1. Department of Electrical EngineeringDamavand BranchIslamic Azad UniversityDamavandIran
2. Department of Electrical EngineeringAmirkabir University of TechnologyTehranIran
3. School of Technology and InnovationsUniversity of Vaasa65200VaasaFinland
4. Faculty of Engineering of the University of Porto and INESC TEC4200–465PortoPortugal