1. School of Mechanical and Electrical Engineering, Kunming University, China and
Department of Electrical and Electronic Engineering Science, University of Johannesburg, South Africa
2. Department of Electrical and Electronic Engineering Science, University of Johannesburg, South Africa
3. School of Fine Art and Design, Kunming University, China
4. School of Mechanical and Electrical Engineering, Kunming University, China
5. School of Information Science and Technology, Qingdao University of Science and Technology, China