1. School of Electronics and Information Engineering, Wuzhou University, Wuzhou, China
2. School of Mechanical Engineering, Dongguan University of Technology, Dongguan, China
3. School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, China
4. Guangxi Ramway Technology Co., Ltd, Wuzhou, China
5. School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, China