1. Laboratoire de Mécanique des Sols, Structures et Matériaux, Ecole Centrale Paris, CNRS UMR8579, PRES UniverSud, Grande Voie des Vignes, 92295 Châtenay-Malabry Cedex, France
2. Grenoble Electrical Engineering Laboratory (G2ELab), Joseph Fourier University (UJF), CNRS, 25 Rue des Martyrs, 38042 Grenoble Cedex, France
3. Department of Polymer Science & Engineering, University of Science & Technology Beijing, Beijing 100083, P. R. China