Taiyuan University of Technology, Taiyuan University of Technology, Taiyuan University of Technology - State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan University of Technology, Taiyuan University of Technology, Taiyuan University of Technology, Taiyuan University of Technology, Taiyuan University of Technology, Taiyuan University of Technology, Taiyuan University of Technology, affiliation not provided to SSRN and University of Electronic Science and Technology of China