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- W4281942897 abstract "Nonlinear dynamics is ubiquitous in nature and commonly seen in various science and engineering disciplines. Distilling analytical expressions that govern nonlinear dynamics from limited data remains vital but challenging. To tackle this fundamental issue, we propose a novel Symbolic Physics Learner (SPL) machine to discover the mathematical structure of nonlinear dynamics. The key concept is to interpret mathematical operations and system state variables by computational rules and symbols, establish symbolic reasoning of mathematical formulas via expression trees, and employ a Monte Carlo tree search (MCTS) agent to explore optimal expression trees based on measurement data. The MCTS agent obtains an optimistic selection policy through the traversal of expression trees, featuring the one that maps to the arithmetic expression of underlying physics. Salient features of the proposed framework include search flexibility and enforcement of parsimony for discovered equations. The efficacy and superiority of the SPL machine are demonstrated by numerical examples, compared with state-of-the-art baselines." @default.
- W4281942897 created "2022-06-13" @default.
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- W4281942897 date "2022-05-25" @default.
- W4281942897 modified "2023-09-26" @default.
- W4281942897 title "Symbolic Physics Learner: Discovering governing equations via Monte Carlo tree search" @default.
- W4281942897 doi "https://doi.org/10.48550/arxiv.2205.13134" @default.
- W4281942897 hasPublicationYear "2022" @default.
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