前兆异常的非线性识别与地震危险地点的判定
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摘要
利用多种描述复杂现象的非线性方法处理了多台多项多年的前兆观测资料，通过“场”、“源”特征差异性的对比求得地震危险地点是一个能量“振荡”型积累的地区，具体表现为它是在前兆异常演化过程中出现的异常从属度最高、自相似性变化最大、前兆分维数下降最多的地区，而且还是在地震活动过程中出现的一个熵值相对较低的地区。研究结果还表明，震中位置的不确定性随着发震时刻的逼近而不断减弱
Precursor data of many observatories and many items and many years are processed with non linear method which describes complex phenomena, and contrast and comparison are made between character of field and that of source The results show that earthquake risk area is the areas of energy “oscillating”type accumulation The concrete behaviour is that the earthquake risk area is the areas of maximum anomaly fuzzy subordinate degree,maximum variance of self similarity and the maximum drop of precursor fraction Moreover,the earthquake risk area is the low seismic entropy area The research results show that the uncertainity of epicenter position decreases with the approaching of earthquake
Precursor data of many observatories and many items and many years are processed with non linear method which describes complex phenomena, and contrast and comparison are made between character of field and that of source The results show that earthquake risk area is the areas of energy “oscillating”type accumulation The concrete behaviour is that the earthquake risk area is the areas of maximum anomaly fuzzy subordinate degree,maximum variance of self similarity and the maximum drop of precursor fraction Moreover,the earthquake risk area is the low seismic entropy area The research results show that the uncertainity of epicenter position decreases with the approaching of earthquake
引文
1郑熙铭，冯德益，田山．地震前兆异常的动态从属函数及其特征指标的研究．地震，1994；（1）：36～432冯德益，林命周，顾瑾平等．模糊地震学．北京：地震出版社，1992：244～2463郑熙铭，冯德益，朱桂兰等．模糊分维与模糊自相似性在地震前兆异常识别和分析中的应用．见：辛厚文主编，分形理论及其应用．合肥：中国科技大学出版社，1993：408～4124朱传镇，王琳瑛．地震活动熵值及其在地震危险性估计中的应用．地震，1988；（2）：32～365郑熙铭，冯德益．强震前兆异常的模糊识别与地震预报．地震，1991；（3）：12～216郑熙铭，冯德益．地震前兆模糊分维特征的研究．西北地震学报，1992；14（3）：13～20
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