Fig. 3
From: Correlation-aided method for identification and gradation of periodicities in hydrologic time series
The periodicity identification efficiency (IE) of four methods power spectrum method (PSM), harmonic analysis method (HAM), maximum entropy method (MEM) and moving correlation coefficient-based analysis (MCCA) under different periodic component parameters a half-amplitude B (the abscissa axis M refers to the coefficient and larger M means larger amplitude); b length of periodicity T and c initial phase t0