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  1. Article ; Online: Estimation and Prediction of Vertical Deformations of Random Surfaces, Applying the Total Least Squares Collocation Method.

    Wiśniewski, Zbigniew / Kamiński, Waldemar

    Sensors (Basel, Switzerland)

    2020  Volume 20, Issue 14

    Abstract: This paper proposes a method for determining the vertical deformations treated as random fields. It is assumed that the monitored surfaces are subject not only to deterministic deformations, but also to random fluctuations. Furthermore, the existence of ... ...

    Abstract This paper proposes a method for determining the vertical deformations treated as random fields. It is assumed that the monitored surfaces are subject not only to deterministic deformations, but also to random fluctuations. Furthermore, the existence of random noise coming from surface's vibrations is also assumed. Such noise disturbs the deformation's functional models. Surface monitoring with the use of the geodetic levelling network of a free control network class is carried out. Assuming that, in some cases, the control networks are insufficient in surface's deformation analysis, additional and non-measurable reference points have been provided. The prediction of these points' displacements and estimation of the free control network points' displacement are carried out using the collocation method applying the total least squares adjustment. The proposed theoretical solutions were verified by the simulation methods and on the example of a real control network.
    Language English
    Publishing date 2020-07-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s20143913
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Efficacy of M

    Wiśniewski, Zbigniew / Duchnowski, Robert / Dumalski, Andrzej

    Sensors (Basel, Switzerland)

    2019  Volume 19, Issue 22

    Abstract: Sets of geodetic observations often contain groups of observations that differ from each other in the functional model (or at least in the values of its parameters). Sets of observations obtained at various measurement epochs is a practical example in ... ...

    Abstract Sets of geodetic observations often contain groups of observations that differ from each other in the functional model (or at least in the values of its parameters). Sets of observations obtained at various measurement epochs is a practical example in such a context. From the conventional point of view, for example, in the least squares estimation, subsets in question should be separated before the parameter estimation. Another option would be application of M
    Language English
    Publishing date 2019-11-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s19225047
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Book: Wdrażanie zmian w organizacji

    Wiśniewski, Zbigniew

    uje̜cie dynamiczne

    (Rozprawy naukowe / Politechnika Łódzka ; 395 ; Zeszyty naukowe / Politechnika Łódzka ; 1070)

    2010  

    Author's details Zbigniew Wiśniewski
    Series title Rozprawy naukowe / Politechnika Łódzka ; 395
    Zeszyty naukowe / Politechnika Łódzka ; 1070
    Language Polish
    Size 589 S., graph. Darst.
    Publisher Wydawn. Politechn
    Publishing place Łódź
    Document type Book
    Note Literaturverz. S. 573 - 587
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  4. Article ; Online: Application of Least Squares with Conditional Equations Method for Railway Track Inventory Using GNSS Observations.

    Czaplewski, Krzysztof / Wisniewski, Zbigniew / Specht, Cezary / Wilk, Andrzej / Koc, Wladyslaw / Karwowski, Krzysztof / Skibicki, Jacek / Dabrowski, Paweł / Czaplewski, Bartosz / Specht, Mariusz / Chrostowski, Piotr / Szmaglinski, Jacek / Judek, Slawomir / Grulkowski, Slawomir / Licow, Roksana

    Sensors (Basel, Switzerland)

    2020  Volume 20, Issue 17

    Abstract: Satellite geodetic networks are commonly used in surveying tasks, but they can also be used in mobile surveys. Mobile satellite surveys can be used for trackage inventory, diagnostics and design. The combination of modern technological solutions with the ...

    Abstract Satellite geodetic networks are commonly used in surveying tasks, but they can also be used in mobile surveys. Mobile satellite surveys can be used for trackage inventory, diagnostics and design. The combination of modern technological solutions with the adaptation of research methods known in other fields of science offers an opportunity to acquire highly accurate solutions for railway track inventory. This article presents the effects of work carried out using a mobile surveying platform on which Global Navigation Satellite System (GNSS) receivers were mounted. The satellite observations (surveys) obtained were aligned using one of the methods known from classical land surveying. The records obtained during the surveying campaign on a 246th km railway track section were subjected to alignment. This article provides a description of the surveying campaign necessary to obtain measurement data and a theoretical description of the method employed to align observation results as well as their visualisation.
    Language English
    Publishing date 2020-09-01
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s20174948
    Database MEDical Literature Analysis and Retrieval System OnLINE

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