1. School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, China
2. Guangxi Engineering Technology Research Center of Ship Digital Design and Advanced Manufacturing, Beibu Gulf University, Qinzhou, China
3. Intelligentized Robotic Welding Technology Laboratory, Shanghai Jiao Tong University, Shanghai, China
4. Faculty of Education, Saitama University, Saitama, Japan