1. Doctoral School of Mechanical Engineering, Szent István University, Gödöllő 2100, Hungary
2. Department of Mathematics, Statistics & Computer Science, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar 263145, U.K., India
3. Department of Energy Systems Engineering, Koforidua Technical University, Koforidua KF-981, Ghana
4. Department of Computer Science and Engineering, DIT University, Dehradun 248009, U.K., India