应用小波包识别宁夏及邻区的地震和爆破  

Using Wavelet Packet to Discriminate Earthquakes and Explosions in Ningxia and Neighboring Areas

作　　者：曾宪伟[1] 赵卫明[1] 盛菊琴[1] 莘海亮[2] 

机构地区：[1]宁夏回族自治区地震局,银川750001 [2]中国地震局兰州地震研究所,兰州730000

出　　处：《地震研究》2008年第2期142-148,共7页Journal of Seismological Research

基　　金：国家“十一五”科技支撑计划(2006BAC01B03-04-02)资助

摘　　要：将小波变换理论应用于宁夏及邻区的地震和爆破的识别,利用小波包变换系数与射线能量的关系,计算了射线所包含的低频成分和高频成分的能量之比。结果表明,当分解尺度j=1时,对于地震信号,ln(Ω01/Ω11)的值一般小于3,对于爆破信号,ln(Ω01/Ω11)的值一般大于3。We calculated the energy ratio of low frequency to high frequency of ray based on the relation between ray energy and wavelet packet transform coefficients. The result shows that while decomposition scale is 1, the value ln（Ω0^1/Ω1^1） is generally less than 3.0 for earthquakes, but more than 3.0 for explosions. It is suggested that wavelet transform theory can be applied to the discrimination of the earthquakes and explosions in Ningxia and neighboring areas.

关 键 词：小波包 变换系数 能量 地震 爆破 识别 

分 类 号：P315[天文地球—地震学] TD235[天文地球—固体地球物理学]