About the Authors

Yang Wang

Affiliation Department of Systems Science, School of Management and Center for Complexity Research, Beijing Normal University, Beijing, People's Republic of China

Zengru Di

Affiliation Department of Systems Science, School of Management and Center for Complexity Research, Beijing Normal University, Beijing, People's Republic of China

Ying Fan

yfan@bnu.edu.cn

Affiliation Department of Systems Science, School of Management and Center for Complexity Research, Beijing Normal University, Beijing, People's Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YF ZD. Performed the experiments: YW. Analyzed the data: YW. Wrote the paper: YW ZD.