1. Mathematics Teaching and Research Office of Basic Department, Chongqing Creation Vocational College, Yongchuan, Chongqing, China
2. Chongqing City Vocational College, Yongchuan, Chongqing, China
3. Centre for Infrastructure Engineering, Western Sydney University, Penrith, NSW, Australia
4. Industrial Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia