1. School of Automation, Beijing Institute of Technology, Beijing, China
2. Zhongyuan University of Technology, Zhengzhou, Henan, China
3. Department of Computer Science, Faculty of Physics, Engineering, and Computer Science, University of Hertfordshire, Hatfield, United Kingdom
4. Department of Computer Sciences, College of Computer and Information Sciences, Princess Nourah bint Abdulrahman University, Riyadh, Riyadh, Saudi Arabia