Affiliation:
1. College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, P.R. China
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
China Postdoctoral Science Fundation
Jiangsu Funding Program for Excellent Postdoctoral Talent
Fundamental Research Funds for the Central Universities
the Intelligence Introduction Base of the Ministry of Science and Technology
the author Lianyi Liu would like to acknowledge the scholarship from China Scholarships Council