1. School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
2. Department of Mechanical Engineering, Rwanda Polytechnic/Integrated Polytechnic and Regional College-Ngoma (RP/IPRC-Ngoma), Kibungo P.O. Box 35, Rwanda
3. Department of Business Information Technology, University of Rwanda, Kigali P.O. Box 4285, Rwanda