Metabuscador

Filtrado por:

Temas

Año

Más...

Aproximadamente 387 registro(s) hasta el momento: (journal)

Mostrar 10 | 50 | 100 resultados por página

Recurso libre

Epitaxial Layers of InP Doped With Rare Elements for Use in Radiation Detector
Kozak, Halyna - Sopko, Bruno - Zdansky, Karel

Formato:	,
Enlaces:	We have focused on the investigation of the impact of Ce, Eu, Tm, Eu2O3 and Tm2O3 addition in LPE growth process on the properties of InP layers in the context of their application in detector structures.
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

Possibilities of Genetic Algorithm Application in the Calculation of Power Networks Operation,
Rapsik, Miroslav - Altus, Juraj

Formato:	,
Enlaces:	The paper describes the possibilities of genetic algorithm application by the reactive power flows’ optimization in Slovak power transmission system. The methods of reactive power flow calculation and the utilization of genetic algorithms for their minimalization are indicated in the…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

Analysis of Efficiency Characteristics of Squirrel-Cage Induction Motor Loaded With Water System Pump
Lukasik, Zbigniew; Technical University of Radom - Szychta, Leszek; Technical University of Radom

Formato:	,
Enlaces:	The article presents a method of calculating efficiency of squirrel-cage induction motor. This efficiency depends on frequency of the voltage supplied to the motor and on electrical power. Results of laboratory testing of the motor's efficiency are presented.
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

3D Reconstruction of NMR Images
Izak, Peter - Smetana, Milan - Hargas, Libor - Hrianka, Miroslav - Spanik, Pavol

Formato:	,
Enlaces:	This paper introduces experiment of 3D reconstruction NMR images scanned from magnetic resonance device. There are described methods which can be used for 3D reconstruction magnetic resonance images in biomedical application. The main idea is based on marching cubes algorithm. For…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

Fault Diagnosis in Deaerator Using Fuzzy Logic
Srinivasan, S - Kanagasabapathy, P - Selvaganesan, N

Formato:	,
Enlaces:	In this paper a fuzzy logic based fault diagnosis system for a deaerator in a power plant unit is presented. The system parameters are obtained using the linearised state space deaerator model. The fuzzy inference system is created and rule…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

Contribution to Control of an Elastic Two-Mass System by Means of Genetic Algorithm
Ferkova, Zelmira - Zboray, Ladislav

Formato:	,
Enlaces:	Oscillations of an elastic two-mass system with all known parameters may be suppressed by suitable feedback signal. An observer enables to estimate this feedback without measurement of load mechanism speed. This article contains application of genetic algorithms for identification of…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

Domain Wall Mobility in Co-Based Amorphous Wire
Kladivova, Maria - Ziman, Jan - Zagyi, Barnabas

Formato:	,
Enlaces:	Dynamics of the domain wall between opposite circularly magnetized domains in amorphous cylindrical sample with circular easy direction is theoretically studied. The wall is driven by DC current. Various mechanisms which influence the wall velocity were taken into account: current…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

The Limitation of Using the Average Refractive Index Model in Photonic Crystal Fibres
Kacik, Daniel; University of Zilina - Turek, Ivan; University of Zilina

Formato:	,
Enlaces:	Results of investigation of dependence of transmission function of so called “index guiding” photonic crystal fibres on mechanical bending is presented in this paper. The bending was realised in two differently oriented planes. In both cases the influence of the…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

Microstructure Related Characterization of a-Si:H Thin Films PECVD Deposited under Varied Hydrogen Dilution
Vavrunkova, Veronika - Mullerova, Jarmila - Sutta, Pavel

Formato:	,
Enlaces:	We report on the structure and optical properties of hydrogenated silicon thin films deposited by plasma - enhanced chemical vapor deposition (PECVD) from silane diluted with hydrogen in a wide dilution range. The samples deposited with dilutions below 30 were…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

10.

Kinetic Analysis of Mica Tape Curing Process
Polansky, Radek

Formato:	,
Enlaces:	Curing program of thermoset insulating materials and its responsible setting has the key importance for assurance of high quality and reliability of electrical devices. It is possible to determine parameters of this program (temperature and time of curing) by several…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

11.

Theoretical and Probability Analysis of Frequency Selective Circuits
Cherneva, Galina Petkova - Andonov, Antonio Vladimirov

Formato:	,
Enlaces:	The deviations of the circuit characteristics from their nominal values are random quantities and appear as a result of different destabilizing factors. With designing frequency selective circuits, two mutually connected problems are solved. The one is a study on the…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

12.

Investigation of Defects as a Loading Impedance of Waveguide
Faktorova, Dagmar - Majer, Jozef

Formato:	,
Enlaces:	The paper deals with non-destructive microwave measurement of metal defects exploiting the waveguide features at the defect shape evaluation, (e.g. quarter – waveguide transformer). As we notify in the foregoing article we have paid our attention to the non-destructive investigation…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

13.

Signal Compression in Automatic Ultrasonic testing of Rails
Ciszewski, Tomasz - Lukasik, Zbigniew

Formato:	,
Enlaces:	Full recording of the most important information carried by the ultrasonic signals allows realizing statistical analysis of measurement data. Statistical analysis of the results gathered during automatic ultrasonic tests gives data which lead, together with use of features of measuring…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

14.

ZVS Operating Region of Multiresonant DC/DC Boost Conveter
Szychta, Elzbieta

Formato:	,
Enlaces:	Electromagnetic phenomena that occur during stable operation in resonant circuits of multiresonant ZVS boost converter are described, which can be applied in many fields of the needs of DC voltage electricity. The operating region of the converter is defined which…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

15.

Irreversibility of Electrical Insulating Material Properties
Mentlik, Vaclav - Polansky, Radek

Formato:	,
Enlaces:	Property changes in electrical insulating materials that appear during repeated voltage stress (e. g. in an applied voltage test) are an often discussed problem. The voltage exposure leads to irreversible changes in a negative sense as this investigation clearly demonstrates.…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

16.

Modelling of Disturbing Efects within Communication Channel for Safety-Related Communication System
Franekova, Maria; University of Zilina - Rastocny, Karol; University of Zilina

Formato:	,
Enlaces:	The aim of the paper is using of modelling within development of safety–related communication systems presented in the areas where guaranty of safety integrity level is required. In the paper basic principles used in the process of safety evaluation in…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

17.

Modelling the Load Torques of Electric Drive for Polymerization Process
Popenda, Andrzej

Formato:	,
Enlaces:	The problems of mathematical modelling the load torques on shaft of driving motor designed for applications in polymerization reactors are presented in the paper. The real load of polymerization drive is determined as a function of angular velocity. Mentioned function…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

18.

Frequency and Trajectory Objects Evaluation in Frames Sequence
Koniar, Dusan; University of Zilina - Hargas, Libor; University of Zilina - Hrianka, Miroslav; University of Zilina - Spanik, Pavol; University of Zilina

Formato:	,
Enlaces:	Subject of submitted article is an analysis of moving objects in acquired video sequence. Region of interest is kinetics of Ciliated Respiration Epithelium. This analysis is very important for evaluation of medical diagnostics. The article describes image acquisition, preprocessing and…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

19.

Image Deblurring – Wiener Filter Versus TSVD Approach
Bojarczak, Piotr; Radom University of Technology - Lukasik, Zbigniew; Radom University of Technology

Formato:	,
Enlaces:	This paper presents comparison study of two different deblurring methods: Wiener filter and TSVD decomposition. Wiener filter is a method giving the best results when variance of the noise incorporated in blurring process is known a priori. In TSVD decomposition…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

20.

The Software-Based Implementation of the CFAR Reciever for the Processing of the Radar Signal
Gemzicky, Erik

Formato:	,
Enlaces:	The performance of a radar receiver is greatly dependent on the presence of noise. The receiver should achieve the constant false alarm rate (CFAR) and the maximum probability of the target detection. The CFAR receivers are usually used in radar…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

21.

Experimental Analysis of Communitation Process of Power Semiconductor Transistor’s Structures
Spanik, Pavol; University of Zilina - Dobrucky, Branislav - Frivaldsky, Michal - Drgona, Peter - Lokseninec, Ivan

Formato:	,
Enlaces:	The paper deals with testing device designed for experimental examination of processes in power electronics devices during various switching modes is described. Through the use of auxiliary circuits additional switching modes (ZVS, ZCS) are realized except hard switching, and turning-off…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

22.

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

Recurso libre

23.

Four-Wave Mixing Aplication in Semiconductor Optical Amplifier
Odrobinak, Radoslav

Formato:	,
Enlaces:	Four-Wave Mixing (FWM) in semiconductor optical amplifiers is an attrative mechanism for wavelenght coversion in wavelenght-division multiplexed (WDM) systems since it provides modulation format and bit rate transparency over wide tuning ranges. A series of systems experiments evaluating several aspects…
Fecha:	2011-07-07
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

24.

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

Recurso libre

25.

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

Recurso libre

26.

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

Recurso libre

27.

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

Recurso libre

28.

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

Recurso libre

29.

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

Recurso libre

30.

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

Recurso libre

31.

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

Recurso libre

32.

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

Recurso libre

33.

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

Recurso libre

34.

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

Recurso libre

35.

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

Recurso libre

36.

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

Recurso libre

37.

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

Recurso libre

38.

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

Recurso libre

39.

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

Recurso libre

40.

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

Recurso libre

41.

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

Recurso libre

42.

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

Recurso libre

43.

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

Recurso libre

44.

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

Recurso libre

45.

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

Recurso libre

46.

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

Recurso libre

47.

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

Recurso libre

48.

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

Recurso libre

49.

The Turbulent Telecommunications
Kuchar, Anton

Formato:	,
Enlaces:	The paper depicts the rapidly changing scene in the telecommunications arena. It provides an overview of recentkey developments in technologies that enable access to broadband Internet, describes the trends in provisioning services onthe IP platform and discusses policy, regulatory and…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

50.

Location Based Services in GSM Networks and New Possibilities for their Application in Transport
Dubovan, Jozef - Dado, Milan

Formato:	,
Enlaces:	An enormous growth of mobile communication gives new challenges for new services creation. One of the possibilities is to focus attention on the localisation and localisation based services. It gives for mobile networks customers new information about position of another…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering