About the Authors

Yan Liu

Roles Data curation, Funding acquisition, Methodology

skyytliuliu@126.com

Affiliation Library, Yantai Vocational College, Yantai, China

Yan Qu

Roles Methodology, Software, Writing – original draft

Affiliation Library, Yantai Vocational College, Yantai, China

Competing Interests

The authors have declared that no competing interests exist.