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    Wyświetlanie 1-9 z 9
    Tytuł:
    Determining the weights of a Fourier series neural network on the basis of the multidimensional discrete Fourier transform
    Autorzy:
    Halawa, K.
    Tematy:
    sieć neuronowa ortogonalna
    szereg Fouriera
    transformata Fouriera
    aproksymacja
    system nieliniowy
    orthogonal neural networks
    Fourier series
    fast Fourier transform
    approximation
    nonlinear system
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    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Powiązania:
    https://bibliotekanauki.pl/articles/907904.pdf  Link otwiera się w nowym oknie
    Opis:
    This paper presents a method for training a Fourier series neural network on the basis of the multidimensional discrete Fourier transform. The proposed method is characterized by low computational complexity. The article shows how the method can be used for modelling dynamic systems.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and development of a road traffic redirection system
    Autorzy:
    Bazan, M.
    Janiczek, T.
    Halawa, K.
    Dudek, R.
    Rudawski, Ł.
    Tematy:
    traffic redirection
    Dijkstra algorithm
    shortest paths
    dynamic rerouting
    guidance systems
    przekierowanie ruchu
    algorytm Dijkstry
    najkrótsza ścieżka
    dynamiczna zmiana trasy
    systemy kierowania
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    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Powiązania:
    https://bibliotekanauki.pl/articles/393375.pdf  Link otwiera się w nowym oknie
    Opis:
    Nowadays, the crucial issue of guidance systems based on a GPS signal is that they are not able to redirect road users, taking into account the current state of traffic (and the predicted state within the time of the travel) in the city. In this paper we present a three layer architecture of a computer system capable of redirecting users of an urban road system via routes with a lighter traffic load in order to reach their declared destination in the city. A basic layer is a multiprocessor calculation server running Dijkstra path search tasks, the middle layer - the one which is visible to the road user - is a replicable proxy server that collects route requests from road users. The third layer is a mobile application. The prototype of such a system was developed by the ArsNumerica Group. The crucial feature of the system is feedback from road users that allows us to adjust the whole Intelligent Transportation System in the city to changes in traffic flow at various road links introduced by the redirection process applied to many users. The performance test strategy to prove the efficiency of the architecture was carried out for the city of Wrocław.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new method to estimate dimensions of vehicle using a single camera
    Autorzy:
    Bazan, M.
    Janiczek, T.
    Halawa, K.
    Wykrzykowski, A.
    Łabuda, P.
    Tematy:
    vehicle dimensions estimation
    single camera vehicle sizes estimation
    calibration
    szacowanie wielkości pojazdu
    kalibracja
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    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Powiązania:
    https://bibliotekanauki.pl/articles/393575.pdf  Link otwiera się w nowym oknie
    Opis:
    The capability of a telematic vision system of estimating dimensions of vehicles is used for such tasks as vehicle classification or preselection of vehicles that violate local vehicle size limitations. Also in some European countries dimensions of heavy vehicles must obey some global regulations. Furthermore, vehicle size estimation allows us to determine the structure of traffic and can be very useful for advanced traffic flow control. Many existing Intelligent Transportation Systems consist of a large number of video cameras located in various places e.g., the ITS in Wrocław uses more than 1400 cameras. In this paper we propose a new method developed by the ArsNumerica Group and CyberTech Scientific Circle for the precise estimation of vehicle sizes using a single camera. The method does not require the entering of measurements such as the distance between lane lines or the height of the camera above the roadway. Only one vehicle’s dimensions are used for calibration. The proposed method is easy to implement and may be applied with the OpenCV library which is free both for academic and commercial use. The method is tested on real-world video streams. The obtained results are shown and analyzed in the paper.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Green wave optimization
    Autorzy:
    Bazan, M.
    Ciskowski, B.
    Halawa, K.
    Janiczek, T.
    Madej, Ł.
    Rusiecki, A.
    Tematy:
    green wave optimization
    ITS simulation
    road traffic simulations
    symulacja ITS
    symulacje ruchu drogowego
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    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Powiązania:
    https://bibliotekanauki.pl/articles/393363.pdf  Link otwiera się w nowym oknie
    Opis:
    In this paper we present the results of global optimization of green wave parameters (offsets, opening times, speed limit) for the main artery in the city of Wrocław (Poland). The optimization process was performed in ArsNumerica Execution Environment [1] and involved two different objective functions: the average waiting time and the average queue length. Both approaches were compared by calculating the number of vehicles that pssed the artery in a prescribed time.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of vehicles moving in wrong direction
    Autorzy:
    Bazan, M.
    Ciskowski, P.
    Halawa, K.
    Janiczek, T.
    Rusiecki, A.
    Śmigowski, M.
    Tematy:
    optical flow
    wrong direction driving incidents detection
    Lucas-Kanade method
    przepływ optyczny
    wykrywanie jazdy pod prąd
    metoda Lucasa-Kanade
    Pokaż więcej
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Powiązania:
    https://bibliotekanauki.pl/articles/393421.pdf  Link otwiera się w nowym oknie
    Opis:
    In this paper we describe a method for detecting situations where a vehicle moves along a highway in the wrong direction. The first step of the algorithm is to build a pattern using Gaussian mixture model based on the optical flow calculated with the Lucas-Kanade method. The second stage concerns the detection of objects as a potential road hazard. The optical flow calculated on-line during the second stage is compared with the traffic pattern used in the first stage. Then the difference in movement direction is detected using predefined thresholds.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multithreaded enhancements of the Dijkstra algorithm for route optimization in urban networks
    Autorzy:
    Bazan, M.
    Ciskowski, P.
    Dudek, R.
    Halawa, K.
    Janiczek, T.
    Kozaczewski, P.
    Rusiecki, A.
    Tematy:
    Dijkstra algorithm
    shortest paths
    fastest routes
    urban networks
    route optimization
    algorytm Dijkstry
    najkrótsza ścieżka
    najszybsza trasa
    sieć miejska
    optymalizacja trasy
    Pokaż więcej
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Powiązania:
    https://bibliotekanauki.pl/articles/393379.pdf  Link otwiera się w nowym oknie
    Opis:
    In this paper, we present a case study, showing step by step, how to speed up Dijkstra’s method by parallelizing its computation and using different data structures. We compare basic algorithm with its bidirectional version and investigate two-and-multi-thread implementations based on Fibonacci heaps and regular priority queues. Experimental results obtained for artificially generated graphs as well as real-world road network data are presented and described.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intelligent Transport System auditing using road traffic micro-simulation
    Autorzy:
    Bazan, M.
    Ciskowski, P.
    Halawa, K.
    Janiczek, T.
    Kozaczewski, P.
    Madej, Ł.
    Rusiecki, A.
    Tematy:
    traffic modeling
    intelligent transportation system
    road traffic simulations
    modelowanie ruchu
    inteligentny system transportowy
    symulacje ruchu drogowego
    Pokaż więcej
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Powiązania:
    https://bibliotekanauki.pl/articles/393731.pdf  Link otwiera się w nowym oknie
    Opis:
    ITS systems have been deployed for last one and a half decades. Their aim is to increase a traffic flow rate in a road network of an urbanized area, to improve the comfort of driving as well as to decrease the pollution. A lot of commercial software are is available to simulate road traffic in urbanized areas. Some of them are suitable to perform traffic simulations of intelligent transportation systems via traffic modeling. A process of traffic modeling exploiting numerical simulations for an urban area where an ITS is deployed requires provision of digital maps, traffic demand amongst city zones, traffic signalization micro-programs being executed in the environment that can imitate a dynamic behavior of traffic lights at intersections in the ITS. In this paper an execution environment, developed by the Ars Numerica Group, that launches a road traffic micro-simulation is used to audit a performance of intersections’ signalization micro-programs on one of the main arteries in the city of Wrocław (Poland).
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some aspects of Intelligent Transport System auditing
    Autorzy:
    Bazan, M.
    Bożek, M.
    Ciskowski, P.
    Halawa, K.
    Janiczek, T.
    Kozaczewski, P.
    Rusiecki, A.
    Tematy:
    intelligent transportation
    system audit
    travel time prediction
    fundamental diagram
    inteligentny transport
    audit systemu
    przewidywanie czasu podróży
    diagram fundamentalny
    Pokaż więcej
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Powiązania:
    https://bibliotekanauki.pl/articles/393760.pdf  Link otwiera się w nowym oknie
    Opis:
    Nowadays, in urbanized areas one of the most important matters is to determine a priori the time of driving from one zone of the city to another at various times of the day. The problem of travel time prediction is crucial in Intelligent Transportation Systems. The solution to this problem is a foundation of any route guidance system that will redirect drivers to their target destination via routes that have a lighter traffic load and thus higher travel velocity. In this paper is present a concept of a statistical methodology, developed by the ArsNumerica Group, that enables a quantity audit a travel time prediction algorithm. The methodology assumes that we are given database records of vehicles recognized by their unique identifier as well as duration times for which the messages with the predicted travel time are displayed VMS. the second aspect of ITS auditing considered in this paper is a placement of video cameras to measure vehicle stream velocity. Inappropriate camera location results in the fact that the stream velocity measured by them has a low usefulness for travel time prediction.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie aktywności proteolitycznej śliny u ludzi dotkniętych robaczycą przewodu pkarmowego
    The investigations on proteolytic activity of saliva in men with helminthosis of digestive tract
    Issledovanija proteoliticheskojj aktivnosti sljuny u ljudejj s gel'mintozom pishhevaritel'nogo trakta
    Autorzy:
    Gładysz, A.
    Halawa, B.
    Gajewski, J.
    Gładysz, K.
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Powiązania:
    https://bibliotekanauki.pl/articles/2176451.pdf  Link otwiera się w nowym oknie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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