About the Authors

Dekun Dong

Roles Conceptualization, Writing – review & editing

Affiliation Qingdao University of Technology, Qingdao City, Shandong Province, China

Shuang Li

Roles Writing – original draft

xiaoge2143@163.com

Affiliation Qingdao University of Technology, Qingdao City, Shandong Province, China

Competing Interests

The authors have declared that no competing interests exist.