1. Department of Mathematics, NBKR Institute of Science and Technology (Autonomous) , Vidyanagar, Tirupati (Dt) , Andhra Pradesh , India
2. Department of Mechanics and Engineering Science, Peking University , Beijing 100871 , China
3. Department of Computer Engineering, College of Computer and Information Sciences, King Saud University , P.O. Box 51178 , Riyadh 11543 , Kingdom of Saudi Arabia,
4. Center of Research, Faculty of Engineering, Future University in Egypt , New Cairo 11835 , Egypt