Intelligent Mechanical Fault Diagnosis Based on Multiwavelet Adaptive Threshold Denoising and MPSO

Figure 4

The denoising results using different wavelet denoising techniques. (a) Multiwavelet adaptive threshold denoising, (b) multiwavelet neighboring coefficient denoising, and (c) db2 wavelet threshold denoising.

(a)

(b)

(c)