经验模态分解法提取地磁脉动  

Picking up geomagnetic pulsation using empirical mode decomposition

作　　者：张敏[1] 王喜珍[2] 赵石柱[1] 

机构地区：[1]新疆维吾尔自治区地震局,中国乌鲁木齐830011 [2]中国地震局地球物理研究所,中国北京100081

出　　处：《地震地磁观测与研究》2014年第1期114-120,共7页Seismological and Geomagnetic Observation and Research

基　　金：新疆地震科学基金资助(201204);课题名称:地磁台站磁通门磁力仪探头定向角度与测量准确度关系的试验与研究

摘　　要：选取磁通门磁力仪数据,利用经验模态分解法提取地磁脉动,并与传统小波分解法提取的地磁脉动方法作对比,分析子午链区域几个地磁台站提取的地磁脉动的纬度效应和经度效应。结果表明,经验模态分解法提取的地磁脉动形态清晰,易于辨识,与小波法相比,不用选择基函数,更适合于分析非稳态信号。In this paper,the geomagnetic pulsation in selected GM4 original data is picked up using empirical mode decomposition method and compared with those getten from wavelet decom-position method.We also analyze the latitude effect and longitude effect of many geomagnetic stations in meridian chain region.The result shows that the shape of geomagnetic pulsation which picked up by empirical mode decomposition method is clear and very easy to recognize.In contrast to wavelet method,empirical mode decomposition method do not need to choose base function,much more suitable for analyze nonsteady signal.

关 键 词：地磁脉动 经验模态分解 子午链 

分 类 号：P318[天文地球—固体地球物理学]