逐步详细讨论了进行信息预处理、二维实体环重构和三维实体重构时的关键技术。
The key techniques for information pre-treating, reconstruction of 2D loops and 3D entities are discussed in detail step by step.
简言之，矢量数据利用最简单的拓扑实体—点、线和多边形，并在二维笛卡尔坐标系统中固定它们来描述地理特征。
In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.
本文对HSCAE-3DRF6.0的网格处理所涉及的关键技术模块进行了研究，包括输入文件的形式、二维网格的划分、三维实体网格的划分三个部分。
The key technology of the HSCAE-3DRF6.0 in the meshing part has been discussed in this paper including the types of the input file, the mesh of surface and the mesh of solid.
在传统的二维设计模式下，零件不是以实体模型进行设计的，因此无法在计算机中对机器进行虚拟装配和运动仿真。
In the traditional 2d design mode, parts are not designed as solid models, therefore the virtual assembly and motion simulation for machinery products are impossible.
最后由零件和部件的三维实体生成用于指导制动器生产的二维工程图。
Lastly, the three-dimensional mold, made of components, turns out two-dimensional graph to direct the brake.
笔者试图从实体公正与程序公正的二维角度对“严打”进行价值和实证的分析。
An author carries on the analysis of value and authentic proof to "Yan Da" at the two dimension Angle that to attempt to from the substance just is just with the program.
制图模块，可以让你创建实体的二维工程图。你也可以创建曲面或者曲线。
Drafting lets you create drawings of solids. You can also utilize surface and curve options.
语义关联是语义数据模型中实体之间二维关系的知识表示形式。
Semantic association is defined as the representation of rich knowledge about binary relation in semantic data model.
首先采用有限元法，将撞击体离散成由三维实体单元构成的具有一定初始速度的离散质量系统，对靶板采用二维壳单元离散。
According to Finite Element Method, the impactor is considered as a discrete mass system in terms of 3D solid element with initial velocity, and 2D shell element is used for target plate.
针对虚拟仿真应用程序开发中的二维圆形区域与三维实体模型的融合显示问题，提出了一种简便的解决方案，即用聚光光源产生的光斑来模拟二维圆形区域在三维目标模型上的影印效果。
For the question of fusing display of circular area on 3d model, a simple solution was put out, that used a spot light source to simulate the fusing effect of circular area display on 3d model.
充分利用三维实体数据的完整性，实现各层次二维图形的自动生成和结构力学分析所需的数据模型的自动建立；
Making full use of integrity of 3D model information, the system automatically generates various kinds of 2D drawings and constructs the data model for structural analysis.
引用石墨经验力常数计算碳纳米管声子色散关系时 ，必须处理由二维平面卷曲形成三维实体纳米管所引入的问题 。
Based on the force constant model we calculate the phonon dispersion relations of single wall BC_3 nanotubes with different diameters and chiralities.
引用石墨经验力常数计算碳纳米管声子色散关系时 ，必须处理由二维平面卷曲形成三维实体纳米管所引入的问题 。
Based on the force constant model we calculate the phonon dispersion relations of single wall BC_3 nanotubes with different diameters and chiralities.
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