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- W4361021320 abstract "Ground-motion model (GMM) is the basis of many earthquake engineering studies. In this study, a novel physics-informed symbolic learner (PISL) method based on the Nest Generation Attenuation-West2 database is proposed to automatically discover mathematical equation operators as symbols. The sequential threshold ridge regression algorithm is utilized to distill a concise and interpretable explicit characterization of complex systems of ground motions. In addition to the basic variables retrieved from previous GMMs, the current PISL incorporates two a priori physical conditions, namely, distance and amplitude saturation. GMMs developed using the PISL, an empirical regression method (ERM), and an artificial neural network (ANN) are compared in terms of residuals and extrapolation based on obtained data of peak ground acceleration and velocity. The results show that the inter- and intra-event standard deviations of the three methods are similar. The functional form of the PISL is more concise than that of the ERM and ANN. The extrapolation capability of the PISL is more accurate than that of the ANN. The PISL-GMM used in this study provide a new paradigm of regression that considers both physical and data-driven machine learning and can be used to identify the implied physical relationships and prediction equations of ground motion variables in different regions." @default.
- W4361021320 created "2023-03-30" @default.
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- W4361021320 date "2023-03-23" @default.
- W4361021320 modified "2023-10-17" @default.
- W4361021320 title "Physics Symbolic Learner for Discovering Ground-Motion Models Via NGA-West2 Database" @default.
- W4361021320 doi "https://doi.org/10.48550/arxiv.2303.14179" @default.
- W4361021320 hasPublicationYear "2023" @default.
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