1. Ph.D. Student, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China; Lecturer, School of Water Conservancy and Hydroelectric, Hebei Univ. of Engineering, Handan 056038, China (corresponding author).
2. Professor, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.
3. Senior Engineer, Dept. of Technical Development, Baic Motor Corporation Ltd., 1 Liangli St., Economic Development Zone, Tong Zhou District, Beijing 101300, China.
4. Associate Professor, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.
5. Senior Engineer, Dept. of Vehicle Technology, China North Vehicle Research Institute, Beijing 100072, China.