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    Wyświetlanie 1-14 z 14
    Tytuł:
    Radar measures of structures’ conformability
    Autorzy:
    Binderman, Zbigniew
    Borkowski, Bolesław
    Szczesny, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/452756.pdf
    Data publikacji:
    2010
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    radar method
    radar measure of conformability
    measure of similarity
    synthetic measures
    classification
    cluster analysis
    Opis:
    In the following work a new method was proposed to study similarity of objects’ structures. This method is an adaptation of radar methods of objects’ ordering and cluster analysis, which are being developed by the authors. The value added by the authors is the construction of measures for conformability of structures of two objects. Those measures may also be used to define similarities between given objects. Proposed measures are independent of the order of features.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2010, 11, 1; 45-59
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An application of radar charts to geometrical measures of structures’ of conformability
    Autorzy:
    Binderman, Zbigniew
    Borkowski, Bolesław
    Szczesny, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/453247.pdf
    Data publikacji:
    2011
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    radar method
    radar measure of conformability
    Dice’s Jaccard’s measure of similarity
    synthetic measures
    classification
    cluster analysis
    Opis:
    In the following work we presented a method of using radar charts to calculate measures of conformability of two objects according to formulasgiven by, among others, Dice, Jaccard, Tanimoto and Tversky. This method incorporates another one presented by the authors of this study [Binderman, Borkowski, Szczesny 2010]. Presented methods can be also utilized to define similarities between given objects, as well as to order and group objects. Measures described in this work satisfy the condition of stability as they do not depend on the order of studied features.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2011, 12, 1; 1-14
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radar coefficient of concentration
    Autorzy:
    Binderman, Zbigniew
    Borkowski, Bolesław
    Szczesny, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/453724.pdf
    Data publikacji:
    2012
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    Gini index
    Schutz’s measure
    radar coefficient of concentration
    radar method
    radar measure of conformability
    measure of similarity
    synthetic measures
    classification
    cluster analysis
    Opis:
    In the following work we have described a process of using radar charts to measure concentration of a distribution. The process utilises the idea of Gini index based on a Lorenz curve as well as a method presented by the authors in [Binderman, Borkowski, Szczesny 2010]. The presented technique can also be used by analysts to create new coefficients of concentration based on measures of similarity and dissimilarity of objects so that from the set of constructed coefficients one that best fulfils the required criteria of sensitivity can be chosen.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2012, 13, 2; 7-21
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical modeling of GPR field in damage detection of a reinforced concrete footbridge
    Numeryczne modelowanie pola georadarowego w detekcji uszkodzeń żelbetowej kładki dla pieszych
    Autorzy:
    Lachowicz, J.
    Rucka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1396902.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    damage detection
    ground penetrating radar method
    FDTD simulation
    wykrywanie uszkodzeń
    metoda georadarowa
    obliczenia
    metoda różnic skończonych
    Opis:
    The paper presents a study on the use of the ground penetrating radar (GPR) method in diagnostics of a footbridge. It contains experimental investigations and numerical analyses of the electromagnetic field propagation using the finite difference time domain method (FDTD). The object of research was a reinforced concrete footbridge over a railway line. The calculations of the GPR field propagation were performed on a selected cross-section of the bridge. Three different damage scenarios (i.e. one missing rebar and two air voids with different shapes and locations) were investigated in FDTD simulations. Numerical GPR maps were compared with results of in-situ GPR surveys for the healthy footbridge.
    W artykule przedstawiono użycie metody georadarowej w procesie diagnostyki kładki dla pieszych. Praca zawiera badania doświadczalne oraz analizy numeryczne propagacji pola elektromagnetycznego z wykorzystaniem metody różnic skończonych w dziedzinie czasu. Przedmiotem badań była żelbetowa kładka dla pieszych usytuowana nad torami kolejowymi. Obliczenia wykonano na przykładzie wybranego przekroju poprzecznego kładki. Rozważono trzy różne scenariusze uszkodzeń, tj. brak jednego z prętów zbrojeniowych oraz dwie pustki powietrzne o różnych kształtach i lokalizacjach. Wyniki symulacji porównano z wynikami badań doświadczalnych przeprowadzonych na nowo wybudowanym obiekcie.
    Źródło:
    Diagnostyka; 2016, 17, 2; 3-8
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of geophysical surveys in the identification of water escape zones from retention lakes: a case study on a selected object in Upper Silesia
    Autorzy:
    Mieszkowski, Radosław
    Wójcik, Emilia
    Kozłowski, Mikołaj
    Popielski, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/2025248.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ground penetrating radar (GPR) method
    electrical resistivity tomography (ERT) method
    retention lake
    water reservoir
    Opis:
    The main scientific goal of this work is the presentation of the role of selected geophysical methods (Ground-Penetrating Radar GPR and Electrical Resistivity Tomography ERT) to identify water escape zones from retention reservoirs. The paper proposes a methodology of geophysical investigations for the identification of water escape zones from a retention fresh water lake (low mineralised water). The study was performed in a lake reservoir in Upper Silesia. Since a number of years the administrators of the lake have observed a decreasing water level, a phenomenon that is not related to the exploitation of the object. The analysed retention lake has a maximal depth between 6 and 10 m, depending on the season. It is located on Triassic carbonate rocks of the Muschelkalk facies. Geophysical surveys included measurements on the water surface using ground penetration radar (GPR) and electrical resistivity tomography (ERT) methods. The measurements were performed from watercrafts made of non-metal materials. The prospection reached a depth of about 1 to 5 m below the reservoir bottom. Due to large difficulties of conducting investigations in the lake, a fragment with an area of about 5,300 m2, where service activities and sealing works were already commenced, was selected for the geophysical survey. The scope of this work was: (1) field geophysical research (Ground-Penetrating Radar GPR and Electrical Resistivity Tomography ERT with geodesic service), (2) processing of the obtained geophysical research results, (3) modelling of GPR and ERT anomalies on a fractured water reservoir bottom, and (4) interpretation of the obtained results based on the modelled geophysical anomalies. The geophysical surveys allowed for distinguishing a zone with anomalous physical parameters in the area of the analysed part of the retention lake. ERT surveys have shown that the water escape zone from the reservoir was characterised by significantly decreased electrical resistivities. Diffraction hyperboles and a zone of wave attenuation were observed on the GPR images in the lake bottom within the water escape zone indicating cracks in the bottom of the water reservoir. The proposed methodology of geophysical surveys seems effective in solving untypical issues such as measurements on the water surface.
    Źródło:
    Studia Quaternaria; 2018, 35; 121-129
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of GPR method in diagnostics of reinforced concrete structures
    Zastosowanie metody georadarowej w diagnostyce konstrukcji żelbetowych
    Autorzy:
    Lachowicz, J.
    Rucka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/327166.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    non-destructive diagnostics
    electromagnetic waves
    ground penetrating radar method
    experimental investigations
    reinforced concrete structures
    diagnostyka nieniszcząca
    fale elektromagnetyczne
    metoda georadarowa
    badanie doświadczalne
    konstrukcje żelbetowe
    Opis:
    This paper presents an application of the ground penetration method (GPR) for diagnostics of reinforced concrete structures. In situ measurements were conducted for three civil engineering structures: the ground floor structure, the abutment of the railway viaduct and the concrete well. The dual polarized ground penetrating radar with the antenna operating at a center frequency of 2 GHz was used for GPR surveys. Three different methodologies of measurements were analyzed. The results showed that the GPR method enables quick and efficient diagnostics of concrete structures. Based on GPR results it is possible to identify the distribution and amount of reinforcement, as well as the thickness of the concrete layer.
    W artykule przedstawiono zastosowanie metody georadarowej do diagnostyki konstrukcji żelbetowych. Pomiary polowe przeprowadzono na trzech obiektach inżynierskich: konstrukcji podłogi posadowionej na gruncie, przyczółku wiaduktu kolejowego oraz rurze betonowej. Badania doświadczalne wykonano za pomocą georadaru z anteną bipolarna o częstotliwości 2 GHz. W pracy przedstawiono trzy typy metodologii pomiarów georadarowych. Przeprowadzone testy wykazały, że metoda georadarowa umożliwia szybką i wydajną diagnostykę konstrukcji żelbetowych. Na podstawie uzyskanych wyników badań była możliwa identyfikacja rozkładu i ilości zbrojenia, a także grubości warstw betonu.
    Źródło:
    Diagnostyka; 2015, 16, 2; 31-36
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sales channels selection for small industrial enterprises based on qualitative-quantitative characteristic criteria
    Autorzy:
    Shpak, N.
    Kyrylych, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/411323.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Oddział w Lublinie PAN
    Tematy:
    small industrial enterprise
    sales channel
    characteristic criterion
    method of radar
    weight function
    sales channels selection
    Opis:
    In the article, the qualitative and quantitative criteria to compare and evaluate separately direct and indirect sales channels for small industrial enterprises are systemized; the diagnostics of such channels is carried out for concrete enterprise, the application of graphical radar method for comparative analysis is substantiated, the use of the radar method is improved taking into account the weight function of characteristic criteria, the mechanism of diversification of sales channels for a small industrial enterprise is proposed.
    Źródło:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2013, 2, 4; 79-88
    2084-5715
    Pojawia się w:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of the sea surface currents by two-polarization X-band radar IKI-2
    Autorzy:
    Kravtsov, Yu.A.
    Raev, M. D.
    Skvortsov, E. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/359107.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    observation method
    radar signals
    accuracy
    Opis:
    New two-stage method for observation and processing of radar signals and images is suggested, which uses two-polarization X-band radar and significantly improve accuracy of sea surface current velocity measurement.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 1; 26-28
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal Method for Polarization Selection of Stationary Objects Against the Background of the Earth’s Surface
    Autorzy:
    Volosyuk, Valerii
    Zhyla, Simeon
    Pavlikov, Vladimir
    Ruzhentsev, Nikolay
    Tserne, Eduard
    Popov, Anatoliy
    Shmatko, Oleksandr
    Dergachov, Kostiantyn
    Havrylenko, Olena
    Ostroumov, Ivan
    Kuzmenko, Nataliia
    Sushchenko, Olga
    Averyanova, Yuliya
    Zaliskyi, Maksym
    Solomentsev, Oleksandr
    Kuznetsov, Borys
    Nikitina, Tatyana
    Powiązania:
    https://bibliotekanauki.pl/articles/2055248.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    polarimetric radar
    polarization selection
    power lines detection
    multichannel processing
    maximum likelihood method
    Opis:
    Within the maximum likelihood method an optimal algorithm for polarization target selection against the background of interfering signal reflected from the earth’s surface is synthesized. The algorithm contains joint operations of spectral interference rejection and their polarization compensation by means of certain combinations of interchannel subtraction of signals of different polarizations. The physical features of the elements of the polarization scattering matrix are investigated for the technical implementation of the synthesized algorithm.
    Źródło:
    International Journal of Electronics and Telecommunications; 2022, 68, 1; 83--89
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An improved Otsu method for oil spill detection from SAR images
    Autorzy:
    Yu, F.
    Sun, W.
    Li, J.
    Zhao, Y.
    Zhang, Y.
    Chen, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/47553.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    remote sensing
    oil spill
    detection
    Otsu's method
    accident
    marine transport
    synthetic aperture radar
    Opis:
    In recent years, oil spill accidents have become increasingly frequent due to the development of marine transportation and massive oil exploitation. At present, satellite remote sensing is the principal method used to monitor oil spills. Extracting the locations and extent of oil spill spots accurately in remote sensing images reaps significant benefits in terms of risk assessment and clean-up work. Nowadays the method of edge detection combined with threshold segmenta- tion (EDCTS) to extract oil information is becoming increasingly popular. However, the current method has some limitations in terms of accurately extracting oil spills in synthetic aperture radar (SAR) images, where heterogeneous background noise exists. In this study, we propose an adaptive mechanism based on Otsu method, which applies region growing combined with both edge detection and threshold segmentation (RGEDOM) to extract oil spills. Remote sensing images from the Bohai Sea on June 11, 2011 and the Gulf of Dalian on July 17, 2010 are utilized to validate the accuracy of our algorithm and the reliability of extraction results. In addition, results according to EDCTS are used as a comparator to further explore validity. The comparison with results according to EDCTS using the same dataset demonstrates that the proposed self-adapting algorithm is more robust and boasts high-accuracy. The accuracy computing by the adaptive algorithm is significantly improved compared with EDCTS and threshold method.
    Źródło:
    Oceanologia; 2017, 59, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Development of Iteration Method for Optimization of Pair "Signal-filter"
    Autorzy:
    Koshevyy, V.M.
    Gorishna, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/116953.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    iteration method for optimization
    iteration method
    method for optimization
    Matlab
    radar signals
    signal-to-noise ratio
    signal processing
    pair signal-filter
    Opis:
    This paper is devoted to the improvement of the working methods of the "signal-filter" pair using an iterative procedure to maximize the signal-to-noise ratio, namely, to highlight the useful signals to provide information about the environment during the adaptive radar sensing in the conditions of obstacles. An algorithm for determining the optimal filter for suppressing undesired side lobes is proposed, which allows improving the process of detection and identification the target objects. Qualitative characteristics and the stages of space-time signal processing in the radar were justified under correlation conditions (ССF) between the received and expected signals. The using of probing radar signals, shortened in their duration were proposed in order to reduce the power of reflections from the underlying surface and increase the contrast of the radar image. A simulation test of the developed methodology was carried out in order to confirm the reliability of the proposed algebraic expressions using a mathematical model implemented in the Matlab programming environment, and a conclusion is drawn about the practical quality of the technical solutions developed on the basis of the iteration method.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 541-544
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Agricultural Tile Drainage Detection within the Year Using Ground Penetrating Radar
    Autorzy:
    Karásek, Petr
    Nováková, Eva
    Powiązania:
    https://bibliotekanauki.pl/articles/123157.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    tile drainage detection
    tile drain
    ground penetrating radar
    GPR
    geophysical method
    soil amelioration
    Opis:
    The aim of this study was to identify the tile drainage systems within the year (from spring to autumn) using the ground penetrating radar (GPR) geophysical method. The measurements were performed in the experimental locality Dehtáře in the Bohemo-Moravian Highland (Czech Republic) in the years 2016 and 2017. The profiles located in the drained area were repeatedly measured together with the drainage discharges, soil moisture and groundwater level. The best visibility of tile drains was observed during snowmelt (in March and April) when the drainage discharges usually reach their maximum. In other months, the visibility of the drains was variable, but mostly worse. For a reliable detection of individual drains, the measurements above the drainage must be performed in several profiles. Under the conditions of the Czech Republic, the best results were obtained by a 500 MHz frequency antenna.
    Źródło:
    Journal of Ecological Engineering; 2020, 21, 4; 203-211
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An integrated geoarchaeological approach to late Iron Age settlement at Kaštelina hillfort (Lopar, Island of Rab, Croatia) using Amplitude Data Comparison (ADC) method and trial excavation
    Autorzy:
    Androić Gračanin, Paula
    Welc, Fabian
    Konestra, Ana
    Nowacki, Bartosz
    Powiązania:
    https://bibliotekanauki.pl/articles/1634067.pdf
    Data publikacji:
    2020-12-19
    Wydawca:
    Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
    Tematy:
    Northeast Adriatic
    hillfort settlement
    Late Iron Age building structures
    geophysical survey
    Amplitude Data Comparison (ADC) method
    archaeological excavation
    ground penetrating radar
    magnetometry
    multidisciplinary research
    Opis:
    Geophysical prospection and small-scale archaeological excavation were undertaken on the site of Kaštelina, a Late Iron Age hillfort settlement located on the Stolac promontory in the eastern part of Rab island (Kvarner Gulf, Croatia). Within the frame of the “Archaeological topography of the island of Rab” program, a Polish–Croatian team applied a series of multidisciplinary methods to study the occupational history of the site, its preservation, the nature of selected site features and future research potential. Ground-penetrating radar and magnetometer surveys, combined with the implementation of the Amplitude Data Comparison (ADC) method, led to the detection of remains of Late Iron Age building structures distributed over the northwestern side of the Stolac promontory. Archaeological excavations verifying the findings of the geophysical survey resulted in the discovery of a dwelling with associated outdoor features. A preliminary assessment of the outcome of a multidisciplinary approach to the study of the site of Kaštelina emphasizes the importance of the collected data for a general understanding of Late Iron Age settlements and their internal organisation in a wider context.
    Źródło:
    Polish Archaeology in the Mediterranean; 2020, 29(2); 447-467
    1234-5415
    Pojawia się w:
    Polish Archaeology in the Mediterranean
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integration of rail vehicle devices into one module in order to increase passenger safety and comfort
    Autorzy:
    Hejczyk, T.
    Wszołek, B.
    Gałuszka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/393623.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    passenger railway traffic
    safety
    collision detection module
    fire alarm module
    rail
    crossing monitoring
    ultrasonic method
    radar
    pasażerski ruch kolejowy
    bezpieczeństwo
    moduł wykrywania kolizji
    moduł alarmu pożarowego
    kolej
    monitoring skrzyżowania
    metoda ultradźwiękowa
    Opis:
    This paper presents an overview of collision and other threats (like e.g. rail crossing accidents) detection methods in railway passenger traffic. This overview leads to concept of Integrated System of Supporting Information Management in Passenger Traffic (the polish acronym of the system is ZSIKRP Demonstrator+). Currently on the polish and, as far as we know, international market such integrated solution is not developed and proposed. In this concept the final customer, e.g. the manufacturer or carrier company, will install one complete solution instead of multiple different installations that are usually difficult or even impossible to integrate. In our opinion the integration leads to increase in safety level of public transport and to improvement the quality of services offered. The novelty of the system is to provide collision, threats detection and fire alarm system integrated into a single coherent solution
    Źródło:
    Archives of Transport System Telematics; 2014, 7, 2; 45-50
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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