[1] Beijing Jiaotong University, National Research Center of Railway Safety Assessment, Beijing,100044, China
[2] Beijing Jiaotong University, Natl. Res. Ctr. of Rlwy. Safety Assess. and the Beijing Key Lab. of Intelligent Traffic Data Secty. and Privacy Protect. Technol., Beijing,100044, China
[3] Railway Safety Research Center of China State Railway Group Co. Ltd, Beijing,100044, China