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    Wyświetlanie 1-5 z 5
    Tytuł:
    Numerical Implementation of the Fictitious Domain Method for Elliptic Equations
    Autorzy:
    Temirbekov, A. N.
    Wójcik, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/226820.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    elliptic equation
    Dirichlet problem
    equation with rapidly varying coefficients
    computational algorithm
    iterative process
    fictitious domain method
    boundary conditions
    Opis:
    In this paper, we consider an elliptic equation with strongly varying coefficients. Interest in the study of these equations is connected with the fact that this type of equation is obtained when using the fictitious domain method. In this paper, we propose a special method for the numerical solution of elliptic equations with strongly varying coefficients. A theorem is proved for the rate of convergence of the iterative process developed. A computational algorithm and numerical calculations are developed to illustrate the effectiveness of the proposed method.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 3; 219-223
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elongation determination using finite element and boundary element method
    Autorzy:
    Kisała, P.
    Wójcik, W.
    Smailov, N.
    Kalizhanova, A.
    Harasim, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/226029.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    finite element method
    boundary element method
    fiber Bragg gratings
    elongation distribution
    Opis:
    This paper presents an application of the finite element method and boundary element method to determine the distribution of the elongation. Computer simulations were performed using the computation of numerical algorithms according to a mathematical structure of the model and taking into account the values of all other elements of the fiber Bragg grating (FBG) sensor. Experimental studies were confirmed by elongation measurement system using one uniform FBG.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 4; 389-394
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Possibilities for Using a Uniform Bragg Grating in a Tunable Dispersion Compensator
    Autorzy:
    Wójcik, W.
    Kisała, P.
    Yussupova, G.
    Kussambayeva, N.
    Kashaganova, G.
    Harasim, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/226954.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dispersion compensation
    group delay
    fiber Bragg gratings
    tunable dispersion compensator
    Opis:
    The article presents a tunable fibre optic dispersion compensator system, consisting of a specially designed cantilever beam and a uniform Bragg grating. It analyses the group delay and dispersion characteristics in the case that there is no apodization of the grating and also for a grating with apodization used for modulation of the refractive index. Various apodization parameters were tested, along with their effects on the dispersion characteristics of the entire system properties. It is demonstrated in the paper that the apodization parameter affects the compensator’s group delay characteristic. The finite elements method was used to design a compensator of such a shape that enabled chirp to be induced in a grating of a specified shape. A new design is presented for the system, in which the dispersion properties are tuned by the maximum value of the heterogeneous deformation of the compensator. The paper also includes results showing the effect of the maximum value of heterogeneous stress of the grating on the dispersion characteristics of the proposed construction.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 4; 381-387
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency Evaluation Method for the Devices with Infrasound Impact on Functioning of Computer Equipment
    Autorzy:
    Korchenko, A.
    Tereykovsky, I.
    Aytkhozhaevа, E.
    Seilova, N.
    Kosyuk, Y.
    Wójcik, W.
    Komada, P.
    Sikora, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/963897.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information security
    computer hardware protection
    infrasound
    infrasound damage
    efficiency evaluation method
    Opis:
    A significant threat to critical infrastructure of computer systems has a destructive impact caused by infrasound waves. It is shown that the known infrasound generations are based on using the following devices: a Helmholtz Resonator, Generation by using a Pulsating Sphere such as Monopolies, Rotor-type Radiator, Resonating Cylinder, VLF Speaker, Method of Paired Ultrasound Radiator, and airscrew. Research of these devices was made in this paper by revealing their characteristics, main advantages and disadvantages. A directional pattern of infrasound radiation and a graph of dependence of infrasound radiation from the consumed power was constructed. Also, during the analysis of these devices, there was proven a set of basic parameters, the values of which make it possible to characterize their structural and operational characteristics. Then approximate values of the proposed parameters of each those considered devices, were calculated. A new method was developed for evaluating the effectiveness of infrasound generation devices based on the definition of the integral efficiency index, which is calculated using the designed parameters. An example of practical application of the derived method, was shown. The use of the method makes it possible, taking into account the conditions and requirements of the infrasound generation devices construction, to choose from them the most efficient one.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 2; 189-196
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Use of the Loud Platform in the Work of the Scientific and Educational Cluster
    Autorzy:
    Temirbekov, Nurlan M.
    Takabayev, Tahir M.
    Baigereyev, Dossan R.
    Wójcik, Waldemar
    Gromaszek, Konrad
    Temirbekov, Almas N.
    Omirzhanova, Bakytzhan B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844458.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    IT infrastructure
    cloud solutions
    data center
    server
    Opis:
    The process of designing and creating an integrated distributed information system for storing digitized works of scientists of research institutes of the Almaty academic city is analyzed. The requirements for the storage of digital objects are defined; a comparative analysis of the open source software used for these purposes is carried out. The system fully provides the necessary computing resources for ongoing research and educational processes, simplifying the prospect of its further development, and allows to build an advanced IT infrastructure for managing intellectual capital, an electronic library that is intended to store all books and scientific works of the Kazakhstan Engineering Technological University and research institutes of the Almaty academic city.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 4; 629-634
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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