1. Electrical Department, National School of Engineers of Sfax, Soukra Street, Sfax; 3072, Tunisie., ,
2. GEII Department, University of Picardie Jules Verne, 13 François Mitterrand avenue, Cuffies, 02280 France.
3. Electrical Department, University of Batna, Route de Biskra, Batna, 5000, Algeria.