Affiliation: | 1. Laboratory of Computer Research,Department of Computer Sciences,University of Badji Mokhtar,B.P. 12 Sidi Amar 23000,Annaba,Algéria 2. Laboratory of Inveres Problems,Modeling,Information and Systems,Department of Electronic and Telecommunication,University of 08 Mai 1945,P.O. box 401 Guelma 24000,Algéria |