1. Anhui University,School of Computer Science and Technology,Hefei,China
2. Hefei University of Technology,School of Microelectronics,Hefei,China
3. Kyushu Institute of Technology,Graduate School of Computer Science and Systems Engineering,Fukuoka,Japan
4. University of Montpellier / CNRS,Laboratory of Informatics, Robotics and Microelectronics of Montpellier,Montpellier,France,34095