1. School of Business, Qingdao University, Qingdao, China
2. School of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou, China
3. College of Information and Control Engineering, Liaoning Petrochemical University, Fushun, China
4. Department of Computer Science and Technology, Shandong University of Science and Technology, Qingdao, China
5. Department of Systems Engineering, Macau University of Science and Technology, Macau, China
6. Department of Computer Science, King Abdulaziz University, Jeddah, Saudi Arabia