1. School of Computer Science and Technology, Shandong Technology and Business University, Yantai, P.R. China
2. Department of Mathematics, University of Azad Jammu and Kashmir Muzaffarabad, Pakistan
3. Department of Mechanics and Engineering Science, Peking University, Beijing, P.R. China
4. Department of Mechanical Engineering, Prince Mohammad Bin Fahd University, Al-Khobar, Kingdom of Saudi Arabia
5. Department of Physics, Gulistan State University, Uzbekistan
6. Mathematics Department, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia