1. College of Electrical Engineering, Anhui Polytechnic University, Wuhu, China
2. School of Microelectronics, Hefei University of Technology, Hefei, China
3. School of Computer Science and Technology, Anhui University, Hefei, China
4. Department of Creative Informatics, Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, Japan