1. State Key Laboratory of Performance Monitoring, Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang, P. R. China
2. School of Materials Science and Engineering, East China Jiaotong University, Nanchang, P. R. China
3. Department of Aviation Oil and Material, Air Force Logistics College, Xuzhou, P. R. China
4. College of Material and Chemical Engineering, Tongren University, Tongren, P. R. China