航路内の船舶勢力圏

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タイトル別名
  • Ship Dominance Region in Route
  • コウロ ナイ ノ センパク セイリョクケン

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This paper presents a new approach for analyzing several important properties of marine traffic in which a number of ships pass through a restricted route. A key concept introduced is a mapping made from those spatially distributed ships into a Voronoi tessellation. A region interior of each Voronoi cell becomes equivalent to a dominance region of a ship, equating the areal boundary kept by each ship to avoid interferences with nearest others. Experiments are performed with various traffic flows generated from the past work of a multi-agent marine traffic simulator built on autonomous ship cluster behavior model. The Voronoi diagram can be produced in real time based on the agent positions obtained from the simulation. Parameterized with route width and number of ship agents, the characteristics of ship dominance regions, the emergence rates of the three kinds of dominance region forms, the average aspect ratio of regions, and the average number of columns in the route area are investigated. In addition, the Uraga Suido Traffic Route is used for case study to observe the characteristics of the increased traffics in comparison to the present situation. The significance of this research lies in the benefit of the proposed concept, especially at the application of the basic planning and designing of a route in consideration of the navigational environmental elements.

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