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 "deep-penetration" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Analytical Investigation on a New Approach for Achieving Deep Penetration in a Lossy Medium: The Lossy Prism
    Autorzy:
    Frezza, F.
    Simeoni, P.
    Tedeschi, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/308620.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    deep-penetration
    Ground Penetrating Radar
    leakywave antennas
    Opis:
    Recent studies highlighted deep-penetration prop-erties of inhomogeneous waves at the interface between a loss-less and a lossy medium. Such waves can be generated bymeans of radiating structures known as Leaky-Wave Anten-nas (LWAs). Here, a different approach is proposed basedon the use of a lossy prism capable to generate an inhomo-geneous wave when illuminated by a homogeneous wave. Thelossy prism is conceived and designed thinking of Ground-Penetrating Radar (GPR). The results achieved by the lossyprism will be compared with those obtained by means of a pre-viously designed LWA that was created with the identical ob-jective. The approach of this paper is purely theoretical, andit aims at providing basic ideas and preliminary results usefulfor an innovative LWA design.
    Źródło:
    Journal of Telecommunications and Information Technology; 2017, 3; 17-24
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Evaluation of Electromagnetic-wave Penetration at Normal Incidence through an Inhomogeneous-wave Approach
    Autorzy:
    Calcaterra, A.
    Frezza, F.
    Simeoni, P.
    Tedeschi, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/307928.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    deep-penetration
    electromagnetic simulation
    leakywave antennas
    lossy prism
    Opis:
    This paper presents numerical scenarios concerning penetration in a lossy medium that can be obtained by radiating inhomogeneous electromagnetic waves. Former papers approached this problem, both analytically and numerically, finding requirements and limits of the so-called “deeppenetration” condition, which consists of a wave transmitted in a lossy medium having an attenuation vector whose direction forms the angle of ninety degrees with the normal to the separation surface. The deep-penetration condition always requires an oblique incidence, therefore is not practical in many applications. For this reason, we are interested here in finding whether an inhomogeneous wave guarantees larger penetration than the one obtainable with homogeneous waves, even when the incident wave is normal to the separation surface between two media, i.e. when the deep-penetration condition is not satisfied. We are also interested in verifying numerically whether the lossy-prism structure may achieve larger penetration than the one obtainable through traditional leakywave antennas, and we also wish to propose a lossy-prism design more realistic than the one previously presented in the literature.
    Źródło:
    Journal of Telecommunications and Information Technology; 2018, 2; 76-86
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The rational use of welds in steel structures
    Autorzy:
    Kubicki, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/31342638.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    spoina pachwinowa
    spoina czołowa
    proces spawania z głębokim wtopieniem
    fillet weld
    butt weld
    deep-penetration welding process
    Opis:
    The incorrect design or execution of joints contributes to higher costs through material, time and/or energy losses. Choosing the right type of joint, type of weld or manufacturing technology may not only significantly reduce the expenditure, but also considerably increase the design resistance of the joint itself. The paper shows how to use butt and fillet welds more economically.
    Źródło:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym; 2022, 11; 85-92
    2299-8535
    2544-963X
    Pojawia się w:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of tillage alteration on soil water content, maize crop water potential and grain yield under subtropical humid climate conditions
    Autorzy:
    Chen, J.
    He, Y.
    Li, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082993.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil penetration resistance
    occasional deep tillage
    no-till
    seasonal drought
    Opis:
    Seasonal drought stress is common in farmland even under humid climate conditions. Low soil water content and high penetration resistance in clayey soil are both factors that limit crop growth, which is significantly affected by tillage. In a twoyear (2014-2015) field experiment conducted in Hubei, China, the effects of conventional tillage, along with occasional deep tillage and no-till, on the soil water content and penetration resistance values of red soil and on the crop water potentials of the maize crop (Zea mays L.) were tested. Compared to conventional tillage, deep tillage reduced the difference in the soil water characteristic curve between 0-40 cm soil layers, resulting in a more loose and homogeneous topsoil. The deep tillage significantly (p<0.05) decreased soil penetration resistance, increased soil-available water content and soil water content during the dry period, promoted an increase in maize root density by 11.4~31.6%, and increased the water potential of the maize root and leaf during most growth stages. In contrast, the effect of no-till was opposite to that of deep tillage, reducing maize grain yield by 25.3~26.3%. The results confirmed that no-till is not appropriate for the clayey red soil but rather that tillage is needed. This suggests that occasional deep tillage is helpful in mitigating seasonal crop drought stress under the conditions of a humid climate.
    Źródło:
    International Agrophysics; 2021, 35, 1; 1-9
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel deep penetrating eddy current probe based on phase shifted fields and its application to inspection of defects
    Autorzy:
    Wu, Meixian
    Zhang, Dongli
    Wang, Chuanglong
    Powiązania:
    https://bibliotekanauki.pl/articles/221582.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    skin effect
    penetration depth
    austenitic stainless steel
    eddy current probe
    phase shifted fields
    Opis:
    Due to the skin effect of eddy currents, the depth of cracks which can be detected by the traditional eddy current probe is very limited. In order to improve the ability of eddy current probes to inspect deep cracks in metal thick-walled structures, a new eddy current probe using an excitation system with phase shifted fields was proposed. Its feasibility for detecting deep cracks was verified by simulation and experiments. The results showed that the penetration depth of eddy currents in austenitic stainless steel is effectively enhanced by using the new probe.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 2; 275-287
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie badań CPTu do wyznaczania parametrów gruntu w analizie stateczności skarp głębokich wykopów
    Application of CPT in determination of soil parameters in slope stability analysis of deep excavations
    Autorzy:
    Szajna, W. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/372124.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sondowania statyczne CPTU
    obciążenie z drenażem
    parametry efektywne
    stateczność skarp
    Eurokod 7
    wykopy głębokie
    cone penetration tests CPTu
    drained loading
    effective parameters
    slope stability
    Eurocode 7
    Opis:
    W celu sprawdzenia stateczności skarp głębokich wykopów, konieczna jest znajomość efektywnych wartości parametrów mechanicznych podłoża. W pracy przedstawiono możliwości i ograniczenia związane ze stosowaniem badań CPTu do wyznaczania efektywnych wartości parametrów gruntów spoistych i małospoistych.
    The paper presents the problem of determination of soil parameters with the use of Cone Penetration Tests with pore pressure measurement (CPTu). To solve the cut slope stability problem, according to the Eurocode 7, it is required to estimate the values of effective parameters of the subsoil. The determination of these parameters by CPTu is a standard task for granular soil. The paper describes their determination for mixed soils and discusses the advantages and limitations of the used method.
    Źródło:
    Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2010, 139 (19); 93-104
    1895-7323
    Pojawia się w:
    Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      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