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    Wyświetlanie 1-4 z 4
    Tytuł:
    A container ship traffic model for simulation studies
    Autorzy:
    Wawrzyniak, Jakub
    Drozdowski, Maciej
    Sanlaville, Éric
    Powiązania:
    https://bibliotekanauki.pl/articles/2172133.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    benchmark instances
    algorithm evaluation
    data analysis
    container ship
    traffic modeling
    marine logistics
    instancje wzorcowe
    ocena algorytmu
    analiza danych
    kontenerowiec
    modelowanie ruchu
    logistyka morska
    Opis:
    The aim of this paper is to develop a container ship traffic model for port simulation studies. Such a model is essential for terminal design analyses and testing the performance of optimization algorithms. This kind of studies requires accurate information about the ship stream to build test scenarios and benchmark instances. A statistical model of ship traffic is developed on the basis of container ship arrivals in eight world ports. The model provides three parameters of the arriving ships: ship size, arrival time and service time. The stream of ships is divided into classes according to vessel sizes. For each class, service time distributions and mixes of return time distributions are provided. A model of aperiodic arrivals is also proposed. Moreover, the results achieved are used to compare port specific features.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2022, 32, 4; 537--552
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on the site selection and path layout of the logistics distribution center of marine ships based on a mathematical model
    Autorzy:
    Tong, Haolin
    Powiązania:
    https://bibliotekanauki.pl/articles/2173920.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    marine ships
    distribution center
    site selection
    ship logistics
    mathematical model
    statki morskie
    centrum dystrybucyjne
    wybór lokalizacji
    logistyka statków
    model matematyczny
    Opis:
    For logistics enterprises, site selection and path layout are related to the cost and efficiency of distribution, which is a very critical issue and has an important impact on the development of enterprises. Compared with land logistics, the cost of marine ship logistics is higher due to the high cost of ships, so the research on the location and path layout of its distribution centers is also particularly important. This paper established a two-layer model under the assumption that unit transpor-tation costs and administration expenses are known for the site selection and path layout problems of marine ship logistics distribution centers. Corresponding constraint conditions were set. The upper layer was the optimization model of the site selection problem of the distribution center, and the objective function was to minimize operating and construction costs and was solved using the quantum particle swarm optimization (QPSO) algorithm. The lower layer was the optimization model of the distribution path layout, and the objective function was to minimize the logistics distribution cost and was solved using the ant colony optimization (ACO) algorithm. The model was verified through an example analysis. It was assumed that there were three ships, five candidate distribution centers, and ten customer points. The model was solved in MATLAB software. The results of the example analysis showed that compared with K-means, genetic algorithm (GA), and particle swarm optimization (PSO)-ACO algorithms, the QPSO-ACO algorithm had the shortest running time, about 60 s, which saved about 50% compared to the K-means algorithm. The optimal cost of the QPSO-ACO algorithm was 293,400 yuan, which was significantly lower than the K-means, GA, and PSO-ACO algorithms (459,600 yuan, 398,300 yuan, and 357,700 yuan). In this example, the site obtained by the QPSO-ACO algorithm was distribution center 2, and the obtained path distribution was 1-7-5-4, 2-6-3, and 10-8-9. The results verify the effectiveness of the QPSO-ACO algorithm in solving the problem of site selection and path layout. The QPSO-ACO algorithm can be applied in the actual marine ship logistics.
    Źródło:
    Archives of Transport; 2022, 63, 3; 23--34
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of external environment to the ferry lines and marine passenger terminals
    Autorzy:
    Krile, Srećko
    Maiorov, Nikolai
    Powiązania:
    https://bibliotekanauki.pl/articles/1841149.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    marine transport processes
    passenger flow
    simulation
    ferry network
    cruise network
    marine passenger port
    logistics
    Baltic Sea
    Adriatic Sea
    ferry line
    cruise market
    procesy transportu morskiego
    przepływ pasażerów
    symulacja
    sieć transportu promowego
    sieć morskiej turystyki wycieczkowej
    morski port pasażerski
    logistyka
    Morze Bałtyckie
    Morze Adriatyckie
    linia promowa
    rynek rejsów wycieczkowych
    Opis:
    Marine passenger ports are integrated into the transport systems of cities and regions today. If there are sufficient developed mathematical forecasting models in the class of polynomial models, probability series, and a number of others, then the models describing the influence of the external environment on ferry market are not sufficient. The developed scheme of interaction between the participants of the cruise market and the mathematical model of the port as a technical system is presented in this research. The article substantiates new purposes to use the logistic function to assess the external environment. A mathematical model and the derivation of the new basic equation of the logistic function for ferry market are given. Analytical data were collected on the ports and terminals of the Adriatic Sea and the Baltic Sea, and data were selected of ship calls at the passenger port St. Petersburg “Marine Facade” (2019-2020). The article proposes the consideration of new various proportionality factors that will determine the demand for cruise transportation modeling in the short-term forecasting interval. A complete mathematical model is given taking into account the real schedule of the sea passenger port. The logistic function proposed in the article allows us to solve the forecasting problem in a new way in relation to the selection and evaluation of a cruise product. Moreover, it allows us to solve a group of economic problems related to promotion problem for particular cruise product on the market, allows us to evaluate the activity of passengers when they are choosing a cruise product, and allows us to make adjustments to the planned port working schedules and to make timely adjustments. The main advantage of the proposed model is an analytical assessment of the effect of the external environment, both on passenger ports and on ferry and cruise companies.
    Źródło:
    Transport Problems; 2020, 15, 4, cz. 2; 203-214
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maritime and logistics perspectives on short sea shipping sustainable sollutions to road congestion
    Autorzy:
    Baylon, A. M.
    Dragomir, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/117356.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    marine transport development
    short sea shipping
    road congestion
    logistics
    maritime logistics
    European Transport
    European Transport Policy
    maritime perspectives
    Opis:
    The paper presents the European Union’s approach to promote the advantages of short sea shipping as efficient and sustainable alternative solution to the global issues of road congestion. European Commission has made Short Sea Shipping one of the major priorities for European transport and maritime industries have made it one of their key areas for development. Short Sea Shipping plays an important role in reaching the objectives of the European Transport Policy, as it can help curb the forecasted substantial increase in heavy goods vehicle traffic, rebalance the modal shares and bypass land bottlenecks. In the paper are presented the advantages of Short Sea Shipping and the measures adopted by the European Union in order to better promote the use of this mode. Short Sea Shipping needs to be developed within an integrated and participatory approach, with the reliable involvement of stakeholders from the entire sector in order to fulfil its economic, commercial, social and environmental role.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 1; 33-36
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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