1. School of Internet, Anhui University, Hefei, China
2. School of Information Engineering, Henan Institute of Science and Technology, Xinxiang, China
3. Key Laboratory of Knowledge Automation for Industrial Processes, Ministry of Education, School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing, China
4. School of Computer Science and Engineering, Nanyang Technological University, Jurong West, Singapore