1. Department of Automation and Applied Informatics, Politehnica University of Timisoara, Timisoara, Romania
2. Center for Fundamental and Advanced Technical Research, Romanian Academy – Timisoara Branch, Timisoara, Romania
3. Laboratory LAMIH UMR CNRS 8201, Université Polytechnique Hauts-de-France, Valenciennes, France
4. INSA Hauts-de-France, Valenciennes, France
5. Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia