1. Non Destructif Testing Laboratory (NDT Lab), Automatic Department, Sciences and Technology Faculty, Mohammed Seddik Ben Yahia University of Jijel, Jijel, Algeria;
2. Science and Technology Department, Science and Technology Institute, University Center of Mila, Mila, Algeria;
3. IEMN DOAE Le Mont Houy, University of Valenciennes, Valenciennes, France;
4. Department of Computer Science and Engineering, Blekinge Institute of Technology, Karlskrona, Sweden