Research on Multilevel Classification of High-Speed Railway Signal Equipment Fault Based on Text Mining

Table 3

Weight calculation results of the signal fault category of the first-level classification.

Category	Classified network	Number of classification errors/total number of categories		Category weight
Switch machine	BiGRU	5/28	0.1786	1.5259
	BiLSTM	8/28	0.2857	0.9164
External locking and installation device	BiGRU	7/13	0.5386	0
	BiLSTM	8/13	0.6154	0
Paste checker	BiGRU	2/3	0.6667	0
	BiLSTM	1/3	0.3333	0.6933
Switch control circuit equipment	BiGRU	23/66	0.3485	0.6256
	BiLSTM	27/66	0.4091	0.3679
Maintenance equipment	BiGRU	24/100	0.2400	1.1527
	BiLSTM	31/100	0.3100	0.8001
Supporting equipment	BiGRU	193/1038	0.1859	1.4769
	BiLSTM	216/1038	0.2081	1.3364
Unknown cause	BiGRU	87/436	0.1995	1.3894
	BiLSTM	93/436	0.2133	1.3051