About the Authors

YunHong Zhang

zyh_qdu@126.com

Affiliations Institute of Complexity Science, Qingdao University, Qingdao, China, College of Computer Science & Technology, Qingdao University, Qingdao, China

QiPeng Liu

Affiliation Institute of Complexity Science, Qingdao University, Qingdao, China

SiYing Zhang

Affiliation Institute of Complexity Science, Qingdao University, Qingdao, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: YZ QL. Formal analysis: YZ QL. Software: YZ. Writing – original draft: YZ QL. Writing – review & editing: YZ QL SZ.