1. Railenium Research and Technology Institute,Valenciennes,France,59540
2. Research center in Computer Science, Signal and Automatic Control of Lille (CRIStAL),Villeneuve d'Ascq,France,59655
3. Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL), Centrale Lille Institut,Lille,France,59000