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    Wyświetlanie 1-7 z 7
    Tytuł:
    Evaluation of RTKLIBs Positioning Accuracy Usingn low-cost GNSS Receiver and ASG-EUPOS
    Autorzy:
    Wiśniewski, B.
    Bruniecki, K.
    Moszyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/117289.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Differential GPS (DGPS)
    real time kinematic
    postprocessing
    Opis:
    The paper focuses on a comparison of different positioning methods provided by free and open source software (FOSS) package called RTKLIB. The RTKLIB supports real‐time and post‐processed positioning. The most important modes of operation tested by the authors are Kinematic, Static, Fixed and Precise Point Positioning (PPP). The data for evaluation were obtained from low‐cost Global Navigation Satellite System (GNSS) receiver. The tested receiver was based on the u‐bloxʹs LEA‐6T GNSS module. This receiver provides different types of information including raw carrier phase measurements. It gives the possibility for centimeter‐level precision of positioning. As the supporting source of data ASG‐EUPOS system was used. ASG‐EUPOS is a Polish network of GNSS reference stations providing the real‐time corrections and post processing services for the entire territory of Poland.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 1; 79-85
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rotary Head Kinematics During Cleaning of Flat Surfaces
    Autorzy:
    Chomka, G.
    Chudy, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/386999.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    głowica obrotowa
    oczyszczanie
    rotary head
    prolate cycloid
    cleaning
    postprocessing traces
    Opis:
    The present article covers the problem of a mathematical description of the trajectory of those postprocessing traces that occur in the process of hydro jet cleaning of flat surfaces with the use of a rotary head. An analysis was conducted of postprocessing traces taking into consideration the provision of their uniform distribution. The determination of the conditions of an effective cleaning will allow such a selection of the working parameters of the head when a surface is obtained of a high quality, i.e. with a uniform degree of the removal of impurities.
    Źródło:
    Acta Mechanica et Automatica; 2012, 6, 3; 19-26
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The numerical analysis of selected defects in forging processes
    Numeryczna analiza wybranych defektów w procesach kucia
    Autorzy:
    Łukaszek-Sołek, Aneta
    Bednarek, Sylwia
    Lisiecki, Łukasz
    Skubisz, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/29520316.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    numerical modelling
    forging
    defect
    postprocessing subroutine
    modelowanie numeryczne
    kucie
    wada
    Opis:
    Technological development and growing performance expectations these days force quality attitude from the forging industry, which needs to be implemented at the very initial stage of design. Tendency of weight reduction calling for high-strength steels and near-net forging results in sophisticated geometries to be forged under severe work conditions producing low workability. One of the cost-effective contemporary tool to support the design of forging technology is numerical modeling. State of art in computer codes for prediction of the metal behavior during deformation gives high credits to computer simulation, which allows significant reduction of research and development costs. On the other hand, the method prevailing in this field, finite element method (FEM) has some limitations, for instance, the results are indirectly applicable as some of the defects can only be recognized by use of auxiliary criteria for interpretation of the simulation results.
    Wysokie wymagania stawiane przez klientów oraz potrzeba obniżenia kosztów produkcji przy jednoczesnym zachowaniu wysokiej jakości produktów powodują konieczność uwzględnienia specjalnych modeli i kryteriów w analizie numerycznej procesów kucia. Najnowsze podejścia oferowane przez producentów komercyjnego oprogramowania nie obejmują kompleksowej analizy wad. W wielu przypadkach konieczne jest uwzględnienie podprogramów stworzonych przez użytkownika i poświęconych konkretnym operacjom kucia. Interdyscyplinarna wiedza pozwala wybrać odpowiednią technikę prognozowania defektów typową dla analizowanego procesu kucia. Głównym celem artykułu przeglądowego jest pokazanie najnowszych narzędzi, ich modyfikacji i rozszerzeń do przewidywania defektów często obserwowanych w procesie przemysłowym kucia z wykorzystaniem modelowania MES. Metodologia badań polegała na połączeniu modelowania numerycznego, testów laboratoryjnych i analizy procesów przemysłowych.
    Źródło:
    Computer Methods in Materials Science; 2019, 19, 3; 89-99
    2720-4081
    2720-3948
    Pojawia się w:
    Computer Methods in Materials Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The testing of PCL: an open-source library for point cloud processing
    Autorzy:
    Zygmunt, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/100450.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
    Tematy:
    terrestrial laser scanning
    postprocessing
    Point Cloud Library
    algorithm
    naziemny skaning laserowy
    Opis:
    In the era of the rapid development of the terrestrial laser scanning technology (TLS), that facilitates the acquisition of large data volumes in the form of three-dimensional point clouds, a need arises to create modern solutions to enable effective and efficient data processing. This paper presents the PCL (Point Cloud Library). This is an Open Source project that contains many of the key algorithms for TLS data, designed for filtering, registration, estimation of function, surface reconstruction, modeling and segmentation, as well as structures for identifying and matching objects. The article discusses the structure of the project as well as its most useful modules from the point of view of the TLS data processing. It describes the format used by the PCL data storage. Also, a practical example is enclosed, as a basis for the discussion of consecutive steps of working with the library, from recording input data in the correct format to visualization of the effects of the used algorithm.
    Źródło:
    Geomatics, Landmanagement and Landscape; 2013, 3; 105-115
    2300-1496
    Pojawia się w:
    Geomatics, Landmanagement and Landscape
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pulmonary embolism - angioct (CTA) assessment of vascular occlusion extent and localization of emboli
    Autorzy:
    Ptak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/333915.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    zator tętnicy płucnej
    angiokardiogram
    techniki przetwarzania końcowego
    wynik Mastora
    pulmonary embolism
    angioCT
    postprocessing techniques
    Mastora score
    Opis:
    Pulmonary embolism (PE) is caused by occlusion of the pulmonary artery or its branches. CTA is a "gold standard" for the diagnosis and extent determination of PE. The etiology of embolic material may influence the extent and localization of embolism. The CTA assessment of influence of PE etiology on extent of vascular occlusion and clot localization. The study group consisted of 24 patients divided into two subgroups (15 patients with deep venous thrombosis - DVT and 9 patients with heart failure/chronic obstructive pulmonary disease - HF/COPD; respectively group A and group B) were taken into consideration. The location of clots and an average percentage of vascular stenosis in CTA were analysed in these two subgroups. The mean percentage of vessel occlusion was 20,49% vs. 14,22% respectively in group A vs. group B. Bilateral occlusion of vessels was more frequent in group A and unilateral in group B. DVT may predispose to bilateral occlusion and more severe vessels obstruction.
    Źródło:
    Journal of Medical Informatics & Technologies; 2007, 11; 335-340
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical and applied research in the field of higher geodesy conducted in Rzeszow
    Autorzy:
    Kadaj, R.
    Świętoń, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/106853.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    automatic postprocessing
    combined geodetic network
    empirical reduction of observations
    empirical transformation on a grid
    przetwarzanie automatyczne
    sieć geodezyjna
    redukcja obserwacji
    transformacja siatki
    Opis:
    Important qualitative changes were taking place in Polish geodesy in last few years. It was related to application of new techniques and technologies and to introduction of European reference frames in Poland. New reference stations network ASG-EUPOS, together with Internet services which helps in precise positioning was created. It allows to fast setting up precise hybrid networks. New, accurate satellite networks became the basis of new definitions in the field of reference systems. Simultaneously arise the need of new software, which enables to execute the geodetic works in new technical conditions. Authors had an opportunity to participate in mentioned undertakings, also under the aegis of GUGiK, by creation of methods, algorithms and necessary software tools. In this way the automatic postprocessing module (APPS) in POZGEO service, a part of ASG-EUPOS system came into being. It is an entirely polish product which works in Trimble environment. Universal software for transformation between PLETRF89, PL-ETRF2000, PULKOWO’42 reference systems as well as defined coordinate systems was created (TRANSPOL v. 2.06) and published as open product. An essential functional element of the program is the quasi-geoid model PL-geoid-2011, which has been elaborated by adjustment (calibration) of the global quasi-geoid model EGM2008 to 570 geodetic points (satellite-leveling points). Those and other studies are briefly described in this paper.
    Źródło:
    Reports on Geodesy and Geoinformatics; 2016, 100; 79-100
    2391-8365
    2391-8152
    Pojawia się w:
    Reports on Geodesy and Geoinformatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-dimensional CT volume rendering technique - orthopedists "second imagination"
    Autorzy:
    Ptak, D.
    Stróżyński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/333393.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    urazy dziecięce
    złamania kości
    diagnostyka obrazowa
    rentgen
    tomografia komputerowa
    children’s trauma
    bone fractures diagnostic imaging
    X-ray
    CT postprocessing techniques
    3D VRT
    Opis:
    Bone fractures in children's traumas are enormous problem not only from psychological point of view but in these cases the diagnostic issue is much more relevant. The correct diagnosis leads to proper treatment and reduces the risk of adverse effects. For this reason, plain radiography is not the only step in diagnostic procedure and is often combined with Computed Tomography (CT) and sometimes with Magnetic Resonance (MR). The aim of the study was to assess a contribution of three dimensional volume rendering (3D VRT) images on the diagnosis and the possible qualification to the surgical treatment. The study was performed on 21 patients (12 boys, 9 girls) hospitalized at Pediatric Surgery Department in Sosnowiec from January 2007 to April 2008. All of the patients underwent plain radiography as the first diagnostic step and had CT as an additional imaging procedure. A total number of fractures were 28 vs. 32, respectively diagnosed on X-ray and CT scans. The necessity of surgical reposition was present in 8 patients. Spiral CT and its postprocessing technique 3D VRT play major role in musculoskeletal trauma. They bring particular importance in fracture detailed estimating and any multiorgan injuries. However, the need of performing CT should be limited to uncertain cases and before operation planning because of higher radiation dose.
    Źródło:
    Journal of Medical Informatics & Technologies; 2008, 12; 251-255
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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