It proposes three spatial cognitive wayfinding models——based on directional relationship of initial node and current node; directional relationship of destination node and current node; and signposts in the environment respectively.
3.提出了三种基于空间认知的路径查找模型——分别是基于起始点和当前点的方向关系、基于目标点和当前点的方向关系与基于环境里的路标信息。
参考来源 - 基于空间认知的路径查找模型的设计与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
The directional relationship is one of the key theoretical issues in GIS.
方向关系是GIS中的一个重要的理论问题。
You want to configure the deletion rules on your bi-directional relationship.
你想配置删除规则在你的双向关系。
So there is a two-directional relationship here between the forgiver and forgiven.
因此，这是一种建立在宽恕者和被宽恕人之间的双向关系。
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