIAM journal on numerical analysis, 2022 - SIAM
The energy dissipation law and the maximum bound principle (MBP) are two important
physical features of the well-known Allen--Cahn equation. While some commonly used first …