1. Department of Applied Mathematics, Dalian University of Technology, Center of Innovative Education and Practice of Dalian University of Technology, Dalian 116024, China
2. Department of Civil Engineering, Dalian University of Technology, Center of Innovative Education and Practice of Dalian University of Technology, Dalian 116024, China
3. Department of Automation, Dalian University of Technology, Center of Innovative Education and Practice of Dalian University of Technology, Dalian 116024, China