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Recurso libre

WDM in Courses of Communication Technologies
Filka, Miloslav - Bernkopf, Miroslav

Formato:	,
Enlaces:	This conference paper shows and demonstrates how modern technologies (such as WDM – Wavelength Division Multiplex) were introduced to students of Optical Networks lectured at Brno University of Technology, Faculty of Electrical Engineering and Communication, Dept. of Telecommunications.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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Diagnostics and Reconfiguration of Control Systems
Krokavec, Dusan - Filasova, Anna

Formato:	,
Enlaces:	This contribution summarizes some of the major trends, as well as real opportunities for the application of system fault diagnosis and reconfiguration control structures in automatic control systems. There are referenced ongoing concepts for residual generation, described design approaches in virtual reconfiguration…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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Mathematical Model of Thyristor Inverter Including a Series-parallel Resonant Circuit
Luft, Miroslaw; Technical University of Radom - Szychta, Elzbieta

Formato:	,
Enlaces:	The article presents a mathematical model of thyristor inverter including a series-parallel resonant circuit with theaid of state variable method. Maple procedures are used to compute current and voltage waveforms in the inverter.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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High-Freqeuncy Analysis of Three-Winding Autotransformers 400/121/34 kV
Gutten, Miroslav - Brandt, Martin - Polansky, Roman - Prosr, Pavel

Formato:	,
Enlaces:	This article deals with a description of methods of an experimental analysis concerning the actual condition of windings and magnetic circuit of the autotransformer, which is required in power transmission companies all over the world.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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Analysis of PMMT Operation for Renewable (PV/FC) Energy Source
Sul, Robert - Fibich, Peter - Frivaldsky, Michal

Formato:	,
Enlaces:	Utilization and construction of renewable energy sources require complexity of whole system. It is considered touse a set of devices that are necessary for energy conversion, accumulation, preparation and its distribution into electrical power supply network. The way of realization…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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Using of the Modern Semiconductor Devices Based on the SiC
Drabek, Pavel

Formato:	,
Enlaces:	This paper deals with possibility of application of the semiconductor devices based on the SiC (Silicon Carbide) inthe power electronics. Basic synopsis of SiC based materials problems are presented, appreciation of their properties incomparison with current using power semiconductor devices…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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The Assessment of Working Conditions of Traction Substation for Power and Reactive Energy
Wojciechowski, Jerzy - Lukasik, Zbigniew

Formato:	,
Enlaces:	In this paper, problems concerning the management of reactive power of DC traction substation have been discussed. The structure of traction system and its main elements has been sketched. Reactive power issue with respect to rectifier sets has been presented.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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Quality of Power Supply in European View
Prokop, Lukas - Hradilek, Zdenek

Formato:	,
Enlaces:	This paper deals with comparisons of situation in quality of power supply regulation in some of European countries, which are interested in CEER (Council of European Energy Regulators). Especially we focused our analysis on reliability indices, relationship between supplier and…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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Estimates of Quantities in a Hall Effect Geodynamo Theory
de Paor, Annraoi M; NUI Dublin

Formato:	,
Enlaces:	Currents, resistances, dynamo constant, Hall voltage coefficient and inductances are estimated for the author’s geodynamo theory incorporating the Hall Effect. It is concluded that the Hall Coefficient in the bulk liquid core of the Earth is approximately 1.512x10-1, orders of…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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10.

Estimation of Energy Not Supply
Medvec, Zdenek - Prokop, Lukas

Formato:	,
Enlaces:	Damages in industrial company are raising during electrical interruption of power supply. These damages have usually different character and financial damages are most usual. Value of damage is nearly pertinent to type of industrial branch and working load of production…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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11.

Analysis of Setups of the Control of Rail Microprocessor Systems
Kornaszewski, Mieczyslaw - Lukasik, Zbigniew

Formato:	,
Enlaces:	In the article will have been introduced possibilities following from the application of the microprocessor technology in rail systems of the control of traffic will remain for example of modern signalling on railway crossings. Introduction to microcomputer and microprocessor systems…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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12.

Numerical Solution of Magnetostatic Field of Maglev System
Sobotka, Jaroslav

Formato:	,
Enlaces:	The paper deals with the design of the levitation and guidance system of the levitation train Transrapid 08 by means of QuickField 5.0 – a 2D program formagnetic electromagnetic fields solutions.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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13.

Calculation of Forces Acting on Bars of Induction Machina
Hruska, Karel

Formato:	,
Enlaces:	This calculation is based on calculation of torque components of induction machines. Basic torque components are expanded, using knowledge of machine’s geometry, to the periphery of machine’s rotor. Using Fourier analysis of torque components it is possible to calculate forces…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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14.

Principles of Audio Watermarking
Hrncar, Martin - Krajcovic, Jan

Formato:	,
Enlaces:	The article contains a brief overview of modern methods for embedding additional data in audio signals. It could have many reasons - for the purposes of access control or identification related to particular type of audio. This secret information is…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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15.

Triple Play Service and IPTV Services Offered within it
Pajdusakova, Dagmar - Adamec, Bohumil

Formato:	,
Enlaces:	This paper deals with Triple Play multimedia service and figures its architecture. Triple Play offers voice, video and data services together in one customer connection. There is offered IPTV (Internet Protocol Television) service within this service, where we can include…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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16.

Influence of Electric Discharges on Bearings of Electric Machina
Foldyna, Jiri - Chmelik, Karel - Misak, Stanislav

Formato:	,
Enlaces:	Bearing currents are one of cause’s bearings faults. The character of a lubricator belongs to main factor influencing an inception of bearing currents. We have analyzed the electric character variety kind of lubricators; the influence of lubricators on a bearing…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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17.

Overview of Distributed Control Systems Formalisms
Holecko, Peter

Formato:	,
Enlaces:	This paper discusses a chosen set of mainly object-oriented formal and semiformal methods, methodics, environments and tools for specification, analysis, modeling, simulation, verification, development and synthesis of distributed control systems (DCS).
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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18.

The Parametric Model for PLC Reference Chanells and its Verification in Real PLC Environment
Roka, Rastislav

Formato:	,
Enlaces:	For the expansion of PLC systems, it is necesssary to have a detailed knowledge of the PLC transmission channel properties. This contribution shortly discusses characteristics of the PLC environment and a classification of PLC transmission channels. A main part is…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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19.

Formation of Signals Harmonized with the Channel of Connection with Different Quality Criteria
Cherneva, Galina Petkova - Andonov, Antonio

Formato:	,
Enlaces:	The paper presents the optimization of the transmitted signal form according to a number of quality energy criteria. It is the transmission efficiency that has been assessed for signals harmonized with the channel of connection in comparison to the common-used…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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20.

Methods of Risk Analysis of Telematic Objects
Stefanak, Jozef - Pribyl, Pavel - Spalek, Juraj

Formato:	,
Enlaces:	The paper focuses on basic description of the tunnel as a telematic object and its architecture. Conventional methods of risk analysis of telematic objects are introduced in relation to their safety. New approaches of risk quantification are shown in connection…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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21.

The Magnetic Fields of Electric Motors and their EMC
Kovac, Dobroslav - Kovacova, Irena

Formato:	,
Enlaces:	This paper deals with the computer analysis of the electromagnetic compatibility (EMC) problems focused on the area of electrical machines, which can also disclose the concerning startling facts. A problem of interference between electric motor and surrounding space caused by…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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22.

Some Thoughts on Electrical Interventions for the Control of Tremor in Parkinson's Dinase
Hearn, A. N.; NUI Dublin - Lowery, Madeleine; NUI Dublin - de Paor, Annraoi M; NUI Dublin

Formato:	,
Enlaces:	Ideas from control theory – state variable feedback, dither injection, the equivalent nonlinearity and the describing function-are applied to models developed to help understand the mechanisms of electrical interventions such as deep brain stimulation (DBS) for the alleviation of Parkinsonian…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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23.

Traction Transformer 1 MV.A, Superconducting, Oil-immersed and Medium Frequency
Krasl, Milan - Pechanek, Roman - Vlk, Rostislav

Formato:	,
Enlaces:	This paper deals with comparing 3 types of transformers - superconducting, oil-immersed and middle-frequency. These transformers can be used for locomotive as the main transformer. Weight, sizes and losses are introduced. The influence of eddy currents is describes by middle-frequency…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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24.

Sliding Mode Flux Observer of Induction Motor
Sutnar, Zdenek - Rodic, Miran - Peroutka, Zdenek

Formato:	,
Enlaces:	This paper deals with the sliding mode theory for direct torque and flux controlled (DTFC) induction motor drive. The aim of this paper is implementation of sliding mode theory for design of robust sensorless control of the drive with DTFC.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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25.

Mathematical Models of MIMO Channel
Poloha, Peter - Wieser, Vladimir - Haring, Jan - Majer, Norbert

Formato:	,
Enlaces:	In this contribution, we try to resolve the problem with multipath MIMO channel in wireless environment. To understand the environment, where multipath signal is transported, theoretical models will be applied. We will take a look on theoretical models and results…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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26.

Directional Pattern Analysis of a Linear Phased Antenna
Haring, Jan - Majer, Norbert - Hronec, Rudolf

Formato:	,
Enlaces:	An antenna array is a system compound from simply radiators (dipoles, microstrip antennas), that together form desired radiation pattern. Phased array antennas consist of multiple stationary antenna elements, that are fed coherently and use variable phase or time-delay control at…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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27.

Future of Electrotechnics: Ferrofluids
Mayer, Daniel

Formato:	,
Enlaces:	Magnetic liquids enabled development of new devices and technologies that are a useful alternative to theexisting ones. Many of these applications are still in progress and do not represent any break-through discoveries yet.Nevertheless one may expect that owing to their…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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28.

Analysis of Simulated Reflection Characteristics of Uniform and Apodized Fiber Bragg Gratings
Gemzicky, Erik - Mullerova, Jarmila

Formato:	,
Enlaces:	In this paper, the simulations of the reflectance of the uniform and apodized fiber Bragg gratings (FBG) are presented. The simulations are based on the coupled–mode theory. The simulated reflectances of FBGs with different lengths and the modulations of the…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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29.

, Full-Optical Logical Gates for Optical Signal Processing
Markovic, Miroslav - Dubovan, Josef - Dado, Milan

Formato:	,
Enlaces:	, This paper is dedicated to full-optical logical NOT, AND and NAND gates. In the first section are described logical functions based on Mach-Zehnder interferometric structure. The second part deals with full-optical logical gate AND, that utilizes TOAD structure. The…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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30.

Accumulation Systems of Electric Energy Solved by Multicriteria Analysis Methods IPA and Topsis
Hradilek, Zdenek - Sebesta, Robert

Formato:	,
Enlaces:	This work deals with utilization of multicriteria analysis methods IPA and TOPSIS to assess three storage systems (Fuel Cells, Lead Acid Batteries and Pumped Storage Hydro Plants). Procedures of IPA and TOPSIS methods are described here as like as calculation…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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31.

Economy of Renewable Resources of Energy Operation
Hradilek, Zdenek - Vyslouzil, Martin

Formato:	,
Enlaces:	Nowadays the renewable resources continue to be more important in the Czech Republic especially thanks to tendency reach of 8 % share of total production of electricity power which the Czech Republic sing on the European Union. This article contains…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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32.

Partial Discharge Measurement in Operation: Problems with Disturbances and their Removing
Beranova, Lenka - Zalis, Karel

Formato:	,
Enlaces:	Diagnostics by partial discharge measurement is a modern diagnostic method for determination of the state of insulating systems of high voltage machines and equipment. In the High Voltage Laboratory of the Czech Technical University in Prague was developed the complex…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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33.

Commutation Processes in Multiresonant ZVS Bridge Converter
Luft, Miroslaw; Technical University of Radom - Szychta, Elzbieta

Formato:	,
Enlaces:	The analysis of the multiresonant ZVS DC/DC bridge converter is presented. The control system of the converter is basedon the method of frequency control at the constant time of transistor turn-off with a phase shift. The operation of the circuit…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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34.

New Configuration of Traction Converter with Medium-Frequency Transformer: Primary Part
Blahnik, Vojtech - Peroutka, Zdenek - Molnar, Jan - Michalik, Jan

Formato:	,
Enlaces:	This paper deals with new configuration of the traction converter with medium-frequency transformer intended for ac trolley wire fed locomotives. It is concerned to the primary serially connected single-phase voltage-source active rectifiers, which are directly connected to the trolley wire.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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35.

A Study of Appropriate Arrangement of Thermoelastic Actuator
Dolezal, Ivan - Donatova, Martina - Karban, Pavel - Ulrych, Bohus

Formato:	,
Enlaces:	The actuators working on the principle of thermoelasticity belong to novel elements of this kind that are characterized by very high forces acting at relatively low shifts of the dilatation element. The paper analyses their operation properties in the dependence…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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36.

The Simulation of the Traction Drive with Middle-Frequency Transformer
Drabek, Pavel - Pittermann, Martin - Cedl, Marek - Los, Miroslav

Formato:	,
Enlaces:	This paper presents research motivated by industrial demand for special traction drive topology devoted to minimization of traction transformer weight against topology with classical 50Hz traction transformer. The special traction drive topology for AC power systems consists of input high…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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37.

ZVZCS PWM DC-DC Converter with Energy Recovery Clamp
Durdik, Jaroslav - Ruscin, Vladimir

Formato:	,
Enlaces:	This paper presents research motivated by industrial demand for special traction drive topology devoted tominimization of traction transformer weight against topology with classical 50Hz traction transformer. The special tractiondrive topology for AC power systems consists of input high voltage trolley…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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38.

The Possibility to Constitute an Interoperability of EFC in the Central and Eastern Europe
Pribyl, Pavel - Spalek, Juraj

Formato:	,
Enlaces:	The article describes critical situation concerning implementation of the EFC satellite oriented system in CEEC countries. Situation in the field of practical implementation of GNSS/CN is very critical at present due to lack of valid European standards. There is only…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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39.

Reduction of Harmonics by 18-Pulse Rectifier
Kocman, Stanislav - Styskala, Vitezslav

Formato:	,
Enlaces:	Operation of such electrical devices as data processing and electronics devices, adjustable speed drives or uninterruptible power supply can cause problems by generating harmonic currents into the network, from which they are supplied. Effects of these harmonic currents are various,…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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40.

Design and Realization of Laser Diode Power Supply
Svarny, Jiri

Formato:	,
Enlaces:	Under the terms of development of specialized system for transmissions of analogue high frequency signals by means of optical fibres, the source of coherent infrared radiation has been designed and manufactured. The source has to excite Mach–Zehnder type external intensity…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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41.

Numerical Modelling of Electromagnetic Field in a Tornado
Fiala, Pavel; Brno University of Technology - Jirku, Tomas - Kriz, Tomas

Formato:	,
Enlaces:	This study deals with the numerical model of both the physical and the chemical processes in the tornado. Within the paper, a basic theoretical model and a numerical solution are presented. We prepared numerical models based on the combined finite…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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42.

Security of Information Flows in Transport, as an Important Item of Crisis Management within Transport Systems
Mikulski, Jerzy; Silesian University of Technology, Katowice - Dziula, Przemyslaw

Formato:	,
Enlaces:	The article describes main aspects concerning security of information exchanged within transport systems. Definition of critical infrastructure and main matters coming out of fact transport systems are included in there, have been specified. The paper is also showing possibilities and…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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43.

Numerical Modelling of the Special Light Source with Novel R-FEM Method
Fiala, Pavel; Brno University of Technology - Kroutilova, Eva; Brno University of Technology - Kriz, Tomas; Brno University of Technology

Formato:	,
Enlaces:	This paper presents information about new directions in the modelling of lighting systems, and an overview of methods for the modelling of lighting systems. The novel R-FEM method is described, which is a combination of the Radiosity method and the…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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44.

Experiments with the Effect of Non-Homogenous Parts into Materials
Fiala, Pavel; Brno University of Technology - Kroutilova, Eva; Brno University of Technology - Steinbauer, Miroslav; Brno University of Technology - Dohnal, Premysl; Brno University of Technology - Hadinec, Michal; Brno University of Technology - Bartusek, Karel; Institute of Scientific Instruments of the ASCR

Formato:	,
Enlaces:	The article describes possibility of the deformity magnetic field numerical modeling into surroundings of the measured dia – paramagnetic specimens. This deformation study is given for the purposes MR measuring, where MR images are deformed from the point of view…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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45.

Experiments with Accuracy of the Air Ion Field Measurement
Fiala, Pavel; Brno University of Technology - Steinbauer, Miroslav; Brno University of Technology - Bartusek, Karel; Institute of Scientific Instruments, Academy of Sciences of the Czech Republic - Szabo, Zoltan; Brno University of Technology

Formato:	,
Enlaces:	This article presents the capability of methods for measuring of the air ion concentration and principles of ion spectral analysis methods. The analysis of the electric state of air shows the presence of various ion sorts. The therapeutic effect of…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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46.

PROMETHEE Method and Sensitivity Analysis in the Software Application for the Support of Decision-Making
Moldrik, Petr - Gurecky, Jiri - Paszek, Leopold

Formato:	,
Enlaces:	PROMETHEE is one of methods, which fall into multi-criteria analysis (MCA). The MCA, as the name itself indicates, deals with the evaluation of particular variants according to several criteria. Developed software application (MCA8) for the support of multi-criteria decision-making was…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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47.

Risk Analysis of Safety-Critical Control Systems
Rastocny, Karol; University of Zilina

Formato:	,
Enlaces:	This paper deals with problems associated with risks analysis of a safety-critical control system. In the paper there are introduced recommendations enabling practical enforceability of risk analysis by the assurance of sufficient objectivity level. In the initial phases of the…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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48.

Determination of Criteria Weights in Terms of Computer Software
Paszek, Leopold - Gurecky, Jiri - Prokop, Lukas

Formato:	,
Enlaces:	This article takes down the knowledge with determination of criteria weights in the terms of computer software of superconductive materials. This software relieves processing of considerable enters data. The criteria of the weights were determinated by Fuller triangle and Saaty´s…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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49.

On Nanometer Ordering in thin Amorphous Hydrogenated Silicon
Mullerova, Jarmila - Vavrunkova, Veronika - Sutta, Pavol

Formato:	,
Enlaces:	We investigated thin films of amorphous hydrogenated silicon (a-Si:H) deposited by PECVD under increasingdilutions of silane plasma by hydrogen. We found out that under increasing additional hydrogen at the depositions, thin filmsobtain less hydrogen bonded to silicon. The optical band…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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50.

Common Protocol for Distributed Network File System
Peniak, Peter - Kallay, Fedor

Formato:	,
Enlaces:	Paper deals with common protocol for distributed network file system. Focus is on CIFS protocol from Microsoft, the enhanced version of Microsoft Server Message Block (SMB), that is proposed as possible common solution for file sharing among distributed systems. There…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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51.

Maintenance Optimization of High Voltage Substation Model
Bris, Radim - Gala, Jan

Formato:	,
Enlaces:	The real system from practice is selected for optimization purpose in this paper. We describe the real scheme of a high voltage (HV) substation in different work states. Model scheme of the HV substation 22 kV is demonstrated within the…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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52.

Integral Solution of 3D Electric Field of a Disconnector
Karban, Pavel; University of West Bohemia - Donatova, Martina; University of West Bohemia

Formato:	,
Enlaces:	The disconnectors belong to elements widely used in electrical power engineering and apparatus technology for disconnecting various electric circuits. Usually they work without voltage (the circuit is first switched off by a circuit breaker). Nevertheless, in a fault regime the…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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53.

On-board Unit and its Possibilities of Communications on Safety and Security Principles
Vaculik, Martin; University of Zilina - Franekova, Maria - Vestenicky, Peter - Vestenicky, Martin

Formato:	,
Enlaces:	The technical solution of on-board unit (OBU) for vehicles used for dangerous good transport and design of vehicle sensor network (based on CAN bus) for dangerous good monitoring will be discussed. In presentation the conception of GSM/GPRS networking subsystem for…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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54.

Analysis of Pulsed Electromagnetic Fields Radiated by Powerful Sources
Maceika, Kazimieras Vytautas

Formato:	,
Enlaces:	Calculation method proposed for powerful sources radiation evaluation. Taken attention that in calculations it is necessary to use average radiated power. For example in case of radars it depends on two facts: radar radiates short radio impulses with long pauses…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

55.

Trends in Control Area of PLC Reliability and Safety Parameters
Zdansky, Juraj - Hrbcek, Jozef - Zelenka, Jan

Formato:	,
Enlaces:	Extension of the PLC application possibilities is closely related to increase of reliability and safety parameters. If the requirement of reliability and safety parameters will be suitable, the PLC could by implemented to specific applications such the safety-related processes control.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

56.

Effective Deffect Identifications in Honeycombs
Dedkova, Jarmila; Brno University of Technology

Formato:	,
Enlaces:	The image reconstruction problem based on Electrical Impedance Tomography (EIT) is an ill-posed inverse problem of finding such conductivity distribution that minimizes some optimisation criterion, which can be given by a suitable primal objective function. This paper describes new algorithms…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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57.

Combination of Deterministic and Stochastic Aproaches to the Image Reconstruction
Dedkova, Jarmila; Brno University of Technology

Formato:	,
Enlaces:	In this paper is described a new algorithm based on the combination of deterministic and stochastic approaches to the reconstruction process of the surface conductivity distribution to obtain the best results. The images of the electrical surface conductivity distribution can…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

58.

Modelling of Safety Fieldbus System via SW Tool SHARPE
Rofar, Jan - Franekova, Maria

Formato:	,
Enlaces:	Paper deals with the modelling of the safety-related Fieldbus communication system, which has to guaranty Safety Integrity Level (SIL) according to standard IEC 61508. There are methods of safety analysis for the closed safety Fieldbus transmission system summarized. The mainly…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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59.

Improving the Method of the Calibration Multichannel Ultrasonic Flaw Detectors for Measurements with Angle Problems
Ciszewski, Tomasz - Lukasik, Zbigniew; Technical University of Radom

Formato:	,
Enlaces:	In the article an improved method of measurements synchronization which uses the cross correlation function and calibration patterns is presented. The previous version of the method turned out to be not precise enough if angle probes were used during the…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

60.

Ofstatistical and Fractal Properties of Semiconductor Surface Roughness
Jurecka, Stanislav - Jureckova, Maria - Kobayashi, Hikaru - Takahashi, Masao - Madani, Mohammad - Pincik, Emil

Formato:	,
Enlaces:	Surface morphology evolution is of primary significance for the thin-film growth and modification of surface andinterface states. Surface and interface states substantially influence the electrical and optical properties of the semiconductorstructure. Statistical and fractal properties of semiconductor rough surfaces were…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

61.

Effect of Measurement Conditions on Barkhausen Noise Parameters
Pala, Jozef; Slovak University of Technology in Bratislava - Bydzovsky, Jan; Slovak University of Technology in Bratislava

Formato:	,
Enlaces:	The Barkhausen noise was measured in plastically deformed low-carbon steel at various measurement conditions. Strip samples magnetized by a single yoke were used for investigation. The measurement results for different magnetizing frequencies, waveforms of the magnetizing field and cut-off frequencies…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

62.

Advances in Eddy-Current Non-Destructive Evaluation
Janousek, Ladislav; University of Zilina - Gombarska, Daniela; University of Zilina - Capova, Klara; University of Zilina

Formato:	,
Enlaces:	The paper presents a general overview of recent developments in the eddy-current non-destructive evaluation. Basic principle of the eddy-current non-destructive testing is explained and possible applications of the method in noninvasive evaluation of conductive materials are summarized. Actual issues of…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

63.

Recent Trends in Electromagnetic Non-Destructive Sensing
Capova, Klara; University of Zilina - Cap, Ivo; University of Zilina - Janousek, Ladislav; University of Zilina - Smetana, Milan; University of Zilina

Formato:	,
Enlaces:	The paper deals with material electromagnetic non-destructive testing (eNDT) with emphasize on eddy current testing (ECT). Various modifications of ECT sensing are compared and discussed from the desired detected signal characteristics point of view. Except of the optimization of usual…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

64.

Pulsed Excitation in Eddy Current Non-Destructive Testing of Conductive Materials
Smetana, Milan; University of Zilina - Strapacova, Tatiana; University of Zilina - Janousek, Ladislav; University of Zilina

Formato:	,
Enlaces:	The paper deals with eddy current non-destructive testing of conductive materials. Basic principle of the method is explained. Two types of eddy current excitation, the harmonic one and the pulsed one, are discussed. The characteristics, advantages as well as disadvantages…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

65.

Inspection of Conductive Prosthetic Replacements using Electromagnetic Methods of Non-Destructive Testing
Strapacova, Tatiana; University of Zilina - Smetana, Milan; University of Zilina - Capova, Klara; University of Zilina

Formato:	,
Enlaces:	This paper describes the use of electromagnetic methods of non-destructive testing for detecting of inhomogeneities presence in a prosthetic replacement with focus on strut fractures in prosthetic heart valves. In the first part of this paper there are described a…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

66.

Sputtered of ZnO:Al thin Films for Application in Photovoltaic Solar Cells
Flickyngerova, Sona - Rehakova, Anna - Tvarozek, Vladimir - Novotny, Ivan

Formato:	,
Enlaces:	High transparent and conductive, aluminium - doped zinc oxide thin films (ZnO:Al), were prepared by radio –frequency (RF) diode sputtering from ZnO+2 wt. % Al2O3 target on Eutal glass substrates. Surfaces of the samples weretreated by various technological steps during…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

67.

On the Damper Cage Bar´s Currents Calculation Forsalient Pole Large Synchronous Machina
Vicol, Liliana - Banyai, Attila - Viorel, Ioan-Adrian - Simond, Jean Jacques

Formato:	,
Enlaces:	The damper cage bars’ currents occur only when the synchronous machine operates in a dynamic regime and its rotor speed differs from the stator field speed. Basically there are two ways of calculating the damper cage currents, by using the…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

68.

Algorithm Design for Assignment Frequency Channels for Services in CATV Network
Hlubik, Jan

Formato:	,
Enlaces:	This article describes algorithm design for assignment frequency channels for services in CATV network. QAM modulated channels in designed system are dynamically switched and frequency adapted. On introduction, there is shortly described principle of providing analog video, digital video and…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

69.

Hidden Markov Models in Speech Recognition
Krajcovic, Jan - Hrncar, Martin - Muzikarova, Ludmila

Formato:	,
Enlaces:	Voice control is one of the perspective areas of interdisciplinary field called Human Machine Interface (HMI). By the voice control of machines, we usually deal with the recognition of commands from previously defined set. There are many different techniques of…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

70.

Simulation of Electrical Parameters for Ru/Ta2O5/SiO2/Si(p) High-k MOS Structure
Racko, Juraj - Harmatha, Ladislav - Breza, Juraj - Benko, Peter - Donoval, Daniel

Formato:	,
Enlaces:	The contribution presents the results of simulation of direct tunnelling of free charge carriers through a thin gateinsulator in MOS structures consisting of a Ta2O5/SiO2 bilayer taking into account also indirect tunnelling of free chargecarriers through the SiO2/Si interface traps.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

71.

The Resistance of Breakdown in Transformer Oil
Kudelcik, Jozef

Formato:	,
Enlaces:	The conditions under which breakdown of composite liquid - solid insulation can be occurred, e.g., in transformer,play an important role in designing of such insulation. The initial state of breakdown development is explained on the basisof bubble theory and formation…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

72.

Relaxing Oscillation of the Machine-Unit
Skala, Bohumil; University of West Bohemia in Plzen - Kindl, Vladimir

Formato:	,
Enlaces:	To understand the behavior of the Earth´s geomagnetic field, many theories have been created. One of the possible approaches is the Rikitake dynamo and chaotic theory. This paper describes the first step, i.e. how to verify the chaotic theory simulated…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

73.

Operating of Small Wind Power Plants with Induction Generators
Nevrala, Jakub - Misak, Stanislav

Formato:	,
Enlaces:	This paper describes different systems of small wind power plants with induction generators used in the Czech Republic. Problems of wind power plants running with induction generators are solved within partial target of the research project MSM 6198910007. For small…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

74.

Magnetic Spectra Analysis of Dielectrics
Slama, Jozef - Olah, Vladimir - Gruskova, Anna - Jancarik, Vladimir - Hudec, Ivan - Dosoudil, Rastislav - Siroky, Pavol - Soka, Martin

Formato:	,
Enlaces:	Method of magnetic spectroscopy is used to analyze and to interpret the experimental data obtained by magneticmeasurement of the complex permeability spectra of Mg ferrite and NiZn ferritepolymers. Ferritepolymers were preparedfrom various concentration of NiZn ferrite particles as a soft…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

75.

SD LMS L-Filters for Filtration of Gray Level Images in Timespatial Domain Based on GLCM Features
Hudec, Robert - Benco, Miroslav - Krajcovic, Janko

Formato:	,
Enlaces:	In this paper, the new kind of adaptive signal-dependent LMS L-filter for suppression of a mixed noise in greyscale images is developed. It is based on the texture parameter measurement as modification of spatial impulse detector structure. Moreover, the one…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

76.

New Mixer Used in Direct Frequency Synthesizer
Stork, Milan

Formato:	,
Enlaces:	Frequency synthesizers are an essential part of any modern transceiver system. They generate clock and oscillator signals needed for up and down conversion. Today’s communication standards demand both high frequency accuracy and fast frequency settling. The fine frequency resolution, low…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

77.

Electromechanical Model of Blood Flow in Vessels
Cap, Ivo; University of Zilina - Czippelova, Barbora; University of Zilina

Formato:	,
Enlaces:	The present paper deals with some theoretical derivations connected with very efficient method of solution of hydrodynamic problems of blood flow in human cardiovascular system. The electromechanical analogy of liquid flow in a tube and electromagnetic wave propagating along an…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

78.

New Nanocrystalline Materials for Power Electronics Applications
Usak, Elemir - Svec, Peter - Kuchta, Jozef - Bydzovsky, Jan

Formato:	,
Enlaces:	New nanocrystalline materials for the applications in the power electronics systems are developed and tested.These materials are intended to be used in the magnetic circuits of switching-mode power supplies (SMPS). The aim was toachieve extremely low hysteresis and non-linearity in…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

79.

Analytical Method of Malculation of the Current and Torque a Reluctance Stepper Motor via Fourier Series
Zaskalicky, Pavel - Zaskalicka, Maria

Formato:	,
Enlaces:	Reluctance stepper motors are becoming to be very attractive transducer to conversion of electric signal to the mechanical position. Due to its simple construction is reluctance machine considered a very reliable machine which not requiring any maintenance. Present paper proposes…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

80.

The Model of Communication Channel in the 802.11b Standard Wireless Network
Nemec, Zdenek - Dolecek, Radovan - Silar, Zdenek

Formato:	,
Enlaces:	The paper deals with software modelling of a communication channel in the 802.11b standard wireless network physical layer. A computer model of signal processing was created to verify possibility of the proposal of localisation system. Functionality of the signal generation…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

81.

The EEG Signal Prediction by Using Neural Network
Babusiak, Branko; VSB - Technical Unversity of Ostrava - Mohylova, Jitka; VSB - Technical Unversity of Ostrava

Formato:	,
Enlaces:	The neural network is computational model based on the features abstraction of biological neural systems. The neural networks have many ways of usage in technical field. They have been applied successfully to speech recognition, image analysis and adaptive control, in…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

82.

Optimalization of Beacon Selection for Localization in Wireless AD-HOC Networks
Matula, Martin - Duha, Jan

Formato:	,
Enlaces:	In this paper we engage in optimalization of convenient beacons for localization position of a node in the ad-hoc network. An algorithm designed by us localizes position of moving or static node by RSS (Received Signal Strength) method and trilateration.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

83.

Application of Neutral Network by EEG Signal Classification
Gala, Michal; VSB - Technical University of Ostrava - Mohylova, Jitka; VSB - Technical University of Ostrava - Krajca, Vladimir; VSB - Technical University of Ostrava

Formato:	,
Enlaces:	Analysis of long-term EEG requires that it is segmented into piece-wise stationary sections and classified. Neural network architecture is introduced for the problem of classification of EEG signals. This paper deals with basic signal classification into two classes. This work…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

84.

Electromagnetic Properties of Selected Hexaferrites
Gruskova, Anna - Slama, Jozef - Gonzalez, Alvaro - Durman, Vladimir - Usakova, Marianna - Jancarik, Vladimir - Soka, Maritn

Formato:	,
Enlaces:	Ba(Sr)(Me12+Me24+)xFe12-xO19 hexagonal ferrites preparation with substitution ratio of 0.0 x 0.6. The iron ionswere substituted by selected cation combinations (divalent Me12+= Ni, Zn, Sn, Co and tetravalent Me24+= Ti, Zr, Ru ions).The samples were synthesised by high energy milling and…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

85.

Measurement Evaluation of EMF Effect by Mobile Phone on Human Head Phantom
Psenakova, Zuzana; University of Zilina - Benova, Mariana; University of Zilina

Formato:	,
Enlaces:	Interaction of electromagnetic field (EMF) with environment and with tissue of human beings is still under discussion and many research teams are investigating it. One of electromagnetic devices is mobile phone. There are many simulations and measurements on models or…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

86.

Temperature Dependence of Biological Tissues Complex Permitivity at Microwave Frequencies
Faktorova, Dagmar; University of Zilina

Formato:	,
Enlaces:	In the paper an universal overview of polarizing mechanisms with an emphasis on dipolar materials as the investigated tissues are regarded. Experimental apparatus is presented with giving its specificity as well as the method used at calculation of complex permittivity.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

87.

Iterrative Correction of Measurement with Averaging of Dithered Samples
Kamensky, Miroslav; Slovak University of Technology in Bratislava - Kovac, Karol; Slovak University of Technology in Bratislava

Formato:	,
Enlaces:	Self-calibration techniques could eliminate measurement errors caused by time changes and component aging. For ADC performance enhancement also averaging is necessary. In the paper the iterative measurement error correction method is presented in combination with averaging. Dither theory for Gaussian…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

88.

Position Control of PMSM in Sliding Mode
Bris, Peter - Vittek, Jan - Makys, Pavol

Formato:	,
Enlaces:	In the paper control of linear permanent magnet synchronous motor (PMSM) based on the principles of sliding mode control (SMC) with respect of vector control principles is carried out. The presented simulations comprise position quantization due to assumed experimental verification…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

89.

Pulse Response Measurement and Processing by Six-Port Reflectometr
Majer, Norbert - Haring, Jan - Poloha, Peter - Wieser, Vladimir

Formato:	,
Enlaces:	In this paper the pulse response estimation of radio channel by Six-port reflectometer (SPR) is described. The measurement of pulse response is in real time, with baseband conversion and without demodulation. This system is simple, small, exact and inexpensive. In…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

90.

A New Identification Method of Both Magnetization Characteristic and Parameters of an Unloaded Transformer
Orsag, Petr; VSB - Technical University of Ostrava - Kijonka, Jaromir; VSB - Technical University of Ostrava

Formato:	,
Enlaces:	In this paper a new method of identification of both the magnetization characteristic and the instantaneous parameters G(t) and K(t) of a single-phase transformer under a sinusoidal supply voltage is proposed. The instantaneous conductance G(t) and inverse inductance K(t) of…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

91.

Optimalization Method of EMI Power Filters and its Measurement
Sedlacek, Jiri; Brno University of Technology - Szabo, Zoltan; Brno University of Technology

Formato:	,
Enlaces:	One of the most important problems solved nowadays is the improvement of the electronic systems immunity. This paper deals with the modelling and synthesis of EMC power filters. This is very important in the field of the electromagnetic compatibility and…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

92.

Application of Space Vector Modulation in Direct Torque Control of PMSM
Malek, Michal - Vittek, Jan - Vavrus, Vladimir - Stulrajter, Marek

Formato:	,
Enlaces:	The paper deals with an improvement of direct torque control method for permanent magnet synchronous motor drives. Electrical torque distortion of the machine under original direct torque control is relatively high and if proper measures are taken it can be…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

93.

The Study of Several Variants of the Traction Drive with Middle-Frequency Transformer
Pittermann, Martin - Drabek, Pavel - Fort, Jiri - Cedl, Marek

Formato:	,
Enlaces:	This paper presents research motivated by industrial demand for special traction drive topology devoted to minimization of traction transformer weight of traction vehicles. The main attention has been given to the special traction drive topology for AC power systems: input…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

94.

Comparison of an Analog Behavioral and Transistor Level Model of Operational Amplifier
Durackova, Daniela - Kovac, Karol - Smiesko, Viktor

Formato:	,
Enlaces:	In the present time of the electronics development lot of the measure equipments are standing in a very close neighborhood of each other. The surrounding of them is then full of various signals of various frequencies and shapes. The electromagnetic…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

95.

A Passive Optical Location with Limited Range
Fiala, Pavel; Brno University of Technology - Jirku, Tomas; Brno University of Technology - Kubasek, Radek; Brno University of Technology - Szabo, Zoltan; Brno University of Technology - Konas, Petr; Mendel University of Agriculture and Forestry

Formato:	,
Enlaces:	We know active and passive methods of a location. This article deals only with a passive location of dynamic targets. The passive optics location is suitable just for tracking of targets with mean velocity which is limited by the hardware…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

96.

Modeling of A-DLTS Spectra of MOS Structures
Hockicko, Peter - Sidor, Peter - Bury, Peter - Kudelcik, Jozef - Jamnicky, Igor

Formato:	,
Enlaces:	Acquisition of basic characteristic of defects has become possible through a wide class of measurement techniqueswhich probe the interface, the near interface, as well as the bulk of semiconductor. Results presented here are basedessentially on the acoustic version of Deep…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

97.

Total Eddy Currents Induced in Screens of a Symmetrical Three-Phase Single-Pole Gas-Insulated Transmission Line (GIL)
Piatek, Zygmunt; Czestochowa University of Technology

Formato:	,
Enlaces:	In the paper we discuss the question of eddy currents induced in screens of a symmetrical three-phase singlepole gas-insulated transmission line (GIL). First, we determine the eddy currents induced in the tubular screen by the magnetic field of self-current of…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

98.

Semantic Analysis of Multimedial Information Usign Both Audio and Visual Clues
Lukac, Andrej

Formato:	,
Enlaces:	Nowadays, there is a lot of information in databases (text, audio/video form, etc.). It is important to be able to describe this data for better orientation in them. It is necessary to apply audio/video properties, which are used for metadata…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

99.

High-Frequency EMI Noise Suppression by Polymer-Based Composite Magnetic Materials
Dosoudil, Rastislav - Franek, Jaroslav - Usakova, Marianna - Olah, jozef - Slama, Jozef

Formato:	,
Enlaces:	The complex permeability and EM-wave absorption properties of hybrid polymer-based composite magneticmaterials (with MnZn and LiZn ferrite fillers and PVC matrix) prepared with constant total filler content (65 vol%) andparticle size (0-250 mm) have been investigated in the 1-1000 MHz…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

100.

Mathematical Model and Computational Analysis of Selected Transient States of Cylindrical Linear Induction Motor Fed via Frequency Converter
Rusek, Andrzej - Popenda, Andrzej

Formato:	,
Enlaces:	The mathematical model of cylindrical linear induction motor (C-LIM) fed via frequency converter is presented in the paper. The model was developed in order to analyze numerically the transient states. Problems concerning dynamics of ac-machines especially linear induction motor are…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering