Research Article

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

Figure 9

The DI curves of testing data sets: (a) bearing 1_3, (b) bearing 1_4, (c) bearing 1_5, (d) bearing 1_6, (e) bearing 1_7, (f) bearing 2_3, (g) bearing 2_4, (h) bearing 2_5, (i) bearing 2_6, (j) bearing 2_7, and (k) bearing 3_3.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
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(k)