1. College of Engineering, Huaqiao University, Quanzhou, China
2. Department of Computer and Electronics Systems Engineering, Hankuk University of Foreign Studies Yongin-si, Gyeonggi-do, Korea
3. School of Computer and Software, Nanjing University of Information Science and Technology, Nanjing, China
4. Department of Mathematics and Applications “R. Caccioppoli”, University of Naples Federico II, Italy