1. School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China
2. China National Petroleum Corporation, Daqing Welding Technology Training Center, Daqing 163712, China
3. Overall R&D Department, CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130062, China
4. Welter Tunnel Equipment Co., Ltd., Jilin 132000, China