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Wyszukujesz frazę "model parameters" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Oil Spill Models: A State of the Art of the Grid Map as a Function of Wind, Current and Oil Parameters
    Autorzy:
    Mazurek, J.
    Smolarek, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/116520.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    oil spill
    Oil Spill Model
    Grid Map
    wind
    current
    Oil Parameters
    Opis:
    An integrated model, which contains flow and transport‐fate modules, will be presented for simulating transport and fate of oil spills at seas. The flow module uses different kinds of meshes that provide great flexibility for modeling the flow in complex geometries of currents and barriers. The refined grid resolution in regions of interest is important. Horizontal diffusion is simulated using random walk techniques in a Monte Carlo framework, whereas the vertical diffusion process can be solved on the basis of the Langeven equation. The model contains the most significant processes which affect the motion of oil particles. For a better fit to the curvature of the coastline there are used unstructured non overlapping rectangular or triangle grid cells. Special attention must be paid to choose the horizontal and vertical resolution in simulating the oil trajectory in the coastal area.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 1; 19-23
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of a multiple regression model to determine the parameters of vessel traffic flow in port areas
    Autorzy:
    Nowy, A.
    Gucma, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/117457.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    maritime traffic engineering
    vessel traffic flow
    port areas
    multiple regression model
    fairway
    fairway parameters
    Automatic Identification System (AIS)
    AIS Data
    Opis:
    The paper presents the method of determining ships traffic stream parameters by means of regression method. The aim of the studies was to determine the correlation between the ship's parameters and the parameters of the fairway. Developing the presented model with information on the position of the vessel's antenna and information on the accuracy of position determination will allow creating a model for predicting the parameters of waterways.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 443-449
    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 analysis of the data on the surface currents and wind parameters generated by numerical models on the Szczecin Lagoon area
    Autorzy:
    Kijewska, M.
    Pleskacz, K.
    Kasyk, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/117323.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Szczecin Lagoon
    surface current
    wind parameters
    hydrodynamic model
    weather forecast
    numerical models
    Geographic Information System (GIS)
    High Frequency Surface Wave Radar (HFSWR)
    Opis:
    This study focuses on the investigation of available surface currents and wind parameters for employing them in order to predict the survivor movement in the Szczecin Lagoon waters. For this purpose, the surface currents and wind parameters were generated by selected numerical models and the wind parameters were also measured with the telemetry devices. In this paper, the PM3D hydrodynamic model and the NEMS, ECMWF, GFS weather forecast models have been investigated. The measurements of the wind parameters, recorded at the Brama Torowa I and Trzebież stations, were also analyzed. As part of the research, an expert method was used to evaluate the surface currents parameters. In turn, the method based on comparing the forecasted wind parameters with the measured wind parameters was applied in order to assess uncertainties of these parameters. The comparative analyses of the data on the surface currents and wind parameters have been done and probabilistic models for uncertainties of these forecasted parameters have been formulated. Additionally, relations between the surface currents speeds and the wind speeds, in the case when their directions were consistent, have been also discovered.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 729-737
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Parameters to Model Seafarers’ Supply in Latvia
    Autorzy:
    Gailitis, R.
    Fjodorova, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/116496.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Maritime Education and Training (MET)
    MET System in Latvia
    Model Seafarers’ Supply
    Automatic Identification System (AIS)
    Package Error Rate (PER)
    Determination of Parameters
    Merchant Fleet
    Inland Shipping
    Opis:
    Shortage of seafarers is important topic as maritime industry plays a key role for economy of the European Union. According to the latest assessment of economic value of shipping industry in 2012, the EU shipping industry is estimated to have directly contributed €56 billion to GDP, employed 590,000 people, and generated tax revenues of €6 billion. During recent years increasing attention is paid to the education and training of seafarers as the seafarers and their knowledge are essential to sustainable development of the maritime cluster, as indicated in the maritime strategy of European Union. Indicative estimates suggest there were almost 38,000 students/cadets in maritime academy – type training across the EU and Norway in 2012, a 11% increase from 2004. Understanding of current trends in the pool of seafarers is prerequisite for successful implementation of the strategy. Main obstacle for assessment of effectiveness is lack of possibilities to monitor contribution from maritime education institutions to current state of European seafarers’ pool. The aim of this article is to show parameters which should be taken into account to model seafarers’ supply in future. The parameters are discussed on the basis of information from the Seamen Registry of Maritime Administration of Latvia.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 2; 245-252
    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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