1. Department of Railway Power, Shaanxi Railway Institute, Wei Nan, China
2. School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an, China
3. Department of Railway Equipment Manufacturing, Shaanxi Railway Institute, Wei Nan, China
4. Science Research Institute, Weichai Power Co., Ltd., Weifang, China
5. School of Printing and Packaging Engineering, Xi’an University of Technology, Xi’an, China