Table 2.

The specific channels corresponding to the best results obtained by different features and optimizers.

Optimizer	Time-domain feature	FC feature	Wavelet feature
GA	3 5 12 14 19 25 31 32 34 39 41 43 48	2 5 7 8 11 12 13 15 17 18 19 20 22 24 25 27 30 31 36 45 48 50 51 52	1 3 6 7 9 10 13 16 19 29 30 32 34 39 45 48
PSO	3 5 14 19 27 30 31 34 39 40 41 43 44 45 47	2 5 6 7 9 10 12 13 15 17 20 22 25 45 46 47 51	1 2 6 8 9 11 14 16 19 24 29 30 32 34 39 45 48
pGAPSO-I	3 4 19 26 30 39 47 51	2 7 9 13 14 15 16 17 20 25 26 30 36 45 51 52	3 6 7 10 19 34 39 46 48
pGAPSO-II	2 6 16 19 30 37 39 43 44 47 50	2 5 6 8 13 15 17 19 20 30 45	1 3 6 19 27 30 32 35 39 45 48
pGAPSO-III	4 13 14 19 20 31 39 47 48	2 4 7 12 14 15 16 17 25 26 31 45 48 50 51	1 2 6 15 19 30 39 45 47 48
sPSOGA	2 4 6 7 8 10 16 18 19 25 31 34 36 37 39 43 44 47 50	2 7 8 9 11 12 13 15 16 17 18 19 20 25 28 30 45 49 50	1 3 6 9 10 13 19 26 30 32 34 39 40 45 48
sGAPSO	2 5 8 12 16 19 20 24 25 39 43 44 47 48 50	2 5 7 8 9 11 12 13 15 17 18 19 20 25 30 42 45 46 48 50 51	1 3 6 9 12 13 24 29 30 32 39 45 48