1. University of Lorraine, Campus Sciences BP,CRAN UMR 7039 CNRS,Nancy,France,70239 54506
2. University of Lorraine,Lorraine Research Laboratory in Computer Science and Its Applications, CNRS,Nancy,France,F-54000
3. TECNM/Cenidet, Interior Internado Palmira S/N, Palmira,Electronic Engineering Department,Cuernavaca,Morelos,Mexico,62490