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一、引言模糊数学以集合论为基础,它突破了普通集合论中元素对集合的绝对化从属关系,承认在“属于”“不属于”这两种状态之外存在着中间过渡状态,这样便把处于过渡状态的许多信息保存下来,为地震活动性的综合评价提供了逻辑演绎的形式系统。当前在地震预报中,由于我国地震类型多、地质构造复杂、地震前兆所表现的形式多种多样,因此实难掌握其规律性。实践证明,通过多种方法的综合预报,采用多因素的分析、类比、统计、综合可以认识某些地震的规律性,提高预报的成功率;然而,运
I. INTRODUCTION Fuzzy mathematics is based on set theory, which breaks through the absolute affiliation of elements in a general set theory and admits that there is an intermediate transition state beyond the two states of “belonging to” and “not belonging to” The preservation of many information in the transitional state provides a formal system of logical deduction for the comprehensive evaluation of seismicity. In the current earthquake prediction, due to the large number of earthquakes in our country, complex geological structures and the various forms of earthquake precursors, it is hard to grasp its regularity. Practice has proved that through the comprehensive forecasting of many kinds of methods, adopting the multi-factor analysis, analogy, statistics and synthesis, we can know the regularity of some earthquakes and improve the success rate of forecasting. However,