The Annals of the "Stefan cel Mare" University Electrical Section ISSN 1222-4316  -  No. 13 / 2000

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Journal of the Faculty of Electrical  Engineering
Topics: computers science, control systems, electronics, electrotechnics, drive systems

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Copyright © 2000 Faculty of Electrical Engineering "Stefan cel Mare" University of Suceava, Romania All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, photocopied, recorded or other wise, without written permission from the editor. When authors submit their papers for publication, they agree that the copyright for their article be transferred to the Faculty of Electrical Engineering, the "Stefan cel Mare" University of Suceava, Romania, if and only if the articles are accepted for publication. The copyright covers the exclusive rights to reproduce and distribute the article, including reprints and translations permission for other use. The copyright owner’s consent does not extend to copying for general distribution, for promotion, for creating new works, or for resale. Specific written permission must be obtained from the Editor for such copying. Disclaimer. Whilst every effort is made by the publishers and editorial board to see that no inaccurate or misleading data, opinion or statement appear in this journal, they wish to make it clear that the data and opinions appearing in the articles, as well as linguistic accuracy, are the sole responsibility of the author.

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The papers may be requested by e-mail directly to their authors with respect of the above copyright conditions !

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[TABLE OF CONTENTS]   [Issues on Internet]  [DISTRIBUTION NETWORK][EDITORIAL BOARD]   [(e)MAIL]

  Adrian GRAUR  - Dean of the Faculty of Electrical Engineering
 

ASSOCIATE  EDITORS

 Stefan Gh. PENTIUC  - Research Officer of the Faculty of Electrical Engineering
 Leon MANDICI  - Vice-dean of the Faculty of Electrical Engineering
 Dorel CERNOMAZU  - Professor of the Faculty of Electrical Engineering
 

EDITORIAL  BOARD

International
 Tudor AMBROS  - Technical University of Chisinau - MOLDAVIA
Jao Paulo BAPTISTA  - Instituto Politecnico do Porto - PORTUGAL
Oleg BREKHOV  - Moscow Aviation Institute - RUSSIA
Christophe CHAILLOU  - Université des Sciences et Technologies de Lille - FRANCE
Luc DE BACKER  - Katholieke Hogeschool Sint-Lieven Gent - BELGIUM
Timoty HALL  - University of Limerick - IRELAND
Ileana HAMBURG  - Institute for Technology Gelsenkirchen - GERMANY
Maria G. IOANNIDES  - National Technical University of Athens - GREECE
Eleftherios A. KAYAFAS - National Technical University of Athens - GREECE
Mykola KIRICHENKO  - Institute of Cybernetics Kiev - UKRAINE
Valeriu KRAPIVIN  - Moscow Institute of Radioengineering and Electronics - RUSSIA
Vladimir MESYURA  - State Technical University of Vinnitsa - UKRAINE
John MILNER  - City University London - GREAT BRITAIN
Jose OLIVEIRA e SA  - Instituto Politecnico do Porto - PORTUGAL
Carine NAESSENS  - Katholieke Hogeschool Sint-Lieven Gent - BELGIUM
Nicola PITRONE  - Universita degli Studi di Catania - ITALIA
Jean Paul SIX  - Université des Sciences et Technologies de Lille - FRANCE
Fedir SOPRONIUC  - University of Cernauti - UKRAINE
Petru TODOS  - Technical University of Chisinau - MOLDAVIA
Bernard TOURSEL  - Université des Sciences et Technologies de Lille – France
 

National
Dumitru N. ALEXANDRU - Technical University Iasi
Lorin CANTEMIR  - Technical University Iasi
Mihai CRETU   - Technical University Iasi
Stefan HOLBAN  - “Politehnica” University Timisoara
Ioan JURCA   - “Politehnica” University Timisoara
Petru LEONTE   - Technical University Iasi
Ioan LETIA   - Technical University Cluj-Napoca
Radu MUNTEANU  - Technical University Cluj-Napoca
Costica NITU  - “Politehnica” University Bucuresti
Adrian PETRESCU  - “Politehnica” University Bucuresti
Mircea PETRESCU  - “Politehnica” University Bucuresti
Alexandru VALACHI  - Technical University Iasi
 
 

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CONFERENCE ON “DEVELOPMENT AND APPLICATION SYSTEMS”  SUCEAVA, 18-20 MAY 2000
 

The Faculty of Electrical Engineering organized the Fifth International Conference on ”Development and Application Systems” attended by scientists from Romania, Moldavia, Germany, Portugal, Greece, Switzerland, Yugoslavia, Ukraine, Russia and Canada. The papers presented covered the following areas:

•  Digital Systems in Process Control                 30 papers
•  Electrical Drives Control                                17 papers
•  Data transmission and Protocols                    12 papers
•  Modeling, Computer Aided Design               19 papers
•  Artificial Intelligence, Pattern Recognition      18 papers

The papers were published in our publication entitled “Development and Application Systems” (ISBN 973-8122-11-2).
 
 

Professor Adrian GRAUR
Dean of the Faculty of Electrical Engineering
 

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Nicolae Dumitru ALEXANDRU, Vlad CEHAN, Laurenţiu PĂNCESCU
"Gh. Asachi" Technical University Iasi,  Faculty of Electronics and Telecommunications
Bd. Copou No 11, 6600 Iasi, Romania
nalex@etc.tuiasi.ro, Phone: 40 - 32- 213737, Fax: 40-32-217720

Abstract. In this paper we investigate the spectral properties of some minimum-bandwidth line codes such as VBP2, VBP4 and MB34. Their power spectral density was derived as a function of both frequency and probability p of a mark at the input of the coder

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Vladimir KATIĆ and Duąan GRAOVAC
University of Novi Sad, Faculty of Engineering
Fuąkogorska 11, 21000 NOVI SAD, Yugoslavia
katav@uns.ns.ac.yu

Abstract. The distribution network supplying large industrial loads or electric power network inside industrial complex are points where power quality degradation is specialy expressed. The paper gives an short overview of power quality survey studies and projects in the past twenty years. The main attention has been paid to voltage vaweform distortation. Some characteristic results of harmonics and voltage sag survey study conducted in network of Electric Industry of Serbia, are presented. The negative effects are discussed and some corrective measures are proposed. An overall solution – universal power quality conditioning system is brifely described.
dbalan@cs.tuiasi.ro

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Dierk SCHRÖDER
Institute for Electrical Drive Systems, Technical University Munich
Arcisstrasse 21, 80333 Muenchen, Germany, Phone +49-89-289-28358, Fax +49-89-289-28336
e-mail:Dierk.Schroeder@ei.tum.de

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Fedir SOPRONIUK
Yury Fedkovich State University of Chernivtsi
str.Universietskai nr.28, UA-58012 Chernivtsi
fosopr@chdu.cv.ua

Abstract. The method for optimal synthesis of control systems with structure change with continuous or discrete argument was proposed on the bases of maximum principle. Hamilton function is applied for differentiation of funtionals on the trajectories of matrix systems for dynamical control systems.

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Igor GAIDAICHUK, Tetyana GAIDAICHUK
MPCC Departament, Chernivtsy State University,
Ukraine, Chernivtsy, Kotsybinsky str., 2
mpcc@chdu.cv.ua

Abstract. One method for optimal control synthesis for moving robot capture on the given trajectory is proposed. It is based on the special choose of quality functional and leading optimal control synthesis problem to the variation one. The methods of variation theory allows to write in the evident form the system of differential equations for optimal control calculation .

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Oleg BABIN, Vasyl LAZORIC, Valeriy FRATAVCHAN
MPCC Departament, Chernivtsy State University,
Ukraine, Chernivtsy, Kotsybinsky str., 2
mpcc@chdu.cv.ua

Abstract. One algorithm of a solution of direct dynamic task for robots with electromechanical drives is proposed. It is based on the dynamic mathematical model of robots and differential equations electromechanical drives. The algorithm is allows creating recursion relations of a solution of direct dynamic task for robots with electromechanical drives.

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Ileana HAMBURG
Institut Arbeit und Technik Wissenchaftszentrum, Nordrein Westfalen,
Gelsenkirchen, Germany
hamburg@iatge.de

Marion HERSH
Centre of Systems and Control and Department of Electronics and Electrical Engineering,
University of Glasgow, Glasgow G12 8LT,Scotland
m.hersh@elec.gla.ac.uk

Stefan BALANICA
“Gh. Asachi” University of Iasi, Computer Science Department,
Iasi,Romania
dbalan@cs.tuiasi.ro

Abstract. This paper presents preliminary results of a project on the integration of web supported data mining techniques with fuzzy logic and neural networks to support decision-making and improve product development processes.  The integrated environment is based on CORBA and used a modular structure.  The system is particularly appropriate for sustainable product design, which takes account of environmental and social impacts in addition to technical, reliability and cost factors.

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Iulian CORDUNEANU,
“Stefan cel Mare” University of Suceava
str. Universitatii 1, RO-5800, Suceava
techno@warpnet.ro

Karen KAY SHARP
University of Baltimore,
Westminster, Maryland, USA
halligan@erols.com

Abstract. Two significant problems have surfaced in video supervised security systems. There have been challenges associated with motion detection in Closed Circuit Television and the security system’s recognition of human 3D faces. We have developed a system that secures the protected area with satisfactory results while minimizing false alarms. We try to use in detection of human faces the conversion of 2D video-images in simulate 3D objects. For human face images the reconstruct of 3D object result in a virtual 3D human head. The object of this application is to compare this virtual human head with other virtual objects from a database and the decision of this process must be interpret from the central unit of security system.

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Mihai Horia Zaharia
“Gh. Asachi” Technical University
Bd-ul Mangeron Nr. 53. A Iasi 6600
mike@cs.tuiasi.ro

Abstract. The optimal load-balancing problem is always new in distributed system development. There are many theoretical and practical approaches. Because of various restrictions, which are imposed, this can be considered a NP problem, because it is virtually impossible at this hour to reach an global theoretical approach. This paper proposes a new way in the scheduler design for distributed systems on Microsoft based operating system platforms.

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Florin RĂDULESCU
Computer Science Department, "Politehnica" University of Bucharest
Splaiul Independentei 313, sector 6, Bucharest
florin@cs.pub.ro

Abstract. The simplest way that one can think about processing a query in a distributed database is to send the query to every node and then integrate the local results. Unfortunately in many cases this approach is not a valid one. But if we enforce some restriction can it become valid? The paper presents a concept called similarly  structured  distributed  databases (SSDDB) that validate this processing method for a large class of queries. The paper presents also some query processing algorithms and methodologies for this type of distributed databases.

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Cornel POPESCU
“Politehnica” University of Bucharest
Str. Splaiul Independentei nr.313, RO-77206 Bucharest
cpop@csit-sun-pub.ro
Decebal POPESCU, Nirvana POPESCU
“Politehnica” University of Bucharest
Str. Splaiul Independentei nr.313, RO-77206 Bucharest

Abstract. In the paper is presented the results of the designing, simulation and performance evaluation of a VLIW processor. First, we made a short description of the VLIW architecture. Second, we design a VLIW processor with an instruction on 432 bits, capable to execute in parallel 13 operations. Then, we show how it could simulate a new structure using HDL languages. Finally, there are presented some results referred to the VLIW processor performance versus a PowerPC processor performance. The conclusions show the advantages of using VLIW processors into digital systems to increase the system speedup and throughput.

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Akbar KHODAPARAST-HAGHI
University of  Guilan
P.O.BOX 3756
Rasht, Iran

Abstract. Designing electrical machines requires multidisciplinary skills. Engineers must not only be expert in electromagnetic design, but also in the modes of heat dissipation from the surface of electrical machines. The scope of this brief paper is limited to thermal considerations and the main objective is only to outline a technique for study of heat dissipation from the surface of small electrical machines which may be useful at the initial design stage. This brief outline of the method indicates the usefulness of the optico-mechanical scanning pyrometer and infrared camera, targeting potential users.

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Marinela Petronela AGA
High School no. 3  Suceava
aga_marinela@hotmail.com

Abstract. This paper reviewed theoretical and practical aspects of growing silicon single-crystal from the melt with emphasis on the formation of line defects and techniques used for eliminating line defects. The factors contributing to microscopic inhomogeneities have been reviewed. This work illustrates techniques to improve the axial doping homogeneity and trends in technology of silicon crystal growth dictated by evolution of semiconductor devices.

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Calin CIUFUDEAN
Section CT3 Suceava
str. Gării no. 7, RO-5800, Suceava

Abstract. The aim of this work is to introduce an algorithm in order to calculate the reliability of a cable network for railway remote control. There are also enclosed the results we have obtained, that would help us to anticipate the following fault from the cable network.

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Calin CIUFUDEAN
Section CT3 Suceava
Str. Garii.no. 7, RO-5800, Suceava

Abstract. The different states of the system man-machine can have different effects in the exploitation of the railway transport system characterized through the multifold and complex management. Often the technological malfunction in a certain point of the system calls for measures to limit or eliminate the effects in other points. The present article proposes a mathematical model for evaluating the system man-machine in the railway transport in order to prevent the above mentioned situations.

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 St.Gh. PENTIUC *), Dragoş DANUBIANU**) , Liliana PENTIUC *),
Mirela DANUBIANU**) ,  Ileana HAMBURG ***)

*)  "Stefan cel Mare" University of Suceava- 1,
Universitatii, RO-5800 Suceava,
pentiuc@eed.usv..ro
 **) Suceava County Council,
36 Stefan cel Mare, RO-5800 Suceava,
ddanub@consiliu.suceava.ro
 ***) Institut Arbeit und Technik,
Gelsenkirchen, Germany
hamburg@iatge.de

Abstract. In this report is presented an approach to the modelling of the knowledge-based enterprise, in the aim of designing and implementing it by NITC’s system. The paper outlines the main idea for an architecture of an artificial Knowledge Management System dedicated to organisational Knowledge Management. An effective KMS must ensure that the right knowledge will be at right time in the right place in the right quantity and quality.

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Subscription and Paper Submission

Mail
prof. Adrian GRAUR
Faculty of Electrical Engineering
The "Stefan cel Mare" University of Suceava,
str.Universitatii nr.1
RO-5800 SUCEAVA
Romania

e-mail:  adriang@eed.usv.ro

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