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Wyszukujesz frazę "Vlcek, J." wg kryterium: Autor

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    Tytuł:
    Green tensor in material sciences
    Greenů v tenzor v materiálových vědách
    Autorzy:
    Vlcek, J.
    Otipka, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/112919.pdf
    Data publikacji:
    2017
    Wydawca:
    STE GROUP
    Tematy:
    anisotropy
    effective medium
    polarizability tensor
    Green tensor
    anizotropia
    tensor polaryzowalności
    tensor Greena
    Opis:
    Material properties of heterogeneous nanomaterials modelled by effective medium approximation (EMA) demand specific approaches when metallic inclusions in a host medium are exposed to external magnetic field. Resulting induced anisotropy of permittivity is manifested itself by a specific form of polarizability tensor. In presented work, this one is applied in the so called “strong-couple-dipole” (SCD) method, where the electromagnetic Green tensor is of key importance. The results are oriented to the magneto-plasmonic sensor element design for the use in biology or chemistry.
    Modelování materiálových vlastnosti heterogenních nanomateriálu metodou aproximace efektivním prostredím (EMA) vyžaduje specifický prístup, jsou-li kovové cástice v obklopujícím prostredí vystaveny magnetickému poli. Výsledná indukovaná anizotropie permitivity se projevuje specifickou formou tenzoru polarizovatelnosti. Ten je v této práci aplikován prostrednictvím tzv. metody silne vázaných dipólu (SCD), kde se klícovým zpusobem uplatnuje Greenuv (elektromagnetický) tenzor. Výsledky smerují k návrhu magneto-plasmonického senzoru s užitím v bilogii a chemii.
    Źródło:
    Systemy Wspomagania w Inżynierii Produkcji; 2017, 6, 4; 334-341
    2391-9361
    Pojawia się w:
    Systemy Wspomagania w Inżynierii Produkcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods for Classification of Tactile Patterns in General Position by Helmholtzs Equation
    Autorzy:
    Volf, J.
    Dvorak, M.
    Vlcek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/384955.pdf
    Data publikacji:
    2008
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    pattern recognition
    Helmholtz's equation
    tactile image
    tactile information
    Opis:
    This paper describes new and original methods of tactile pattern recognition in general position applying the solution of Helmholtz's equation for a tactile transducer. Three groups of methods have been formed, based on: (a) calculation of the A matrix eigen value, with the matrix being formed either from the whole pattern, or from the limit points; (b) the scalar characteristic distribution of the components of the pattern's A matrix; (c) the geometrical properties of the A matrix of the pattern. The patterns have been classified into five groups.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2008, 2, 4; 59-63
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical modeling of batch formation in waste incineration plants
    Autorzy:
    Obroučka, K.
    Vlček, J.
    Moravcová, T.
    Blahůšková, V.
    Fojtík, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/779159.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    waste incineration
    waste to energy
    waste storage in containers
    waste storage in boxes
    algorithm for batch formation
    Opis:
    The aim of this paper is a mathematical description of algorithm for controlled assembly of incinerated batch of waste. The basis for formation of batch is selected parameters of incinerated waste as its calorific value or content of pollutants or the combination of both. The numerical model will allow, based on selected criteria, to compile batch of wastes which continuously follows the previous batch, which is a prerequisite for optimized operation of incinerator. The model was prepared as for waste storage in containers, as well as for waste storage in continuously refilled boxes. The mathematical model was developed into the computer program and its functionality was verified either by practical measurements or by numerical simulations. The proposed model can be used in incinerators for hazardous and municipal waste.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 1; 1-6
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experience with application of reagent to heat transfer surfaces of combustion device
    Autorzy:
    Blahůšková, V.
    Vlček, J.
    Grycová, B.
    Jančar, D.
    Velička, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/779996.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    refinery de Sermaize
    combustion equipment
    heat transfer surfaces
    DRIVEX
    cleaning deposits
    Opis:
    The formation of deposits on heat exchange surfaces of combustion equipment causes a decrease in heat exchange, a decrease in power, and consequently deterioration in the economic balance of combustion equipment. The technology of French company A. I. T. DRIVEX has been developing and being applied in practice for many decades. Preventive technology is used as a mean reagent periodically injected during operation into the combustion chamber. Part of the application is always pre-prepared project resolving the location of the injection nozzles into the combustion chamber on the flue gas path. The article describes the experimental usage of reagent GEPERSUITE 2200 at the Sermaize refinery in France. The aim of the test is to evaluate the benefits and advantages of applied technology in the boiler refinery in full operation. The results clearly demonstrate that using the reagent GEPERSUITE 2200 is advantageous in terms of economic and technical properties.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 2; 1-5
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement the Thermal Profile of Steelmaking Ladle with Subsequent Evaluation the Reasons of Lining Damage
    Autorzy:
    Vlček, J.
    Jančar, D.
    Burda, J.
    Klárová, M.
    Velička, M.
    Machovčák, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/354815.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ladle
    refractory lining
    temperature
    enthalpy
    ladle lifetime
    Opis:
    Based on the operational measurement, of which content was to determine ladle thermal profile, there were analysed causes of possible damage of lining in steel ladles by steel breakout through the ladle shell. There exists connection between thermal state of ladle lining during the operation and its lifetime. There were reached to the conclusion that the cause of failure in the lining of ladle is except for high temperature of bath, also wide interval of temperature change during the tap operation, in consequence with possible insufficient pre-heating of ladle, discontinuous operation of aggregate and damage of insulating lining layer, respectively deformation of ladles shell.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 279-282
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensitivity and dynamic phase response to thermal radiation of a polarization-maintaining fiber
    Autorzy:
    Kyselak, M.
    Dvorak, F.
    Maschke, J.
    Vlcek, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/173541.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fiber sensor
    polarization-maintaining fiber
    PMF
    optical fiber
    birefringence
    temperature field disturbance
    approximation equations
    approximation parameters
    Opis:
    This paper deals with the phase shift development between two polarization modes in birefringent fiber, caused by body heat transfer of different temperatures. The aim is to analyze sensitivity and dynamic behaviors, which are significant when optical fiber is used as a sensor of temperature field disturbance. The analysis is based on the values measured during thermal exposure of a section of type PANDA birefringent optical fiber to heat emitted by an exposure body of chosen temperature, placed at a defined distance. The effect of heat transfer through conduction and convection is suppressed by shielding with plastic wraps. The analyzed results, the Stokes parameters and subsequent phase shift, are measured by the polarimeter. The paper follows up on previously published measurement results.
    Źródło:
    Optica Applicata; 2018, 48, 2; 249-261
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase response of polarization-maintaining optical fiber to temperature changes
    Autorzy:
    Kyselak, M.
    Dvorak, F.
    Maschke, J.
    Vlcek, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/173787.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fiber sensor
    polarization maintaining
    optical fiber
    observable Poincare sphere
    birefringence
    temperature field disturbance
    Opis:
    This paper deals with the phase shift development in the polarization-maintaining fiber owing to different temperatures of an applied defined body, where both polarization axes are excited. A variation of the Stokes parameters induced by the phase shift is expressed by the Jones matrix and a depiction on the observable Poincaré sphere. The temperature response of polarization-maintaining fiber and the effects of heat transfer on the phase shift variation of polarization-maintaining fiber were described theoretically. The time dependence of the phase shift development and its direction of rotation on the observable Poincaré sphere was measured and presented graphically. In addition, different response measures for higher and lower temperatures compared with the ambient temperature were experimentally evaluated.
    Źródło:
    Optica Applicata; 2017, 47, 4; 635-649
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Precipitation Effects in Mg-Zn Alloys Studied by Positron Annihilation and Hardness Testing
    Autorzy:
    Hruška, P.
    Čížek, J.
    Vlček, M.
    Melikhova, O.
    Procházka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1196079.pdf
    Data publikacji:
    2014-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    61.72.J-
    Opis:
    In the present work positron annihilation spectroscopy combined with Vickers hardness testing were employed in order to investigate precipitation effects in Mg-Zn alloys. It was found that incoherent precipitates of a metastable Zn-rich phase formed in the samples isochronally annealed above 200C cause hardening of the alloy.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 3; 718-721
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Precipitation Effects in Mg-Tb and Mg-Tb-Nd Alloys
    Autorzy:
    Vlček, M.
    Čížek, J.
    Melikhova, O.
    Hruška, P.
    Procházka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1196115.pdf
    Data publikacji:
    2014-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    61.72.J-
    Opis:
    Investigation of precipitation effects in solution treated Mg-Tb and Mg-Tb-Nd alloy was performed. Solution treated alloys were compared with samples deformed by high pressure torsion to examine influence of deformation on precipitation effects. Dislocations present in samples processed by high pressure torsion can serve as diffusion channels for atoms and also as nucleation sites for precipitates. Therefore precipitation of some phases in high pressure torsion deformed samples was observed at lower temperatures than in solution treated ones.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 3; 744-747
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Positronium Formation in Nanostructured Metals
    Autorzy:
    Čížek, J.
    Melikhova, O.
    Hruška, P.
    Vlček, M.
    Anwand, W.
    Liedke, M.
    Novotný, M.
    Bulíř, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033937.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    41.75.Fr
    36.10.Dr
    Opis:
    Positronium formation in Au films was studied using a magnetically guided continuous slow positron beam with variable energy. Black Au film with porous morphology was compared with conventional smooth Au film. In the smooth Au film positronium is formed on the film surface only. The black Au film exhibits porous sub-surface region containing micro-cavities interconnected with surface. Positronium is formed on inner surfaces of micro-cavities in the sub-surface region and travels through interconnected cavities towards the surface. 3-γ annihilation of ortho-positronium leaves a clear signature in two-dimensional coincidence Doppler broadening spectra. Measures of 3-γ annihilation contribution calculated from single γ-ray and coincidence Doppler broadening spectra were calculated and compared.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1579-1584
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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