1. 1 Doctoral School of Applied Informatics and Applied Mathematics , University Research, Innovation and Service Center, Óbuda University , Budapest , Hungary
2. 2 University Research, Innovation and Service Center, Óbuda University , Budapest , Hungary
3. 3 Computational Intelligence Research Group , Sapientia Hungarian University of Transylvania , Târgu Mureş , Romania , University Research, Innovation and Service Center, Óbuda University , Budapest , Hungary , Department of Mechanical Engineering , University of Canterbury , Christchurch , New Zealand