摘要
该文在对地电场信号及地电阻率人工供电干扰信号的时频特征进行分析的基础上,提出了小波域阈值滤波方法,对地电场秒采样信号中叠加地电阻率人工供电干扰信号进行了分析和处理,处理产生的误差在地电场观测的允许误差范围之内。
Based on the analysis of the characteristics of geoelectric field signals and artifi- cial electricity signals in apparent resistivity measurements in time domain and frequency domain, a new method of wavelet domain threshold de-noising is proposed in this paper. This method was applied to processing the geoelectric field signals added by simulated artificial electricity signals in laboratory. It is showed that in the experiments this method has good performance and the filtering error is within the allowed range of geoelectric field observation.
出处
《地震》
CSCD
北大核心
2009年第2期57-63,共7页
Earthquake
基金
中国地震局地震预测研究所基本科研业务专项(0207690220)
关键词
地电场
低电阻率
供电干扰
小波分析
小波域阈值
Geoelectric field
Apparent resistivity
Artificial electric interference
Wavelet transform
