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    Wyświetlanie 1-8 z 8
    Tytuł:
    Kształtowanie się właściwości fizycznych gleby pod wpływem zróżnicowanych systemów uprawy buraka cukrowego
    Formation of soil physical properties under the influence of cultivation system of sugar beet
    Autorzy:
    Kuc, P.
    Zimny, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/9234356.pdf
    Data publikacji:
    2004
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    miedzyplony scierniskowe
    wilgotnosc gleby
    zwiezlosc gleb
    porowatosc kapilarna
    gleby
    buraki cukrowe
    wlasciwosci fizyczne
    systemy uprawy
    zapas wody w gruncie
    uprawa roslin
    miedzyplony
    nawozenie
    porowatosc ogolna
    gestosc objetosciowa
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2004, 59, 3; 1129-1138
    0365-1118
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koaksjalny magnetokumulacyjny generator prądu
    Coaxial magnetocumulative power generator
    Autorzy:
    Wołoszyn, M.
    Jakubiuk, K.
    Zimny, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/378119.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    magnetokumulacja
    generator prądu
    detonacja
    Opis:
    W pracy przedstawiono wyniki symulacji komputerowej koaksjalnego magnetokumulacyjnego generatora prądu (MGP). Badania symulacyjne przeprowadzono dla różnych wartości średnicy wewnętrznej, długości i prędkości odkształcania elementu MGP.
    The results of computer simulation of the coaxial magnetocumulative current generator (MGP) were presented in this paper. The simulation tests were carried out for different values of internal diameter, length and speed of the deformation of an MGP element.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 85; 53-59
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Masking of ferromagnetic ellipsoidal shell in Earth’s magnetic field
    Autorzy:
    Jakubiuk, K.
    Wołoszyn, M.
    Zimny, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/97594.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    mathematical models of magnetic field
    magnetization of ferromagnetic object
    masking of ferromagnetic object
    windings for demagnetization of the ship
    Opis:
    A ferromagnetic object, located in the Earth’s magnetic field, changes the distribution of that field. By measuring such disturbances it is possible to detect the object and destroy it. To conceal the object, a special winding is placed inside its ferromagnetic shell, which function is to eliminate the disturbances in the distribution of the Earth’s magnetic field. A thin walled ellipsoidal shell made of ferromagnetic material are examined as the object model. Coils are placed inside the shell and their function is to generate a magnetic field, which eliminates the effect the shell makes on the distribution of the Earth’s magnetic field in the surrounding area. Such a procedure is called magnetic masking and the winding used for this purpose is called the masking winding. The possibility of building the masking windings for the ferromagnetic ellipsoidal shell, situated in a magnetic field transverse in relation to its major axis, is also examined. Masking of a thin-walled ellipsoidal ferromagnetic object located in the longitudinal magnetic field is described in the article [1]. Investigating the possibility of masking of objects in a transverse magnetic field presented in this article will allow for a comprehensive assessment of a possibility of masking thin walled ferromagnetic objects of elongated ellipsoidal shape. The solution of Maxwell’s equations, which describe the magnetic field distribution caused by the ferromagnetic shell presence in the Earth’s magnetic field, are applied. Furthermore, the ability of selecting coils, which fully eliminate the perturbations of the magnetic field outside the shell are proven.
    Źródło:
    Computer Applications in Electrical Engineering; 2013, 11; 92-99
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multisource model of ship electric field
    Autorzy:
    Jakubiuk, K.
    Zimny, P.
    Wołoszyn, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/97439.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    magnetic field of the ship
    mine protection
    BEM
    Opis:
    A steel-hulled ship in sea water produces an electric field around itself. The source of this field are electrochemical processes and ship’s cathodic protection. The analysis of the electric field around the ship is important by the reason of the ship’s identification and counter-mine protection. The paper presents a simplified model of the ship’s multisource electric field, which allows to calculate the electric field distribution in the so-called distant zone around the ship in an approximate way using a PC, during time lasting from few up to several dozen of minutes.
    Źródło:
    Computer Applications in Electrical Engineering; 2011, 9; 78-84
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perturbation analysis of electric field around objects in sea water
    Autorzy:
    Jakubiuk, K.
    Zimny, P.
    Wołoszyn, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/377479.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    electric field
    object in sea water
    location methods
    electric perturbations
    Opis:
    In marine environment there are different types of objects, such as ships or naval mines, which should be located and identified. One of the location methods is based on the electric potential distribution measurement [1, 2], The object with an insulating or conductive casing, placed in an electric field, causes some field perturbations. For the purpose of the object location the dimensions of the area, where it is possible to determine electric field perturbations by measurement, are important. In this way one can pre-determine the extent of the system for locating and identifying objects placed in the seawater. This paper presents an analytical approach to the perturbation analysis of electric field distribution caused by a sphere and an ellipsoid placed in a uniform electric field. The distance, beyond which the uniform electric perturbations can be neglected, is determined.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2012, 69; 81-88
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Making of ferromagnetic elliptical shell in transverse magnetic field
    Autorzy:
    Jakubiuk, K.
    Wołoszyn, M.
    Zimny, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/377889.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    ferromagnetic object
    magnetic field
    ferromagnetic shell
    Opis:
    A ferromagnetic object, located in the Earth’s magnetic field, changes its distribution. Through measuring such disturbances, one can locate the object and destroy it. To conceal the object, a special winding is placed inside its ferromagnetic shell, and its task is to eliminate the disturbances in the distribution of the Earth’s magnetic field. A thin walled elliptical shell, made of ferromagnetic material, is examined as the object model. There are coils, placed inside the shell, and their task is to generate a magnetic field, which is eliminating the effect, the shell is making on the distribution of the Earth’s magnetic field in the surrounding area. Such a procedure is called magnetic masking and the winding used for this purpose is called the masking winding. The possibility of building the masking windings for the ferromagnetic elliptical shell, situated in a transverse magnetic field respectively to its major axis, is also examined. The solution of Maxwell’s equations, which are describing the magnetic field distribution caused by the ferromagnetic shell presence in the Earth’s magnetic field, is found. Furthermore, the ability of selecting coils, which are eliminating the perturbations of the magnetic field outside the shell completely, is proven.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 73; 131-136
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The method of location and identification of weak electric field source in seawater
    Autorzy:
    Jakubiuk, K.
    Zimny, P.
    Wołoszyn, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/376626.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    electric field
    object location
    object identification
    seawater
    Opis:
    There are electrochemical processes occurring on a metal object surface in seawater. As the result of these processes, one can observe an electric field in the object vicinity. The paper presents the method and measurement system that allows to locate the detected object and to identify parameters of its simplified model in form of a current dipole. The identify method is based on the matrix norm minimization. The matrix contains results of measurements and parameters of the object in request taken as the current dipole. The results of simulation and experimental detection of sea mines are given. The research results confirmed the effectiveness of the developed method.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2012, 69; 103-109
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of coaxial magnetocumulative generators
    Autorzy:
    Wołoszyn, M.
    Jakubiuk, K.
    Zimny, P.
    Kowalak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/141467.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    coaxial generator
    magnetic field
    magnetocumulative generator
    Opis:
    This paper presents the results of a computer simulation of coaxial magnetocumulative current generators (MCGs). The simulation tests were carried out for different values of the internal diameter, length and speed of the deformation of the MGP element.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 4; 681-692
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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