查询词典 CAD

A recognition method of discrete points on trimmed surface is presented, which is based on the plane domain of surface parameter. The approach changes the recognition from the complex 3D space to the simple parameter plane artfully.

针对目前常用商业CAD系统在复杂参数曲面有效离散方面所存在的不足，结合实际工程设计与应用方面的需要，提出了一种基于二维参数域的裁剪曲面有效离散点的识别方法。

Plication , as well as t he importance of CAD in application of NC machine.

应用效益的技术途径及计算机辅助设计在数控机床应用中的重要作用。

In order to develop visual mechanical design software with the functions of design computing , database management and automatic graph plotting, this paper studies the multi-platform technologies such as Visual Basic 6.0, Visual FoxPro 6.0, Visual LISP and AutoCAD, in which interface programming, directory structure design and rational use of platforms areincluded.

为开发具有设计计算、数据库管理和自动制图功能的可视化机械设计软件，对Visual Basic6.0、Visual FoxPro6.0、Visual LISP和Auto CAD多平台开发技术进行了研究。该技术主要包括接口程序设计、目录结构设计和平台的合理使用。

Feature identification is different according to curvature calculated with laser scanning data point in different size window.

为建立反映产品设计意图和支持产品创新设计的逆向工程CAD模型提供了一个明确的建模思路。

This paper introduces the concept of automated intelligent tire design as basis, and then systemically presents the general framework of CAD 3-D digital tire model design platform. Its modules include the demand representation, demand preanalysis, product list generation, product list modeling, testing, tires knowledge-base and tire parts-base. The realizing process and key techniques of the product list modeling module are described, including calculation principle of groove section and groove modeling scheme ,and so on. This paper also introduces an improved algorithm of calculating groove centerline. Finally CATIA platform and VBA toolkit-based tire design system is established under detailed demand representation type.

在提出自动化智能轮胎设计概念基础上，系统地阐述了计算机辅助设计三维轮胎数字化模型开发设计平台的整体架构，包括需求表示、需求分析预处理、产品清单生成、产品清单造型、产品检验、轮胎知识库和轮胎零件库等模块；叙述了数字轮胎设计造型模块的实现过程和关键技术，包括花纹沟截面计算原理和各种花纹沟的造型方案等，同时，还提出了一种改进的计算花纹沟中心线的算法；最后基于CATIA三维造型平台和自动化语言VBA二次开发工具实现了在详细需求表示类型下的轮胎设计系统。

For example, quadratic curve and quadric surface are used as primitive element in most modeling/CAD system. The implicit formulae for computing the intrinsic geometric invariant??

随着对参数曲线曲面研究的深入，早在80年代初苏步青教授等就将几何不变量的研究引入并应用到参数曲线、曲面的研究中，取得了重要的成果［1？

Technology and security from the comparison, the use of CAD software graphics rendering process flow chart of the hydrochloric acid.

通过从工艺和安全上的比较，绘制了盐酸的工艺流程图。

This integral product data model must not only include the data of a product itself but also the data of design processes and design activities.

对于它们的研究与应用，有助于我们提高目前CAD系统的实用性及自动化程度，同时也为计算机集成制造系统提供一个良好的产品设计与加工的集成框架。

In addition, SGID will acquire approximately 10.9 million Quadra Mining shares at a per-share price of CAD 13.91 (US$13.55), in exchange for a 9.9 percent stake in the company.

另外，SGID将以每股13.91加元（13.55美元）的价格收购大约1090万股Quadra Mining股票，从而持有该公司9.9％的股份。

Some questions in digital elevation model were discussed detailedly, such as the obtaining of data points, the fast searching of reference points, the interpolation algorithm of quadric surface, the abnormal data eliminating, and so on. And this paper has realized the 3D vectorization of 2D terrain maps, the 3D display and edit of DEM data with the help of secondary development of CAD.

文中详细讨论了数字高程模型中数据点获得、参考点的快速搜索、二次曲面的插值算法、粗差剔除等内容，并运用AutoCAD二次开发技术，实现了二维地形图的三维矢量化以及DEM数据的三维显示和编辑修改。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失