Table 2 The quasi-optimal solutions under different confidence levels

0.8

1,4,2,3,6,8,19,5,11,7,22,9,13,23,14,12,20,17,

48

26,24,16,10,21,27,25,18,15,28,30,31,29,32

0.85

1,3,4,2,6,8,16,19,5,12,11,13,7,9,14,23,17,20,

49.3

15,24,22,18,10,26,25,21,27,28,29,30,31,32

0.9

1,2,3,4,6,8,19,5,13,7,9,23,22,14,27,12,16,11,

50.2

17,20,24,26,10,21,25,15,18,28,30,31,29,32

0.95

1,4,2,3,6,8,5,19,11,13,12,9,23,7,14,17,18,20,

50.9

15,22,24,10,16,26,21,25,28,27,29,30,31,32

1

1,2,4,3,6,16,8,19,5,12,11,13,9,7,14,23,18,20,

52

15,22,17,24,10,25,26,21,27,28,29,30,31,32