1. College of Computer Science and Electronic Engineering, Hunan University, Changsha, People's Republic of China
2. School of Computer Science and Engineering, Hunan University of Science and Technology, Xiangtan, People's Republic of China
3. Hunan Key Laboratory for Service computing and Novel Software Technology, Xiangtan, People's Republic of China
4. the Seventh Research Institute of China Electronics Technology Corporation, Guangzhou, People's Republic of China
5. Institute of Information Technology,Lodz University of Technology, Poland