1. School of Highway, Chang’an University, Middle Section, South Erhuan Rd., Xi’an City, Shaanxi Province 710064, China
2. School of Highway, Chang’an University, Middle Section, South Erhuan Rd., Xi’an City, Shaanxi Province 710064, China (Corresponding author), e-mail: wanghn@chd.edu.cn, https://orcid.org/0000-0001-9268-8073