1. School of Computer, Electronic and Information, Guangxi University, Nanning, Guangxi, China
2. School of Computer, Electronic and Information and State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
3. Department of Computing Sciences, State University of New York, Brockport, Brockport, NY, USA
4. School of Computer Science and Control Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
5. Department of Computer Science and Information Technology, La Trobe University, Melbourne, Victoria, Australia