Affiliation: | 1. Research Unit EACPI , University Cadi Ayyad, Department of Physics, Faculty of Science Semlalia , P.B. 2390, Marrakech, Morocco;2. Center of Excellence DEWS , Dept. Electrical?&3. Information Engineering, University of L'Aquila , Poggio di Roio, 67040 L'Aquila, Italy |