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Wyszukujesz frazę "defect characterization" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Characterization of material defects using active thermography and an artificial neural network
    Autorzy:
    Dudzik, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/221055.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    active thermography
    non-destructive testing
    defect characterization
    neural networks
    Opis:
    In the paper a method using active thermography and a neural algorithm for material defect characterization is presented. Experimental investigations are conducted with the stepped heating method, so-called time-resolved infrared radiometry, for the test specimen made of a material with low thermal diffusivity. The results of the experimental investigations were used in simulations of artificial neural networks. Simulations are performed for three datasets representing three stages of the heating process occurring in the investigated sample. In this work, the simulation research aimed to determine the accuracy of defect depth estimation with the use of the mentioned algorithm is descibed.
    Źródło:
    Metrology and Measurement Systems; 2013, 20, 3; 491-500
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of thinning of homogeneous material using active thermography and classification trees
    Autorzy:
    Dudzik, Sebastian
    Dudek, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/1848987.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    active thermography
    classification tree
    defect detection and characterization
    material thinning detection
    Opis:
    Active thermography is an efficient tool for defect detection and characterization as it does not change the properties of tested materials. The detection and characterization process involves heating a sample and then analysing the thermal response. In this paper, a long heating pulse was used on samples with a low thermal diffusivity and artificially created holes of various depths. As a result of the experiments, heating and cooling curves were obtained. These curves, which describe local characteristics of the material, are recognized using a classification tree and divided into categories depending on the material thickness (hole depths). Two advantages of the proposed use of classification trees are: an in-built mechanism for feature selection and a strong reduction in the dimensions of the pattern. Based on the experimental study, it can be concluded that classification trees are a useful tool for the thinning detection of homogeneous material.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 1; 89-105
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Imaging methods of detecting defects in photovoltaic solar cells and modules: a survey
    Autorzy:
    Maziuk, Maurycy
    Jasińska, Laura
    Domaradzki, Jarosław
    Chodasewicz, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/27311747.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    solar cells
    defects
    photovoltaic cell characterization
    defect imaging
    electroluminescence
    photoluminescence
    Opis:
    In pursuit of increased efficiency and longer operating times of photovoltaic systems, one may encounter numerous difficulties in the form of defects that occur in both individual solar cells and whole modules. The causes of the occurrence range from structural defects to damage during assembly or, finally, wear and tear of the material due to operation. This article provides an overview of modern imaging methods used to detect various types of defects found in photovoltaic cells and panels. The first part reviews typical defects. The second part of the paper reviews imaging methods with examples of the authors’ own test results. The article concludes with recommendations and tables that provide a kind of comprehensive guide to the methods described, depending on the type of defects detected, the range of applicability, etc. The authors also shared their speculations on current trends and the possible path for further development and research in the field of solar cell defect analysis using imaging.
    Źródło:
    Metrology and Measurement Systems; 2023, 30, 3; 381--401
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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