About the Authors

Fuji Ren

Contributed equally to this work with: Fuji Ren, Ning Liu

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Supervision

ren@is.tokushima-u.ac.jp

Affiliation Faculty of Engineering, Tokushima University, Tokushima, Japan

Ning Liu

Contributed equally to this work with: Fuji Ren, Ning Liu

Roles Formal analysis, Investigation, Resources, Software, Writing – original draft

Affiliation Faculty of Engineering, Tokushima University, Tokushima, Japan

Competing Interests

The authors have declared that no competing interests exist.