1. College of Information System and Management, National University of Defense Technology, Street Yanzheng, Hunan, Changsha, China
2. Energy Department, Politecnico di Milano, Via Ponzio, Milano, MI, Italy
3. Chair on Systems Science and the Energetic challenge, European Foundation for New Energy-EDF, Ecole Centrale Paris LGI-Supelec, Grande Voie des Vignes, Chatenay-Malabry Cedex, Paris, France