1. School of Software Engineering and International Center for Informatics Research, Beijing Jiaotong University, Beijing, China
2. School of Software Engineering, Beijing Jiaotong University, Beijing, China
3. International Center for Informatics Research, Beijing Jiaotong University, China
4. School of Economics and Management, Beijing Jiaotong University, China
5. Department of Industrial Engineering Turkish Naval Academy, National Defence University, Tuzla, Turkey
6. Department of Operations Research and Statistics, Faculty of Organizational Sciences, University of Belgrade, Belgrade, Serbia