1. School of Mathematical Science, Anhui University, Hefei 230601, People's Republic of China
2. Institute of Bio-inspired Intelligence and Mining Knowledge, School of Computer Science and Technology, Anhui University, Hefei 230601, China
3. School of Physics and Material Science, Anhui University, Hefei 230601, China
4. Center of Information Support and Assurance Technology, Anhui University, Hefei 230601, China
5. Department of Communication Engineering, North University of China, Taiyuan, Shan'xi 030051, China