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采用模糊数学方法建立的动态从属函数，将地震前兆异常信息化作（０～１）之间的无量纲值，从综合的角度对常熟５１级地震震前前兆异常进行时、空动态演化的追踪分析研究，对进入中短期孕震阶段的前兆异常空间特征进行了探索。
The dynamic membership functions established by fuzzy mathematics are used to make the anomaly information of earthquake precursors into the dimensionless values between (0 ~ 1). From a comprehensive point of view, the anomalous precursory anomalies before and after Changzheng 51 earthquake are evolved in time and space , The paper explores the spatial features of precursory anomalies entering the short-term earthquakes.