Figure 7
From: Robust post-processing time frequency technology and its application to mechanical fault diagnosis

Renyi entropy and mixed \(MSE{\text{s}}\) of IF comparisons of the STFT, SST, SET, SSET, FSTFT, FSST, FSET and FSSET methods in different \(\alpha\)(\(MSNR = 16\;{\text{dB}}\)). (a) Renyi Entropy; (b) mixed \(MSE{\text{s}}\) of IF.