1. Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming, China
2. State Key Laboratory of Mechanical Transmission & School of Automotive Engineering, Chongqing University, Chongqing, China
3. Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, U.K.
4. School of Engineering, University of Manchester, Manchester, U.K.