Railway Safety Risk Assessment and Control Optimization Method Based on FTA-FPN: A Case Study of Chinese High-Speed Railway Station

Table 2

Numeric characteristics of cloud models.

Assessment classifications	Cloud model	Expectation	Entropy	Hyper entropy
C		1.000	0.103	0.013
JC		0.691	0.064	0.008
Z		0.500	0.039	0.005
JH		0.309	0.064	0.008
H		0	0.103	0.013