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• W3040708241 abstract "We present an algorithm to learn the relevant latent variables of a large-scale discretized physical system and predict its time evolution using thermodynamically-consistent deep neural networks. Our method relies on sparse autoencoders, which reduce the dimensionality of the full order model to a set of sparse latent variables with no prior knowledge of the coded space dimensionality. Then, a second neural network is trained to learn the metriplectic structure of those reduced physical variables and predict its time evolution with a so-called structure-preserving neural network. This data-based integrator is guaranteed to conserve the total energy of the system and the entropy inequality, and can be applied to both conservative and dissipative systems. The integrated paths can then be decoded to the original full-dimensional manifold and be compared to the ground truth solution. This method is tested with two examples applied to fluid and solid mechanics." @default.
• W3040708241 created "2020-07-16" @default.
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• W3040708241 date "2021-06-01" @default.
• W3040708241 modified "2023-10-14" @default.
• W3040708241 title "Deep learning of thermodynamics-aware reduced-order models from data" @default.
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• W3040708241 doi "https://doi.org/10.1016/j.cma.2021.113763" @default.
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