1. School of Information Technology, Jiangxi University of Finance and Economics; Nanchang 330013 China
2. Jiangxi E-commerce High Level Engineering Technology Research Centre; Nanchang 330013 China
3. Griffith School of Engineering, Griffith University, Gold Coast Campus; Queensland 4222 Australia
4. Centre for Intelligent and Networked Systems; Central Queensland University; Rockhampton Queensland 4702 Australia