Machine Fault Classification Based on Local Discriminant Bases and Locality Preserving Projections

Figure 5

Representation of training samples of bearing dataset A: (a) PCA of WPT feature values, (b) PCA of LDB feature values, (c) LPP of WPT feature values, and (d) LPP of LDB feature values.

(a)

(b)

(c)

(d)