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    Wyświetlanie 1-3 z 3
    Tytuł:
    Noise Analysis of Differential Multiport Networks : the Wave Approach
    Autorzy:
    Dobrowolski, J. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/226027.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    differential networks
    noise analysis
    noise waves
    noise correlation matrix
    differential noise figure
    Opis:
    In this paper there is presented and discussed a general analysis method for noise characterization of noisy multiport differential networks. It is based on mixed mode, differential and common mode, noise waves representation of noise, generalized mixed-mode scattering parameters and generalized mixed-mode noise wave correlation parameters for the network. There are derived analytical relation between the noise figure for a given output port and the noise matrix and the scattering parameters of the network, as well as the correlations between the input port noise waves. The signal to noise ratio degradation factor is derived and discussed, too. Presented results can be implemented directly in a CAD software noise analysis of differential microwave multiport networks with differential as well as with conventional single ended ports.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 4; 281-286
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noise Characterization of Differential Multi-Element Multiport Networks : the Wave Approach
    Autorzy:
    Dobrowolski, J. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/226146.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    differential networks
    differential noise figure
    noise waves
    noise correlation matrix
    Opis:
    In this paper there is presented and discussed a general analysis method for noise characterization of noisy multi-element multiport differential networks. It is based on mixed mode, differential and common mode, noise waves representation of noise, generalized mixed-mode scattering parameters and generalized mixed-mode noise wave correlation parameters for the network. There are derived analytical relation between the noise figure for a given output port and the noise matrix and the scattering parameters of the network, as well as the correlations between the input port noise waves. The signal to noise ratio degradation factor is derived and discussed, too. Presented results can be implemented directly in a CAD software for noise analysis of differential microwave multi-element multiport networks with differential as well as with conventional single ended ports.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 4; 395-401
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control of the beginning of accidents in railroad operation safety systems in seismically active regions using the noise technology
    Autorzy:
    Aliev, Telman
    Babayev, Tofig
    Alizada, Tahir
    Rzayeva, Narmin
    Powiązania:
    https://bibliotekanauki.pl/articles/374501.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    signal
    noise analysis
    control
    accident
    correlation matrix
    signaling
    railway
    seismically active regions
    sygnał
    analiza hałasu
    kontrola
    wypadek
    macierz korelacyjna
    sygnalizacja
    kolej
    rejony aktywne sejsmicznie
    Opis:
    On the railroads in seismically active regions, the impact of frequent weak earthquakes accelerates the initiation of defects such as wear and tear, cracks and deformation due to fatigue. An analysis of the types and stages of initiation and development of defects preceding accidents at technical facilities has shown that the registration of the beginning of the latent period of transition of objects to an emergency state based on the results of traditional technologies of analysis of measurement information in the applied control systems in the field of railway transport is delayed owing to the difficulties of noise analysis. The proposed algorithms and noise analysis technologies allow forming corresponding sets of informative attributes to control the beginning of the latent period of accidents. Their use in intelligent noise control systems will improve the safety of this mode of transportation. To this end, it is expedient to create a subsystem for noise seismic hazard warning, i.e., a subsystem for noise control of the onset of the initiation and dynamics of development of changes in the technical condition of the rolling stock, railroad tracks, bridges, tunnels, and other railroad infrastructure facilities.
    Źródło:
    Transport Problems; 2019, 14, 3; 155-162
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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