Estimates the power spectral densities (PSDs) using both the generalized Ridge Regression (GRR) method [Hoerl, Kennard] and the ordinary RR method with loading level decided by the harmonic mean (HKB) and a Bayesian estimator (LW) for deciding the di

Including principal component analysis, factor analysis, Bayesian analysis, Using a large number of finite element method to solve partial differential equations, For lack of EMD.