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- W4381686075 abstract "Building reduced-order models (ROMs) is essential for efficient forecasting and control of complex dynamical systems. Recently, autoencoder-based methods for building such models have gained significant traction, but their demand for data limits their use when the data is scarce and expensive. We propose aiding a model's training with the knowledge of physics using a collocation-based physics-informed loss term. Our innovation builds on ideas from classical collocation methods of numerical analysis to embed knowledge from a known equation into the latent-space dynamics of a ROM. We show that the addition of our physics-informed loss allows for exceptional data supply strategies that improves the performance of ROMs in data-scarce settings, where training high-quality data-driven models is impossible. Namely, for a problem of modeling a high-dimensional nonlinear PDE, our experiments show [Formula: see text] 5 performance gains, measured by prediction error, in a low-data regime, [Formula: see text] 10 performance gains in tasks of high-noise learning, [Formula: see text] 100 gains in the efficiency of utilizing the latent-space dimension, and [Formula: see text] 200 gains in tasks of far-out out-of-distribution forecasting relative to purely data-driven models. These improvements pave the way for broader adoption of network-based physics-informed ROMs in compressive sensing and control applications." @default.
- W4381686075 created "2023-06-23" @default.
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- W4381686075 date "2023-06-22" @default.
- W4381686075 modified "2023-09-23" @default.
- W4381686075 title "Physics-informed neural ODE (PINODE): embedding physics into models using collocation points" @default.
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- W4381686075 doi "https://doi.org/10.1038/s41598-023-36799-6" @default.
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