1. Changsha Normal, University, China
2. Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong and Department of Information science and Technology, Yanshan University, China
3. Shantou University Medical College, Shantou, Guangdong, China and Department of Information science and Technology, Yanshan University, China
4. Airforce Engineering University, China
5. Department of Information and Communication Engineering, Beijing Institute of Graphic Communication, Beijing, China
6. Department of Information science and Technology, Yanshan University, China