1. College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, P.R. China;
2. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, P.R. China;
3. School of Economics and Management, Nanjing University of Science and Technology, Nanjing, P.R. China;
4. Department of Industrial Engineering, Pusan National University, Busan, Korea;
5. Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, MI, USA