1. College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao, China
2. College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou, China
3. School of Information Engineering, Zhengzhou University, Zhengzhou, China
4. Fujian Provincial Key Laboratory of Information Processing and Intelligent Control, College of Computer and Control Engineering, Minjiang University, Fuzhou, China