摘要
阵列声波测井波形是具有时变特性(或称非稳态性质)的典型信号,对于这类信号。不仅需要从总体上了解它的频率成分,而且还需要了解每一时刻信号中所包含的频率成分。介绍了非平稳信号时频联合分析中的重排方法。该方法的关键之处在于将代表信号局部能量分布的非线性卷积的值由卷积核的几何中心重排到其质量中心,从而提高时频表示的可读性。给出了几个例子来说明重排方法的应用效果。最后介绍了重排方法在阵列声波测井信号处理中的应用。
A reassignment method for nonstationary time--frequency joint analysis is introduced. This method creates a modified version of a representation by moving its values away from where they are computed, so as to produce a better localization of the signal components and improve the readability of the representation. A few examples are presented to show the effects of this method. Finally, the application of this method in array acoustic logging signal processing is proposed.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2007年第5期1042-1046,1054,共6页
Journal of Jilin University：Earth Science Edition
基金
"九五"国家重大科学工程项目(计高技[1999]1423号)
关键词
时频分析
声波测井
重排方法
time-- frequency analysis
array acoustic logging
reassignment
