小波包变换在重叠地震信号分离中的应用  

The Application of Wavelet Packages Transform in Separating Overlapped Eart hquake Signals

作　　者：郑宜珍[1] 秦前清[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,武汉430079

出　　处：《计算机工程与应用》2004年第26期176-177,215,共3页Computer Engineering and Applications

基　　金：国家自然科学海量地震数据压缩的形态学方法

摘　　要：地震资料处理中常会遇到重叠地震信号,而如何将这些重叠数据分离开,是一个有待研究的课题。论文利用小波包同时在频域和时域具有良好的局部化性质,采用Shannon熵标准来选取最优小波包基,确定了重叠爆破的延迟时间,从而成功地对重叠地震信号进行了分离。The overlapped earthquake signals often appear in seismic data processi ng .It is a demanding task to separate the overlapped earthquake datum.Based on t he good localizing quality of wavelet packages in frequency region and time reg ion at the same time ,this paper selects the best basis in wavelet packages by using Shannon entropy criterion,and finds the delay time of the overlapped ea rthquake signals,and so separates them successfully.

关 键 词：小波包变换 重叠地震信号分离 地震资料处理 最优小波包基 Shannon熵标准 

分 类 号：P631.443[天文地球—地质矿产勘探]