“dunarea de jos” university of galati -...

„Dunărea de Jos” University of GALATI

Faculty of Automation, Computer Science, Electrical and Electronics Engineering

THE 4TH INTERNATIONAL SYMPOSIUM ON ELECTRICAL AND ELECTRONICS ENGINEERING

http://www.aciee.ugal.ro/ISEEE/2013

THE 4TH Edition 11-13 October, 2013

“DUNAREA DE JOS” UNIVERSITY OF GALATI

Faculty of Automation, Computer Science,

Electrical and Electronics Engineering

ISEEE 2013

4th

International Symposium on Electrical and Electronics Engineering (ISEEE)

October 11-13, 2013

Galaţi, Romania

ABSTRACT VOLUME

Galati, Romania






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The full papers will be published in the PROCEEDINGS (International Symposium on Electrical and Electronics Engineering. USB) IEEE Catalog Number CFP1393K-USB

ISBN 978-1-4799-2441-7

ISEEE-2013

2013 4th International Symposium on Electrical and Electronics Engineering (ISEEE)

October 11-13, 2013

Galaţi, România

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Copyright © 2013 by the Institute of Electrical and Electronics Engineers






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ISEEE-2013

2013 4th

International Symposium

on Electrical and Electronics Engineering (ISEEE)

October 11-13, 2013

Galaţi, Romania

The reviewers of the ISEEE-2013

Mihaela Albu Politehnica University of Bucharest

Dumitru Alexandru Nicolae Gheorghe Asachi Technical University of Iasi

Alexandru Bitoleanu University of Craiova

Frede Blaabjerg Aalborg University

Ion Bogdan Gheorghe Asachi Technical University of Iasi

Gheorghe Brezeanu POLITEHNICA University of Bucharest Maria Brojboiu University of Craiova

Sergiu Caraman "Dunarea de Jos" University of Galati

Emil Ceangă "Dunarea de Jos" University of Galati

Gianfranco Chicco Politecnico di Torino

Marian Craciun "Dunarea de Jos" University of Galati

Mihai Cretu Gheorghe Asachi Technical University of Iasi

Florin Constantinescu POLITEHNICA University of Bucharest

Brayima Dakyo Université du havre

Carl J. Debono University of Malta

Mouloud Denai University of Teesside

Radu Dogaru POLITEHNICA University of Bucharest

Radu Dobrescu POLITEHNICA University of Bucharest

Enrico De Tuglie Politecnico di Bari

Inge Gavat POLITEHNICA University of Bucharest

Grigore Fetecau "Dunarea de Jos" University of Galati

Adrian Filipescu "Dunarea de Jos" University of Galati

Marian Gaiceanu "Dunarea de Jos" University of Galati

Octavian Ghita POLITEHNICA University of Bucharest

John Hallam The Maersk Mc-Kinney Moller Institute

Elena Helerea Transilvania University of Brasov

Marian Kazmierkowski Warsaw University of Technology

Vasile Lazarescu POLITEHNICA University of Bucharest

Dorin Lucache Gheorghe Asachi Technical University of Iasi

Gheorghe Manolea University of Craiova

Viorel Minzu "Dunarea de Jos" University of Galati

Valeriu Munteanu Gheorghe Asachi Technical University of Iasi

Cristian Nichita Université du Havre

Emilia Pecheanu "Dunarea de Jos" University of Galati

Ilie Popa University of Pitesti

Claudia Popescu POLITEHNICA University of Bucharest

Petru Postolache POLITEHNICA University of Bucharest

Francesco Profumo Politecnico di Torino

Mihai Octavian Popescu POLITEHNICA University of Bucharest

Juha Röning University of Oulu






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Emil Rosu "Dunarea de Jos" University of Galati

Sergio Sibilio Seconda Università degli studi di Napoli

Maurizio Sasso University of Sannio at Benevento

Alecsandru Simion Gheorghe Asachi Technical University of Iasi

Zdenko Šimić Univers ty of Zagreb

Daniela Tarniceriu Gheorghe Asachi Technical University of Iasi

Horia-Nicolai Teodorescu Gheorghe Asachi Technical University of Iasi

Nicolae Tapus POLITEHNICA University of Bucharest

Viorel Trifa Technical University of Cluj

Ramon Vilanova Universitat Pompeu Fabra

Ion Voncila "Dunarea de Jos" University of Galati

Saurabh Sinha University of Pretoria

B.Sami Sazak Pamukkale University

Hafız Alisoy İnönü University

Vladimir Berzan Institute of Power Engineering of the ASM

Jan Haase Institute of Computer Technology Wien

Toader Munteanu "Dunarea de Jos" University of Galati

Razvan Solea "Dunarea de Jos" University of Galati

Viorel Nicolau "Dunarea de Jos" University of Galati

Mariana Dumitrescu "Dunarea de Jos" University of Galati

Bogdan Codres "Dunarea de Jos" University of Galati

Rustem Popa "Dunarea de Jos" University of Galati

Nicolae Badea "Dunarea de Jos" University of Galati

Mihaela Morega Politehnica University of Bucharest

Gelu Gurguiatu "Dunarea de Jos" University of Galati






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ORGANIZERS ORGANIZED BY Faculty of Automation, Computer Science, Electrical and Electronics Engineering

"Dunărea de Jos" University of Galaţi, Romania

In cooperation with: Ministry of National Education (Romania)

Technical Co-Sponsors:

IEEE Region8 IEEE Romania Section IEEE Power Electronics Romania Chapter IEEE Instrumentation & Measurement Romania Chapter

Honorary Chairs : Francesco PROFUMO (Italy) Marian Piotr Kaźmierkowski (Poland)

General-Chair: Marian GAICEANU (Romania)

Vice Chairs: Toader MUNTEANU (Romania) Viorel MINZU - (Romania)

Finance Chair: Ciprian VLAD (Romania)

Secretary: Rustem Popa (Romania)

Professional & Industry Liaison Chairs: Mariana Dumitrescu (Romania) Nicolae Badea (Romania) Laurentiu Frangu (Romania)

Conference Publication Chair: Marian GAICEANU (Romania)

International Program Committee

Mihaela Albu (Romania) Marian P. Kazmierkowski (Region 8, Poland)

Hafız Alisoy (Turkey) Gheorghe Manolea (Romania)

Nicolae Dumitru Alexandru (Romania) Mihai Mihaita (Romania)

Vladimir Berzan (Moldavia) Viorel Minzu (Romania)

Alexandru Bitoleanu (Romania) Nicolae Mogoreanu (Moldavia)

Frede Blaabjerg ( Denmark) Valeriu Munteanu (Romania)

Ion Bogdan (Romania) Cristian Nichita (France)

Gheorghe Brezeanu (Electron Devices Society IEEE Romania) Emilia Pecheanu (Romania)

Maria Brojboiu (Romania) Ilie Popa (Romania)

Sergiu Caraman (Romania) Petru Postolache (Romania)

Emil Ceanga (Romania) Francesco Profumo (Italy)

Gianfranco Chicco (Italy) Claudia Popescu (Romania)

Sorin Chitu (Romania) Mihai Octavian Popescu (Membership Development IEEE

Romania Section)

Mihai Cretu (Romania) Juha Röning (Finland)

Florin Constantinescu (Romania) Emil Rosu (Romania)

Brayima Dakyo (France) Maurizio Sasso (Italy)

Alexa Dimitrie (Romania) Sergio Sibilio (Italy)

Carl J. Debono (IEEE Region 8 Vice-Chair of Technical

Activities, Malta)

Zdenko Šimić (Chair, IEEE Power & Energy Society

Chapter, Croatia)

Mouloud Denai (U.K.) Alecsandru Simion (Romania)

Radu Dobrescu

(Chair of the IEEE Romania Section) Paul Svasta (Romania)

Radu Dogaru (Romania) Nicolae Tapus

(Past Chair of the IEEE Romania Section)






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Luminita Dumitriu (Romania) Daniela Tarniceriu (Romania)

De Tuglie Enrico (Italy) Horia-Nicolai Teodorescu (Romania)

Grigore Fetecau (Romania) Remus Teodorescu (Denmark)

Adrian Filipescu (Romania) Alberto Tenconi (Italy)

Octavian Ghita (Chair of the Instrumentation and Measurements

IEEE-IMS Romania) Viorel Trifa (Romania)

Liviu Goras (Romania) Ramon Vilanova (Spain)

John Hallam (Denmark) Ion Voncila (Romania)

Jan Haase (Chair–Region 8 Conference Coordination, Austria) B.Sami Sazak (Turkey)

Elena Helerea (Romania) Saurabh Sinha (IEEE Region Sections Congress

Coordinator, South Africa)

Florin Ionescu (Romania)






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Technical Committee

Chairman: Toader Munteanu (Romania)

Vice-Chairmen: Ion Voncila, Gelu Gurguiatu (Romania)

Secretary: Razvan Buhosu, Razvan Solea (Romania)

Members Alecsandru Simion (Romania)

Alexa Dimitrie (Romania)

Alexandru Bitoleanu (Romania)

B.Sami Sazak (Turkey)

Carl J. Debono (Malta)

Claudia Popescu (Romania)

Cristian Nichita (France)

Daniela Tarniceriu (Romania)

Elena Helerea (Romania)

Emil Ceanga (Romania)

Emil Rosu (Romania)

Florin Constantinescu (Romania)

Florin Ionescu (Romania)

Gheorghe Manolea (Romania)

Gianfranco Chicco (Italy)

Grigore Fetecau (Romania)

Horia-Nicolai Teodorescu (Romania)

Ilie Popa (Romania)

Ion Bogdan (Romania)

Jan Haase (Austria)

Juha Röning (Finland)

Liviu Goras (Romania)

Maria Brojboiu (Romania)

Marian Gaiceanu-Romania

Mariana Dumitrescu (Romania)

Mihaela Albu (Romania)

Mihai Culea (Romania)

Mihai Octavian Popescu (Romania)

Nicolae Dumitru Alexandru (Romania)

Octavian Ghita (Romania)

Paul Svasta (Romania)

Petru Postolache (Romania)

Radu Dobrescu (IEEE Romania Section)

Radu Dogaru (Romania)

Ramon Vilanova (Spain)

Rustem Popa-Romania

Saurabh Sinha (South Africa)

Sergiu Caraman (Romania)

Sorin Chitu (Romania)

Valeriu Munteanu (Romania)

Viorel Nicolau

Viorel Trifa (Romania)

Students Section

Chairman: Prof.Dr.Emil Rosu (Romania)

Dr. Ciprian-Daniel Balanuta

Dr. Adriana Burlibasa

Dr. Traian Munteanu

Dr. Romeo Paduraru






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Local Organizing Committee

Mihaela Andrei Mihai Vlase

Marian Barbu Viorel Nicolau

Ciprian Balanuta Maricel Oanca

Razvan Buhosu Romeo Paduraru

Adriana Burlibasa Ion Paraschiv

Daniela Cernega Rustem Popa

Bogdan Codres Gheorghe Puscasu

Cristinel Dache Razvan Solea

Teodor Dumitriu Ioan Susnea

Silviu Epure Cristian Vasilache

Gelu Gurguiatu Sergiu Ivas

Adrian Serbencu Adriana Serbencu






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Foreword

On behalf of the ISEEE 2013 Committees and from Faculty of Automation, Computer

Science, Electrical and Electronics Engineering we invite you to participate at the 2013 4th

International Symposium on Electrical and Electronics Engineering (ISEEE), which will be

held in October 2013 at "Dunarea de Jos" University of Galati, Romania. The Symposium is

traditional meeting of researchers, managers, professionals, master and PhD students in

order to exchange the experience and opinions with other experts from all over the world.

Galati is an old and beautiful town located in the Eastern part of Romania, at the mouth

of the Danube, the Siret and the Prut rivers. Galati - is the country's 5th largest town and the

biggest port situated on the maritime Danube; it is 80 miles off the Black Sea shore and

about 250 km far from Bucharest. It can be reached easily by train or by car from Bucharest,

the capital of Romania.

The symposium is intended as an international forum where an effective exchange of

knowledge and experience amongst researchers active in various theoretical and applied

areas of electrical and electronics engineering, power electronics and telecommunications

can take place.

The objective of the fourth symposium is oriented but not limited to the paradigm of

interdependency between electrical and electronic systems.

The symposium will provide presentations on the latest trends, in-depth knowledge about

achieving the highest level of technology in the field. The event will also provide a variety of

workshops, discussions, and exhibitions to fully immerse the attendees in the Symposium

pleasant atmosphere. The symposium hotels are located in the heart of the city, near to the

Danube. The social activities will also be included, like banquet, and trip on Danube.

We sincerely give you our invitation to come in Galati to admire its gorgeous views,

wealth of nature and activities, while you will enjoy our meeting information to change ideas

through international event ISEEE 2013.

Sincerely Yours,

Marian GAICEANU

General Chairman






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SS1 Natural Computing for Image and Video Processing Scientific Session

Chairpersons: Radu Dogaru

Co-Chairpersons: Ioana Dogaru

Paper 16: A Low Complexity Image Sensing Method using Pseudo-Random Scan and Recursive

Reconstruction with Radial Basis Functions

Radu Dogaru University “Politehnica” of Bucharest, Romania

A novel, low complexity image sensing method, reminiscent of compressive sensing is proposed. The

“image sensing with pseudo-random scan” (ISPRS) method allows building efficient smart cameras and

reconstruction units and differs from compressive sensing in both measuring and reconstruction stages.

Instead of calculating projections of image samples, a counting automaton selects randomly K pixels from

the sensing array. In the reconstruction stage, an iterative algorithm with linear complexity in K is

employed. Reconstruction of missing samples is done using nonlinear radial basis functions centered on

the spatial positions of measured pixels in a recursive process. Consequently, the complexities of both

sensing device (camera) and reconstruction units are substantially reduced.

Paper 17: A comparison of several classifiers for eye detection on emotion expressing faces

Raluca Boia University “Politehnica” of Bucharest, Romania


Laura Florea University “Politehnica” of Bucharest, Romania

In this paper we present a study of three classification methods applied on natural images with the goal

of detecting the eye regions. The challenge that we aim to solve is finding the eyes on faces expressing

emotions – this is extremely difficult because the shape of the facial features changes drastically when the

subject goes through an emotional state. We attempt to solve this challenge by looking for eye patterns in

an image and categorizing them using neural network classification approaches. The image features used

are integral projections encoded by TESPAR method, thus reducing the dimensionality of the problem to

vectors of 60 elements – we observed that the network classification ability becomes more robust on input

samples computed in this manner and the computational complexity is lowered, such that the system gets

closer to making real-time decisions. The paper presents experimental results of three classifiers (SVM,

Naïve Bayes, MLP) obtained on the Cohn-Kanade reference database. The measurements show that by

tuning each classifier properly and by performing a post-processing step, we can obtain accuracies of over

90%.

Paper 18: Reaction-Diffusion Cellular Nonlinear Networks for Feature Enhancement in

Dermatoscopic Images

Ioana Dumitrache University “Politehnica” of Bucharest, Romania

Alina Sultana University “Politehnica” of Bucharest, Romania


Reaction-diffusion cellular neural networks have been studied because of their properties regarding

processing time and capability of integration. The possibility of using them in image preprocessing and/or

processing and the advantages and disadvantages of doing that are analyzed. The main objective is to find

suitable sets of parameters (genes) that can enhance some useful properties of a dermatoscopic image.

These properties should later help in processing and classifying images into healthy or suspect.






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Paper 19: A pseudo-random scan perspective to the motion detection paradigm

Catalin Mitrea University “Politehnica” of Bucharest, Romania

Bogdan Ionescu University “Politehnica” of Bucharest, Romania


A novel motion detection method is proposed and its properties are investigated. It combines pseudo-

random scanning of the image with a simple and efficient feature detector inspired from cellular automata

dynamics to detect motion as noisy parts of the scanned image. The proposed method (Pseudo Random

Scan combined with Clustering Coefficient - PRS+CC) provides several useful features including fast

pattern recognition and can be adapted and implemented to detect motion and extract at some point

relevant feature. Experimental results suggest computational efficiency when compared to traditional

motion detection approaches.

Paper 20: JLCNN: An object-oriented Java package for low complexity neural networks

Ioana Dogaru University “Politehnica” of Bucharest, Romania


In this paper, a Java object-oriented package (abbreviated JLCNN) is presented. Its objective is to

implement several low complexity neural networks architectures, for further use in various embedded

systems applications. The main advantages of the JLCNN package are the rapid development of various

applications based on low complexity neural architectures and the easiness in porting such neural

architectures on various computing platforms. As any other object-oriented library it allows reducing the

development time for a new software product and provides convenient code maintenance, reusability and

portability. The library is also useful for research and educational purposes, as a basic kernel on which

new modules can be easily added. For instance it may be expanded to image processing applications.

S1 Renewable Energy Sources Scientific Session

Chairpersons: Gianfranco Chicco

Co-Chairpersons: Ciprian Vlad

Paper 28: Residential Microcogenerators for Multifamily Houses

Giovanni Angrisani Università degli Studi del Sannio

Carlo Roselli Università degli Studi del Sannio

Maurizio Sasso Università degli Studi del Sannio

Miniaturization of energy conversion devices is an ongoing process which could also be extended to

cogeneration systems. Many models of microcogenerators are being commercialized worldwide

nowadays. With respect to energy performance, many benefits are expected by these sytems, such as the

reduction of cycling losses and of transmission and distribution losses due to distributed generation.

Furthermore, the reduction of performance with the size of the device must be considered to evaluate the

effective reduction of primary energy consumption, greenhouse gas emissions and operating costs. This

paper reports the results of an energy, economic and environmental analysis performed on different

microcogenerators used to meet energy requirements of a residential building located in Southern Italy.

On the basis of thermal and electric load profile of a typical residential user, two configurations have been

considered: central and autonomous heating system. Primary energy saving is satisfactory for

microcogeneration systems considered, ranging between 16.6 % and 26.4%. A similar results is obtained

by environmental parameter with avoided CO2 emission higher than 24%. The economic analysis does

not produce positive results due to high specific investment cost of small size cogeneration units and low

operating hours per year. Finally the solution based on centralized heating system provides the best

results.






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Paper 33: Effect of Developments on a PV System Efficiency

Özge Demir Başak Muğla Sıtkı Koçman Üniversitesi

B. Sami Sazak Pamukkale University

Over the past few decades there have been many developments in photovoltaic panel components and

changes also at photovoltaic panel usage and panel locations. Because of the increase in photovoltaic

panel efficiencies, while decreasing costs, photovoltaic panel applications are more common in recent

years. Photovoltaic panels don’t harm environment while they produce electricity, they are silent and do

not require moving components. The present work introduces historical development of photovoltaic

panels, the place of photovoltaic panels in renewable energy resources, classification of factors that affect

photovoltaic systems’ efficiency. Historical developments of photovoltaic system components explained

and every component’s effect on photovoltaic system efficiency examined. Finally a cost ignored

photovoltaic system with maximum efficiency suggested.

Paper 46: Micro CHP with fuel cell for boiler supply

Nicolae Badea University “Dunarea de Jos” of Galati, Romania

Ion Paraschiv University “Dunarea de Jos” of Galati, Romania

Maricel Oanca University “Dunarea de Jos” of Galati, Romania

This paper shows the experimental realization of a complete autonomous cogeneration system

comprising of a fuel cell unit and a gas condensing device. Both the electrical and thermal output of the

fuel cell is 0.72 kilowatt, while the total thermal output of the fuel cell including the condensing heating

device is 25 kilowatts. The present paper also presents all the components and monitoring measurements

of the electrical and thermal values. The thermal control strategy is adopted for this system. On the

overall, this unit serves as „electricity producing heaters” and offers a highly efficient alternative to

conventional heating systems.

Paper 48: Air cooling of photovoltaic panels from Passive House located inside the Polytechnic

University of Bucharest

Croitoru Ana-Maria University “Politehnica” of Bucharest, Romania

Aurelian Craciunescu University “Politehnica” of Bucharest, Romania

This article presents the performance analysis of a conventional hybrid photovoltaic/thermal air

heating collector. An excel spreadsheet is developed and various parameters are calculated for single-

glass configuration. Results are presented to show the effect of various design and operational parameters

on the performance of a system. These results are useful for designing such systems more scientifically.

Paper 61: Low cost control solution to optimize autonomous wind energy conversion

Ciprian Vlad University “Dunarea de Jos” of Galati, Romania

Adriana Burlibasa University “Dunarea de Jos” of Galati, Romania

Toader Munteanu University “Dunarea de Jos” of Galati, Romania

Based on a wind system equipped with a permanent magnet synchronous generator (PMSG), a

rectifier, a chopper and a continuous load, three power optimization methods are investigated. The main

objective of this paper aims a control solution for wind energy conversion optimization by using

estimated wind speed in relation with optimal electromagnetic torque, when the power coefficient and the

optimal tip speed ratio values are known. The investigated control methods are: a classical method based

on three cascade control loops (a major power loop, an intermediate rotational speed loop and a inner

current loop); a control method with two control loops (for rotational speed and load current), part of the






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previous control strategy but improved with a rotational speed reference provided as a dependence of

estimated wind speed based on the electromagnetic torque given by the system frequency converter; and a

third control strategy similar with the second one, the difference being given in this case by the estimated

wind speed in relation with the electromagnetic torque generated as a dependence of load current and

chopper duty ratio. Comparable results obtained with these methods and also their advantages are

presented.

Paper 68: Photovoltaic lighting for an educational room

Laurentiu Alboteanu University of Craiova, Romania

Gheorghe Manolea University of Craiova, Romania

The paper gives one solution concerning the modality of power supply for lighting in a laboratory for

education students. Are presented aspects regarding to system design lighting and photovoltaic source.

For sizing of lighting system utilization factor method was used. Design and simulation of lighting system

was performed using Dialux dedicated program. Photovoltaic system was dimensioned based on a

specific algorithm. Validation of the proposed solution for photovoltaic system was made using Homer

dedicated numerical simulation program

Paper 38: Signal Processing Software Techniques for the Monitoring and the Diagnosis of the Wind

Turbines

Balan Horia Technical University of Cluj-Napoca

Buzdugan Mircea Technical University of Cluj-Napoca

The paper presents the implementation of a software for the analysis of vibration generated by wind

turbines components. This software application has been built in the LabVIEW programming

environment. For the vibration analysis and fault detection have been used several techniques, like:

wavelet analysis, envelope detection, FFT analysis, Cepstrum analysis, Vector RMS analysis. Vibration

signal envelope detection was performed using a virtual instrument based on Hilbert transform and rms

analysis was performed using virtual instrument “Vector RMS” specifically designed for vibration

analysis. The experimental results were obtained by measuring the vibration signals of a bearing with a

simulated fault on the outer raceway.

S2 Electronic Circuits and Systems, Pattern Recognition

and Signal Processing Scientific Session

Chairpersons: Florin Constantinescu

Co-Chairpersons: Valentin Sgârciu

Paper 1: Bioelectromagnetism Laboratory - Case Study

Octavian Baltag "Grigore T. Popa" University of Medicine and Pharmacy of Iasi, Romania

Doina Costandache"Grigore T. Popa" University of Medicine and Pharmacy of Iasi, Romania

Miuta Rau "Grigore T. Popa" University of Medicine and Pharmacy of Iasi, Romania

The paper presents a case study concerning the emplacement of a laboratory dedicated to

bioelectromagnetism researches. It also shows the complex structure of the laboratory and related

facilities. Laboratory research is designed in two frequency ranges of magnetic and electromagnetic

fields: biomagnetic fields of pT intensity and (0 ÷ 500) Hz frequency range, explored by

biomagnetometry; very low energy electromagnetic radiation corresponding to thermal radiation in the

microwave range. The installation components consisting of a nonferromagnetic shielded room, lined






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inside by microwave absorbent material with pyramidal geometry and a complex triaxial coils system to

control the ambient magnetic fields: geomagnetic components and those due natural variations, the fields

produced by human activity - the movement of masses of metal, vehicles, magnetic field of 50 Hz etc.

The installation permits the detection of magnetic activity of the heart (magnetocardiogram – MCG) and

the measurement of the internal temperature of living structures using the microwave radiometry. This is

an application for non-invasive early breast cancer detection. Performances of the installation are

presented.

Paper 2: Analysis of switching in a DC circuit

Adrian Marin University “Politehnica” of Bucharest, Romania

Mihai Octavian Popescu University “Politehnica” of Bucharest, Romania

This paper presents an analysis of the static switching in a DC circuit. Power semiconductor devices

are used in various electrical switchgear with static switching because they are very fast and do not

require maintenance. In the static switchgear there is not the electric arc as in the case of

electromechanical switchgear. By the simulations performed in this work were obtained the waveforms of

currents and voltages that occur during the switching. The analysis conducted in this paper highlights the

advantages and disadvantages of static switching in a DC circuit.

Paper 53: Capacitive coupling interference phenomena between three conductors on the surface of

PCB

Alina Elena Dumitru Radu University “Politehnica” of Bucharest, Romania

Roxana Rosca Ionita University “Politehnica” of Bucharest, Romania

Mihai Ocatavian Popescu University “Politehnica” of Bucharest, Romania

Capacitive coupling occurs in the presence of the electric field on any metal conductor.

The purpose of this paper is to emphasize the capacitive coupling which appears between three

conductors placed in a metallic box if the voltages difference between circuits is large.

C1, C2 and C3 are three different potential conductors located on a wiring of Pertinax. The problem is

related to the appearance of some disruptive voltages on parallel capacitive coupled conductors. This

voltage may appear at the air filters for air purification or electrostatic chargers for electrostatic copy

machine.

Paper 79: VIBSYS: Integrated Didactic and Research Platform for Vibration Analysis

Grigore Stamatescu University “Politehnica” of Bucharest, Romania

George Sterpu University “Politehnica” of Bucharest, Romania

Valentin Sgârciu University “Politehnica” of Bucharest, Romania

The paper introduces a new system for vibration acquisition and analysis for rotating machinery -

VIBSYS. It includes a mechanical structure, data acquisition subsystem and a software system developed

as a virtual instrumentation project. The latter implements the configuration of the data acquisition, signal

processing steps and provides the user with an intuitive and easy to operate user interface. The main goal

of the proposed approach is to enable bearing defect detection as an initial step in a complete procedure of

predictive maintenance. Experimental results, based on a comparative study on two bearing types using

envelope analysis techniques are also discussed. The platform plays a dual role as a didactic and research

stand through its modular and scalable structure as well as versatility.






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Paper 81: Cell-based Sensor Network for Complex Monitoring at Home of Patients with Chronic

Diseases

Andrei Maciuca University “Politehnica” of Bucharest, Romania

Mircea Strutu University “Politehnica” of Bucharest, Romania

Dan Popescu University “Politehnica” of Bucharest, Romania

Grigore Stamatescu University “Politehnica” of Bucharest, Romania

In order to improve the quality of life for the elderly or people with chronic disease, the paper proposes

a smart cell-based sensor network for home monitoring. The cell is considered to be a small sensor

network which is situated into the patient’s house. It is formed from mobile and fixed sensors, disposed

on three levels. The first level has body sensors attached to the patient that monitor different health

parameters, patient location, position and possible falls. The second level is dedicated for ambient sensors

and routing inside the cell. The third level contains emergency ambient sensors that cover burglary events

or toxic gas concentration, distributed by necessities. In order to reduce energy consumption and radiation

level, adaptive rates of acquisition and communication are used. Experimental results on body sensors

and ambient ones are presented in the last section.

Paper 88: A new calibration method for current steering DACs

Catalin Brinzei University “Politehnica” of Bucharest, Romania

Florin Constantinescu University “Politehnica” of Bucharest, Romania

A new calibration method for current steering DACs (digital to analog converters), whose main idea is

to add compensation currents of the same value to the most sensitive current sources, is proposed. Some

DC Monte-Carlo analyses are used to choose the optimal value for the correction current. The choice of

the most sensitive current sources as well as the finding of the optimal combination of the corrected

sources are done by steady state simulations and measurements. The SFDR (spurious free dynamic range)

of a 8 bits DAC is improved with 5.5 dB using this method.

S3 Artificial Intelligence Scientific Session

Chairpersons: Mihai Octavian Popescu

Co-Chairpersons: Viorel Nicolau

Paper 51: Robots Collision Avoidance Using Learning through Imitation

Aurel Fratu TRANSILVANIA University of Brasov, Romania

Jean-Paul Becar University of Valenciennes, France

This paper deals with the collision avoidance of the cooperative robots using the learning through

imitation. Each physical robot acts fully independently, communicating with corresponding virtual

prototype and imitating her behavior. Each physical robot reproduces the motion of her virtual prototype.

The estimation of the collision-free actions of the virtual cooperative robots and the transfer of the virtual

joint trajectories to the physical robots who imitate there virtual prototypes, are the original ideas. We

tested the present strategy on several simulation scenarios; involving two virtual robots that each must

cooperate with other and estimating collision-free actions. The effectiveness of the proposed strategy is

discussed by theoretical considerations and illustrated by simulation of the motion of two cooperative

manipulators. It is shown that the proposed collision-free strategy, while tracking the end-effector

trajectory, is efficient and practical.






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Paper 58: A novel bio-signal acquisition system for brain computer interfaces

Lajos Losonczi Lambda Communications SRL, Romania

Lászlo F. Márton Sapientia University Tirgu Mures, Romania

Tihamér S. Brassai Sapientia University Tirgu Mures, Romania

Laszló Bakó Sapientia University Tirgu Mures, Romania

Loránd Farkas Lambda Communications SRL, Romania

The aim of this work is to present newly developed electro-technological and signal processing tools

that provide brain-computer interface (BCI) systems with increasingly advanced functions. A BCI allows

users to record signals upon which are possible to act on their environment by using only brain-activity,

without using peripheral nerves and muscles. EEG (Electroencephalogram) signals are the recorded

potentials of collective activity of synchronized cortical cell populations chained to an external system.

Our basic tasks are to improve the signal-to-noise ratio and to resolve spatial and temporal impact of the

measured signals on the external environment. For these reasons we propose a completely new concept of

active electrodes, named Smart Active Electrodes (SAE).

Paper 89: Diagnosis of NPP systems using artificial intelligence – Case study Primary Heat Transport

System

Magdalena Vlad University “Politehnica” of Bucharest, Romania

Razvan Popovici R.A.A.N.- Subsidiary of Technology and Engineering for Nuclear Projects

Mihai Octavian Popescu University “Politehnica” of Bucharest, Romania

Claudia Laurenta Popescu University “Politehnica” of Bucharest, Romania

At industrial processes management, especially of those of great complexity, the aspects connected to

their maintenance into the limits of good running, assuring both quality and continuity, become a priority.

In the supervision context, the processes managed must have a safe functioning and a great availability,

so as the incident tolerance becomes more and more important. In this article we introduce you a expert

system for controlling and monitoring primary heat transportation system from NPP on-line, which is

considered of great actuality if we take in consideration that it is a device based on computer and used by

keyboarder in order to assist them in controlling complex systems running. The base of the entire

scaffolding that competed to surveillance, control and monitoring of the electric devices from NPP is

constituted from the acquisition and command devices. On one hand, between the devices enumerated

above there is a tight collaboration, information from technological process and on the other hand the

possibility of remote control of the technological process.

Paper 91: On Fuzzy Predictive Diagnosis of Pump-Motor Group of Oleo-Pneumatic Drive

Mechanisms

Viorel Nicolau University “Dunarea de Jos” of Galati, Romania

Razvan Solea University “Dunarea de Jos” of Galati, Romania

Marian Gaiceanu University “Dunarea de Jos” of Galati, Romania

Mihaela Andrei University “Dunarea de Jos” of Galati, Romania

IO-type oil-based high-voltage circuit breakers are acted by oleo-pneumatic mechanisms (MOP).

Pressure recovery circuit of MOP is based on pump-motor group, which presents the highest fault rate of

all circuit breaker components. Its failure goes to the impossibility of switching that circuit breaker.

Therefore, the predictive diagnosis of pump-motor group is very important for good functioning state of

the circuit breaker. In this paper, on-line predictive diagnosis and early detection of the fault tendencies

are studied using fuzzy logic. Some expert rules are generated based on the behavior analysis of MOP-

type drive mechanism. A fuzzy system for predictive diagnosis is proposed. Also, simulation results are

presented.






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Paper 31: Sewer Network Discharge Control Using a Fuzzy Logic Approach

Daniela Carp University “Dunarea de Jos” of Galati, Romania

Marian Barbu University “Dunarea de Jos” of Galati, Romania

Viorel Minzu University “Dunarea de Jos” of Galati, Romania

Sewer networks are usually controlled a hierarchical control system. This system has a three-layer

structure: the lower level consists of the hardware control loops from the storage reservoirs, the medium

level gives the setpoint for the control loops from the lower level and upper level has a supervisory role of

the entire system. This paper approaches the medium control level by using fuzzy logic controllers in

order to avoid or at least lead to a significant reduction of discharges from the sewer networks. The

proposed structure is validated through numerical simulation.

Paper 49: Performance Evaluation of a Fuzzy-Based QoS Support Implementation

Andra Elena Iulia Pastrav Technical University of Cluj-Napoca, Romania

Eugeniu Smenciuc Technical University of Cluj-Napoca, Romania

Tudor Palade Technical University of Cluj-Napoca, Romania

Ancuta Bara Technical University of Cluj-Napoca, Romania

Emanuel Puschita Technical University of Cluj-Napoca, Romania

The task of Quality-of-Service (QoS) routing is to find a path in the network that satisfies certain

constraints on metrics such as delay, jitter, bandwidth and packet loss. All routing algorithms are

designed for intra-domain QoS support, and when multiple technologies are interconnected, a proper end-

to-end QoS support cannot be guaranteed. This paper proposes a method for the most suitable end-to-end

path selection in a unified network architecture. The solution is implemented in two phases: firstly, the

network is tested in order to obtain a list of all possible routes and secondly, the best path is selected

using the fuzzy logic algorithm. This solution has been implemented and validated through network

simulations.

Paper 98: Error Detection and Correction using LDPC in parallel Hopfield Networks

Constantin Anton University of Pitesti, Romania

Laurenţiu Ionescu University of Pitesti, Romania

Ion Tutănescu University of Pitesti, Romania

Alin Mazăre University of Pitesti, Romania

Gheorghe Şerban University of Pitesti, Romania

Low Density Parity Check (LDPC) coding is a classical method for the detection and correction of

errors. Its problem is the relatively complex operations which must be performed at encoding, and

especially at decoding, to detect and correct errors caused by communication channels. We present a

solution for the errors correction using regular LDPC and Hopfield network-based associative memories.

Our solution solves this problem by using an associative memory based on the Hopfield network on the

decoding stage, which stores the correct code words. This memory tends to transform the code words

received with errors in errors free code words. We improved the ability of the associative memory by

storing the code words in a specific format (pairs with their inverses, the constant number of “1” bits).

These conditions are met by using LDPC coding. To be viable in communications, which require real-

time correction, our proposed solution has used Hopfield networks operating in parallel, fully integrated

into the Field Programmable Gates Array (FPGA) circuit.






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S4 Power Systems Scientific Session

Chairpersons: Dorin Lucache

Co-Chairpersons: Elena Bicova, Nicolae Badea

Paper 50: European Prosumers In Romania's Energy Market

George-Vlad Badea Master Graduate at UvA

Nicolae Badea University “Dunarea de Jos” of Galati, Romania

The present paper aims to highlight how the transition from tradition energy consumers to prosumers

is being promoted in the European Union and what the actual status in Romania is. Starting from the main

European policy pillars, the paper presents the rationale behind the transformation of consumers into

prosumers. The paper deals with the relevant European legislation promoting this concept before

emphasizing the actual status of Romanian legislation in this matter. Finally, a study case stresses the

changes needed to accommodate prosumers in Romanian Energy Law.

Paper 57: The analysis of evolution indicators of the energy security in electricity and heat sector of

the Republic of Moldova

Elena Bicova Institute of Power Engineering of Academy of Sciences of Moldova

Vladimir Berzan Institute of Power Engineering of Academy of Sciences of Moldova

Larisa Moraru Institute of Power Engineering of Academy of Sciences of Moldova

Analysis of the state's energy security is relevant to determine the problems into energy sector which

are need mostly of development and investment. The comprehensive study with different aspects of the

energy sector is is held (technical, economic, environmental and others). This paper presents the results of

a study for the sector of production of electricity and heat, what was done with method of indicative

analysis. The structure and current state of the sector was described with 10 indicators. The retrospective

analysis was performed for the time period of 20 years. The forecasting trend of generalized integral

indicator of the short-term (3 years) shows the growth of risk in the sector. The variants expansion

existing power plants and construction a set of dispersed small combined power plants are considered as

required measures

Paper 59: Integrated solutions based on neural networks for optimizing energy management in a

microgrid

Otilia Elena Dragomir Valahia University of Targoviste, Romania

Dragomir Florin Valahia University of Targoviste, Romania

This article proposes the integration of an intelligent energy management system, in a microgrid with

distributed production of energy from renewable sources (PD-RES), equipped with artificial intelligence

elements (neural networks), capable of load forecasting on short time horizon. In relation with identified

or predicted situations, the decision support system that integrates these solutions, proposes, to consumer-

producer (prosumer) of “green” energy, to act in a proactive manner for: reconfiguration of the

microgrid’s architecture, improving profits, and reducing the microgrid’s vulnerability. From a practical

point of view, the article results are based on data monitored form a three phase microgrid with 25kW

installed power, equipped with energy storage elements, produced from renewable energy sources (wind

and sun)






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Paper 86: Application for Control Consumers Using Mobile Phone

Carmen Lungoci Transilvania University of Brasov, Romania

Laura Lelutiu Transilvania University of Brasov, Romania

Present paper deals with the design and development of a device that controls and monitors remote

processes or external devices. This device can be used as a component embedded into an automation

system of an intelligent house, for managing the energy consumption in lighting, air conditioning,

heating. The practical result obtained is a test board plugged to an external device which can be any kind

of sensor. The application is used in didactical laboratories for electrical engineering and computers

program.

Paper 95: Analysis and Software Computation to Increase the Power Quality in an Industrial

Electrical Network

Mariana Dumitrescu University “Dunarea de Jos” of Galati, Romania

To evaluate the potentially negative impact of non-linear and unbalanced loads on the power system

quality and to study possible techniques that will minimize this impact is the main purpose of the

proposed paper. Starting from the known loads of a real delivery power system, we simulate the real

operational regimes, including measurements of the harmonic distortion. Edsa Paladin software is used to

analyze the active and reactive power flow with respect to the bus tension levels calculations, for

balanced and un balanced operational stages.

Paper 56: Numerical Modelling of Wave Processes in Electric Lines with Variable Parameters

Vladimir Patsyuk Institute of Power Engineering of the Academy of Sciences of Moldova

Vladimir Berzan Institute of Power Engineering of the Academy of Sciences of Moldova

Galina Ribakova Institute of Power Engineering of the Academy of Sciences of Moldova

Electrical transmission lines are the most important elements of modern electrical power systems.

Numerical method for calculation of electrical circuits with distributed losses and parameters variable

in time is elaborated and described in this paper. It has been proposed to use the energy integral in order

to estimate the accuracy of numerical solutions. The elaborated numerical scheme, named Albatross

method, is conservative with minimal dissipation and dispersion. Due to these properties computational

error does not accumulate, that gives possibility to realize transparent calculations of nonstationary

solutions without loss of accuracy at large time intervals corresponding to 300…500 electromagnetic

waves run along the line length right up to steady-state regime.

Results of calculation in non-homogeneous circuits with distributed parameters are presented. These

results can be used as sample solutions for elaboration and for accuracy verification of some new

approximate methods for numerical solution of some problems in electrical and power engineering.

Solutions of these problems have been obtained by means of operator method, complex amplitude

method, Fourier variable separation method as well as by Albatross numerical method. Comparison

between physical and mathematical experiments during analysis of different regimes in half-wave

electrical transmission line has been executed. Also, comparison of accuracy of the solutions obtained by

analytical method, by Finite Difference Time Domain (FDTD) method and by Godunov’s scheme for

telegraph equations has been carried out. In particular, FDTD method has some limited application for

solving the telegraph equations due to the fact that it is of the second order of accuracy.






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Paper 34: Using Numerical Weather Forecast to Predict Power Losses on Transmission Lines

Ileana Baran University “Politehnica” of Bucharest, Romania

Tudor Leonida University “Politehnica” of Bucharest, Romania

Dorian Sidea University “Politehnica” of Bucharest, Romania

The paper presents the first version of a method developed to forecast resistive power losses associated

to transmission lines. In the first stage the procedure computes the conductor temperature, taking into

account a non-steady-state heat balance equation. The terms of the heat balance are evaluated using as

input data the numerical weather forecast combined with Geographical Information System mapping of

the line assets, and the day ahead hourly forecast of the power flow. The resulting conductor temperature

is then used to correct the value of the electrical resistance and finally to evaluate the resistive power

losses. The method was applied for two existing 400 kV transmission lines, and several forecasts obtained

for the conductor temperature and specific power losses are presented.

S5 Electrical Machines I Scientific Session

Chairpersons: Elena Helerea

Co-Chairpersons: Ion Voncila

Paper 82: Analysis of Magnetic Field Distribution in Induction Motors with Broken Rotor Bars

Ciobanu Anca Transilvania University of Brasov, Romania

Elena Helerea Transilvania University of Brasov, Romania

This paper proposes a detailed approach of the broken bars in the induction motors by analyzing the

magnetic field distribution with the use of finite element. Results show accurately that the magnetic

saturation is high in the area of broken bars and that the magnetic field waveforms carry the necessary

information to detect this type of fault. The obtained information may be used to develop an on-line

diagnosis system. For the finite element simulation a 7.5 kW, 4 pole induction motor was modeled and

two types of core materials were used.

Paper 99: Electromagnetic Environment Characteristics in an Urban Area

Marius Daniel Calin Transilvania University of Brasov, Romania

Cornel Ursachi Transilvania University of Brasov, Romania


The focus of this paper is the investigation of electromagnetic environment characteristics, especially

in open spaces for urban areas. The measurements were done in seven areas of the Brasov city, Romania,

representative from electromagnetic point of view. The statistic method of data processing has been

applied. The obtained values of electric field intensity and electromagnetic field exposure ratios are under

the limits imposed by ICNIRP regulation. The variability of measurements shows that the characteristics

of electromagnetic environment should be regularly assessed in order to understand the trends in terms of

electromagnetic radiation.

Paper 35: Flux-density space-harmonics minimization for an axial-flux permanent-magnet machine

Adrian Pop Technical University of Cluj Napoca, Romania

Mircea Radulescu Technical University of Cluj Napoca, Romania

Horia Balan Technical University of Cluj Napoca, Romania

The content of flux-density space-harmonics in axial-flux permanent-magnet machines (AFPMMs) is

an important concern to the machine designer due to its impact on machine performances. In AFPMMs,






21

the space-harmonics are related to the flux-density and the MMF distributions in the airgap, which are

mainly determined by the PM excitation. This paper proposes two different approaches to study the flux

density in the airgap. The finite-element and analytical methods are jointly developed in order to model

and compare the flux density waveforms. Many optimization methods have been proposed in order to

optimize the design of PM machines. In this paper, the authors investigate the optimal PM design in order

to minimize the space-harmonics distribution using the sequential quadratic programming (SQP)

optimization algorithm. By selecting the appropriate PM shape and size, it is possible to remove the

undesirable harmonics. Using the SQP, the PM shape is optimized, and the harmonics content is notably

reduced. The optimal solutions given by the FE model are then validated.

Paper 44: Considerations on 2D numerical modelling of permanent magnet synchronous motors for

driving electric bicycles

Silvia-Maria Diga University of Craiova

Constantin Stoica University of Pitești, Romania

Nicolae Diga University “Politehnica” of Bucharest, Romania

Maria Brojboiu University of Craiova, Romania

In this paper are presented the results of 2D numerical modelling performed by the authors using the

dedicated software Flux 9.3. for a permanent magnet synchronous motor for driving electric bicycles. We

have completed for this purpose all the necessary steps to the effective design: defining geometrical

parameters and coordinate system; faces generating of the model; creating regions and the mesh model;

the default introducing of the materials; assigning material from the database program for regions of the

model; generation of a file with the extension ". tra" and finally displaying the results in magnetostatic

regime. These results were compared with those obtained by calculation, demonstrating their validity and

compliance with allowable limits of magnetic stresses.

Paper 63: Impact of Three-Phase Voltage Dips on the Induction Motors – An Experimental Study


Lepadat Ionel Transilvania University of Brasov, Romania

Ciobanu Anca Transilvania University of Brasov, Romania

The paper deals with the investigation of the effects of three-phase voltage dips on the induction

motors. The experimental set-up comprises a dip generator, a three-phase analyzer and a control system.

As model, a three-phase squirrel cage induction motor of 1.5 kW / 0.4 kV is tested with balanced three-

phase individual voltage dips of different magnitudes and durations, and of different rectangular and non-

rectangular forms. A comparative analysis is done regarding the wave form and shape of rms three-phase

currents and voltage dips curves. The decreasing of current and power of induction motor was correlated

with voltage dip magnitudes. The experimental determinations of the effects of balanced three-phase

voltage dips are compared with characteristics of induction motor operating in normal conditions.






22

S6 Computer Vision Scientific Session

Chairpersons: Silviu Ioan Bejinariu

Co-Chairpersons: Nicoleta Angelescu

Paper 21: CBIR System Based on Texture Characterization

Nicoleta Angelescu Valahia University of Targoviste


Marius Georgian Ionita Valahia University of Targoviste

The continuous development of communication technology and computers led to the creation of huge

archives of multimedia data in various application areas such as medicine, entertainment, education and

services online. This is similar to the increase in the amount of alpha-numeric data from the first

appearance of computers, which led to the development of database management systems (DBMS -

Database Management Systems). Search supposes finding relevant images in a large image collection

made by the user. Relevance is determined by the nature of the application.

Paper 62: A Spatial Pyramid Approach for Texture Classification

Andreea-Lavinia Popescu University “Politehnica” of Bucharest, Romania

Radu Tudor Ionescu University of Bucharest, Romania


Texture classification, texture synthesis, or similar tasks are an active topic in computer vision and

pattern recognition. This paper aims to present two spatial pyramid representations for texture

classification. Most techniques designed for texture classification are based on machine learning. Images

are usually represented as feature vectors, which are then used to train a classifier. In the spatial pyramid

representation, images are divided into increasingly fine sub-regions (bins) and features are extracted

from each bin. This representation is able to capture details about the fractal structure of the texture

images. Two experiments are conducted on popular texture classification data sets, namely Brodatz and

UIUCTex. In the experiments, several kernel representations and kernel classifiers are combined and

evaluated. It seems that the spatial pyramid in combination with intersection kernel and Kernel

Discriminant Analysis gives the best results. The proposed pyramid representations can improve the

accuracy by as much as 5% over the standard feature representation, showing that the pyramid structure is

indeed useful for texture classification.

Paper 78: A Novel Iris Clustering Approach Using LAB Color Features

Adrian Ciobanu Institute of Computer Science, Romanian Academy, Iasi Branch

Petru Radu School of Engineering and Digital Arts, University of Kent, United Kingdom

Tudor Barbu Institute of Computer Science, Romanian Academy, Iasi Branch

Mihaela Costin Institute of Computer Science, Romanian Academy, Iasi Branch

Silviu Ioan Bejinariu Institute of Computer Science, Romanian Academy, Iasi Branch

The results of color clustering for the iris images in the UBIRISv1 database are presented. The iris

colors are characterized by feature vectors with 80 components resulted from histograms computed in the

CIELAB color space. The feature extraction is applied to the first session eye images after undergoing an

iris segmentation process. An agglomerative hierarchical algorithm is used to organize 1.205 segmented

iris images in 8 clusters based on their color content.






23

Paper 30: A Study about MFCC Relevance in Emotion Classification for SRoL Database

Marius Zbancioc Technical University "Gheorghe Asachi" of Iasi, Romania

Monica Feraru Institute of Computer Science, Romanian Academy of Iasi branch, Romania

The focus of this paper is to establish the relevance of MFCC coefficients in the emotion recognition

for Romanian language, comparing with prosodic features: F0 fundamental frequency, F1-F4 formants,

jitter and shimmer. We noted that the accuracy recognition rate is improved by using MFCC feature

vectors around 90%. In our previous works we obtained only 65% percent in emotion classification

without MFCC coefficients. We also studied the relevance of the derivative ΔMFCC and ΔΔMFCC. The

obtained results are remarkable considering that the SRoL database contains only “normal” voices. In

literature, similar performance is reported usually on the databases with professional voices.

Paper 47: Image Registration using Bacterial Foraging Optimization Algorithm on Multi-core

Processors

Silviu Ioan BejinariuInstitute of Computer Science, Romanian Academy, Iasi Branch, Romania

In this paper is proposed a parallel approach of the Bacterial Foraging Optimization Algorithm

(BFOA) used for image registration (IR) on multi-core processors based systems. IR is an optimization

problem computing optimal parameters of the transform to align a source image to a given model by

maximizing a similarity measure. IR is an important step in image fusion: the fusion result is affected by

the registration result quality. A relatively new registration method is based on the Bacterial Foraging

Optimization Algorithm (BFOA). Depending on the used optimization technique and similarity measure,

the IR process may be time consuming. A comparison of the sequential and proposed parallel execution

on multi-core systems, for pixel intensity and point feature based registration is presented.

Paper 97: Image Segmentation Processing - Some Techniques and Experimental Results.

A comparative study of the concepts of some segmentation techniques

Mircea Weingart University “Politehnica” of Bucharest, Romania

Orest Vascan Crescendo International

Image segmentation plays an important role in a pre-processing phase of images having as objective a

partition of the image into components or regions of interest for a more detailed analysis of one or more

of these regions. Image segmentation may also be used as a pre-processing phase for a better image de-

noising or de-blurring that will be done in a separate image processing phase. In this article we study

mostly theoretical concepts and some experimental results for evaluation of some image segmentation

techniques and their role for a better analysis of image details.

Paper 100: Image Segmentation Processing - Some Techniques and Experimental Results.

A study of the experimental results of some segmentation techniques

Mircea Weingart University “Politehnica” of Bucharest, Romania

Orest Vascan Crescendo International

Image segmentation has an important role in preprocessing images .It partitions the image into

components or regions of interest for a more detailed analysis. In this article we study - by experiments

and results - some image segmentation techniques and their role for a better analysis of image details.






24

S7 Electrical Drives Scientific Session

Chairpersons: Jesús Ulises Liceaga-Castro

Co-Chairpersons: Ciprian Vlad

Paper 24: Direct Current Motor with Permanent Magnet Energy Injection

Marius Georgescu University Transilvania of Brasov, Romania

This paper presents an original dc motor concept and prototype based on a permanent magnets

injection. It was built as an experimental model and certified by a patent of invention in Romania. This

motor can be controlled by an adjustable dc supplying voltage as electric input source and by another

adjustable magnetic device based on permanent magnets. The main original aspect is the same as a part of

the permanent magnets (PM) are situated inside of the dc motor rotor (as armature) and the other part of

them is outside of the motor. The outside permanent magnets are connected and grouped, constituting a

magnetic device as adjustable magnetic energy source. Both the PM parts (armature and magnetic device)

are related between them. As first application field has been identified the automotive propulsion.

Paper 43: Speed Control of a 4 Phases Variable Reluctance Motor

Jesús Ulises Liceaga-Castro UAM-Azcapotzalco, Mexico

Gerardo Nuñez Eli Lilly, Mexico

Irma Irasema Siller Alcalá UAM-Azcapotzalco, Mexico

Eduardo Liceaga-Castro UANL, Mexico

Jorge Miguel Jaimes Ponce UAM-Azcapotzalco, Mexico

In a previous paper a SISO non-linear model of a 4-phase variable reluctance (VR) motor without

saturation in a normal form was developed. This model assumes an appropriate logic on the driver or

power inverter in order to achieve a simple structure for each phase of the motor. Based on this model in

this paper the analysis and design of a speed control system for a 4 phases VR motor is designed. This

represents a first approach in which a controller based on the classical non-linear state feedback

linearization followed by PI control is applied. Using parametric information of a real VR motor digital

simulations demonstrate that the proposed satisfies performance and robustness conditions.

Paper 92: Power Management Solutions for Hybrid Electric Vehicles

Alexandru Onea Technical University of Iasi, Romania

Cezar Babici Technical University of Iasi, Romania

This paper describes three control strategies for a hybrid electric vehicle, in order to reduce the fuel

consumption, and to maintain a reasonable state of charge (SOC) of the battery at the end of the drive

cycles. The main goal is to split the requested power from the driver between the internal combustion

engine (ICE), and the electric motor (EM), such way to decrease the fuel consumption, and to maintain

the dynamic performances. The algorithms were tested using Matlab Simulink and ADVISOR interface.

All three strategies are applied to a parallel hybrid power train. The first solution is an original rule-based

strategy with the electric motor as a primary power source. The second one is a distributed control

strategy for a hybrid electric vehicle. The vehicle is built from control nodes, every one of them having

the same priority. The control laws are based on the dc-bus signaling. Every source of power (control

node) is entering or leaving the network (dc-bus) depending on the voltage thresholds. The last one is a

control strategy for hybrid electric vehicles based on the dynamic programming. Using the fuel converter

(FC) fuel map, and SOC of the battery pack, it was designed an algorithm that will choose at each

moment the required torque and speed from the first and second source of power.






25

Paper 60: Using Renewable Energy Sources For Electric Vehicles Charging

Ciprian Vlad University “Dunarea de Jos” of Galati, Romania

Mihai Adrian Bancila University “Dunarea de Jos” of Galati, Romania

Toader Munteanu. University “Dunarea de Jos” of Galati, Romania

Gabriel Murariu. University “Dunarea de Jos” of Galati, Romania

This paper presents several possibilities for electric power supply from renewable sources of electric

vehicle charging stations. The supply system sizing and the economic analysis were performed using the

specialized computing facility Homer energy and the local resources data needed to optimize the system

were taken from the RETScreen databases. In this way we could choose the photovoltaic panels

depending on the solar radiation and the wind turbines according to the wind class of the region. The

location chosen for the charging stations is Huşi city, Vaslui county, at an average altitude of 82 m above

sea level, accessible from the European road E581. The results obtained with the three systems analyzed

by Homer simulation showed that the choice of an appropriate power charging station should take into

account both the local resources and the policies to use and encourage renewable energy in order to

establish the technically and financially feasibility of the system.

S8 Electrical Machines II Scientific Session

Chairpersons: Corneliu Marinescu

Co-Chairpersons: Ion Voncila

Paper 40: Method for Iron Losses Assessment in Electromagnetic Devices Operating in Distorted

Regimes

Ioana-Gabriela Sirbu University of Craiova, Romania

Lucian Mandache University of Craiova, Romania

This paper presents a method to assess the losses in electromagnetic devices starting from accurately

measured values of the voltages and of the currents, for many levels of supply voltages, including those

that produce a strong saturation of the ferromagnetic core. The method was implemented in a MATLAB

program that allows computing the total losses, but also their components (i.e. eddy current losses and

hysteresis losses). The program was validated by analyzing a single-phase low voltage transformer with

wound core. The results offered by our program proved to be in accordance to the electromagnetic

devices’ theory and to some previous results published in the literature.

Paper 41: Comparative study of induction machine parameters behavior at variable load and speed

Ioan Ducar Transilvania University, Romania

Corneliu Marinescu Transilvania University, Romania

Nowadays electric machines drives are used more often at variable speed. This paper presents a

comparative study of induction machine parameters for different operating modes at variable speed and

variable load in order to determine the losses and the efficiency.






26

Paper 67: Influence of frequency on the performance of integrated electric drive systems

Ion Voncila. University “Dunarea de Jos” of Galati, Romania

Razvan Buhosu. University “Dunarea de Jos” of Galati, Romania

Madalin Costin. University “Dunarea de Jos” of Galati, Romania

Based on the algorithm design of brushless synchronous motors (brushless DC), this paper presents the

influence of input quantities frequency of the electrical gateway (voltage, current) - for constant values

obtained from the gateway machine (speed, torque) – on the geometric dimensions, parameters and

functional stability of this category of electric drives. The analysis used the Matlab programming

environment to design and visualize modes of frequency quantity variation (geometric size, operation

parameters, other characteristic values). The stated purpose of the paper is to show that, in modern

adjustable drive systems, it is necessary to create harmony between sub-components, and between the

frequency of control sizes (supplied by static converter) and the natural frequency of mechanical

structures (in particular, the electromechanical converter).

Paper 76: Permanent Magnet Synchronous Motor Optimization Design for Electric Drives

Ion Dobrota. University “Dunarea de Jos” of Galati, Romania

Madalin Costin. University “Dunarea de Jos” of Galati, Romania

Ion Voncila. University “Dunarea de Jos” of Galati, Romania

Grigore Fetecau. University “Dunarea de Jos” of Galati, Romania

In this paper has been designed an optimal permanent magnet synchronous motor (PMSM) by using a

coupled procedure composed by electric circuit equivalent scheme and finite elements method. The

optimal solution is based on a minimization of specific cost of active materials by genetic algorithms. For

this approach was taken into consideration different restrictions according to electromagnetic stress limits.

The final solution is checked by running the operation characteristics.

Paper 80: Electromagnetic torque capabilities of axial and radial flux permanent magnet machines

Adrian Augustin Pop Technical University of Cluj Napoca, Romania

Horia Balan Technical University of Cluj Napoca, Romania

Mircea Radulescu Technical University of Cluj Napoca, Romania

Hristiyan Kanchev Technical University of Sofia, Bulgaria

This paper aims to evaluate capabilities of axial flux and radial flux permanent magnet machines. The

comparison is done exclusively from an electromagnetic point of view. The design comparison of

conventional radial flux and axial flux topologies is made for traction drive applications.

S9 Power Electronics Scientific Session

Chairpersons: Vladimir Berzan, Alexandru Bitoleanu

Co-Chairpersons: Mihaela Popescu

Paper 37: Six-Phase Multi-Converter Drive with Specialized Schemes of Space-Vector PWM

Vladimir Berzan Institute of Power Engineering of the Academy of Sciences, Moldova

Valentin Oleschuk Institute of Power Engineering of the Academy of Sciences, Moldova

Alexandr Sizov Institute of Power Engineering of the Academy of Sciences, Moldova

This paper presents results of dissemination of specific schemes of synchronized pulsewidth

modulation (PWM) for adjustment of four neutral-point-clamped (NPC) inverters of dual three-phase






27

system. Specifically, this drive includes open-end windings induction motor with two sets of windings

spatially shifted by 30 el. degrees. Schemes and techniques of synchronized PWM allow continuous

phase voltage symmetry for any operating conditions. Spectra of the phase voltage of multi-converter

drive system with synchronized PWM do not contain even harmonics and sub-harmonics during the

whole control diapason.

Paper 54: Control of the Power in Induction Heating Systems with L-LC Resonant Voltage Source

Inverters

Mihaela Popescu University of Craiova, Romania

Alexandru Bitoleanu University of Craiova, Romania

Vlad Suru University of Craiova, Romania

This paper is a synthesis of the control circuit in an induction heating system with three-phase fully-

controlled rectifier, single-phase voltage source inverter and L-LC resonant load. The attention is mainly

directed on the control of the power transmitted to the induction coil. It is highlighted that the analytical

design of a proportional integral derivative or proportional integral controller is practically impossible

when the direct control of the current through inductor is desired. The two possibilities of power control

taken into consideration are the inverter output current control and the inverter input voltage control. The

design of the current and voltage controllers of proportional integral derivative type was carried out

successfully based on Modulus Optimum criterion in Kessler variant. The performances of the control

system in both variants of the power control were tested and validated by simulation under the Matlab-

Simulink environment by using real parameters of induction coils and heated pipes from a leading

Romanian manufacturer.

Paper 73: The Envelope Following Analysis of a Buck Converter with Closed Loop Control

Alexandru Gabriel Gheorghe University “Politehnica” of Bucharest, Romania

Florin Constantinescu University “Politehnica” of Bucharest, Romania

Mihai Eugen Marin University “Politehnica” of Bucharest, Romania

Miruna Nitescu University “Politehnica” of Bucharest, Romania

An envelope following algorithm using both the quadratic and the exponential approximations of the

envelope has been used for the simulation of a DC-DC converter with closed loop control. This

simulation proved to be more efficient than that performed with the envelope following algorithm

implemented in SPECTRE RF. This result seems to be obtained due to the most efficient implementation

of the quadratic approximation of the envelope used in the proposed algorithm.

Paper 96: Energetic Performances of Induction Heating Systems with Voltage Resonant Inverter

Constantin Vlad Suru University of Craiova, Romania

Mihaela Popescu University of Craiova, Romania

Alexandru Bitoleanu University of Craiova, Romania

This paper analyses the energetic performances of an induction heating system for a pipe rolling

machine, based on a single-phase resonant voltage inverter. Because this study constructed starting from a

real system experimental measurements, continuing on the equivalent Simulink model virtual

measurements, the simulation study was performed based on the measured experimental conditions. At

the same time, the system structure was adopted for a given inductor corresponding to the rolling plant,

and for a set of typical pipes parameters. For each pipe, the compensating capacitor value was chosen

according to the working frequency corresponding to the thickness of the processed pipe, the resonance

frequency of the reactive circuit being equal to the working frequency. The aim of the paper was the






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performance analysis of the system as well as the power quality analysis at the grid side and at the load

side of the system. The obtained simulation results compared to the corresponding results of the induction

heating system based on the current inverter proved the better performance of the voltage inverter based

induction heating system.

Paper 42: On the Use of a Low Voltage Power Factor Controller in Deforming Regime

Gabriel Nicolae Popa Politehnica University Timisoara, Romania

Costel Paliciuc Politehnica University Timisoara, Romania

Corina Maria Dinis Politehnica University Timisoara, Romania

The paper presents the analysis of a power factor with capacitors banks, without and with series coils,

used for improving power factor for an inductive load. These capacitors banks cause deforming regime

growth by this current harmonics. In order to diminish deforming regime through proper sizing, it can use

a mix of passive LC filter and power factor improvement.

Paper 85: Optimal VAR Compensation with DG Penetration Using an Enhanced Gravitational Search

Algorithm

Mihai Gavrilas Technical University of Iasi, Romania

Iulia Coroama Technical University of Iasi, Romania

The paper presents an original approach to the VAR compensation problem in distribution networks

with Dispersed Generation (DG) penetration, based on an enhanced form of the Gravitational Search

Algorithm (GSA). The enhanced GSA proposed in this paper is based on three concepts: elitism, hyper-

mutations and a new exploration strategy called Dynamic Supervision (DS). The performances of the

proposed method were assessed twofold: on a set of benchmark functions similar to those used by the

standard GSA and on a test distribution system with radial, tree-like structure, and DG sources. The

results of the proposed method were compared to those produced by a standard GSA for the first test

function, and to those generated by an alternative metaheuristic approached in a previous work of the

authors.

S10 Control Engineering Scientific Session

Chairpersons: Marian Barbu

Co-Chairpersons: Razvan Solea

Paper 22: Optimization of a Square-Root Nyquist Filter with Staircase Frequency Characteristic

Alexandru Nicolae Dumitru “Gh. Asachi” Technical University of Iaşi, Romania

Balan Alexandra Ligia “Ştefan cel Mare” University of Suceava, Romania

In this paper, we optimize a square-root Nyquist pulse with an asymptotic decay rate of t^(-1)

produced by an Nyquist filter with a staircase frequency characteristic. The performance of new inter-

symbol interference free pulses and the squared root filter are studied with respect to the ISI error

probability, in the presence of a timing error. To illustrate the achieved improvement, the new family of

pulses is compared with some recently proposed pulses. Both the staircase Nyquist pulse and the one

produced by the square root filter have a closed form expression in time domain and outperform most

previously reported pulses in several cases of commonly considered benchmark tests.






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Paper 29: Sliding mode control for a dynamic system, helicopter type

Codres Bogdan University “Dunarea de Jos” of Galati, Romania

Puscasu Ghiorghe University “Dunarea de Jos” of Galati, Romania

Murariu Gabriel University “Dunarea de Jos” of Galati, Romania

Codres Alexandru University “Dunarea de Jos” of Galati, Romania

Stancu Alexandru University “Dunarea de Jos” of Galati, Romania

This paper presents a sliding mode control structure designed for a dynamic system, helicopter type.

The approach is robust to model uncertainties and disturbances. The proposed control algorithm is

validated on a laboratory stand which uses pitch force to stabilize a helicopter.

Paper 71: Statistical and dynamical models on the Prut River state parameters. Monitoring area -

Galati, Romania case study

Gabriel Murariu University “Dunarea de Jos” of Galati, Romania

Mihaela Timofti University “Dunarea de Jos” of Galati, Romania

Paula Popa University “Dunarea de Jos” of Galati, Romania

Lucian Georgescu University “Dunarea de Jos” of Galati, Romania

Marian Barbu University “Dunarea de Jos” of Galati, Romania

Mathematical analysis. In this spirit, was made a systematic analysis of the recorded data on the Prut

River over a period of about 4 years. The paper begins with a brief description of the natural habitat and

positions that have made experimental determinations. The next sections present the obtained results,

especially basing on the statistical analysis of these measurements. The statistical analysis was performed

in two stages: a global analysis and a seasonal analysis. In the last section, are presented the results basing

on numerical analysis applied on the dynamics of the principal state parameters. Future research that will

be conducted for a deeper analysis of aquatic systems of this type.

Paper 72: Complementary models on the Danube River state parameters measured in the Galati area

Gabriel Murariu University “Dunarea de Jos” of Galati, Romania

Mihaela Timofti University “Dunarea de Jos” of Galati, Romania

Paula Popa University “Dunarea de Jos” of Galati, Romania

Lucian Georgescu University “Dunarea de Jos” of Galati, Romania

Bogdan Codres University “Dunarea de Jos” of Galati, Romania

Gheorghe Puscasu University “Dunarea de Jos” of Galati, Romania

This paper presents a research of temporal variability for water state parameters of the most important

river system from Romania and Europe - the Danube River. This water quality study was conducted near

Galati, on the left bank of the Danube River during nine years. Using different statistical methods was

made a statistical analysis in order to highlight the correlation relationship between the state parameters.

In the last section is studied a dynamical system modeling in order to recover the previous analysis'

results. Future research will be conducted for a deeper analysis of aquatic systems of this type.

Paper 75: Discrete modeling based control of a processing/reprocessing mechatronics line served by an

autonomous robotic system

Adriana Filipescu University “Dunarea de Jos” of Galati, Romania

George Petrea University “Dunarea de Jos” of Galati, Romania

Adrian Filipescu University “Dunarea de Jos” of Galati, Romania

Eugenia Minca "Valahia" University of Targoviste, Romania

Silviu Filipescu University “Dunarea de Jos” of Galati, Romania






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In this paper it is approached the problem of random events appearing in an automated

processing/reprocessing line. The purpose is to give a model of the processing/reprocessing line and to

introduce in the process a wheeled mobile robot (WMR) equipped with a robotic manipulator (RM).

Reprocessing starts after the processing and after the processed piece fails the quality test. Reprocessing

is needed to bring the piece to the parameters required. The WMR with RM is used to transport the piece

for reprocessing. For the development of these models, Petri Nets will be used. These models should be

coherent with real time evolution of the process. Considering these conditions, solving the main problems

concerning the processing line an operation is achieved with the help of a robot capable of both

transporting and manipulation tasks.

Paper 84: Format mediation for matching patient records in a three-layer information architecture

Simona-Roxana Dumitrescu University “Politehnica” of Bucharest, Romania

Ioana Branescu-Raspop University “Politehnica” of Bucharest, Romania


Many problems are encountered when information is combined from multiple databases. The major

concern is the mismatch encountered in representing and structuring the information. Matching these data

together is problematic because even small errors, such as data entry errors, different text format, and

missing data can prevent the exact-match. Using this information in an intelligent and active manner

requires a software module with a mediation role between the user level applications and the databases.

The main features of the mediation level are to simplify, abstract, reduce, merge, and explain data. This

paper describes a three mediation architecture that can be applied in the health-care institution. Our focus

will be on the mediation component, also known as the mediator. One of the most important features of

the mediator is the conflict resolution for which we propose the algorithm Jaro-Winkler, a powerful

method for comparing the similarities of short strings.

SS2 High-Efficiency Power Conversion Systems Scientific Session

Chairpersons: Marian Gaiceanu

Co-Chairpersons: Gelu Gurguiatu

Paper 5: Sliding Mode Controller for Induction Motor




This paper presents a new sliding surface used for induction motor control based on the sliding mode

approach. The controller is developed in the dq co-ordinates. The effectiveness of the proposed control

scheme is verified by numerical simulation. The main advantages of using SMC include fast response,

good transient and robustness with respect to system uncertainties and external disturbances. The

numerical validation results of the proposed scheme have presented good performances.

Paper 8: Regenerative DC Drive System


The energy during braking, for the single motor or multimotor (with common DC bus) DC drive

systems, can be regenerated into the AC power line or can be used by the other drive systems. The

proposed regenerative DC drive system consists of a series active power rectifier and a four quadrants

http://www.aciee.ugal.ro/






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DC-DC power converter connected to the DC machine. The quality of the regenerated energy is an

important issue. The control of the voltage source converter is based on the minor current loop in a

synchronous rotating-frame with a feedforward load current component added at the reference, completed

with the dc voltage control loop in a cascaded manner. Using the synchronous rotating frame, the active

and reactive power can be controlled independently by proportional-integral (PI) current controllers that

ensures zero-steady state error. The cascaded regulated loops (current and speed) have been involved in

the load side. By applying the power balance control the regenerative drive system provides sinusoidal

input current, unity power factor, bi-directional power flow, small (up to 5%) ripple in the dc-link voltage

in any operated conditions, disturbance compensation capability, and fast control response. The

performances of the regenerative drive system (in motoring and regenerating operation modes) have been

shown through the simulation results.

Paper 9: Vector-Controlled Optimal Drive System for the Induction Motor


Emil Rosu University “Dunarea de Jos” of Galati, Romania

Romeo Paduraru University “Dunarea de Jos” of Galati, Romania

Traian Munteanu University “Dunarea de Jos” of Galati, Romania

The motor drives are the major consumers of the electrical energy. There are two main ways for

energy saving: to use the advanced techniques of the optimal control and to adapt a solution to the

existing drive systems in order to increase the energy efficiency. In order to find an answer to this

challenge, in this paper a very cheap and efficient solution is proposed. The proposed electrical drive

system is obtained in two steps: firstly, the optimal control based on the energetic criteria is used in order

to obtain the optimal speed response; secondly, the optimal speed response is used as reference to the

existing conventional drive system. The obtained efficient electric drive system combines the energetic

performances of the optimal control with the features of the conventional drive control, the solution being

applicable to the industrial drive systems. The optimal control solution is based on the integration of the

matrix Riccati differential equation (MRDE) and it is computed on-line. The optimal control has three

components: the state feedback, the forcing component to achieve the desired state and the compensating

feed forward of the perturbation. It is tested by using numerical simulations on the specific cycle of an

elevator drive system and implemented to an industrial drive system.

Paper 10: Second Order Load Torque Estimator of the Vector-Controlled Synchronous Drive

Cristinel Radu Dache University “Dunarea de Jos” of Galati, Romania





Buhosu Razvan University “Dunarea de Jos” of Galati, Romania

The objective of the paper is to estimate the load torque of the vector controlled synchronous drive.

The proposed method supposes no additional hardware equipment. In order to estimate the load torque

the values of the transversal stator current component and of the speed signal are necessary. These signals

are available to any vector controlled synchronous drive system. Moreover, the proposed load torque

estimator is integrated into an optimal control drive system. In order to increase the robustness to noises

signal, in spite of using the first order load torque estimator the second order load torque estimator has

been proposed.






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Paper 11: Field Weakening Optimal Control of DC Motor Drive Systems

Romeo Paduraru University “Dunarea de Jos” of Galati, Romania

Traian Munteanu University “Dunarea de Jos” of Galati, Romania

Cristinel Dache University “Dunarea de Jos” of Galati, Romania



Teodor Dumitriu University “Dunarea de Jos” of Galati, Romania

The growing effort towards energy sustainability involves almost all aspects of our activity, from

energy production to delivery and use. Energy saving is a part of this effort, that helps conserving

resources, limits the demand for new power plants and decreases the environmental impact. Electrical

drives systems are among the major consumers, counting for two thirds of industrial electrical energy

consumption. In steady state and full load the electrical drives efficiency can be over 90%, but the motor

losses dramatically increases in dynamically regime. Linear dynamical system optimization has led to

new control structures synthesis for the electromechanical conversion systems that addresses the

efficiency problem. In this paper, an optimal control solution for nonlinear dynamical system,

particularized for the SEDCM (Separated Excited DC Machine) operated in field weakening regime, is

presented. The electromechanical system is highly nonlinear in this condition. The approached method is

the SISO (single-input single-output) feedback linearization and the application of linear optimal control

technique. The proposed solution is tested and experimental results are presented.

Paper 12: Energy savings generated by installing active power filters in water pumping stations

Gelu Gurguiatu University “Dunarea de Jos” of Galati, Romania

Ciprian Balanuta University “Dunarea de Jos” of Galati, Romania

Toader Munteanu University “Dunarea de Jos” of Galati, Romania


In this paper it is presented how an active power filter can generate energy savings in a water pumping

station. It is very well known that it was made a very important modernizations in terms of energy

savings by using variable speed. The pumps are controlled by power converters which become a

nonlinear load for the grid. In those conditions the problems of power factor cannot be managed with

simple capacitor banks. An evaluation of the solutions, which seems to be the active power filter, is made

in this paper by presenting the entire solution with the corresponding control technique and the energy

savings realized.

S11 Communications Scientific Session

Chairpersons: Tudor Palade

Co-Chairpersons: Ioan Susnea

Paper 52: Performance Analysis of Mobility in 3G Cellular UMTS and WLAN Networks

Andra Elena Iulia Pastrav Technical University of Cluj-Napoca, Romania

Anca-Ioana Grapa Technical University of Cluj-Napoca, Romania

Tudor Palade Technical University of Cluj-Napoca, Romania

Emanuel Puschita Technical University of Cluj-Napoca, Romania

Mobility regarded from Quality of Service (QoS) point of view can be provided by future wireless

access technologies with an efficient management of the handover process. The aim of this work is to

present a comparative analysis of handover mechanisms in 3G access technology UMTS, Wireless LAN






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802.11-g, as well as in proposed hybrid integrated architecture UMTS-WLAN, in terms of QoS

parameters: delay, jitter, throughput and packet loss. The obtained results should be useful considering

that future unified architectures aim at integrating different types of access architectures for overall better

performance.

Paper 55: Emergency Communication System for Fault Diagnosis in Power Distribution Networks

Ioan Susnea University “Dunarea de Jos” of Galati, Romania

Grigore Vasiliu University “Dunarea de Jos” of Galati, Romania

This paper describes a preliminary research aimed to explore the feasibility of the idea of creating an

alternative, backup communication system for fault diagnosis in power distribution networks, based on

the WSN technology. According to this study, it appears that a plurality of WSN nodes, spatially

distributed in a chain topology, and equipped with specially designed communication protocols may route

relatively small amounts of data over extended distances. Such a system is, in principle, capable to

provide the means for remote fault diagnosis operations in power distribution networks, in circumstances

when other communication systems are unavailable.

Paper 69: Influence of Trellis Termination Methods on Turbo Code Performances

Mihaela Andrei University “Dunarea de Jos” of Galati, Romania

Lucian Trifina "Gheorghe Asachi" Technical University of Iasi, Romania

Daniela Tarniceriu "Gheorghe Asachi" Technical University of Iasi, Romania

Increasing the performances of turbo codes used in communication systems is an important issue at the

moment. The method used for trellis termination influences the code performances. This paper describes

and compares (in terms of bit error rate – BER and frame error rate - FER) four types of these methods:

without trellis termination, termination only of the first trellis, post-interleaver flushing and dual

termination. Turbo code performances are evaluated for two lengths of S-random interleaver, using binary

phase-shift keying (BPSK) modulation, over Additive White Gaussian Noise (AWGN) channel. The

simulations were performed for two generating matrices of the component encoders and the decoding

algorithm we have used is a version of Max-Log-MAP.

Paper 70: Towards Multi- port Modbus Gateway

Claudiu Chiculita University “Dunarea de Jos” of Galati, Romania

Liviu Ene University “Dunarea de Jos” of Galati, Romania

Mihai Cristea University “Dunarea de Jos” of Galati, Romania

Integration of various equipments into a distributed automation project becomes a necessity for

building large automation systems and rises problems of networking of heterogeneous nodes in a complex

communication network. In this paper, we investigate the interconnection problems of nodes into an

industrial network using Modbus protocol, and propose solutions to address the problems optimally

Paper 83: Full redundant transmission of multicast stream via unicast network

Tarabuta Radu-Cezar University "Stefan Cel Mare" Suceava, Romania

Potoroac Alin University "Stefan Cel Mare" Suceava, Romania

Balan Doru University "Stefan Cel Mare" Suceava, Romania

The paper is describing a data distribution solution to be used for efficient multicast streaming via

unicast networks. An experiment was conducted in order to send a multicast video streaming over

multiple paths simultaneously using internet network infrastructure followed by recomposing the initial

information at the destination.

“dunarea de jos” university of galati -...

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