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《Progress in Geophysics》 2007-06
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Application of time-frequency analysis method for seismic imaging data

SHAN Na-lin,CHENG Zhi-ping,Ding Yan-li(Department of Resources and Environmental Engineering,Guilin University of Technology,Guilin 541004,China)  
This paper deals with the interpretation of seismic imaging data by the time-frequency analysis method.The time and space distribution of the seismic spectrum is obtained by short-time FT transform.According to the relationship of media and its seismic spectrum,by the comparison of the known geological section and the related distribution of the seismic spectrum,the effectiveness of the time-frequency analysis method is demonstrated.By use of time-frequency analysis, the information of geological stratum and structures contained in seismic spectrum is extracted and then serves as the important reference in the processing and interpretation of seismic imaging data.Several history cases on determining subsurface rocks,outlining the distribution of thin clay layers,detecting underground cavities and allocating defects in concrete frames by combined use of time domain and spectra domain analysis of seismic imaging data are presented.It is found that the precision and correction of interpretation of seismic imaging data can be improved by combined application of time and spectra information.
【Fund】: 广西教育厅高校科研项目资助
【CateGory Index】: P631.4
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