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ISSN 2096-7780 CN 10-1665/P

定点形变数据同震响应检测深度学习模型

Deep Learning Model for Co-seismic Response Detection of Fixed-point Deformation Data

  • 摘要: 定点形变数据的同震响应识别目前主要依靠人工拣选,尚未见有自动检测方法投入应用。本文提出专门针对定点形变数据的同震响应检测深度学习模型,该模型用于在单台VP宽频带倾斜仪秒数据上快速准确地检测同震响应信号。我们使用迁移学习技术构建模型,引入3种代表性测震数据地震检测预训练模型作为特征提取器,将其在测震数据上地震检测的知识和能力迁移到定点形变数据上,设计和调整了配套的数据转换器和分类器。真实观测数据上的测试表明模型具备良好的检测性能,在蓟县台连续数据上的应用证明模型不仅能够检测出人工记录的所有同震响应事件,还能够发现更多人工未能识别的事件,精确率不低于75%,检测效率、检测能力和一致性相比传统人工处理有了很大的提升。

     

    Abstract: Co-seismic response identification of fixed-point deformation data currently relies on manual picking, and no automatic co-seismic response detection method has yet been put into application. The paper propose the first deep learning model for co-seismic response detection of fixed-point deformation data in China, which is used to detect co-seismic response signals quickly and accurately on the second data of a single Vertical Pendulum broadband tiltmeter. The model is constructed using the transfer learning technique, introducing three representative pre-trained models for earthquake detection on seismic data as feature extractors, migrating their knowledge and capabilities of earthquake detection on seismic data to fixed-point deformation data, and then designing and adapting the supporting data converters and classifiers. Tests on real observational data show that the model has good detection performance. The application on the continuous data from Jixian station proves that the model is not only able to detect all the co-seismic response events recorded manually, but also able to find more events that were not recognized manually, with an accuracy rate of no less than 75%, and the detection efficiency, detection capability and consistency are greatly improved compared with the traditional manual processing.

     

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