Bilel Hamdi, National Engineering School of Tunis (ENIT)/ University of Tunis El Manar, Tunisia; Taoufik Aguili, National Engineering School of Tunis (ENIT)/University of Tunis El Manar, Tunisia
Siwar Louati, university of québec outaouais, Canada; Fethi Mejri, National Engineering School of Tunis (ENIT), Tunisia; Larbi Talbi, university of québec outaouais, Canada