1. Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, P.R.China
2. Automotive Tribology Center, Department of Mechanical Engineering, School of Engineering and Computer Science, Oakland University, Rochester, Michigan, USA
3. Department of Mechanical Engineering, College of Modern Science and Technology, China Jiliang University, Hangzhou, Zhejiang, P.R.China