迭代累积平方和算法与自回归赤池准则算法在地震信号到时估算中的比较研究  

A comparative study between ICSS and AR-AIC algorithms on onset time estimation for seismic signals

作　　者：何燕[1] 靳平[1] 肖卫国[1] 王红春[1] 

机构地区：[1]西北核技术研究所,中国西安710024

出　　处：《地震学报》2014年第2期209-219,339,共11页Acta Seismologica Sinica

基　　金：国家自然科学基金项目(41174033)资助

摘　　要：介绍了不同于自回归赤池准则算法(AR-AIC)的另外一种到时估算方法———累积和法(CUSUM).作为一种序贯分析方法,累积和法主要用于满足一定噪声假设且相对稳定的数据序列中,用以检测其发生异常改变的信号到时位置.其中重点介绍了改进后的累积和算法———迭代累积平方和算法(ICSS)的基本原理及其在区域震到时估算方面的应用实例,并将其与AR-AIC算法的到时估算结果进行了比较分析.分析结果表明,相对于AR-AIC算法,ICSS算法在对区域震S波和Lg波的到时估算方面具有估算误差小、计算时间短的优势,具有一定的应用价值.This paper introduces another onset time estimation method, cumula- tive sum algorithm （CUSUM for short）, which is different from AR-AIC algo- rithm. As a sequential analysis method, CUSUM is mainly used to detect the onset time of anomalous signals with the assumption that background noises are quasi-stationary. This paper mainly introduces the improved CUSUM method, iterative cumulative sums of squares algorithm （ICSS for short） and its applica- tion to onset time estimation for regional seismic signals. The results indicate that, in comparison with AR-AIC algorithm, ICSS algorithm has a certain ad- vantage of minor error in estimating onset times of regional S and Lg waves, and it takes less time to compute than AR-AIC algorithm.

关 键 词：地震信号 累积和 到时估算 时效性对比 

分 类 号：P315.31[天文地球—地震学]