1. Department of Mechanical Engineering, College of Engineering, Sanandaj Branch, Islamic Azad University Sanandaj, Iran
2. WMG, University of Warwick, Coventry, CV4 7AL, UK
3. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
4. School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran