1. Ph.D. Student, College of Mechanical and Transportation Engineering, China Univ. of Petroleum, Beijing 102249, China.
2. Professor, College of Mechanical and Transportation Engineering, China Univ. of Petroleum, Beijing 102249, China (corresponding author).
3. Lecturer, Dept. of Mechanical Engineering, North China Univ. of Water Resources and Electric Power, Zhengzhou 450045, China.