About the Authors

Lingzhi Kong

Roles Writing – original draft

Affiliation School of Computer Science and Technology, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

Jinyong Cheng

Roles Supervision

cjy@qlu.edu.cn

Affiliation School of Computer Science and Technology, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

Competing Interests

The authors have declared that no competing interests exist.