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引言在我国及国外进行的实地及室验室研究证明了在地震破裂前的阶段形变场内存在异常变化〔１，２〕。但预报地震的现状离最终达到的目标还很遥远。从经常在震后回顾性分析中识别出前兆异常过渡到震前依据观测到的异常变化实施真实的地震预报是存在许多困难的。原因是对解题计
Introduction Field and laboratory studies conducted in our country and abroad have demonstrated that there are abnormal changes in the deformation field during the pre-earthquake rupture [1,2]. However, it is still far from forecasting the status quo to the ultimate goal. There are many difficulties in implementing true earthquake prediction based on the observed abnormal changes, often from the retrospective analysis of the earthquake to identifying the precursor anomalies before the earthquake. The reason is to solve the problem