Affiliation: | 1. Polytechnic Institute, Stanislaw Staszic University of Applied Sciences in Pila, Podchorążych 10, 64-920 Piła, Poland;2. Institute of Applied Mechanics, Faculty of Mechanical Engineering and Management, Poznan University of Technology, Jana Pawła II 24, 60-965 Poznań, Poland;1. Department of Mechanical Engineering, Shiraz University, Shiraz 71936, Iran;2. Department of Mathematics, University of La Verne, La Verne, CA 91750 U.S.A |