1. College of Information & Communication Engineering, Dalian Minzu University, Dalian, People’s Republic of China
2. School of Mechanical Engineering, Dalian University of Technology, Dalian, People’s Republic of China
3. School of Microelectronics, Dalian University of Technology, Dalian, People’s Republic of China
4. KEDE Numerical Control Co.,Ltd, Dalian, People’s Republic of China