1. School of Mechanical, Materials, Mechatronic and Biomedical, University of Wollongong, Wollongong, NSW, Australia
2. Institute of Machinery Manufacturing Technology, China Academy of Engineering Physics, Mianyang, People's Republic of China
3. School of Civil and Transportation Engineering, Qinghai Nationalities University, Xining, People's Republic of China
4. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, People's Republic of China