This paper introduces a new method to process quasi-periodic signals.This method divides a signal into sub-signals called basic operation unit(BOU) using signal's self-coherence property,determines the same components of these sub-signals with time domain's harmonization and clustering,then Optimum Matching Frequency Method(OMFM) is used to extract typical signal parameters from these sub-signals.Mechanical vibration and acoustic signals were acquired from drilling site by a multi-channel sonic and vibratio...
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