1. School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
2. Georgia Tech—CNRS, UMI 2958, 57070 Metz, France
3. Université de Lorraine, CentraleSupelec, LMOPS, EA4423, 57070 Metz, France
4. PSA Peugeot Citroën, 75, Avenue de la Grande Armée, Paris 75116, France
5. CNRS, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France