1. Institute of Mechanics, Materials and Civil Engineering (iMMC); Université Catholique de Louvain; Bâtiment Euler, Avenue Georges Lemaître 4; 1348; Louvain-la-Neuve; Belgium
2. Department of Electrical Engineering and Computer Science; Université de Liège; Montefiore Institute B28, Grande Traverse 10; 4000; Liège; Belgium