1. School of Computer Science and TechnologyWuhan University of Technology122 Luoshi RoadWuhanHubeiPeople's Republic of China
2. Fujian Provincial Key Laboratory of Information Processing and Intelligent Control Minjiang UniversityFuzhouPeople's Republic of China
3. Department of Computer ScienceUniversity of SurreyGuildford GU2 7XHUK
4. Department of Electronic EngineeringCity University of Hong KongKowloonHong Kong