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directional relations
相关语句
  方向关系
     Qualitative representation and reasoning of topological relations and directional relations are given in detail respectively. And qualitative reasoning of directional relation based on Space with Neutral Zone, with the theorem that is satisfied, is also presented.
     论文分别讨论了拓扑关系(Topological Relations)定性表示与推理,以及方向关系(Directional Relations)定性表示与推理,特别是基于井字空间的方向关系定性表示与推理方法,给出了这种推理方法满足的定理。
短句来源
     Based on this, a qualitative representation model of spatial relations, SR representation model, which combines qualitative representation of topological relations and directional relations, is given. The Constraint Rules between RCC8 and directional relationsin Space with Neutral Zone are also given.
     在此基础上,将拓扑关系和方向关系相结合,提出了空间关系的SR表示模型(SR Representation Model),给出了井字空间(Space with Neutral Zone)中方向关系与拓扑关系RCC8之间的约束规则(Constraint Rules)。
短句来源
     Progress has been made in the models of directional relations between spatial objects.
     空间对象的方向关系模型的研究已经取得了一定的进展。
短句来源
     At last, we explained this way through introducing how to realize a complex spatial query, which includes topological relations and directional relations at the same time, using the model of binary topological relations and the model of symbolic spatial indexes.
     最后结合空间查询中的实例,通过介绍如何同时运用二值拓扑关系模型和符号空间索引模型来实现同时包含拓扑关系和方向关系的复杂空间查询来说明这种方法。
短句来源
     First, the qualitative representation of topological relations based on RCC is introduced. Then, the qualitative representation of directional relations is discussed. Finally, a qualitative representation model, SR representation model, which combines qualitative representation of topological relations and directionalrelations,isgiven.
     介绍了基于RCC的拓扑关系定性表示,讨论了方向关系的定性表示,给出了一个将拓扑关系定性表示和方向关系定性表示相结合的定性表示模型——SR表示模型。
短句来源
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  “directional relations”译为未确定词的双语例句
     Research on Spatial Directional Relations Models and Combined Spatio-temporal Reasoning
     空间方位关系模型与时空结合推理的研究
短句来源
     This paper presents the establishment of formal model of directional relations based on Voronoi diagram and Delaunay triangulation detailedly. The paper describes the logical structure of the model and the process of direction calculation.
     详细阐述了基于 Voronoi图的空间方向关系形式化描述模型的建立 ,给出了模型的逻辑结构和空间方向的计算过程。
短句来源
     Basing on the difference of directions between the direction of phase shift constant and direction of amplitude attenuation when the electromagnetic wave propagates in conductive medium,and using the boundary conditions of electromagnetic wave at the interface of conductive media,we set up the formulae of directional relations between the direction of phase shift constant and direction of amplitude attenuation,and realize that two directions of phase shift constant and amplitude attenuation are expressed with one incident angle.
     基于非均匀电磁波在导电媒质中传播时其相移常数和振幅衰减方向的不一致性,根据电磁场边值关系建立了导电介质中电磁波的相移常数向量和振幅衰减向量方向的定量关系,实现了将相移常数向量和振幅衰减向量的两个方向统一用一个角度表示.
短句来源
     This paper focuses on quantitative computation and formal representation of spatial directional relations, which may be derived directly from digital information stored in spatial databases.
     针对GIS中空间信息数字存储和数字表达的特点,本文首先提出了GIS数字环境下计算空间方向关系的定量表达模型。
  相似匹配句对
     On Relations
     论关系
短句来源
     c. Relations
     三、关系。
短句来源
     Representation of Assembly Relations by Directional Assembly Connection Graph
     装配关系的有向图表达方法研究
短句来源
     The Syntax and Sense-Relations of “Verb+ Directional Verb”
     “动词+趋向动词”句法及语义关系
短句来源
     Application of directional sound
     方向指示声的应用
短句来源
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  directional relations
An experimental test has been carried out and the result indicates that the directional relations computed from this model is very close to those perceived by human beings.
      
However, in spatial query and analysis, there is also a need of directional relations between point and line, point and area, line and line, line and area, and area and area.
      
A Statistical Model for Directional Relations Between Spatial Objects
      
In this paper we propose a new modal logic, called spatial propositional neighborhood logic (SpPNL for short) for spatial reasoning through directional relations.
      
Close directional relations between the dyke trends and the orientations of historic fissures on the volcano, point to the existence of a plexus of interconnecting subsurface fissures immediately to the south-east of the summit.
      
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Directional relation is very important in GIS, But because of depending on the size of objects, it is difficult to make a formal description and determination. In this paper on the basis of CDR, a solution using Voronoi Diagram is suggested, and the wonderful results have been acquried.

方向关系在 GIS中占据着十分重要的地位 ,由于它的模糊性和依赖空间实体形状的特殊性 ,使得它的形式化描述和判断比较困难。文中在 CDR方法的基础上 ,利用 MBR四边的 Voronoi多边形及其边界 ,形式化描述了方向关系 ,进而将方向关系分为主方向关系和次方向关系 ,并分别给出了两者利用 MBR四边 Voronoi多边形及其边界判断的算法。

Formal description of spatial directional relation is a nodus in the area of spatial relations, but no perfect model exists till now.A new method is put forward in this paper. Firstly, the paper discusses and gives two main factors that affect directional relation between two objects. One is the diameter of the convex hull of two objects; another is the visible region between two objects. Then the practicability of formal description of directional relation using Voronoi diagram is discussed....

Formal description of spatial directional relation is a nodus in the area of spatial relations, but no perfect model exists till now.A new method is put forward in this paper. Firstly, the paper discusses and gives two main factors that affect directional relation between two objects. One is the diameter of the convex hull of two objects; another is the visible region between two objects. Then the practicability of formal description of directional relation using Voronoi diagram is discussed. The conclusion is that Voronoi diagram is a good tool to describe directional relation.

空间方向关系形式化描述模型是空间方向关系研究的难点和重点 ,目前尚无完善的模型出现。首先提出了影响空间方向关系的两个因素目标 :一是两目标群点凸壳的直径 ;二是目标的可视性。论述了运用平面目标Voronoi图作为两目标指向线的“替身”来描述方向关系在理论上的可行性。本文的结论是 :Voronoi图是描述空间方向关系的良好工具

This paper presents the establishment of formal model of directional relations based on Voronoi diagram and Delaunay triangulation detailedly.The paper describes the logical structure of the model and the process of direction calculation.To demonstrate the correctness,some calculation examples are given,and the advantages and disadvantages are discussed at the end.

详细阐述了基于 Voronoi图的空间方向关系形式化描述模型的建立 ,给出了模型的逻辑结构和空间方向的计算过程。为了应证模型的正确性 ,文章给出了应用该模型计算空间方向的几个例子 ,并在最后总结了模型的优缺点

 
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