About the Authors

Zhixiu Du

Roles Data curation, Funding acquisition, Methodology, Project administration, Resources, Software, Supervision, Writing – original draft, Writing – review & editing

duzhixiu-2008@163.com

Affiliation School of Statistics and Mathematics, Inner Mongolia University of Finance and Economics, Inner Mongolia, China

Jinzhu Du

Roles Funding acquisition

Affiliation Inner Mongolia University of Finance and Economics, Inner Mongolia, China

Competing Interests

The authors have declared that no competing interests exist.