1. School of Mechanical Engineering, Taiyuan Univ. of Science and Technology, Taiyuan 030024, Shanxi, China.
2. Professor, School of Mechanical Engineering, Taiyuan Univ. of Science and Technology, Taiyuan 030024, Shanxi, China (corresponding author).
3. Professor, School of Mechanical Engineering, Taiyuan Univ. of Science and Technology, Taiyuan 030024, Shanxi, China.