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    Wyświetlanie 1-13 z 13
    Tytuł:
    Ant colony optimization for data acquisition mission planning
    Autorzy:
    Colmenares, G.
    Halal, F.
    Zaremba, M.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/407293.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    path planning
    environment monitoring
    ant colony optimization
    data acquisition
    navigation control
    satellite imagery
    constraint-based optimization
    Opis:
    The probabilistic Ant Colony Optimization (ACO) approach is presented to solve the problem of designing an optimal trajectory for a mobile data acquisition platform. An ACO algorithm optimizes an objective function defined in terms of the value of the acquired data samples subject to different sets of constraints depending on the current data acquisition strategy. The analysis presented in this paper focuses on an environment monitoring system, which acquires in-situ data for precise calibration of a water quality monitoring system. The value of the sample is determined based on the concentration of the water pollutant, which in turn is obtained through processing of multi-spectral satellite imagery. Since our problem is defined in a continuous space of coordinates, and in some strategies each point is able to connect to any other point in the space, we adopted a hybrid model that involves a connection graph and also a spatial grid.
    Źródło:
    Management and Production Engineering Review; 2014, 5, 2; 3-11
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Object Location Accuracy for iBeacon Technology based on the RSSI Path Loss Model and Fingerprint Map
    Autorzy:
    Grzechca, D. E.
    Pelczar, P.
    Chruszczyk, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/226970.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bluetooth
    indoor environment
    navigation
    radio links
    radiowave propagation
    Opis:
    This paper presents analysis of object location accuracy of a mobile device on the basis of the iBeacon technology. The research starts with radio signal strength indicator analysis along the corridor in order to create a path loss model for iBeacon. Two cases are taken into account: line of sight and non-line of sight for model creation. For both cases two tests: Chi-square, Shapiro-Wilk have been performed. It has also been checked if the HCI (Host Controller Interface) is a source with a memory. Acquired data have been filtered with different type of filters, e.g. median, moving average and then compared. Next, the authors evaluated the indoor positioning trilateration algorithms with the use of created model for exemplary hall. The RSSI map (radiomap) was created and the logarithm propagation model was designed. The logarithmic model estimated distance with average error 1.09m for 1 – 9m and 1.75m for 1-20m and after trilateration, the positions with average error 2.45m was achieved. A statistical analysis for acquiring data led to the final conclusion which enhanced knowledge about positioning based on the popular iBeacon technology.
    Źródło:
    International Journal of Electronics and Telecommunications; 2016, 62, 4; 371-378
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Agent system in control of ship movement
    Autorzy:
    Łebkowski, A.
    Dziedzicki, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069705.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    decision support system
    e-navigation
    ship passing
    route planning
    navigation environment
    modeling
    Opis:
    The problem of determining the optimal passing route of the ship between its current position and a remote destination point including the navigation situation occurring during moving along the route has been a subject of many papers and so far has not been definitely solved. In order to determine an optimal and safe route of the ship and its control along it, the author suggests application of an agent system. In the presented agent system three goals are accomplished. The first relies on data acquisition about current navigation situation around the ship and on analysis of possible collision risk. Second target – so far not present in anti-collision systems – relies on automatic negotiations between ships that operate in the same water region or between the coast stations in order to determine the potential area thru which a passing route could have been set. The third one connected to determining the passing route and its autocorrecting depending on current navigation situation.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2008, 2; 235--239
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic Reporting of Ships in the RIS System
    Autorzy:
    Lisaj, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/115969.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    river information service (RIS)
    Inland Navigation
    Sea-River Navigation
    Electronic Reporting
    Inland Vessel Traffic
    Environment Protection
    data transmission
    Navigational Information
    Opis:
    This article presents the principles of data transmission and processing in a module of duplex transmission of messages as required by ship reporting in the RIS (River Information Services) system. Technical specification of messages intended for ship commanders is analyzed. Data standards in harmonized River Information Services on inland waterways are presented. Furthermore, the analysis covers message structures, encrypting in XML format for electronic reporting by ships. Finally, the author evaluates the advantages of introducing the RIS system for the safety of inland vessel traffic and the effect of the system on environmental protection.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 2; 127-130
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Procedure for Marine Traffic Simulation with AIS Data
    Autorzy:
    Miyake, R.
    Fukuto, J.
    Hasegawa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/117537.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    AIS Data
    Marine Traffic
    Marine Traffic Simulation
    Collision Avoidance
    Automatic Identification System (AIS)
    safety at sea
    Traffic Simulation
    Navigation Environment
    Opis:
    It is essential to evaluate safety of marine traffic for the improvement of efficiency and safety of marine traffic. Spread of AIS makes observation of actual marine traffic more easily and faster than before. Besides, description of collision avoidance behaviours of ships are indispensable to simulate a realistic marine traffic. It is important to develop and implement an algorithm of collision avoidance corresponding to a target traffic or target area into the marine traffic simulation because actual actions for collision avoidance depend on circumstances where ships are sailing. The authors developed an automated marine traffic simulation system with AIS data. And in this paper, we proposed a series of systematic procedures for marine traffic simulation including analysing for collision avoidance behaviours using AIS data.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 1; 59-66
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analyses of manoeuvring patterns in real and virtual atoN environment
    Autorzy:
    Mraković, I.
    Bošnjak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201422.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    aids to navigation
    situational awareness at sea
    ECDIS training
    human error
    ship manoeuvring simulation
    V-AtoN environment
    irtual AtoN
    nautical simulator
    Opis:
    This paper presents a comparative analysis of manoeuvring patterns through the fairway which is marked with physical and virtual Aids to Navigation (AtoN). The impact of V-AtoN environment on decision-making and on consequent manoeuvres has never been studied in such a way. The results published in this paper were obtained using TRANSAS Navi Trainer 5000 and TRANSAS ECDIS 4000 simulators where 12 deck officers with at least 5 years of sea service participated. The results of the study indicate that there is a significant difference in manoeuvring patterns between the two environments. In case of virtual environment, more intense drift angles, ROTs as well as XTDs are observed. The paper demonstrates significant impact of virtual environment on behaviour of OOW.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 3; 617--623
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Marine Electronic Highway Project in Straits of Malacca and Singapore: Observation on the Present Development
    Autorzy:
    Said, M.
    Saharuddin, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/116824.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Marine Electronic Highway (MEH)
    Strait of Malacca
    Strait of Singapore
    Electronic Navigational Charts (ENC)
    Hydrographic Survey
    Environment Marine Information Overlays (E-MIO)
    e-Navigation
    UNCLOS
    Opis:
    Implementation of the Marine Electronic Highway (MEH) project in Straits of Malacca and Singapore will complement the efforts taken by Malaysia, Indonesia and Singapore as littoral states in enhancing safety of navigation and the prevention and control of marine pollution in the Straits. The Project Steering Committee meetings of the MEH indicate that, the progress in the implementation of its activities is in the midst of many challenging conditions. The efforts is a testament that the littoral states are working together to ensure the implementation of this project is running smoothly since the donor agencies, user States and the maritime industry have great expectations on its success. The MEH project consists of four important components such as Hydrographic Survey and Electronic Navigational Charts (ENCs) production, Environment Marine Information Overlays, Baseline Survey and Information Technology Structure. This paper will address the current status of the implementation of the four key components highlighting the development of ENCs as a vital tool to sustain the safety of navigation along the straits. The discussion in this paper is based on some preliminary survey findings and from reports of the Project Steering Committee meetings.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 301-304
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Planowanie trasy robota Kurier w środowisku dynamicznym z wykorzystaniem sieci komórkowych
    Path planning in a dynamic environment based on CNN
    Autorzy:
    Siemiątkowska, B.
    Chojecki, R.
    Różańska-Walczuk, M.
    Przybylski, M.
    Węclewski, P.
    Wiśniowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/276786.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    robotyka mobilna
    nawigacja
    planowanie trasy
    otoczenie dynamiczne
    mobile robotics
    navigation
    path planning
    dynamic environment
    Opis:
    Sterowanie robotem mobilnym jest podstawowym zagadnieniem w trakcie tworzenia projektu związanego z platformą mobilną. Najnowsze trendy wskazują, że w chwili obecnej najpowszechniej rozwijane są autonomiczne systemy sterowania ruchem. W artykule przedstawiono projekt naukowy, którego celem jest zbudowanie robota z zaimplementowaną całkowicie autonomiczną nawigacją. Końcowym założeniem projektu jest wdrożenie wyników badań do realnej aplikacji. Istotnym problemem, który dotyczy nawigacji jest planowanie trasy robota. Aby platforma mogła być wykorzystana w realnym środowisku z poruszającymi się obiektami dynamicznymi, należy je również uwzględnić w trakcie planowania trasy. W artykule dokonano porównania istniejących i proponowanych przez autorów rozwiązań planowania ścieżki. Projektując robota usługowego, który będzie mógł dzielić przestrzeń z ludźmi oraz obiektami dynamicznymi istotny jest także krótki czas reakcji na zmiany otoczenia. Problem ten rozwiązywany jest poprzez urównoleglenie mocy obliczeniowej komputera. Zaproponowaną technologią wykorzystaną w tym celu są obliczenia na procesorach graficznych GPU.
    The control of mobile robot is a fundamental and basic task. Nowadays, the most actual trends focus on autonomous control systems. This paper describes a scientific project, which main goal is fully autonomous navigation system, designed for new construction of mobile robot. Final stage of the project is real application. The significant problem of robot navigation is path planning, especially when mobile platform is predestinated to be used in a real environment enclosed with dynamic obstacles. Dynamic objects should be considered in the path planning algorithm. The navigation system of mobile robot, moving among people, should response with short reaction time for fast environment changes. In this paper authors present parallel computing implementation, in this case - with use of graphic processors (GPU).
    Źródło:
    Pomiary Automatyka Robotyka; 2012, 16, 2; 281-288
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Towards use of dijkstra algorithm for optimal navigation of an unmanned surface vehicle in a real-time marine environment with results from artificial potential field
    Autorzy:
    Singh, Y.
    Sharma, S.
    Sutton, R.
    Hatton, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/116058.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    autonomous vehicles
    dijkstra’s algorithm
    Unmanned Surface Vehicle (USV)
    port of portsmouth
    Artificial Path Planning (APF)
    Artificial Potential Field
    real-time marine environment
    optimal navigation
    Opis:
    The growing need of ocean surveying and exploration for scientific and industrial application has led to the requirement of routing strategies for ocean vehicles which are optimal in nature. Most of the op-timal path planning for marine vehicles had been conducted offline in a self-made environment. This paper takes into account a practical marine environment, i.e. Portsmouth Harbour, for finding an optimal path in terms of computational time between source and end points on a real time map for an USV. The current study makes use of a grid map generated from original and uses a Dijkstra algorithm to find the shortest path for a single USV. In order to benchmark the study, a path planning study using a well-known local path planning method artificial path planning (APF) has been conducted in a real time marine environment and effectiveness is measured in terms of path length and computational time.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 125-131
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie UAV w nawigacji
    The use of UAVs in navigation
    Autorzy:
    Świerczyński, Sławomir
    Zwolan, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/315241.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    UAV
    drony
    nawigacja
    środowisko morskie
    drones
    navigation
    sea environment
    Opis:
    Na przestrzeni ostatnich lat nastąpił bardzo dynamiczny rozwój bezzałogowych jednostek, które są wykorzystywane niemal w każdej dziedzinie życia. W artykule przedstawiono możliwości wykorzystania UAV w szeroko pojętej nawigacji, jak możemy korzystać z dronów w środowisku morskim, obserwować porty, prowadzić misje na morzu, jak robić mapy dna morskiego i jakie korzyści z dronów ma środowisko wojskowe.
    Over the past years, there has been a very dynamic development of unmanned aerial vehicles that are used in almost every area of life. The article presents the possibilities of using UAVs in the broadly understood navigation, how to use drones in the sea environment, observe ports, conduct missions at sea, how to make seabed maps and how drones are used in the army.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2019, 20, 12; 210-214
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ współczesnych warunków środowiska nawigacji morskiej na jej rozwój
    Influence of present marine navigation conditions on developments in navigation
    Autorzy:
    Urbański, J.
    Morgaś, W.
    Mięsikowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/222464.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
    Tematy:
    nawigacja morska
    ochrona środowiska morskiego
    globalizacja
    zagrożenie terrorystyczne
    marine navigation
    protection of maritime environment
    globalization
    terrorist threat
    Opis:
    W artykule podjęto próbę przedstawienia i przedyskutowania współczesnych warunków rozwoju nawigacji morskiej. Na podstawie analizy czynników operacyjnych towarzyszących współczesnemu rozwojowi nawigacji morskiej autorzy doszli do wniosku, że trzy spośród wielu czynników środowiska nawigacji morskiej są najbardziej istotnymi i najbardziej charakterystycznymi: ochrona środowiska morskiego, globalizacja oraz zagrożenie ze strony terroryzmu morskiego.
    The paper makes an attempt to present and discuss today's conditions of developments in marine navigation. It is assumed that these present conditions of developments in maritime Józef Urbański, Wacław Morgaś, Mariusz Mięsikowski 116 Zeszyty Naukowe AMW navigation are as follows: protection of marine environment, globalization, especially the economic one, and maritime terrorism.
    Źródło:
    Zeszyty Naukowe Akademii Marynarki Wojennej; 2009, R. 50 nr 2 (177), 2 (177); 107-116
    0860-889X
    Pojawia się w:
    Zeszyty Naukowe Akademii Marynarki Wojennej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Camera navigation support in a virtual environment
    Autorzy:
    Wojciechowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/201537.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    virtual environment
    camera navigation
    potential field
    Opis:
    Artificial camera navigation is the most ubiquitous and principal interaction task within a virtual environment. Efficient and intuitive virtual scene navigation affects other tasks completion performance. Though many scientists have elaborated invaluable navigation techniques design guidelines, it is still, especially for novice users, the really challenging and demanding process. The user interface input hardware imprecision, interface operation cognitive burden put on users and deficiency of direct mapping between user physical movement and virtual camera navigation evoke discrepancy between user desired and actual camera position and orientation. The provided paper concentrates on the new potential field based camera navigation support method. Originally designed and exploited potential fields support not only collisions solving, but goal profiled attraction and camera manoeuvring as well. It works both in static and dynamic environments. It can be easily boosted by the GPU approach and eventually can be easily adapted for advanced or novice interface users for a miscellaneous navigation task completion.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 871-884
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation of Virtual Aids to Navigation to the Physical Environment
    Autorzy:
    Wright, R.G.
    Baldauf, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/116999.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Aids to Navigation (AtoN)
    Virtual Aids to Navigation
    physical environment
    AIS Data
    Electronic Chart Display and Information System (ECDIS) Landmarks
    marine navigation
    electronic navigation
    Opis:
    Virtual electronic aids to navigation are being introduced into the present short range aids to navigation system in the form of Automated Information System radio-based aids. Research is also underway into the development of their equivalents for use in regions that feature hostile environments, are poorly charted and lack any infrastructure whatsoever to support traditional or radio navigation aids. Such aids are entirely virtual in nature and exist only as a digital data object that resides within an electronic navigation chart for display to mariners through an Electronic Chart Display and Information System. They are at present experimental in nature, and are not intended to replace existing physical or radio-based aids to navigation. Results of research are described in terms of fulfilling traditional navigation aid functions and the development of new functions that are only possible using virtual aids. Their advantages in design and implementation are highlighted, as are their limitations and shortcomings as compared to present methodologies. Notable, however, is the approach used to overcome limitations and shortcomings by considering attributes of the physical environment to ensure their proper location and display of correct characteristics. Such an approach is unique in the modern world, yet it emulates ancient methods of navigation using known landmarks and terrain features.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 287-299
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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