About the Authors

Li Yuan

Roles Conceptualization, Funding acquisition, Writing – original draft

yuanli813@126.com

Affiliation Department of Mathematics and Computer Science, Hanjiang Normal University, Shiyan, China

Yang Chen

Roles Data curation, Methodology, Validation

Affiliation Department of Mathematics and Computer Science, Hanjiang Normal University, Shiyan, China

Competing Interests

The authors have declared that no competing interests exist.