Fault Detection and Identification for Nonlinear Process Based on Inertia-Based KEPCA and a New Combined Monitoring Index

Table 4

Computation time in minute.

Fault ID	NCI	Unified index	KPCA-KDE
1	9	9	6
2	36	36	33
3	129	129	1725
4	9	9	3
5	3	3	3
6	3	3	3
7	3	3	3
8	45	66	48
9	9	18	1725
10	57	81	180
11	18	21	15
12	9	9	42
13	111	114	105
14	3	3	6
15	1725	1737	1725
16	3	45	81
17	72	75	45
18	45	255	24
19	33	249	36
20	243	249	105
21	855	855	—