This paper provides a hierarchical semantic model for the design of complex products based on existing 3D CAD software.
针对复杂产品的设计建模提出了一个层次语义模型。
However, measurement system can not link with 3d CAD system directly because the measured dense scattered data can not be processed effectively by 3d CAD software.
然而测量系统和三维CAD系统之间无法直接结合，因为测量得到的数据是海量散乱点，三维CAD无法对之进行高效处理。
Proficiency in office software, some experience on 3d CAD.
熟练操作办公软件，有3DCAD操作经验。
We wanted to see if this view was Shared, or whether people feel that BIM can be identified solely with software or 3d CAD.
我们希望看看这样的观点是否会被赞同并分享，还是说人们仅仅只是觉得BIM是单一的软件或者三维CAD。
Across all countries, as the graph shows, it is a minority who feel that BIM can be reduced to a piece of software or a set of 3d CAD drawings.
图表中显示，在所有国家中，少数人认为BIM可简略理解为一款软件或一套三维CAD图。
The realization of this new machining method, the theory method of combining 3D modeling software with CAD/CAM were introduced.
本文论述了这种新方法的实现过程，并论述了三维艺术建模软件与CAD/CAM软件结合的理论方法。
On the basis of studying the 3D mapping in packaging CAD system, bring 3d mapping forward packaging CAD system for software of packaging decorate and realize it.
本课题从包装CAD系统出发，针对包装装璜软件设计提出将真实感贴图用于包装CAD系统中，并给予实现。
Now , 2D CAD drawing software is very prevalent , but which has many limits in exhibition of 3D objects.
目前二维CAD绘图软件的使用已相当普遍，但二维图形表示三维物体存在许多局限性。
The purpose of this paper is to develop a 3d pipe CAD software with perfect function, high efficiency and reliability which is accustomed by the engineers in our country.
本课题是以开发功能完善、高效可靠、符合我国工程设计人员使用习惯的三维管道CAD软件为目的。
The several current mechanical CAD software has the shortcoming of poor human-computer interaction, can not finish structural design and 3d graphics drawing and so on.
而现有的几种机械CAD软件存在交互性差、不能进行结构设计和三维绘图等不足。
Deals with the process of reverse engineering, Expatiate the key periods of reverse engineering for 3d measurement using reverse software to rebuild the surface and CAD modeling in detail.
对机械产品的反求过程进行了系统分析，对反求三维测量、利用反求软件进行曲面重构、及三维造型等反求工程中的关键技术阶段进行了详细的探讨。
Deals with the process of reverse engineering, Expatiate the key periods of reverse engineering for 3d measurement using reverse software to rebuild the surface and CAD modeling in detail.
对机械产品的反求过程进行了系统分析，对反求三维测量、利用反求软件进行曲面重构、及三维造型等反求工程中的关键技术阶段进行了详细的探讨。
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