1. CONSTRUCT—LESE, Faculty of Engineering, University of Porto, 4099-002 Porto, Portugal
2. Department of Mechanical Engineering, School of Engineering, University of Minho, 4710-057 Guimarães, Portugal
3. CONSTRUCT—LESE, School of Engineering, Polytechnic of Porto, 4249-015 Porto, Portugal
4. Faculty of Engineering, University of Porto, 4099-002 Porto, Portugal
5. Labiomep, INEGI, 4099-002 Porto, Portugal
6. Instituto de Telecomunicações, ISCTE-IUL Lisbon, 1649-026 Lisbon, Portugal