1. College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, P. R. China
2. Department of Mathematics, Mohi-ud-Din Islamic University Nerian Sharif AJ&K, Pakistan
3. Department of Mathematics and Statistics, Hazara University, Mansehra 21120, Pakistan
4. Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11451, Saudi Arabia