1. Department of Computer Engineering, Ahar Branch; Islamic Azad University; Ahar Iran
2. CNIT (Center of National Consortium Inter-Universities in Telecommunication), Department of Electronic Engineering; University Tor Vergata of Rome; Rome Italy
3. Department of Information Engineering Electronics and Telecommunications (DIET); University Sapienza of Rome; Rome Italy
4. Department for Management of Science and Technology Development; Ton Duc Thang University; Ho Chi Minh City Vietnam
5. Faculty of Information Technology; Ton Duc Thang University; Ho Chi Minh City Vietnam
6. Department of Mathematics; University of Padua; Padua Italy