文章基本信息

标题：Physics informed machine learning: Seismic wave equation
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作者：Sadegh Karimpouli ; Pejman Tahmasebi
期刊名称：Geoscience Frontiers
印刷版ISSN：1674-9871
出版年度：2020
卷号：11
期号：6
页码：1993-2001
DOI：10.1016/j.gsf.2020.07.007
语种：English
出版社：Elsevier
摘要：AbstractSimilar to many fields of sciences, recent deep learning advances have been applied extensively in geosciences for both small- and large-scale problems. However, the necessity of using large training data and the ‘black box’ nature of learning have limited them in practice and difficult to interpret. Furthermore, including the governing equations and physical facts in such methods is also another challenge, which entails either ignoring the physics or simplifying them using unrealistic data. To address such issues, physics informed machine learning methods have been developed which can integrate the governing physics law into the learning process. In this work, a 1-dimensional (1D) time-dependent seismic wave equation is considered and solved using two methods, namely Gaussian process (GP) and physics informed neural networks. We show that these meshless methods are trained by smaller amount of data and can predict the solution of the equation with even high accuracy. They are also capable of inverting any parameter involved in the governing equation such as wave velocity in our case. Results show that the GP can predict the solution of the seismic wave equation with a lower level of error, while our developed neural network is more accurate for velocity (P- and S-wave) and density inversion.Graphical abstractDisplay OmittedHighlights•A hybrid machine learning and physics-based method is presented.•This method can take advantage of the governing physics laws.•Various parameters in governing equations can be inverted.•The results indicate a superior performance for inverting of wave velocity.
关键词：KeywordsenGaussian process (GP)Physics informed machine learning (PIML)Seismic waveOptimization