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Wyszukujesz frazę "Krzyżkowski, J." wg kryterium: Autor

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    Tytuł:
    Spectral analysis of parametric two degrees- of-freedom system
    Autorzy:
    Krzyżkowski, J.
    Pyryev, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/115639.pdf
    Data publikacji:
    2015
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    parametric vibrations
    Hill equation
    TDOF system
    spectral analysis
    drgania parametryczne
    równanie Hilla
    system TDOF
    analiza widmowa
    Opis:
    In this paper model of a vibrating system of two rotating, stressed to each other and periodically losing contact cylinders is presented. The model is described by two-degrees-of-freedom Hill's differential equations system, which was numerically solved. Spectra of the vibrations were analyzed in here.
    Źródło:
    Challenges of Modern Technology; 2015, 6, 4; 9-13
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of vibration of printing unit of offset printing press
    Autorzy:
    Krzyżkowski, J.
    Pyryev, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/115731.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    vibration
    lithographic printing
    offset printing
    offset presses
    printing unit
    plate cylinder
    blanket cylinder
    Opis:
    There are several causes of vibration of off set printing presses. Major are cyclic work of feeders and deliveries, gaps with mechanisms for fixing plate and blanket in cylinders of printing pair and inappropriate stress between those cylinders. All mentioned above causes increased exploitation of bearings, gears driving cylinders and other parts of the printing press. The consequences of vibration are also breaking of paper web and such artefacts as doubling and streaking on the prints. In this paper printing pair cylinders of lithographic printing press are described as a two-degree of freedom model. Solution of a system of differential equations, which describes this model shows influence of vibration of printing unit cylinders on the fluctuation of the ink film thickness on the prints (magnitude of streaking phenomenon).
    Źródło:
    Challenges of Modern Technology; 2011, 2, 2; 31-34
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cylinder Gap Shock and its Impact on Quality of Prints in Offset Printing Technique
    Autorzy:
    Krzyżkowski, J.
    Pyryev, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/115694.pdf
    Data publikacji:
    2013
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    vibrations
    offset printing
    printing machine
    streaking
    drgania
    druk offsetowy
    maszyna drukarska
    smugi
    Opis:
    There are many factors in offset printing technique, which determine the final quality of the printouts. Next to ink, dampening liquid and paper properties, significant role plays here construction of printing unit and its technical condition. Many works, where problem of vibrations was investigated, point canals in plate and blanket cylinders as source of vibrational excitation in printing unit. The canals may generate vibrations of inking and dampening rollers, as well cylinders themselves. If wear of bearings, looseness and unbalance of rotating cylinders and rollers will be additionally taken into account, there may be expected, that excited vibrations will seriously influence on the results obtained during printing process. Some undesired artifacts, for instance, cross stripes may be noticeable on the prints then. The main scope of the researches presented in this paper was to find relation between vibrations in offset printing unit and their influence on quality of the printed image. For this purpose, while printing, measurements of vibrations of printing unit have been made. Afterwards printed test image have been precisely analyzed in search of undesired phenomena, which can be an effect of excessive vibrations in printing unit. Then comparison between position of the artifacts on the prints and the results of vibration measurements has been made. Effects of the experiment are presented in this paper.
    Źródło:
    Challenges of Modern Technology; 2013, 4, 2; 23-30
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction of cylinders in offset printing presses and its vibratory consequences
    Autorzy:
    Krzyżkowski, J.
    Pyryev, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/115943.pdf
    Data publikacji:
    2012
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    offset printing
    printing presses
    parametric vibrations
    model
    Opis:
    Vibrations in offset printing presses are serious problem, which beside influence on machines’ parts, are also source of problems with printing process and achieving prints of right quality. In this paper construction of offset printing unit is presented. Reasons of vibrations and their types in printing units are shortly described. Moreover, this article shows the role, which some of printing unit’s elements play in resisting of vibrations appearance. There is model of printing unit of sheet-fed offset printing machine presented in here. Model is described by the system of differential parametric equations. There were computer simulations realized, that pointed conditions, which should be fulfilled, so the parametric vibrations occurred.
    Źródło:
    Challenges of Modern Technology; 2012, 3, 1; 15-18
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation on lineworks printed with different types of flexographic printing forms for purposes of printed electronics
    Autorzy:
    Krzyżkowski, J.
    Dąbrowa, T.
    Hamerliński, J.
    Śleboda, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/115600.pdf
    Data publikacji:
    2015
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    printed electronics
    flexography
    printing
    drukowanie elektroniczne
    fleksografia
    druk
    Opis:
    Nowadays one can observe fast development of materials and technologies dedicated to inexpensive mass production of electronic devices with conventional printing techniques. One of them is flexography. In this paper investigation on quality of lineworks printed with flexographic printing technique for purposes of printed electronics is presented. There was analysed influence of different printing forms on printed elements reproduction accuracy. Results obtained with conventional graphic ink with commercially available conductive ink were compared as well. Aspects which should be taken under consideration when implementing flexography to printed electronics applications have been specified.
    Źródło:
    Challenges of Modern Technology; 2015, 6, 3; 3-9
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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