Research Center in Industrial Technologies(CRTI),P.O.Box 64,16014 Cheraga,Algeria;
Laboratoire des Aeronefs,Universite de Blidal,09000 Blida,Algeria;
LGSDS,Ecole Nationale Polytechnique,El Harrach,16200Algiers,Algeria;
LTSM,Universite de Blidal,09000 Blida,Algeria;
ICMMO/SP2M,Bat 410,Universite Paris-Sud 11,91405Orsay Cedex,France;