Research Article
A Rolling Bearing Fault Diagnosis-Optimized Scale-Space Representation for the Empirical Wavelet Transform
Figure 22
Results obtained by the traditional EWT: (a) SSP (green dashed line: the detected threshold by k-means clustering); (b, c) sub-band signals; (d) detected boundaries (green dash-dotted lines), (e, f) squared envelope spectra (red dash-dotted lines: fBSF and its harmonics).
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