1. School of Information Engineering, Xi’an Eurasia University, Xi’an, Shaanxi, China
2. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
3. Raptor Interactive (Pty) Ltd., Centurion, South Africa
4. Department of Computer Science, Southeast Missouri State University, Cape Girardeau, MO, USA
5. Department of AI Software, Kangwon National University, Samcheok-si, South Korea