The results in this paper are possesses an important meaning to the position of the ostium of frontal sinus, adjacency relation and prevent anterior ethmoid artery from the risk of injury. 结论本文的结果对鼻内镜下额窦手术的额窦口定位、与毗邻的关系以及预防筛前动脉的损伤有其重要的指导意义。
It is put forward that cellular neighbor ′ s type has not only adjacency of geometrical space but also neighbor of non-space because of relation in attribution based on cellular space relation and neighbor description. 文中在分析元胞空间关系和元胞邻居描述的基础上,提出元胞邻居存在几何空间上的邻接形式和空间上不邻接但属性上相关的邻居形式。
However, existing MPR-based flooding algorithms neglect the impact of common adjacency relation of relaying nodes. 然而现有的基于MPR策略的泛洪算法忽视了转发节点之间所存在的共有邻接关系对结果的影响。
The geometric model from CAD system contains a great deal of trimmed parametric surfaces, and the adjacency relation between trimmed surfaces is very complex. 在板料冲压成形模拟分析中,从CAD系统输入的模具的曲面模型包含大量的裁剪参数曲面,曲面之间的相邻关系复杂。
Finally, this paper discusses the theories of multi-interpretation machining feature model that is the output of this conversion system, and has built the Feature Adjacency Graph and the And-Or Relation Graph which can meet the needs of all models. 最后,本文对所建立的系统输出模型&加工特征多义解释模型的实现技术进行了详细的论述,提出的特征邻接图和与或关系图可以很好的满足各级模型的需要。
Based on the improved Marching-Cubes algorithm, the normal vector of intersection point is obtained through the calculation adjacency relation between vertex and triangle slice. The calculation of contour surface of irregular data field in engine inner flow system is resolved. 基于MarchingCubes算法改进,通过对每个顶点与三角片之间邻接关系的计算,获得交点法矢,解决了发动机内流系统非规则数据场中等值面的计算。
Tool path creation: By study on each adjacency relation between line and arc, this paper can calculate formula of each kind of tool path transition point vector, and can create exact& accurate tool path. 切割轨迹生成:通过研究线和圆弧的各种邻接关系,推算出各种邻接情况下转接交点矢量的数学计算公式,生成准确和精确的刀具轨迹。
A multi-constraint region merging strategy considering spatial adjacency relation, area, spectral and textural properties is proposed to merge the initial segments. 以空间相邻关系、面积、光谱与纹理等因素多约束地合并最初的分割区域。