计算机辅助设计

The surface representation in discrete form and its differential computation are important issues in computer graphics and geometric design.

0引言一般来说，曲面的一阶微分量是指曲面的切平面方向和法向量，二阶微分量是指曲面的曲率等有关量·它们作为重要的曲面信息度量指标，在计算机图形学，机器人视觉和计算机辅助设计等领域发挥了重要的作用·传统的曲面是连续形式的参数曲面和隐式曲面，其微分量的计算已经有了较完备的方法·随着激光测距扫描等三维数据采样技术和硬件设备的长足进步，以及图形工业对任意拓扑结构光滑曲面造型的需求日益迫切，离散形式的曲面———细分曲面、网格曲面和点云曲面正在逐渐成为计算机图形学和几何设计领域的新宠·于是，对这种离散形式的曲面如何估

Design method of farm machine products drop behind the one of manufactured products. To make our countrys design and manufacturing technology of dead stock to achieve the standard of developed country, to develop parallel with other machine manufacture, this article introduce CAD, optimization design, computer simulation technique into the design of the ditcher, to make its design more reasonable, much higher quality to bring social benefit, economic benefit, ecological significance.

我国农业机械产品的设计方法相对工业产品来说比较落后，为了使我国农机设计制造技术达到发达国家水平，与其它机械制造业平行发展，本文将计算机辅助设计、优化设计、计算机模拟技术引用到该机具的设计中，使该机具的设计更合理、更高质，使它尽快地产生社会效益、经济效益、生态效益。

Laser refabrication is a kind of advanced technology. It combines mechanical engineering, optics, electron, computer, sensor technology, material and other subjects with laser cladding.

激光再制造是一门高精尖的技术，它综合了激光熔覆、计算机辅助设计/计算机辅助制造、计算机数字控制、物理、化学、材料等学科领域的先进成果，解决了传统加工工艺中的许多难题。

Detail drawing ; Dimension and tolerance representation ; Geometric epresentation ; Geometric modelling ; Information input processing ; CAD/CAM

零件图；尺寸公差；几何表达；几何造型；信息输入处理；计算机辅助设计/计算机辅助制造

In computer-aided manufacturing, the processed parametric curve and surface should be regular, so the parametric curve and surface generated by computer-aided design should be regular first.

在计算机辅助制造过程中，要求所处理的参数曲线曲面是正则的，前提是计算机辅助设计得到的参数曲线曲面是正则曲线曲面。

In this course, we will introduce the basic raster graphics algorithms for drawing 3d primitives, geometric transformations in 2D and 3D space, viewing in 3D, representing curves and surfaces, visual reality and computer animation.

并为今后从事计算机辅助设计和制造、科学计算可视化、计算机图形处理、图形算法的设计、图形软件的开发以及计算机动画、游戏开发等方面的研究工作和系统开发等打下良好的理论基础与实践基础。

This article proposed the slotter organization size computer-aideddesign, through to the bias crank slide organization size computation,establishes the mathematical model, uses the computer to carry on thecomputation, AUTO the CAD software cartography, enormously enhancedthe design speed and the design quality, for enhances the product thecompetitive ability, has provided the effective design method.

本文提出的插床机构尺寸计算机辅助设计，通过对偏置曲柄滑块机构的尺寸计算，建立数学模型，采用计算机进行计算，AUTO CAD软件绘图，极大提高了设计速度和设计质量，为提高产品的竞争力，提供了有效的设计方法。

Our company use CAD and CAM to design and produce the slewing bearing.

技术与装备公司采用计算机辅助设计和计算机辅助制造现代管理系统和手段进行回转支承的设计和加工。

We use CAD CAM technology designed or made by computer . We also have a lot of specialists and experts in oil pump product deigning craft designing and testing .

计算机辅助设计及辅助制造技术，具有一批从事机油泵产品设计，工艺设计，试验研究等各方面的专业技术人才和专家，有较强的设计，研制，制造机油泵和动力转向泵的工艺设备和技术能力。

Mold manufacturing cost is high, demand manufacturing cycle is short, and strong technical characteristics, at present, along with the continuous development of science and technology and computer applications, these problems have been greatly improved, thanks to computer-aided design and computer-aided machining , and fundamentally change the face of the mold and reliably guarantee the accuracy of the mold needs and quality of pre-hardened, easy-cutting and high brightness and so on, the new mold material applications, which will greatly facilitate the processing and heat treatment.

模具制造业存在成本高，要求制造周期短，技术性强等特点，目前，随着科学技术的不断发展和计算机的应用，这些问题得到了很大的改善，由于有了计算机辅助设计和计算机辅助加工，从根本上改变了模具生产的面貌，可靠地保证了模具所需要的精度与质量、预硬、易切削以及高光亮等，新型模具材料的应用，大大地方便了加工及热处理。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了