1. Department of Computer and Information Sciences, Northumbria University, Newcastle upon Tyne, U.K.
2. Department of Computer Science, Royal Holloway, University of London, Surrey, U.K.
3. College of Energy and Electrical Engineering, Hohai University, Nanjing, China
4. Institute for Intelligent Systems Research and Innovation, Deakin University, Waurn Ponds, VIC, Australia
5. College of Tongda, Nanjing University of Posts and Telecommunications, Nanjing, China
6. James Watt School of Engineering, University of Glasgow, Glasgow, U.K.
7. School of Science and Engineering, University of Dundee, Dundee, U.K.
8. School of Computer Science, Hubei University of Technology, Wuhan, China