1. College of Economics and Management, Northeast Forestry University, Harbin 150040, China
2. EMC3 Research Group, Science and Math Education Department, Universidad de Salamanca, 37008 Salamanca, Spain
3. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
4. School of Economics and Management, Harbin University of Science and Technology, Harbin 150006, China