1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, People’s Republic of China
2. Guangzhou Key Laboratory of Nontraditional Machining and Equipment, Guangzhou, People’s Republic of China
3. South China University of Technology, School of Mechanical and Automotive Engineering, Guangzhou, People’s Republic of China
4. Department of Mechanical Engineering, Automotive Tribology Center, Oakland University, Rochester, MI, USA