State Diagnosis of Elevator Control Transformer over Vibration Signal Based on MEA-BP Neural Network

Table 2

Influence of the number of individuals in a subgroup on system performance.

Number of m	Minimum evolution times	Maximum evolution times	Average evolution times	Correct convergence rate (%)
3	23	49	40	22.48
4	22	45	39	61.91
5	21	40	34	79.18
6	20	38	32	81.67
7	18	36	32	82.46
8	19	33	30	68.73