1. Laboratoire Signaux Systémes et Informatique, Department of Physics, Faculty of Sciences Dhar El Mahraz; Universite Sidi Mohamed Ben Abdellah; BP 1796 Atlas 30000 Fes Morocco
2. Modeling Information System Laboratory, UFR of Sciences; University of Picardie Jules Verne; 33 Rue St Leu 80000 Amiens France