Research Article

A Novel Method for Remaining Useful Life Prediction of Roller Bearings Involving the Discrepancy and Similarity of Degradation Trajectories

Figure 16

The curves of depth characteristics over operation time of bearing 2–1: (a) No. 57, (b) No. 94, (c) No. 168, and (d) No. 205.
(a)
(b)
(c)
(d)