1. School of Mechanical and Electrical Engineering, Shandong Jianzhu University, Jinan, China
2. School of Rail Transportation, Soochow University, Suzhou, China
3. School of Information and Electrical Engineering, Shandong Jianzhu University, Jinan, China
4. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan, China