About the Authors

Qing Dai

Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Resources, Writing – original draft

Affiliation School of Information Engineering, Dalian Ocean University, Dalian, China

Jiajia Zhang

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Supervision, Writing – review & editing

zjj892177892@163.com

Affiliation School of Maritime Economics and Management, Dalian Maritime University, Dalian, China

Competing Interests

The authors have declared that no competing interests exist.