• improve hvnr technique by using wavelet transform

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1013
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the spectral ratio between horizontal and vertical components noise (h/v ratio) of microtremors has been used to estimate fundamental resonance frequency of the site. in this study we investigate the application of the wavelet analysis to improve the (hvnr) technique for site effect estimation. wavelet analysis has been widely used in the last decade for its capacity to localise the signal in both the time and frequency domains. this property, which derived directly from multiresolution analysis provide us the ability to decompose a signal in a well localized set of coefficients and identify the non-stationary portions of it.in the present study we use the wt in order to eliminate the non-stationarities in microtremor signals before we calculate the spectrum of each one using conventional fft algorithms.

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