Physics-informed regularization and structure preservation for learning stable reduced models from data with operator inference
Physics-informed regularization and structure preservation for learning stable reduced models from data with operator inference
复制标题
基于物理的正则化和结构保存,用于通过算子推理从数据中学习稳定的简化模型
DOI:
10.1016/j.cma.2022.115836
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发表时间:
2023
影响因子:
7.2
通讯作者:
Peherstorfer, Benjamin
中科院分区:
文献类型:
--
作者:
Sawant, Nihar;Kramer, Boris;Peherstorfer, Benjamin
Operator inference learns low-dimensional dynamical-system models with polynomial nonlinear terms from trajectories of high-dimensional physical systems (non-intrusive model reduction). This work focuses on the large class of physical systems that can be well described by models with quadratic and cubic nonlinear terms and proposes a regularizer for operator inference that induces a stability bias onto learned models. The proposed regularizer is physics informed in the sense that it penalizes higher-order terms with large norms and so explicitly leverages the polynomial model form that is given by the underlying physics. This means that the proposed approach judiciously learns from data and physical insights combined, rather than from either data or physics alone. Additionally, a formulation of operator inference is proposed that enforces model constraints for preserving structure such as symmetry and definiteness in linear terms. Numerical results demonstrate that models learned with operator inference and the proposed regularizer and structure preservation are accurate and stable even in cases where using no regularization and Tikhonov regularization leads to models that are unstable.
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DOI:
10.1137/16m1086637
发表时间:
2016
期刊:
Multiscale Model. Simul.
影响因子:
--
作者:
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通讯作者:
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2010
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通讯作者:
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影响因子:
3.1
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1989
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影响因子:
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通讯作者:
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DOI:
10.1016/j.cma.2020.113433
发表时间:
2020-12-01
影响因子:
7.2
作者:
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通讯作者:
Willcox, Karen