1. University of Lille, CNRS, UMR 9221 - LEM - Lille Economie Management,IESEG School of Management,Lille,France,F-59000
2. University of Science and Technology Beijing,School of Economics and Management,Beijing,China,100083
3. Technical University of Denmark, 2800 Kgs,Department of Mechanical Engineering,Lyngby,Denmark
4. Chinese Academy of Science and Technology for Development,Beijing,China,100083