1. Sultan Moulay Slimane University,LaSTI, ENSA-Khouribga,Morocco
2. University of Santiago,Electrical Engineering Department,Chile
3. Universidad de Valladolid,Departamento de Ingenieria de Sistemas y Automatica,Valladolid,Spain,47005
4. Sidi Mohamed Ben Abdellah University,Faculty of Sciences-Fez,Morocco