About the Authors

Hao Peng

Affiliation Department of Computer Science and Engineering, Zhejiang Normal University, Jinhua 321004, Zhejiang, P. R. China

Dandan Zhao

Affiliation Department of Computer Science and Engineering, Zhejiang Normal University, Jinhua 321004, Zhejiang, P. R. China

Xueming Liu

Affiliations Key Laboratory of Image Information Processing and Intelligent Control, School of Automation, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China, Center for Polymer Studies and Department of Physics, Boston University, Boston, Massachusetts 02215, United States of America

Jianxi Gao

jianxi.gao@gmail.com

Affiliation Center for Complex Network Research and Department of Physics, Northeastern University, Boston, Massachusetts 02115, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HP JXG. Performed the experiments: HP. Analyzed the data: DDZ. Contributed reagents/materials/analysis tools: XML. Wrote the paper: HP DDZ XML JXG. Involved in the discussion and revision work of revised manuscript: HP DDZ XML JXG.