Patent ID: 7464006
Filing Date: 2008-12-09
Classification: G06Q

Abstract:
1. A computer implemented method of extracting trend data from a non-stationary time varying phenomena, said method comprising the steps of: inputting a representation of a non-stationary time varying phenomenon; recursively sifting said representation using Empirical Mode Decomposition (EMD) to extract an intrinsic mode function (IMF) indicative of an intrinsic oscillatory mode wherein said IM-F is a proto-IMF until said proto-IMF has a zero mean; filtering said recursively sifted representation including the step of identifying cut off frequencies; wherein identified said cut off frequencies identify one or more IMF indicating variability of said non-stationary time varying phenomena; rectifying said identified one or more IMFs; normalizing rectified said identified ones; low pass filtering said representation responsive to said cut off frequencies; extracting trend data from said filtered representation; and displaying said extracted trend data.