SCIENTIFIC BULLETIN of The POLITEHNICA University of Timisoara, ROMANIA - Transactions on AUTOMATIC CONTROL and COMPUTER SCIENCE

Associate Editor-in-Chief
Prof.dr.ing. *Stefan Preitl*	Prof.dr.ing. *Radu-Emil Precup*	Prof.dr.ing. Marius Crisan
POLITEHNICA University of Timisoara, Romania

Editorial Board

Prof.dr. Dragan Antic, University of Nis, Republic of Serbia		Dr. *Gabriel-Miro Muntean* Dublin City University, Ireland
Prof.dr. *Sašo Blažic* University of Ljubljana, Slovenia		Prof.dr.ing. *Sergiu Nedevschi* Technical University of Cluj-Napoca, Romania
Prof.dr.ing.DHC József Bokor Hungarian Academy of Sciences, Hungary		Prof.dr. Emil Petriu, University of Ottawa, Canada
Prof.dr. *Keith J. Burnham* Coventry University, UK		Prof.dr. *Dorina Petriu* Carleton University, Canada
Prof.dr.ing. Vladimir Cretu, POLITEHNICAUniversity of Timisoara, Romania		Prof.dr.ing. Mircea Popa, POLITEHNICAUniversity of Timisoara, Romania
Prof.dr.ing. Toma-Leonida Dragomir POLITEHNICAUniversity of Timisoara, Romania		Prof.dr.ing. Nicolae Robu, POLITEHNICAUniversity of Timisoara, Romania
Prof.dr.ing.DHC Ioan Dumitrache Corresponding member of the Romanian Academy POLITEHNICA University of Bucharest, Romania		Prof.dr.ing. Hubert Roth, University of Siegen, Germany
Prof.dr.ing. *Petru Eles* Linköping University, Sweden		Prof.dr.DHC Imre J. Rudas, Obuda University, Budapest, Hungary
Acad. *Florin Gheorghe Filip* Romanian Academy, Bucharest, Romania		Prof.dr.ing. Ioan Silea, POLITEHNICAUniversity of Timisoara, Romania
Prof.dr. DHC János Fodor Obuda University, Budapest, Hungary		Prof.dr.ing. Mircea Stratulat, POLITEHNICAUniversity of Timisoara, Romania
Prof.dr. *Voicu Groza* University of Ottawa, Canada		Prof.dr. *Igor Škrjanc* University of Ljubljana, Slovenia
Prof.dr. *Dan Ionescu* University of Ottawa, Canada		Prof.dr.ing. Nicolae Tapus, POLITEHNICA University of Bucharest, Romania
Prof.dr. Philippe Lahire, University of Nice Sophia-Antipolis, France		Prof.dr.ing. Mircea Vladutiu, POLITEHNICAUniversity of Timisoara, Romania
		Prof.dr.ing. Mihail Voicu, Corresponding member of the Romanian Academy "Gh. Asachi" Technical University of Iasi, Romania

Editorial Secretary
Prof.dr.ing. Gheorghe-Daniel Andreescu, POLITEHNICA University of Timisoara, Romania
Associate Editorial Secretary
Assoc.Prof.dr.ing. Dan Pescaru, POLITEHNICA University of Timisoara, Romania

Address for correspondence
Prof.dr.ing. Stefan Preitl
POLITEHNICA University of Timisoara, Faculty of Automation and Computers
Bd. V. Parvan 2, RO-300223 Timisoara, Romania
Phone: +40-2564032-24, -29, Fax: +40-256403214
E-mail: stefan.preitl@aut.upt.ro

Designed and maintained by Dan Pescaru, POLITEHNICA University of Timisoara,
©'2007-2013 Faculty of Automation and Computers

Editor-in-Chief Prof.dr.ing. Octavian Prostean, POLITEHNICA University of Timisoara, Romania

Editor-in-Chief
Prof.dr.ing. Octavian Prostean,
POLITEHNICA University of Timisoara, Romania