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Wyszukujesz frazę "Martynyuk, O." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-5 z 5
    Tytuł:
    On spectra of quadratic operator pencils with rank one gyroscopic linear part
    Autorzy:
    Boyko, O.
    Martynyuk, O.
    Pivovarchik, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/255317.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    quadratic operator pencil
    gyroscopic force
    eigenvalues
    algebraic multiplicity
    Opis:
    The spectrum of a selfadjoint quadratic operator pencil of the form [formula] is investigated where M ≥ 0, G ≥ 0 are bounded operators and A is selfadjoint bounded below is investigated. It is shown that in the case of rank one operator G the eigenvalues of such a pencil are of two types. The eigenvalues of one of these types are independent of the operator G. Location of the eigenvalues of both types is described. Examples for the case of the Sturm-Liouville operators A are given. Keywords: q
    Źródło:
    Opuscula Mathematica; 2018, 38, 4; 483-500
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Periodic signal detection with using duffing system poincare map analysis
    Autorzy:
    Martynyuk, V
    Fedula, M
    Balov, O
    Powiązania:
    https://bibliotekanauki.pl/articles/102192.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    periodic signal detection
    chaotic system
    Duffing oscillator
    Poincare sections
    SNR
    Opis:
    In this article the periodic signal detection method on the base of Duffing system chaotic oscillations analysis is presented. This work is a development of the chaos-based signal detection technique. Generally, chaos-based signal detection is the detection of chaotic-to-periodic state transition under input periodic component influence. If the in¬put periodic component reaches certain threshold value, the system transforms from chaotic state to periodic state. The Duffing-type chaotic systems are often used for such a signal detection purpose because of their ability to work in chaotic state for a long time and relatively simple realization. The main advantage of chaos-based signal detection methods is the utilization of chaotic system sensitivity to weak signals. But such methods are not used in practice because of the chaotic system state control problems. The method presented does not require an exact system state control. The Duffing system works continuously in chaotic state and the periodic signal detection process is based on the analysis of Duffing system Poincare map fractal structure. This structure does not depend on noise, and therefore the minimum input signal-to-noise ratio required for periodic signal detection is not limited by chaotic system state control tolerance.
    Źródło:
    Advances in Science and Technology. Research Journal; 2014, 8, 22; 26-30
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractional model of the electrochemical capacitor relaxation phenomenon
    Autorzy:
    Martynyuk, V.
    Ortigueira, M. D.
    Fedula, M.
    Savenko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/200913.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrochemical capacitor transfer function
    impulse response
    potential relaxation
    electrochemical impedance spectroscopy
    odpowiedź impulsowa
    elektrochemiczna spektroskopia impedancyjna
    relaksacja
    kondensatory elektrochemiczne
    Opis:
    The fractional model of the electrochemical capacitor (EC) relaxation phenomenon is presented herein. The EC relaxation phenomenon occurs when EC impedance measurements are performed after charge or discharge current interruption during potential relaxation. The EC fractional model is obtained based on the fractional order transfer function, obtained in turn by means of fitting the EC impedance data. The inverse Laplace transform is used to obtain the EC impulse response. Meanwhile, the EC charge and discharge simulations are performed using the EC impulse response.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 4; 441-448
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Investigation of the Cu Ions Diffusion into Bulk Lithium Niobate
    Autorzy:
    Sugak, D.
    Syvorotka, I.
    Yakhnevych, U.
    Buryy, O.
    Martynyuk, N.
    Ubizskii, S.
    Zhydachevskyy, Ya.
    Suchocki, A.
    Kumar, H.
    Janyani, V.
    Singh, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030967.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    66.30.-h
    78.20.-e
    Opis:
    Spatial changes of optical properties of bulk LiNbO₃ crystal were investigated after annealing in CuO powder. The incorporation of copper ions into the crystal was confirmed by registration of additional absorption spectra that revealed formation of the absorption bands of both Cu⁺ (400 nm) and Cu²⁺ (1000 nm) ions. The changes of optical absorption caused by thermal treatment were registered along the direction of diffusion by the probe beam perpendicular to this direction. The anisotropy of diffusion was revealed. The maxima were observed on the depth dependences of additional absorption both for the wavelengths of 400 and 1000 nm for all main crystallographic directions. The concentrations of copper ions were calculated in accordance with the Smakula-Dexter formula. The X-ray diffraction study revealed reflexes which probably belong to CuNb₂O₆, CuNbO₃ and CuO. The halo was observed on these diffraction patterns that confirms the formation of the scattering centers (about 1 nm in diameter) in the near-surface region.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 965-972
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Study of the Ferroelastic Domain Structure in $La_{0.95}Sr_{0.05}Ga_{0.9}Mg_{0.1}O_{3-x}$
    Autorzy:
    Savytskii, D.
    Tataryn, T.
    Martynyuk, N.
    Bismayer, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1550058.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.Mm
    61.72.-y
    61.50.Ah
    Opis:
    Theoretical analysis of the ferro-elastic domain structure of a $La_{0.95}Sr_{0.05}Ga_{0.9}Mg_{0.1}O_{2.925}$ crystal in three different crystallographic phases is presented. Parameters of these configurations are obtained using group theoretical approach, the method of spontaneous deformation as well as theoretical interpretation of twinning resulting from mechanical deformation (mechanical twinning theory). In the three phases of $La_{0.95}Sr_{0.05}Ga_{0.9}Mg_{0.1}O_{2.95}$ - trigonal, orthorhombic and monoclinic - the parameters of ferro-elastic domain structures are determined; namely the quantity of orientation states, symmetry elements of connection between states, orientations and types of domain walls, tensors of spontaneous deformations of the perovskite-type cells for every orientation state, elements of twin shifts, which are needed for the reorientation of some orientation states to others. By using the found parameters of bidomain configurations a mechanism is proposed, which causes chevron-like domain configurations in compounds with martensitic phase transitions.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 48-61
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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