Learning nonlinear reduced models from data with operator inference

B Kramer, B Peherstorfer… - Annual Review of Fluid …, 2024 - annualreviews.org
This review discusses Operator Inference, a nonintrusive reduced modeling approach that
incorporates physical governing equations by defining a structured polynomial form for the …

Learning physics-based models from data: perspectives from inverse problems and model reduction

O Ghattas, K Willcox - Acta Numerica, 2021 - cambridge.org
This article addresses the inference of physics models from data, from the perspectives of
inverse problems and model reduction. These fields develop formulations that integrate data …

Multi-level convolutional autoencoder networks for parametric prediction of spatio-temporal dynamics

J Xu, K Duraisamy - Computer Methods in Applied Mechanics and …, 2020 - Elsevier
A data-driven framework is proposed towards the end of predictive modeling of complex
spatio-temporal dynamics, leveraging nested non-linear manifolds. Three levels of neural …

Data-driven reduced-order models via regularised operator inference for a single-injector combustion process

SA McQuarrie, C Huang, KE Willcox - … of the Royal Society of New …, 2021 - Taylor & Francis
This paper derives predictive reduced-order models for rocket engine combustion dynamics
via Operator Inference, a scientific machine learning approach that blends data-driven …

Learning physics-based reduced-order models for a single-injector combustion process

R Swischuk, B Kramer, C Huang, K Willcox - AIAA Journal, 2020 - arc.aiaa.org
This paper presents a physics-based data-driven method to learn predictive reduced-order
models (ROMs) from high-fidelity simulations and illustrates it in the challenging context of a …

Predictive reduced order modeling of chaotic multi-scale problems using adaptively sampled projections

C Huang, K Duraisamy - Journal of Computational Physics, 2023 - Elsevier
An adaptive projection-based reduced-order model (ROM) formulation is presented for
model-order reduction of problems featuring chaotic and convection-dominant physics. An …

Bayesian operator inference for data-driven reduced-order modeling

M Guo, SA McQuarrie, KE Willcox - Computer Methods in Applied …, 2022 - Elsevier
This work proposes a Bayesian inference method for the reduced-order modeling of time-
dependent systems. Informed by the structure of the governing equations, the task of …

Stability of discrete empirical interpolation and gappy proper orthogonal decomposition with randomized and deterministic sampling points

B Peherstorfer, Z Drmac, S Gugercin - SIAM Journal on Scientific Computing, 2020 - SIAM
This work investigates the stability of (discrete) empirical interpolation for nonlinear model
reduction and state field approximation from measurements. Empirical interpolation derives …

Conditionally parameterized, discretization-aware neural networks for mesh-based modeling of physical systems

J Xu, A Pradhan, K Duraisamy - Advances in Neural …, 2021 - proceedings.neurips.cc
Simulations of complex physical systems are typically realized by discretizing partial
differential equations (PDEs) on unstructured meshes. While neural networks have recently …

Reduced operator inference for nonlinear partial differential equations

E Qian, IG Farcas, K Willcox - SIAM Journal on Scientific Computing, 2022 - SIAM
We present a new scientific machine learning method that learns from data a
computationally inexpensive surrogate model for predicting the evolution of a system …