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- W2393037458 abstract "The moving window method,Kameda multi-filter and Nakayama narrow band-pass filter were applied to obtained the El Centro NS evolutionary power spectra evaluation.The comparison shows that the Nakayama method is the best in reflecting the non-stationary characteristics of this earthquake wave.The investigation results on the differences among band-limited white noise process,artificial earthquake accelerogram with non-stationary amplitude and actual earthquake record revealed that these differences can be explained from the view point of evolutionary spectra distribution in time-frequency domain.Furthermore,on the basis of Nakayama method a new model for generating earthquake accelerogram was proposed.According to this model,the non-stationary characteristics both in amplitude and frequency of an earthquake accelerogram are related to not only the evolutionary spectrum but also the time-dependent phase angle.The comparison of evolutionary power spectra and time-varying phase angles of actual earthquake record with the artificial accelerograms produced by Kameda model combined with the proposed model demonstrates that the spectra and phase angle are non-stationary both in time and frequency domains,which are essentially identical to the characteristics of actual earthquake record." @default.
- W2393037458 created "2016-06-24" @default.
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- W2393037458 date "2007-01-01" @default.
- W2393037458 modified "2023-09-22" @default.
- W2393037458 title "Study on evolutionary power spectra of non-stationary earthquake accelerograms" @default.
- W2393037458 hasPublicationYear "2007" @default.
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