Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Kulyk, V. V." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-27 z 27
    Tytuł:
    Information support of optimal control of modes of electric systems with renewable energy sources
    Autorzy:
    Kulyk, V. V.
    Bartetska, I. A.
    Buslavets, O. A.
    Gryniewicz-Jaworska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/103356.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    renewable sources of electric energy
    electric systems
    optimal control
    information support
    Opis:
    To provide necessary quality of electric energy and reliable supply and reduce environmental contamination as a result of energy units operation, renewable sources of energy (RSE), in particular solar electric stations (SES), wind electric stations (WES) and small hydropower stations (SHES) are intensively developed. The paper considers the conditions of optimality of renewable sources of energy (RSE) functioning in electric systems, controllability of which is limited by the impact of non-stable weather conditions. The influence of control system information support on the efficiency of RSE usage is shown.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 4; 21-26
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of structural-geometric parameters and elemental composition of spherical VT20 alloy powders
    Autorzy:
    Duriagina, Z. A.
    Filimonov, O. S.
    Kulyk, V. V.
    Lemishka, I. A.
    Kuziola, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/368582.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    spherical VT20 alloy powders
    structural-geometric parameters
    additive technologies
    fluidity
    bulk density
    hydrodynamic radius
    proszek sferyczny
    technologie przyrostowe
    płynność
    gęstość objętościowa
    promień hydrodynamiczny
    Opis:
    Purpose: Identification of structural-geometrical parameters, technological properties and elemental composition of spherical powders in a wide fraction range with respect to the VT20 alloy has been carried out. This is important for evaluating the optimum filling of a given volume by mixture of powders of different fractions during 3D printing. Design/methodology/approach: During the investigation of spherical Ti-alloy powders, a comprehensive approach was performed using Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Dynamic Light Scattering (DLS) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The surface morphology of the powders was studied on a Tuescan Vega 3 Scanning Electron Microscope. Using the Quantax energy dispersive spectrometer, element distribution maps were obtained and histograms of element distribution in the investigated powders were constructed. ICP-MS analysis was performed to clarify the elemental composition. DLS analysis using Malvern's Zetasizer Nano-ZS equipment allowed us to determine the functional parameters (hydrodynamic radius – Rh, zeta potential – z and specific conductivity) of particles of titanium alloy powder that indirectly indicate a tendency to form conglomerates. Findings: According to the microscopic examinations, the VT20 alloy powder consists of globular-shaped particles with the lamellar traces on their surfaces. The uniformity of the chemical element distribution within each fraction of the investigated powders was confirmed by EDS, and the full conformity of the powder fractions with the elemental composition of the VT20 alloy was confirmed by ICP-MS. The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. Research limitations/implications: The use of high sensitive investigation methods gives understanding of the mechanisms of fine structure formation and possibility to control the processes of powder coagulation in the stage of electrostatic interactions. Practical implications: The obtained results can be used for the formation of fine spherical particles of the powder, but at the same time, these technologies can be extended for the particles of non-spherical shape. Originality/value: The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. This, in turn, will improve powder melting during 3D printing. The measured zeta potential values allowed us to reveal mechanisms of fine structure formation and to control the processes of powder coagulation in the stage of electrostatic interactions.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 95, 2; 49-56
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical behavior of wheel steels with solid solution and precipitation hardening
    Autorzy:
    Kulyk, V. V.
    Shipitsyn, S. Ya.
    Ostash, O. P.
    Duriagina, Z. A.
    Vira, V. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/378578.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    railway wheel steel
    alloying
    resistance to flat formation
    wear
    damaging
    stalowe koło kolejowe
    stopowanie
    odporność na formowanie płaskie
    zużycie
    uszkodzenia
    Opis:
    Purpose: The aim of the proposed research is to investigate operational properties of a wheel steel treated with simultaneous solid solution and precipitation hardening at various carbon content, in comparison with the standard wheel grade T steel. Design/methodology/approach: The mechanical behaviour of wheel steels with increased content of silicon, manganese, vanadium, and nitrogen at various carbon content has been investigated and compared to that of the standard high-strength wheel grade T steel. The steels were undergo thermal treatment due to austenitic heating up to a temperature of 950.C with cooling down in water to 550.C followed by intense blowing of blanks in the air. After that, a tempering was performed at a temperature in the range of 450-650.C. Static strength (UTS), relative elongation (TEL), impact toughness tests (KCV) were determined on standard specimens. The characteristics of Mode I fatigue crack growth resistance of steel were determined on the basis of fatigue macrocrack growth rate diagrams da/dN–ΔKI, obtained by the standard method on compact specimens with the thickness of 10 mm at a frequency of 10-15 Hz and the stress ratio R = 0.1 and R = 0.5 of the loading cycle. The characteristics of Mode II fatigue crack growth resistance were determined on the basis of da/dN–ΔKII diagrams, obtained earlier method on edge notched specimens with the thickness 3.2 mm at a frequency of 10-15 Hz and R = -1 taking account of the crack face friction. Rolling contact fatigue testing was carried out on the model specimens. Findings: The regularities of the change of mechanical characteristics of the high-strength wheel steel with simultaneous solid solution and precipitation hardening at lowered carbon content under static, impact and cyclic loading are studied. Research limitations/implications: The results obtained using laboratory samples should be checked during a real railway wheels investigation. Practical implications: The investigated steel with simultaneous solid solution and precipitation hardening provides high wear resistance of the tread surface and damage resistance determined on the model wheels. Originality/value: A steel with solid solution hardening due to increased content of silicon (up to 0.7%) and manganese (up to 0.8%) and also with precipitation hardening (at optimal content of vanadium and nitrogen [V‧N]‧104 = 28.9%) at lowered carbon content (0.52) possesses high strength and fatigue fracture toughness in cases of Mode I and Mode II loading, causing better combination of wear and damage resistances of the tread surface of the model wheels, as compared to corresponding parameters for grade T steel.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 95, 2; 49-54
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of water vapor containing hydrogenous atmospheres on the micro-structure and tendency to brittle fracture of anode materials of YSZ–NiO(Ni) system
    Autorzy:
    Kulyk, V.V.
    Vasyliv, B.D.
    Duriagina, Z.A.
    Kovbasiuk, T.M.
    Lemishka, I.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175787.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    YSZ–NiO ceramics
    hydrogen
    water vapor
    ceramika YSZ-NiO
    wodór
    para wodna
    Opis:
    Purpose: The purpose of this work is to estimate the tendency to brittle fracture of the YSZ–NiO(Ni) anode cermet in a hydrogenous environment with various concentrations of water vapor. Design/methodology/approach: YSZ–NiO ceramic plates were fabricated by sintering in an argon atmosphere. The treatment of material was performed in a hydrogenous environment with various concentrations of water vapor. The strength test was performed under three-point bending at 20°C in air. The microstructure and morphology of the fracture surface of the specimens were studied using a scanning electron microscope (SEM) Carl Zeiss EVO-40XVP. The chemical composition was determined using an INCA ENERGY 350 spectrometer. Microhardness measurements were performed on a NOVOTEST TC-MKB1 microhardness tester. The configuration of the imprints and cracks formed was studied on an optical microscope Neophot-21. The porosity of the materials was investigated by analysing the SEM micrographs using the image processing technique. Findings: Peculiarities of changes in the microstructure, the morphology of specimens fracture surface, physical and mechanical characteristics of YSZ–NiO(Ni) material for solid oxide fuel cell (SOFC) anodes of different preconditioning modes aged under various partial pressures of water vapor in a hydrogenous environment are found. Research limitations/implications: To study the actual behaviour of the YSZ–NiO(Ni) anode material in the operating environment, it is necessary to evaluate its strength, Young’s modulus, microhardness, and fracture toughness by changing with a certain step the partial pressure of water vapor in the whole range noted in this work.Practical implications: Based on the developed approach to assessing the propensity to brittle fracture of the formed cermet microstructure, it is possible to obtain an anode material that will provide the necessary functional properties of a SOFC. Originality/value: An approach to estimating the propensity to brittle fracture of a formed cermet structure is proposed based on the microhardness and fracture toughness characteristics obtained by the Vickers indentation method.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 108, 2; 49--67
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and electrochemical properties of the vanadium alloys after low-temperature nitrogen plasma treatment
    Autorzy:
    Duriagina, Z. A.
    Ryzhak, D. D.
    Kulyk, V. V.
    Tepla, T. L.
    Lemishka, I. A.
    Bohun, L. I .
    Powiązania:
    https://bibliotekanauki.pl/articles/1818517.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    vanadium alloy
    surface layers
    microhardness
    corrosion
    stop wanadu
    warstwy powierzchniowe
    mikrotwardość
    korozja
    Opis:
    Purpose: The proposed research aims to determine the expediency of surface treatment of vanadium alloys of V-Cr and V-Ti systems due to irradiation of their surfaces with low- temperature nitrogen plasma using plasma torch NO-01. Design/methodology/approach: The investigation of microstructure and X-ray fluorescence analysis (XRF) of the samples were performed using an electron microscope TESCAN Vega3. The microhardness (Vickers hardness) of the samples was measured before and after surface treatment. The study of corrosive properties of the surface layers was performed by an electrochemical impedance spectroscopy (EIS) method. Corrosion damages were identified using impedance dependences. Findings: The microstructure of the surface layers of the V-8Ti, V-15Cr, and V-35Cr alloys in the initial state and after plasma treatment have been investigated. The chemical composition of the surface layers is determined and comparative measurements of the microhardness of these alloys are carried out. Corrosion-electrochemical properties (corrosion potentials, electrochemical impedance spectroscopy and constructed potential-dynamic polarization curves) of investigated alloys after treatment with nitrogen plasma are evaluated. Research limitations/implications: The results obtained using laboratory samples should be checked at the conditions of power equipment operation. Practical implications: This treatment has advantages over other methods of surface engineering since it provides strong surface plastic deformation and the possibility of formation of secondary phases resulting in increases in surface hardness and corrosion resistance. Originality/value: Vanadium alloys have significant advantages over other structural materials due to their high thermal conductivity and swelling resistance, high strength and plasticity up to temperatures of 700-800°C, and good weldability.
    Źródło:
    Archives of Materials Science and Engineering; 2020, 102, 1; 5--12
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of conditions for loss of bearing capacity of underground ammonia pipelines based on the monitoring data and flexible search algorithms
    Autorzy:
    Mysiuk, R.V.
    Yuzevych, V.M.
    Yasinskyi, M.F.
    Kniaz, S.V.
    Duriagina, Z.A.
    Kulyk, V.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200550.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    underground ammonia pipeline
    pump station
    thermal background
    corrosion current
    data processing
    cloud computing
    podziemny rurociąg amoniaku
    stacja pomp
    tło termiczne
    prąd korozyjny
    przetwarzanie danych
    chmura obliczeniowa
    Opis:
    Purpose: The study aims to diagnose the corrosion current density in the coating defect on the outer surface of the ammonia pipe depending on the distance to the pumping station, taking into account the interaction of media at the soil-steel interface and using modern graphical data visualization technologies and approaches to model such a system. Design/methodology/approach: The use of an automated system for monitoring defects in underground metallic components of structures, in particular in ammonia pipelines, is proposed. The use of the information processing approach opens additional opportunities in solving the problem of defect detection. Temperature and pressure indicators in the pipeline play an important role because these parameters must be taken into account in the ammonia pipeline for safe transportation. The analysis of diagnostic signs on the outer surface of the underground metallic ammonia pipeline is carried out taking into account temperature changes and corrosion currents. The parameters and relations of the mathematical model for the description of the influence of thermal processes and mechanical loading in the vicinity of pumping stations on the corresponding corrosion currents in the metal of the ammonia pipeline are offered. Findings: The paper evaluates the corrosion current density in the coating defect on the metal surface depending on the distance to the pumping station and the relationship between the corrosion current density and the characteristics of the temperature field at a distance L = 0…20 km from the pumping station. The relative density of corrosion current is also compared with the energy characteristics of the surface layers at a distance L = 0…20 km from the pumping station. An information system using cloud technologies for data processing and visualization has been developed, which simplifies the process of data analysis regarding corrosion currents on the metal surface of an ammonia pipeline. Research limitations/implications: The study was conducted for the section from the pumping station to the pipeline directly on a relatively small data set. Practical implications: The use of client-server architecture has become very popular, thanks to which monitoring can be carried out in any corner of the planet, using Internet data transmission protocols. At the same time, cloud technologies allow you to deploy such software on remote physical computers. The use of the Amazon Web Service cloud environment as a common tool for working with data and the ability to use ready-made extensions is proposed. Also, this cloud technology simplifies the procedure of public and secure access to the collected information for further analysis. Originality/value: Use of cloud environments and databases to monitor ammonia pipeline defects for correct resource assessment.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 115, 1; 13--20
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of structure and morphology of surface layers formed on TRIP steel by the femtosecond laser treatment
    Autorzy:
    Duriagina, Z. A.
    Tepla, T. L.
    Kulyk, V. V.
    Kosarevych, R. Ya.
    Vira, V. V.
    Semeniuk, O. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/367952.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    femtosecond laser
    TRIP steel (03X13AG19)
    image processing algorithms
    digital image analysis
    metallographic complex
    laser femtosekundowy
    stal TRIP
    algorytmy przetwarzania obrazu
    cyfrowa analiza obrazu
    Opis:
    Purpose: The purpose of the work is to demonstrate the possibility of using a femtosecond laser for forming surface layers with an adjustable microstructure on the surface of TRIP steel 03X13AG19, and processing the obtained images using digital complexes. Design/methodology/approach: A laser treatment of TRIP steel (03X13AG19) with pulses of femtosecond duration was carried out in a melting mode. The source of the radiation is a femtosecond titanium-sapphire Ti:Al2O3 complex consisting of a predefining femtosecond generator “Mira Optima 900-F” and regenerative amplifier Legend F-1K-HE. Peculiarities of the surface structure of irradiated samples were studied using a Solver P47-PRO atomic force microscope. The structural-geometric parameters of the surface of the investigated steel treated with the femtosecond laser were determined using the software package Nova 1.0.26.1443 and the functions of the Image Analysis. Microstructural analysis was performed using a raster electron microscope JSM 6700F and a METAM-1P microscope. In this work, the digitization of images of microstructures obtained as a result of surface irradiation by highly concentrated energy streams of femtosecond duration has been carried out. The analysis of the surface structure of laser-structured materials was carried out using a metallographic complex with the software ImProcQCV. Findings: It has been revealed that the predetermined change of the laser treatment mode changes the microrelief and the shape and size of the fragments of the surface structure of the investigated steel. The use of digital image processing allowed to generalize the morphological features of the surface structure, to assess in detail the character of the microrelief, and to monitor under in-situ mode the structure and properties of the surface of the material being studied. Research limitations/implications: The obtained research results can be applied to stainless steels of various structural classes. Practical implications: Surface digitization significantly reduces the time for research, improves the quality and accuracy of the data obtained, makes it possible to conduct in-situ researches with the further implementation of the results using the Internet of Things technologies. Originality/value: A comprehensive approach is proposed for the estimation of parameters of laser-induced periodic surface structures (LIPSS) using a metallographic complex with the software ImProcQCV.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 93, 1-2; 5-19
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Boosting-based model for solving Sm-Co alloy’s maximum energy product prediction task
    Autorzy:
    Trostianchyn, A.M.
    Izonin, I.V.
    Duriagina, Z.A.
    Tkachenko, R.O.
    Kulyk, V.V.
    Havrysh, B.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200577.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    Sm-Co alloy
    ensemble learning
    gradient boosting
    prediction accuracy
    Stop Sm-Co
    uczenie zespołowe
    dokładność przewidywania
    Opis:
    Purpose: This paper aims to decide the Sm-Co alloy’s maximum energy product prediction task based on the boosting strategy of the ensemble of machine learning methods. Design/methodology/approach: This paper examines an ensemble-based approach to solving Sm-Co alloy’s maximum energy product prediction task. Because classical machine learning methods sometimes do not supply acceptable precision when solving the regression problem, the authors investigated the boosting ML model, namely Gradient Boosting. Building a boosting model based on several weak submodels, each of which considers the errors of the prior ones, provides substantial growth in the accuracy of the problem-solving. The obtained result is confirmed using an actual data set collected by the authors. Findings: This work demonstrates the high efficiency of applying the ensemble strategy of machine learning to the applied problem of materials science. The experiments determined the highest accuracy of solving the forecast task for the maximum energy product of Sm-Co alloy formed on the boosting model of machine learning in comparison with classical methods of machine learning. Research limitations/implications: The boosting strategy of machine learning, in comparison with single algorithms of machine learning, requires much more computational and time resources to implement the learning process of the model. Practical implications: This work demonstrated the possibility of effectively solving Sm-Co alloy’s maximum energy product prediction task using machine learning. The studied boosting model of machine learning for solving the problem provides high accuracy of prediction, which reveals several advantages of their use in solving issues applied to computational material science. Furthermore, using the Orange modelling environment provides a simple and intuitive interface for using the researched methods. The proposed approach to the forecast significantly reduces the time and resource costs associated with studying expensive rare earth metals (REM)-based ferromagnetic materials. value: The authors have collected and formed a set of data on predicting the maximum energy product of the Sm-Co alloy. We used machine learning tools to solve the task. As a result, the most increased forecasting precision based on the boosting model is demonstrated compared to classical machine learning methods.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 116, 2; 71--80
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing surface fatigue crack growth in railway wheelset axle
    Autorzy:
    Rudavskyi, D. V.
    Kaniuk, Yu. I.
    Duriagina, Z. A.
    Kulyk, V. V.
    Shefer, M. S.
    Dolinska, I. Ya.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818483.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    fatigue crack growth
    mixed mode
    railway axles
    stress intensity factor
    estimation model
    wzrost pęknięć zmęczeniowych
    tryb mieszany
    osie kolejowe
    współczynnik intensywności naprężeń
    model szacowania
    Opis:
    Purpose: The aim of the proposed research is to create a calculation model of surface fatigue crack growth at the axle of railway wheelset working under operational loads. Design/methodology/approach: The energy approach of the fracture mechanics was used to formulate the calculation model of fatigue crack propagation at the wheelset axle surface. The method of least squares was used to determine the investigated material mechanical constants that the kinetic equations of the calculation model contain. The system of differential equations of crack growth kinetics was solved numerically using the Runge-Kutta method. Findings: On the basis of the energy approach of the fracture mechanics the calculation model of fatigue macrocrack growth in three-dimensional elastic-plastic body in case of a mixed-mode I+II+III macromechanism of fracture has been built. On the basis of the created calculation model, the kinetics of the growth of fatigue cracks was investigated both in the middle part of the wheelset axle and in the axle journal. Research limitations/implications: The results obtained on laboratory specimens should be tested during a real railway wheelset axle investigation. Practical implications: The created calculation model can be used in practice to formulate method of residual lifetime estimation of railway wheelset axle. Originality/value: It was shown, that surface crack kinetics depends not only on the crack initial area but also significantly depends on the crack edge geometry and comparatively small crack-like defects at the wheelset axle surface can reach critical sizes in comparatively short run. It has been found that mechanical shear stresses caused by the weight of the loaded railway wagon in the cross section of the wheelset axle journal can significantly accelerate the growth of the transverse fatigue crack at the axle surface, reducing the period of crack subcritical growth by about 20%.
    Źródło:
    Archives of Materials Science and Engineering; 2020, 106, 2; 59--67
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The character of the structure formation of model alloys of the Fe-Cr-(Zr, Zr-B) system synthesized by powder metallurgy
    Autorzy:
    Duriagina, Z. A.
    Romanyshyn, M. R.
    Kulyk, V. V.
    Kovbasiuk, T. M.
    Trostianchyn, A. M.
    Lemishka, I. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/366907.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    model alloys
    phase diagram
    microstructure
    microhardness
    XRD analysis
    stop modelowy
    diagram fazowy
    mikrostruktura
    mikrotwardość
    analiza XRD
    Opis:
    Purpose: The purpose of the work is to synthesize and investigate the character of structure formation, phase composition and properties of model alloys Fe75Cr25, Fe70Cr25Zr5, and Fe69Cr25Zr5B1. Design/methodology/approach: Model alloys are created using traditional powder metallurgy approaches. The sintering process was carried out in an electric arc furnace with a tungsten cathode in a purified argon atmosphere under a pressure of 6·104 Pa on a water cooled copper anode. Annealing of sintered alloys was carried out at a temperature of 800°C for 3 h in an electrocorundum tube. The XRD analysis was performed on diffractometers DRON-3.0M and DRON-4.0M. Microstructure study and phase identification were performed on a REMMA-102-02 scanning electron microscope. The microhardness was measured on a PMT-3M microhardness meter. Findings: When alloying a model alloy of the Fe-Cr system with zirconium in an amount of up to 5%, it is possible to obtain a microstructure of a composite type consisting of a mechanical mixture of a basic Fe2(Cr) solid solution, solid solutions based on Laves phases and dispersive precipitates of these phases of Fe2Zr and FeCrZr compositions. In alloys of such systems or in coatings formed based on such systems, an increase in hardness and wear resistance and creep resistance at a temperature about 800°C will be reached. Research limitations/implications: The obtained results were verified during laser doping with powder mixtures of appropriate composition on stainless steels of ferrite and ferrite-martensitic classes. Practical implications: The character of the structure formation of model alloys and the determined phase transformations in the Fe-Cr, Fe-Cr-Zr, and Fe-Cr-B-Zr systems can be used to improve the chemical composition of alloying plasters during the formation of ferrite and ferrite-martensitic stainless steel coatings. Originality/value: The model alloys were synthesized and their phase composition and microstructure were studied; also, their microhardness was measured. The influence of the chemical composition of the studied materials on the character of structure formation and their properties was analysed.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2020, 100, 2; 49-57
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of electrolyte composition on the plasma electrolyte oxidation and phase composition of oxide ceramic coatings formed on 2024 aluminium alloy
    Autorzy:
    Posuvailo, V. M.
    Kulyk, V. V.
    Duriagina, Z. A.
    Koval’chuck, I. V.
    Student, M. M.
    Vasyliv, B. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818491.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    microstructure
    hydrogen peroxide
    porosity
    plasma electrolyte synthesis
    plasma electrolyte oxidation
    mikrostruktura
    nadtlenek wodoru
    porowatość
    Opis:
    Purpose: Purpose of this work is to analyse the process of synthesis of oxide ceramic coatings in plasma electrolytes on 2024 aluminium alloy and to form an electrolyte which allows to reduce energy consumption for the coating formation. Design/methodology/approach: The oxide ceramic coatings were synthesized on 2024 aluminium alloy. The coatings were formed by the alternate application of anode and cathode pulses to the sample. X-ray diffraction analysis of coatings was performed on a DRON-3.0 X-ray diffractometer using CuKa radiation. The thickness of the coatings was determined using a CHY TG-05 thickness gauge. The porosity of the coatings was investigated by analysing the micrographs of the plasma electrolyte oxidation (PEO) coatings obtained on a scanning electron microscope at x500 magnification using the image processing technique. Findings: The electrolyte with 5 g/l H2O2 additive have been elaborated as an optimal composition for synthesis of a coating with an increased content of corundum (a-Al2O3) as compared to a coating synthesized in the same mode in the 3KOH+2Na2SiO3 electrolyte without H2O2. This synthesis mode allows obtaining a coating with a high corundum content at low energy consumption. Research limitations/implications: For further optimization of the synthesis modes, it is necessary to analyse the influence of the phase composition and porosity of the obtained oxide ceramic coatings on their microhardness, wear resistance, and corrosion resistance. Practical implications: Based on the developed modes of synthesis of the coatings, it will be possible to obtain wear and corrosion resistant oxide ceramic coatings with predetermined functional properties and to reduce energy consumption for their formation. Originality/value: Methods for accelerating the formation of coatings have been proposed and tested, in particular, by adding various amounts of hydrogen peroxide to the electrolyte. The content of oxides in the obtained coatings, in particular, their ratios at various concentrations of hydrogen peroxide in the electrolyte, were determined by X-ray phase analysis. The modes of synthesis of the coatings were developed which allow obtaining a continuous coating without cracks with simultaneous decreasing porosity from 4.32% to 3.55-3.53%.
    Źródło:
    Archives of Materials Science and Engineering; 2020, 105, 2; 49--55
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of the modification by ultrafine silicon carbide powder on the structure and properties of the Al-Si alloy
    Autorzy:
    Kovbasiuk, T. M.
    Selivorstov, V. Yu.
    Dotsenko, Yu. V.
    Duriagina, Z. A.
    Kulyk, V. V.
    Kasai, O. M.
    Voitovych, V. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818500.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    Al-Si alloy
    silicon carbide
    modification
    mechanical properties
    microstructure
    microhardness
    Stop Al-Si
    węglik krzemu
    modyfikacja
    właściwości mechaniczne
    mikrostruktura
    mikrotwardość
    Opis:
    Purpose: Determine the possibility of modifying aluminium alloys of the Al-Si system with an ultrafine SiC modifier with a particie size of 3-5 pm. Design/methodology/approach: Processing of the Al-Si alloy was carried out by introducing an ultrafine modifier in the amount of 0.1, 0.2, or 0.3 wt.%. Silicon carbide (SiC) with a particle size in the range of 3-5 pm was used as a modifier. To study the microstructure of the formed surface layers, a metallographic analysis was performed according to the standard method on a microscope MIKPOTEX® MMT-14C using TopView software. Microhardness studies of the samples were carried out on a Vickers microhardness tester NOVOTEST TC-MKV1. The microstructure of castings of the AlSi12 grade was studied at magnification from 100 to 400 times on the horizontal and vertical surfaces of the samples after etching with a 2% NaOH aqueous solution. Findings: Aluminium cast alloy of Al-Si system has been synthesized with the addition of 0.1, 0.2, and 0.3 wt.% ultrafine SiC modifier. It was found that the modification of the AlSi12 alloy by SiC particles of 3-5 pm in size led to an improvement of its microstructure due to the reduction of the volume fraction of micropores and primary Si crystals. It was shown that the AlSi12 aluminium alloy due to the modification by 0.2 wt.% SiC has the best micromechanical properties and macrostructure density. Research limitations/implications: The obtained research results are relevant for cast specimens of the indicated sizes and shapes. The studies did not take into account the influence of the scale factor of the castings. Practical implications: The developed modification technology was recommended for use in the conditions of the foundry "Dnipropetrovsk Aggregate Plant" (Dnipro, Ukraine). Originality/value: The technology of AlSi12 alloy modification of ultrafine SIC modifier with a particle size of 3-5 pm was used for the first time.
    Źródło:
    Archives of Materials Science and Engineering; 2020, 101, 2; 57--62
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of yttria content and sintering temperature on the microstructure and tendency to brittle fracture of yttria-stabilized zirconia
    Autorzy:
    Kulyk, V.V.
    Duriagina, Z.A.
    Vasyliv, B.D.
    Vavrukh, V.I.
    Lyutyy, P.Ya.
    Kovbasiuk, T.M.
    Holovchuk, M.Ya.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175775.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    YSZ ceramics
    microhardness
    fracture toughness
    microstructure
    fracture micromechanism
    ceramika YSZ
    mikrotwardość
    odporność na pękanie
    mikrostruktura
    mikromechanizm pękania
    Opis:
    Purpose: The purpose of this work is to evaluate the propensity to brittle fracture of YSZ ceramics stabilized by the various amount of yttria, based on a study of changes in the microstructure, phase composition, and fracture micromechanisms. Design/methodology/approach: The series of 3YSZ, 4YSZ, and 5YSZ ceramic specimens were sintered in an argon atmosphere. Three sintering temperatures were used for each series: 1450°C, 1500°C, and 1550°C. Microhardness measurements were performed on a NOVOTEST TC-MKB1 microhardness tester. The configuration of the imprints and cracks formed was studied on an optical microscope Neophot-21. The fracture toughness of the material was estimated using both the Vickers indentation method and a single-edge notch beam (SENB) test performed under three-point bending at 20°C in air. The microstructure and morphology of the fracture surface of the specimens were studied using a scanning electron microscope Carl Zeiss EVO-40XVP. The chemical composition was determined using an INCA ENERGY 350 spectrometer. Findings: Peculiarities of changes in the microstructure, the morphology of specimens fracture surface, and mechanical characteristics of YSZ ceramic materials of different chemical and phase compositions sintered in a temperature range of 1450°C to 1550°C are found. Research limitations/implications: To study the actual behaviour of YSZ ceramic materials under operating conditions, it is necessary to evaluate their Young’s moduli, strength, microhardness, and fracture toughness in an operating environment of the corresponding parameters (temperature, pressure, etc.).Practical implications: Based on the developed approach to estimating the propensity to brittle fracture of the formed YSZ ceramic microstructure, it is possible to obtain YSZ ceramic material that will provide the necessary physical and mechanical properties of a wide variety of precision ceramic products. Originality/value: An approach to estimating the propensity to brittle fracture of YSZ ceramics stabilized by the various amount of yttria is proposed based on two methods of evaluating crack growth resistance of materials, namely, the Vickers indentation method and SENB method.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 109, 2; 65--79
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizacija rezhimov kolebanij zernovyh smesej pri nalichii suhogo trenija
    Optimization of vibration grain mixes with dry friction
    Autorzy:
    Lovejkin, V.
    Chovnyuk, J.
    Kulyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/77171.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2012, 14, 3
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of basic gas reservoir parameters from radioactive logging taking into account PT-conditions
    Określanie podstawowych parametrów gazonośnych skał zbiornikowych za pomocą kombinacji odwiertowych profilowań radiometrycznych z uwzględnieniem warunków ciśnienia i temperatury
    Autorzy:
    Bondarenko, M.
    Kulyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835427.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    gas reservoirs
    pressure-temperature conditions
    density-neutron loggings
    apparent and true porosities of gas reservoirs
    identification parameter
    gas saturation
    volume gas content
    gazonośne skały zbiornikowe
    termiczno-ciśnieniowe warunki
    kombinacja odwiertowych profilowań gamma-gamma gęstościowego i neutron-neutron
    pozorna i rzeczywista porowatość gazonośnych skał zbiornikowych
    parametr identyfikacyjny,
    nasycenie gazem
    objętościowa zawartość gazu
    Opis:
    The paper suggests methods for determining the basic parameters of ordinary and unconventional gas reservoirs, namely identification parameter, true porosity, gas saturation and volume gas content. The set of these parameters can be obtained in both open wells and cased wells with the help of a combination of density and neutron loggings taking into account PT-conditions of gas reservoirs occurrence (up to 10 km). The application of developed approaches for the estimation of the petrophysical parameters of gas reservoirs are demonstrated by the example of cased gas well.
    W artykule zaproponowano sposoby wyznaczania głównych parametrów, w konwencjonalnych i niekonwencjonalnych gazonośnych skałach zbiornikowych, tzw. parametr identyfikacyjny, rzeczywistą porowatość, nasycenie gazem, objętościową zawartość gazu. Zestaw tych parametrów może być otrzymany zarówno w niezarurowanych, jak i zarurowanych otworach wiertniczych, za pomocą kombinacji radiometrycznych profilowań z uwzględnieniem zmiennych ciśnień i temperatury w skałach zbiornikowych (do 10 km). Zastosowanie przedstawionych w artykule sposobów dla liczbowej oceny petrofizycznych parametrów, gazonośnych skał zbiornikowych zademonstrowano na przykładzie odwiertu zarurowanego.
    Źródło:
    Nafta-Gaz; 2017, 73, 3; 162-168
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Certain methods of complementation of linear extensions of dynamic systems to regular systems
    Pewne metody dopełnienia liniowych rozszerzeń układów dynamicznych do układów regularnych
    Autorzy:
    Kulyk, V.
    Pączko, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/87349.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    linear extension
    dynamical system
    regular system
    rozszerzenie liniowe
    układ dynamiczny
    układ regularny
    Opis:
    The paper presents a method of transformation of two weakly regular systems into one regular system. The method has been generalised to any number of weakly regular systems.
    W artykule przedstawiono metodę doprowadzenia dwóch układów słabo regularnych do jednego układu regularnego. Metoda została uogólniona na dowolną liczbę układów słabo regularnych.
    Źródło:
    Zeszyty Naukowe. Matematyka Stosowana / Politechnika Śląska; 2014, 4; 41-55
    2084-073X
    Pojawia się w:
    Zeszyty Naukowe. Matematyka Stosowana / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compositional and spatial structure of the entrance groups of the public service establisments built-in into the apartment houses
    Autorzy:
    Abyzov, V.
    Kulyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/345524.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
    Tematy:
    entrance groups
    built-in public service establishments
    compositional structure
    spatial structure
    struktura kompozycyjna
    struktura przestrzenna
    Opis:
    Various factors and conditions that affect the organisation of architectural environment of entrance groups of public service establishments located on the ground floors of residential buildings are comprehensively reviewed in the article. Available design features and compositional and spatial solutions of various built-in public service establishments that contribute to the solution of problems of aesthetic expression of residential development.
    Źródło:
    Środowisko Mieszkaniowe; 2015, 14; 88-93
    1731-2442
    2543-8700
    Pojawia się w:
    Środowisko Mieszkaniowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Differences between Fe₃O₄ Micro- and Nanoparticles Properties
    Autorzy:
    Duriagina, Z.
    Tepla, T.
    Kulyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030923.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Fe₃O₄ micro- and nanoparticles
    atomic-force microscopy
    magnetization
    superparamagnetism
    Opis:
    Small sizes of nanoparticles lead to the appearance of new unique functional properties. Under transition to nanosizes in metals and their compounds new specific characteristics appears. In this work, the microstructural and magnetic properties of Fe₃O₄ nanoparticles (Fe₃O₄-NP) have been compared with those of commercially available Fe₃O₄ microparticles (Fe₃O₄-MP) and detailed analysis of differences has been carried out. The synthesis of Fe₃O₄-NP was carried out by means of colloidal method performed without the use of surfactants. Commercial and synthesized particles were characterized using NTEGRA Prima (NT-MDT) atomic force microscope. For magnetic properties investigations we used the method of vibrating sample magnetometer.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 869-872
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The peculiarities of fatigue process zone formation of structural materials
    Osobliwości tworzenia strefy procesu zmęczeniowego w materiałach konstrukcyjnych
    Autorzy:
    Chepil, R.
    Vira, V.
    Kulyk, V.
    Kharchenko, Y.
    Duriagina, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/329634.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    fatigue
    durability
    fatigue process zone
    crack initiation
    crack growth
    defects of materials
    zmęczenie
    trwałość
    strefa procesu zmęczeniowego
    inicjacja pęknięcia
    propagacja pęknięcia
    defekty materiałowe
    Opis:
    It is shown that with a cyclic loading in the vicinity of the stress concentrator within the static and cyclic plastic zones, a specific volume of material is gradually formed - the fatigue process zone. Its size d* determines the length of non-propagated cracks or safety defects in the material and can be a determining factor in the diagnosis of material damage. For these materials, the size d* does not depend a lot on the type and geometric characteristics of the stress concentrator. It can be determined by laboratory conditions. While detecting the defects which are longer than d* , it is decided to reduce the intervals between inspections of the construction element, repair or replace it.
    Pokazano, że cykliczne obciążenie w pobliżu koncentratora naprężeń w statycznych i cyklicznych strefach plastycznych stopniowo tworzy specyficzną objętość materiału - strefę procesu zmęczeniowego. Jej rozmiar d* określa długość nierosnących pęknięć lub innych bezpiecznych defektów i może być czynnikiem decydującym w diagnozie uszkodzeń materiału. Dla badanych materiałów rozmiar d* mało zależy od rodzaju i geometrycznych charakterystyk koncentratora naprężeń. Można go wyznaczyć w warunkach laboratoryjnych. Po ujawnieniu defektów, dłuższych niż d* , podejmuje się decyzję o skróceniu czasu między przeglądami elementów konstrukcji, jego remoncie lub zamianie.
    Źródło:
    Diagnostyka; 2018, 19, 4; 27-32
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of the soil and climate conditions on the formation of the crop yield and germinating power of the switchgrass (Panicum virgatum L.) seeds
    Wpływ warunków glebowych i klimatycznych na wielkość plonu i zdolność kiełkowania nasion prosa rózgowego (Panicum virgatum L.)
    Autorzy:
    Kulyk, M.
    Rozhko, I.
    Kurylo, V.
    Bulgakov, V.
    Ivanovs, S.
    Adamovics, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/336776.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    switchgrass
    soil
    temperature
    seeds
    crop yield
    proso rózgowe
    gleba
    temperatura
    nasiona
    plon
    Opis:
    This paper investigates the productivity of the switchgrass seeds (Panicum virgatum L.) in close interaction with the agroecological conditions of the vegetation period. An impact has been established of the storage period on the indicator of the laboratory germination power of the seeds, which has been obtained under different soil conditions. In the future a highquality seed material of the switchgrass can provide better conditions for the growth and development of plants in the initial stages of organogenesis.
    W pracy zbadano produktywność nasion prosa rózgowego (Panicum virgatum L.) w ścisłym powiązaniu z warunkami rolno-ekologicznymi okresu wegetacji. Ustalono wpływ okresu przechowywania na wskaźnik zdolności kiełkowania nasion przez laboratorium, uzyskany w różnych warunkach glebowych. W przyszłości wysokiej jakości materiał może zapewnić lepsze warunki wzrostu i rozwoju roślin w początkowych etapach organogenezy.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2018, 63, 4; 101-105
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Properties and Temperature Behaviour οf Optical Absorption Edge in Polycrystalline ZnO:X (Cu,Ag) Films
    Autorzy:
    Kulyk, B.
    Figà, V.
    Kapustianyk, V.
    Panasyuk, M.
    Serkiz, R.
    Demchenko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400391.pdf
    Data publikacji:
    2013-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Ps
    78.40.Fy
    68.55.ag
    Opis:
    Silver- and copper-doped ZnO films were prepared by radio-frequency magnetron sputtering on glass substrates. The influence of dopants content on the structural, morphological properties as well as on evolution of the optical absorption edge was considered. It has been found that Ag- and Cu-doped ZnO films are characterized by wurtzite crystalline structure with the preferred direction of crystalline orientation (002). The sizes of grains within the films were found to be dependent on the type of dopant. The temperature evolution of the optical absorption edge is described by the modified Urbach rule that reflects polycrystalline nature of the material. The corresponding parameters concerning electron- (exciton-) phonon interaction, phonon energies and temperature changes of the band-gap were determined and analysed.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 1; 92-97
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive optimal control of electric power system operation mode on the basis of least action principle
    Autorzy:
    Lezhniuk, Petro D.
    Kulyk, Volodymyr V.
    Netrebskiy, Volodymyr V.
    Duchkov, Yevhenii V.
    Gryniewicz-Jaworska, Michalina
    Powiązania:
    https://bibliotekanauki.pl/articles/102749.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    electric power system
    electric energy losses
    mode optimization
    automatic control system
    least action principle
    system elektroenergetyczny
    straty energii elektrycznej
    optymalizacja trybu
    automatyczny system kontroli
    Opis:
    Active-adaptive system of electric power system (EPS) modes control, using its ideal (“economic”) mode is suggested. The process of optimal control is constructed in such a manner that EPS current mode by means of control facilities approaches to “economic” mode. Direction, change of EPS current mode parameters are realized for its improvement and they are determined according to the least action principle (LAP). System of automatic control performs optimization actions in the direction, set by LAP, changing parameters of regulation facilities and controlls limitations of EPS mode parameters.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 3; 61-65
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Effects in DMAAS:Cr Ferroelectric Crystal
    Autorzy:
    Kapustianik, V.
    Czapla, Z.
    Eliyachevskyy, Yu.
    Korchak, Yu.
    Kulyk, B.
    Rudyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037039.pdf
    Data publikacji:
    2003-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.40.Ha
    64.70.Kb
    77.84.-s
    78.30.Hv
    Opis:
    This paper presents the results of investigations of the radiation effects in NH$\text{}_{2}$(CH$\text{}_{3}$)$\text{}_{2}$Al(SO$\text{}_{4}$)$\text{}_{2}$×6H$\text{}_{2}$O crystals doped with chromium. On the basis of absorption spectroscopy and resonance Raman scattering study it has been shown that comparatively low doses of radiation first of all causes recharging of Cr$\text{}^{3+}$ on Cr$\text{}^{4+}$ ions. Besides, the processes of dehydrogenation and the changes in arrangement of the hydrogen bond network were observed. These changes are followed by distortion of the complexes bonded by such a type of bonds.
    Źródło:
    Acta Physica Polonica A; 2003, 104, 6; 571-580
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Method and gas discharge visualization toolfor analyzing liquid-phase biological objects
    Metoda i narzędzie do wizualizacji wyładowań gazowych do analizy obiektów biologicznych wfazie ciekłej
    Autorzy:
    Kulyk, Yaroslav A.
    Knysh, Bohdan P.
    Maslii, Roman V.
    Kvyetnyy, Roman N.
    Shcherba, Valentyna V.
    Kulyk, Anatoliy I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2033293.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    gas discharge visualization
    liquid-phase biological objects
    wizualizacja wyładowań gazowych
    obiekty biologiczne w fazie ciekłej
    Opis:
    In the article are presented the results of researches that touch the problem of the reliability improvement of determining the impurities concentration in biological objects in liquid by using the method of gas discharge visualization. There is an improved analysis method for biological objects in liquid based on gas discharge visualization (GDV), proposed criteria approach towards the assessment of liquid bio object’s composition applying this method, presented the assessment of the nature of liquid bio objects, which use the intensity of spectral components of its radiation has gotten during GDV. There is a developed and researched math model of ignition of a crown discharge and the dependency of spectrum intensity of radiation of liquid-phase biological object on its chemical composition proposed a conversion function for the assessment of the impurities concentration, together with the informative parameters of GDV images. All the results of the experimental researches of GDV and spectral composition of liquid-phase biological objects (LPBO) are presented in the article. The proposed approach lets specify the range of Mg concentrations in an oral fluid (OF) at various thyroid disorders obtained by the trilonometric method. It was found that the concentration of Mg in oral fluid of patients without thyroid disease is 12.73 ± 2.16 mg/l, patients with risk factors for thyroid disease have a concentration of 14.98 ± 1.92 mg/l, patients with sporadic goiter have a concentration of 26.65 ± 3.73 mg/l. Such data allow providing the patients with a better diagnosis of pathological disorders in glandular thyroids that are based on the concentration of Mg in oral fluid. It is confirmed that the concentration of Mg in oral fluid greater than 15 mg/l may indicate the presence of trilonometric pathology, including the focal thyroid gland.
    W artykule przedstawiono wyniki badań poruszających problem poprawy wiarygodności oznaczania stężenia zanieczyszczeń w obiektach biologicznych w cieczy metodą wizualizacji wyładowań gazowych. Opracowano ulepszoną metodę analizy obiektów biologicznych w cieczy opartą na wizualizacji wyładowań gazowych (GDV), zaproponowano podejście kryterialne do oceny składu obiektów biologicznych w cieczy z zastosowaniem tej metody, przedstawiono ocenę charakteru obiektów biologicznych w cieczy wykorzystującą intensywność składowych spektralnych jej promieniowania uzyskanego podczas GDV.Opracowano i zbadano model matematyczny zapłonu wyładowania koronowego oraz zależność intensywności widma promieniowania obiektu biologicznego w fazie ciekłej od jego składu chemicznego, zaproponowano funkcję przeliczeniową do oceny koncentracji zanieczyszczeń wraz z parametrami informacyjnymi obrazów GDV. W artykule zostały przedstawione wszystkie wyniki badań eksperymentalnych GDV i składu spektralnego obiektów biologicznych w fazie ciekłej (LPBO).Proponowane podejście pozwala określić zakres stężeń Mg w płynie z ust, przy różnych schorzeniach tarczycy uzyskanych metodą trylonometryczną.Stwierdzono, że stężenie Mg w płynie z ust pacjentów bez chorób tarczycy wynosi 12,73 ± 2,16 mg/l, u pacjentów z czynnikami ryzyka chorób tarczycy stężenie wynosi 14,98 ± 1,92 mg/l, u pacjentów z wolem stężenie wynosi 26,65 ± 3,73 mg/l.Dane te pozwalają na zapewnienie pacjentom lepszej diagnostyki zaburzeń patologicznych w tyreocytach gruczołowych, które opierają się na stężeniu Mg w płynie ustnym.Potwierdza się, że stężenie Mg w płynie ustnym większe niż 15 mg/l może wskazywać na obecność patologii trylonometrycznej, w tym ogniska w tarczycy.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2021, 11, 3; 22-29
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Manganite nanoparticles as promising heat mediators for magnetic hyperthermia: comparison of different chemical substitutions
    Autorzy:
    Tovstolytkin, A.
    Shlapa, Yu.
    Solopan, S.
    Bodnaruk, A.
    Kulyk, M.
    Kalita, V.
    Zamorskyi, V.
    Ryabchenko, S.
    Belous, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1052905.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    magnetic nanohyperthermia
    manganite nanoparticles
    complex chemical substitutions
    Curie temperature
    AC magnetic heating characteristics
    Opis:
    Magnetostatic properties and AC magnetic heating characteristics of (La,Sr)MnO₃ nanoparticles with substitutions in manganese and lanthanum sublattices have been studied. The nanoparticles with average sizes in the range 25-38 nm were synthesized via sol-gel method. Fe substitution for Mn, as well as Sm substitution for La have been used in the experiment. It is shown that the increase in substitution level (for both Fe and Sm substitutions) results in lowering the Curie temperature T_{C} and weakening heating efficiency under the action of AC magnetic field. The results demonstrate that the action of AC field causes effective heating of nanoparticles at temperatures lower than T_{C}, while heating efficiency becomes strongly reduced at higher temperatures. It is proved experimentally that the substitutions in Mn sublattice result in more rapid changes of magnetic properties, as compared to the substitutions in La one. Thus, complex substitutions based on suitable combinations of substituting elements may serve as an efficient tool to "softly" tune the maximal temperature achieved during the AC magnetic field induced heating of nanoparticles, which is important for application of these materials as heat mediators for self-controlled magnetic nanohyperthermia.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 1017-1020
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Progress in stellarator research at IPP-Kharkov
    Autorzy:
    Moiseenko, V. E.
    Lozin, O. V.
    Shapoval, A. M.
    Dreval, M. B.
    Kulyk, Y. S.
    Mironov, Y. K.
    Romanov, V. S.
    Pashnev, V. K.
    Sorokovoy, E. L.
    Petrushenya, A. A.
    Ozherel’ev, F. I.
    Kozulya, M. M.
    Konovalov, V. G.
    Maznichenko, S. M.
    Garkusha, I. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/146173.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    stellarator
    radio-frequency heating
    low frequency modes
    magnetic diagnostics
    Opis:
    A new antenna of ‘crankshaft’ type has been installed in the Uragan-2M device in order to increase the plasma density and heating below the ion cyclotron frequency. Antenna operation is modelled by 1D code, which solves boundary problem for time-harmonic Maxwell’s equations in radially non-uniform plasma cylinder. In recent experiments with this antenna, the SXR, CV, OV and OII emission measurements indicate that the light impurity radiation barrier is overcame at this device. Plasma with a temperature of ~50 eV exists during a short period of a few milliseconds. Then the radiation collapse comes owing to strong infl ux of impurities to the plasma column. A new magnetic diagnostics has been installed at Uragan-3M. Using it the poloidal magnetic fi eld is measured and the shift of toroidal current in major radius is registered. A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray (SXR) plasma emission has been recently installed on the U-3M. Different shapes of the SXR emission profi le has been observed in different discharge conditions.
    Źródło:
    Nukleonika; 2016, 61, 2; 91-97
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Method of Time Distribution for Environment Monitoring Using Unmanned Aerial Vehicles According to an Inverse Priority
    Autorzy:
    Wójcik, Waldemar
    Kalizhanova, Aliya
    Kulyk, Yaroslav A.
    Knysh, Bohdan P.
    Kvyetnyy, Roman N.
    Kulyk, Anatoliy I.
    Sichko, Tetiana V.
    Dumenko, Viktoria P.
    Bezstmertna, Oksana V.
    Adikhanova, Saltanat
    Zhassandykyzy, Maral
    Junisbekov, Mukhtar
    Smailov, Nurzhigit
    Yussupova, Gulbahar
    Powiązania:
    https://bibliotekanauki.pl/articles/2202246.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    UAV
    unmanned aerial vehicle
    distributed measurement
    system of mass service
    environment monitoring
    pollution monitoring
    Opis:
    This paper presents a time-saving method for monitoring the ecology of a dispersed territory using the delivery of measurement units provided by unmanned aerial vehicles with measurement sensors according to a reverse priority algorithm. It is achievable because of the decreasing mean waiting time of the order inside a queue during low-priority order servicing. The experimental research that confirms the efficiency of the proposed method in the case of delivery distributed measurement systems for low-priority measurement is carried out. The experimental research of the proposed method in the case of one-channel and many-channel SMD that can have an option of order rejection or an in-queue waiting option is conducted in WeBots. The probability distributions in the case of this system applying are compared with similar probability distributions in the case of systems of direct priority applying. Comparison and analysis enable us to conclude that the probability distribution in the case of SMD with a direct priority of delivery tends to decrease and approximates zero. This is related to the fact that means at the end of the queue to be handled have a lower priority, as these means of measurement take longer to handle the order than those at the head of the queue. Thus, the means of a low priority will be serviced in the last charge and there is a constant possibility that in some cases such orders will be rejected. The proposed method enables moderate this situation by using increasing the possibility of servicing the low-priority orders. The method can increase the efficiency of environmental monitoring and pollution emission control.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 11; 179--187
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-27 z 27

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies