1. School of Automation Engineering
2. University of Electronic Science and Technology of China
3. Chengdu 611731
4. P. R. China
5. State Key Lab of Advanced Welding and Joining
6. Harbin Institute of Technology (Shenzhen)
7. Shenzhen 518055
8. China
9. Ministry of Education Key Lab of Micro-systems and Micro-structures Manufacturing
10. School of Communication and Information Engineering