About the Authors

Yu Zhao

Roles Data curation, Methodology, Writing – original draft

Affiliation School of Emergency Management, Chongqing Vocational Institute of Safety Technology, Wanzhou, China

Chao Tang

Roles Methodology, Visualization, Writing – review & editing

KISSrain0506@163.com

Affiliation School of Emergency Management, Chongqing Vocational Institute of Safety Technology, Wanzhou, China

Competing Interests

The authors have declared that no competing interests exist.