1. Associated Laboratory for Energy, Transports and Aeronautics (LAETA/PROA), Faculty of Engineering of University of Porto—FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
2. Centro de Recursos Naturais e Ambiente (CERENA-Porto), School of Engineering, Polytechnic of Porto—ISEP, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal