Reduced basis methods for time-dependent problems

JS Hesthaven, C Pagliantini, G Rozza - Acta Numerica, 2022 - cambridge.org
Numerical simulation of parametrized differential equations is of crucial importance in the
study of real-world phenomena in applied science and engineering. Computational methods …

Symplectic model reduction of Hamiltonian systems using data-driven quadratic manifolds

H Sharma, H Mu, P Buchfink, R Geelen, S Glas… - Computer Methods in …, 2023 - Elsevier
This work presents two novel approaches for the symplectic model reduction of high-
dimensional Hamiltonian systems using data-driven quadratic manifolds. Classical …

Hamiltonian operator inference: Physics-preserving learning of reduced-order models for canonical Hamiltonian systems

H Sharma, Z Wang, B Kramer - Physica D: Nonlinear Phenomena, 2022 - Elsevier
This work presents a nonintrusive physics-preserving method to learn reduced-order models
(ROMs) of canonical Hamiltonian systems. Traditional intrusive projection-based model …

Physically constrained data‐driven correction for reduced‐order modeling of fluid flows

M Mohebujjaman, LG Rebholz… - International Journal for …, 2019 - Wiley Online Library
We have recently proposed a data‐driven correction reduced‐order model (DDC‐ROM)
framework for the numerical simulation of fluid flows, which can be formally written as …

Canonical and noncanonical Hamiltonian operator inference

A Gruber, I Tezaur - Computer Methods in Applied Mechanics and …, 2023 - Elsevier
A method for the nonintrusive and structure-preserving model reduction of canonical and
noncanonical Hamiltonian systems is presented. Based on the idea of operator inference …

Nonlinear embeddings for conserving Hamiltonians and other quantities with Neural Galerkin schemes

P Schwerdtner, P Schulze, J Berman… - SIAM Journal on Scientific …, 2024 - SIAM
This work focuses on the conservation of quantities such as Hamiltonians, mass, and
momentum when solution fields of partial differential equations are approximated with …

Preserving Lagrangian structure in data-driven reduced-order modeling of large-scale dynamical systems

H Sharma, B Kramer - Physica D: Nonlinear Phenomena, 2024 - Elsevier
This work presents a nonintrusive physics-preserving method to learn reduced-order models
(ROMs) of Lagrangian systems, which includes nonlinear wave equations. Existing intrusive …

Gradient preserving Operator Inference: Data-driven reduced-order models for equations with gradient structure

Y Geng, J Singh, L Ju, B Kramer, Z Wang - Computer Methods in Applied …, 2024 - Elsevier
Abstract Hamiltonian Operator Inference has been introduced in Sharma et al.(2022) to
learn structure-preserving reduced-order models (ROMs) for Hamiltonian systems. This …

Residual-Based Stabilized Reduced-Order Models of the Transient Convection–Diffusion–Reaction Equation Obtained Through Discrete and Continuous Projection

E Parish, M Yano, I Tezaur, T Iliescu - Archives of Computational Methods …, 2024 - Springer
Abstract Galerkin and Petrov–Galerkin projection-based reduced-order models (ROMs) of
transient partial differential equations are typically obtained by performing a dimension …

Model reduction techniques for parametrized nonlinear partial differential equations

NC Nguyen - Error Control, Adaptive Discretizations, and …, 2024 - books.google.com
2. Hyper-reduction methods 2.1 Parametrized integrals 2.2 Empirical quadrature methods
2.3 Empirical interpolation methods 2.4 Integral interpolation methods 3. First-order …