在这些研究中，地下三维地质体的表达研究是基础，其重点是地质体三维模型、三维数据结构以及三维可视化技术的研究。
All these researches base on 3d geologic volume describing and the emphases are 3d model of geologic volume, 3d data structure and 3d visualization of geologic volume.
按点-线-面的层次数据结构，选取几种有代表性的曲线曲面，实现了三维复杂外形的表面描述。
Based on a point line patch hierarchical data structure, three dimensional complex geometries are described by several typical kinds of surface patches.
但是您可以采用将一个四维数据结构看作是多个三维立方体的方式来理解四维数据结构。
But you can conceptualize a four-dimensional data structure by thinking of the fourth dimension as multiple three-dimensional cubes.
在此算法的基础上，利用数据结构的理论，实现了任意参数曲面的求交及拼合，并绘出了相应的三维视图。
On the above algorithm basis, according to theory of data structures, the intersection of any parametric surfaces is found and three-dimensional graphs are given.
它把仅适用于一维的多层均权法扩展到二维和三维，并引入更多的实测信息和块数据结构。
This method develop one-dimensional MAW method into high-dimensional DLB method by introducing HSFC, block data structure and even more measurement information.
本系统设计了自己的数据结构和存储结构，对三维图形建模平台的构建进行了一定的研究。
It designs its own data structure and file storage structure, and does a further study of the three-dimensional graphics platform instruction.
矿山三维gis利用3d数据结构来描述矿山三维实体，利用可视化、虚拟现实等技术实现矿山数据的三维显示。
Mine 3d GIS adopts 3d data structures to describe the mine 3d entity, and it realizes the 3d displaying by the methods of visualization and VR technology.
描述了一种新的网格生成技术，即笛卡尔非结构切割网格技术，采用叉树数据结构，完成了几种单段和多段翼型以及三维机翼的网格生成。
A new unstructured Cartesian cutted grid generation method is introduced. The grid generation of some airfoils and wing is performed with the tree data structure.
第四章介绍如何利用面向对象的方法建立船舶结构的三维实体模型，同时给出相关的数据结构；
The fourth chapter tells how to build 3D solid model for hull structure applying the oriented object technology, furthermore, the corresponding data structures are presented.
在虚拟加工环境的建造过程中，关键技术是三维实体的数据结构和加工仿真的逐步成型算法。
In the course of building virtual machining environment, key technologies include data structure of 3d solid and gradual molding algorithm in machining simulation.
这些算法和数据结构都围绕着一个问题，就是如何减少三维实体的点阵信息，以提高三维图形的显示速度。
The algorithms and the data structure are employed for reducing the grid information of 3d entity, so as to improve the display velocity of the 3d entity.
在对城市景观主要建模对象进行分类的基础上，建立了三维空间数据结构，实现了地形和地物模型三维重建的系列算法。
Based on the classification of the primary modeling objects in the city scene, we separately rebuild the model of the terrain and objects according to the 3d spatial data structure.
结合和尚桥铁矿实际，对应用三维栅格数据结构研究矿床的三维建模和储量计算中涉及的若干技术和方法进行了评述。
On the basis of state of Heshangqiao Iron Mine, the 3d modeling researching ore body by 3d grid data structure and some technologies and methods used in ore reserves calculation were reviewed.
然后提出了基于特征的实时协同设计方法，并重点对作为网络间协同信息的三维造型特征的数据结构和基于它的协同设计方式进行了研究。
After that the method of real-time cooperative design based on features has been put forward, and a study has been carried out emphatically on the data structure of 3d modeling features...
另外给出了一个海量数据的重建算法，该算法基于单层表面跟踪，并建立了缓冲机制，同时采用三角带的数据结构表达三维模型。
Another reconstruction of huge datasets was proposed, which is based on single surface tracking. We set up the caching mechanism and use triangle strip to represent the 3d model.
另外给出了一个海量数据的重建算法，该算法基于单层表面跟踪，并建立了缓冲机制，同时采用三角带的数据结构表达三维模型。
Another reconstruction of huge datasets was proposed, which is based on single surface tracking. We set up the caching mechanism and use triangle strip to represent the 3d model.
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