1. State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang, China
2. School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang, China
3. Key Laboratory of Nondestructive Testing, Fujian Polytechnic Normal University, Fuzhou, Fujian, China
4. School of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China