The Scientific Bulletin of Electrical Engineering Faculty

Honorary Editor-In-Chief
Horia Leonard ANDREI, University Valahia of Targoviste, Romania

Co-Editors-in-Chief
Emil DIACONU, University Valahia of Targoviste, Romania
Gabriel PREDUSCA, University Valahia of Targoviste, Romania

Managing Editor
Andrei-Cosmin GHEORGHE, University Valahia of Targoviste, Romania

Editorial Advisory Board
Paul Cristian ANDREI, University Politehnica Buchrest, Romania
Adriana ALEXANDRU, ICI Bucharest, Romania
Petru ARMEAN, University of Medicine and Pharmacy "Carol Davila" Bucharest, Romania
Rachid EL BACHTIRI, Université Sidi Mohammed Ben Abdellah Fes Maroc, Marocoo
Valeriu BEIU, University of Ulster, United Kingdom
Nicu BIZON, University of Pitesti, Romania
Ian BRIDGWOOD, Copenhagen University College of Engineering, Denmark
Vlad BUDU, University of Medicine and Pharmacy "Carol Davila" Bucharest, Romania
Mihai BURLIBASA, University of Medicine and Pharmacy "Carol Davila" Bucharest, Romania
Emil CAZACU, University Politehnica of Bucharest, Romania
Costin CEPISCA, University Politehnica of Bucharest, Romania
César R. CHAMORRO, Universidad de Valladolid, Span
Jocelyn CHANUSSOT, Grenoble Institute of Technology, France
Gianfranco CHICCO, Politecnico di Torino, Italy
Henri-George COANDĂ, University Valahia of Targoviste, Romania
Daniela COLTUC, University Politehnica of Bucharest, Romania
Dinu COLTUC, University Valahia of Targoviste, Romania
Vlad CONSTANTIN, University of Medicine and Pharmacy "Carol Davila" Bucharest, Romania
Florin CONSTANTINESCU, University Politehnica of Bucharest, Romania
Bogdan CRÂNGARU-CREŢU, ABB Schweiz AG, Geneva, Switzerland
Lucien DASCALESCU, University of Poitiers, France
Radu DOBRESCU, University Politehnica of Bucharest, Romania
Oana DROSU, University Politehnica of Bucharest, Romania
Florin FILIP, Member of Romanian Academy, Romania
Marian GAICEANU, University “Dunarea de Jos” Galati, Romania
Jean Paul GAUBERT, University of Poitiers, France
Madalina GEORGESCU, University of Medicine and Pharmacy "Carol Davila" Bucharest, Romania
Gabriel GORGHIU, University Valahia of Targoviste, Romania
Gheorghe GRIGORAS, Technical University "Gh. Asachi", Iasi, Romania
Sorin Dan GRIGORESCU, University Politehnica of Bucharest, Romania
Gelu GURGUIATU, University “Dunarea de Jos” Galati, Romania
Jorgen HANSEN, Copenhagen University College of Engineering, Denmark
Ioannis HATZILYGEROUDIS, University of Patras, Greece
Ioan Florea HANTILA, University Politehnica of Bucharest
Costin IFRIM, ECOAIR Corporation, USA
Valentin IONITA, University Politehnica of Bucharest, Romania
Mihai IORDACHE, University Politehnica of Bucharest, Romania
Gabriel JIGA, University Politehnica of Bucharest, Romania
Ersan KABALCI, Nevsehir Haci Bektas University, Turkey
Maria KORDAKI, Patras University, Greece
Teodor LEUCA, University of Oradea, Romania
Eila LINDFORS, University of Tampere, Finland
George LOJEWSKI, University Politehnica of Bucharest, Romania
Ion LUNGU, CEZ Trade, Romania
Mihai MARICARU, University Politehnica of Bucharest, Romania
Jerome MARS, Grenoble Institute of Technology, France
Ernest MATAGNE, University of Louvain, Belgium
Driss MEHDI, University of Poitiers, France
Nedra MELLOULI-NAUWYNCK, Univ. Paris 8, IUT de Montreuil, France
Dan D. MICU, Technical University of Cluj, Romania
Andreia MURGU, University of Medicine and Pharmacy "Carol Davila" Bucharest, Romania
Guillermo Palacios NAVARRO, University of Zaragoza, Spain
Iosif NEMOIANU, University Politehnica of Bucharest, Romania
Adrian NICOLESCU, University Politehnica of Bucharest, Romania
Puica NITU, WES Canadian Institute, Toronto, Canada
Gheorghe PALTANEA, University Politehnica Bucharest, Romania
Veronica PALTANEA, niversity Politehnica Bucharest, Romania
George PAPANICOLAU, Patras University, Greece
Paul PENCIOIU, ICPE Bucharest, Romania
Radu PENTIUC, University ,,Stefan cel Mare" of Suceava, Romania
Marian PIERZCHALA, University of Wroclaw, Polland
Cezar POPA, University "Stefan cel Mare" of Suceava, Romania
Mihai Octavian POPESCU, University Politehnica of Bucharest, Romania
Dorina POPOVICI, University Politehnica of Bucharest, Romania
Remus PUSCA, University D’Artois, France
Ben RODANSKI, Technical University, Sidney, Australia
Angela RUSSO, Politecnico di Torino, Italia
Roberto SALGADO, Universidade Federal de Santa Catarina, Florianopolis, Brasil
Helga SILAGHI, University of Oradea, Romania
Marius SILAGHI, University of Oradea, Romania
Filippo SPERTINO, Politecnico di Torino, Italy
Mihail-Florin STAN, University Valahia of Targoviste, Romania
Marilena STANCULESCU, University Politehnica of Bucharest, Romania
Wiesław TŁACZAŁA, University of Technology Warsaw, Poland
Slim TNANI, University of Poitiers, France
Nikita TOMIN, Energy System Institute SB RAS, Irkutsk, Russia
Alexandru SALCEANU, Technical University “Gh. Asachi” Iasi, Romania
Horia-Nicolai TEODORESCU, Technical University “Gh. Asachi” Iasi, Romania
Nicolae VASILE, University Valahia of Targoviste, Romania
Ion VONCILA, University “Dunarea de Jos” Galati, Romania

Editors
Nicu BIZON, University of Pitesti, Romania
Vlad BUDU, University of Medicine and Pharmacy "Carol Davila" Bucharest, Romania
Gianfranco CHICCO, Politecnico di Torino, Italy
Dinu COLTUC, University Valahia of Targoviste, Romania
Lucien DASCALESCU, University of Poitiers, France
Marian GAICEANU, University “Dunarea de Jos” Galati, Romania
Mihai MARICARU, University Politehnica Bucharest, Romania
Jean Akilimali SUMAILI, INESC TEC Porto, Portugal

Language Editors
Luminita DUTA, University Valahia of Targoviste, Romania
Diana ENESCU, University Valahia of Targoviste, Romania

Technical Editors
Ion CACIULA, University Valahia of Targoviste, Romania
Andrei Cosmin GHEORGHE, University Valahia of Targoviste, Romania
Dan PUCHIANU, University Valahia of Targoviste, Romania

Contact
emy_diaconu@yahoo.com
buletinfie@valahia.ro
gheorghe_andrei89@yahoo.com
emy_diaconu@yahoo.com

Publisher
De Gruyter Poland
Bogumiła Zuga 32A Str.
01-811 Warsaw, Poland
T: +48 22 701 50 15