Hongxiang Ren’s research while affiliated with Dalian Maritime University and other places

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Publications (2)


Cable simulation in scene of tug handling simulator
  • Conference Paper

December 2013

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21 Reads

Hongxiang Ren

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Kelun Wang

Tug handling simulator not only can be used as the supplement of ship handling simulator, but also can be applied to the tug driver training and scientific research work. In the scene of tug handling simulator, the cable is an important part and is the focus of operators' attention. This paper analyzes the cable force model during the assistance operation process of the tug, and considers the affection of the cable mooring tension, gravity, air resistance, friction and so on. The cable is modeled and rendered with the spring-mass model, and the process of the cable's heaving up and paying out is simulated through changing the number of mass. As for the collision detection between cable and quay, a dimension reduction method is developed by determining whether the two-dimensional line segments intersect or not. The work has been applied in the tug handling simulator, and meets the display requirements of simulator.


Study on Art Gallery Based on 4-coloring

August 2009

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24 Reads

It isn't the best result on the art gallery based on the 3-coloring in resolving the most of simple polygons, through a analysis of the simple polygon triangulation in the relationship between adjacent triangles, using the dual relation between triangulation and binary tree, this paper puts a forward 4-coloring on the polygon triangulation, and analyze and research the case which has been 4-coloring. we can obtain some results that the condition of any type of colors could cover the whole polygon, and the condition that at least one type of colors could cover the whole polygon (namely the art gallery only need for monitors), we also analyzing the reason which failed to cover the whole polygon, and presenting the condition which couldn't be 4-colored.