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

Table 4

The DTW distances between and .

Training bearings	Testing bearings
	B 1_3	B 1_4	B 1_5	B 1_6	B 1_7	B 2_3	B 2_4	B 2_5	B 2_6	B 2_7	B 3_3
B 1_1	0.5591	0.9381	38.5134	18.2890	0.2406	37.5987	0.9118	24.8003	17.2799	1.0701	47.5313
B 1_2	0.9315	0.2254	1.4864	2.7099	1.8439	1.2902	0.4565	4.8017	1.0021	0.6241	0.9382
B 2_1	2.1973	0.9867	0.5670	1.3385	0.2982	0.3149	0.3211	0.3491	0.3925	0.1425	0.1638
B 2_2	0.7220	0.1774	1.8887	2.9778	1.3142	1.3712	0.8598	1.1538	1.2428	0.7570	1.4594
B 3_1	1.8556	1.6527	0.6120	0.7400	0.3929	0.3620	0.5413	0.5899	0.4178	0.2314	0.2649
B 3_2	0.8017	0.5397	1.5497	1.6687	1.1098	1.194	1.0822	1.1779	1.0373	0.6441	1.3180