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《Coal Geology & Exploration》 2013-01
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Experiments and analysis in seismic data processing with several kinds of reassignment methods

ZHOU Zhusheng,CHEN Gaoxiang(School of Geosciences and Info-Physics,Central South University,Changsha 410083,China)  
The main idea of reassignment method in time-frequency analysis is presented and some expressions used to compute the accurate location of the local energy gravity center are given;then two numerical experiments are presented to show how these reassignment methods work individually as used to process single-trace seismic data.Based on the experiments,some conclusions are drawn that the reassignment methods can not only effectively reduce cross-terms,but also lead to a good time-frequency concentration.Compared with others,the reassignment spectrogram has the best potential for ideal time-frequency concentration,especially when the dominant frequencies are required to be underlined.The reassignment smoothing pseudo Wigner-Ville distribution can also achieve perfect effects though it is a little worse than the former one.The pseudo Margenau-Hill distribution is the worst of the three,since it fails to relocate the dispersive energy to the calculated center.A pretty precise instantaneous frequency section can be produced when the reassignment method is applied to deal with seismic signals.
【CateGory Index】: TN911.7
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