1. Electrical Department, National School of Engineers of Sfax, Soukra Rd. Km 3.5, Sfax B.P.W. 3038, Tunisia (Corresponding author), e-mail: naziha.khlif@gmail.com, https://orcid.org/0000-0001-8291-9077
2. Electrical Department, National School of Engineers of Sfax, Soukra Rd. Km 3.5, Sfax B.P.W. 3038, Tunisia
3. Departemente de Physique, Faculté des Sciences des Sfax, University of Sfax, B.P. 1171, Sfax 3000, Tunisia