1. Professor, College of Management Science, Chengdu Univ. of Technology, Chengdu 610059, PR China. ORCID: .
2. College of Earth Sciences, Chengdu Univ. of Technology, Chengdu 610059, PR China (corresponding author).
3. College of Earth Sciences, Chengdu Univ. of Technology, Chengdu 610059, PR China.