1. School of Management, Hefei University of Technology, Hefei, People's Republic of China
2. Key Laboratory of Process Optimization and Intelligent Decision-making, Ministry of Education, Hefei, People's Republic of China
3. Department of Mathematics, Brunel University London, Uxbridge, UK
4. School of Computer Science and Technology, Huaibei Normal University, Huaibei, People's Republic of China