我们面对的世代是 -- 与实体世界融合在一起的运算.如果你没有平面可用，手掌也可以处理简单的功能。
So, we are looking for an era where computing will actually merge with the physical world. And, of course, if you don't have any surface, you can start using your palm for simple operations.
地层实体用多面体的边界表示法来表示，由布尔集合运算来获得。
The final solids of strata are represented by polygonal boundary representations, which are constructed by Boolean set operations.
利用齿坯实体模型和刀具实体模型做布尔减运算，来实现模拟工件材料的去除过程；
The cutting process was performed through subtraction boolean operation of the solid model of workpiece and cutter.
实体线、实体面，一般用来执行布尔运算。
三维实体布尔运算。
其次，概述了主要的几个三维模型的表示法，并对三维实体间的集合运算进行了研究。
Secondly, the paper summarizes the main representations of 3d modeling and carries ona research to the set operations of 3d modeling.
数据库中多个实体呈树形关联时，对海量数据作多层实体连接运算时要消耗系统大量的内存资源。
Vast memory resource is consumed when great capacity data is retrieved while many layers of entities in a database are re - lated like a tree and join operation is carried out.
基于笔者在欧拉描述下模拟注射填充过程的显式算法，应用实体流模型实现了用于注塑填充过程的全矢量化运算显式算法。
On the basis of previous explicit algorithms realized by the authors, a new vectorial and explicit algorithm is proposed and developed for solid flow model under the frame of Eulerian description.
把全部有效实体单元进行3维实体布尔运算，得到牙齿的实体模型。
All obtained valid 3d solid elements are combined with Boolean operation, and the volumetric model of a tooth is then achieved at last.
把全部有效实体单元进行3维实体布尔运算，得到牙齿的实体模型。
All obtained valid 3d solid elements are combined with Boolean operation, and the volumetric model of a tooth is then achieved at last.
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