1. School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou, Jiangsu, China
2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, Heilongjiang, China
3. Shanghai Institute of Radio Equipment, Shanghai Institute, Shanghai, China
4. State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou, China