1. Key Laboratory of Electronic Commerce and Logistics of Chongqing, Chongqing University of Posts and Telecommunications, Chongqing, China
2. Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong, SAR
3. School of Information and Communication Technology, Griffith University, Southport, QLD, Australia
4. College of Management and Economics, Tianjin University, Tianjin, China