计算机辅助

It''s composing of dafeng hongyang heavy industry machinery co., ltd and dafeng hongyang casting factory. the factory is located in the ocean of hangnail. many years the company has attracted a lot of the designer, technical workers, equip with high advanced cad of computer backup system.

下属大丰宏扬路桥重工机械有限公司、大丰市宏洋铸造厂两个企业，工厂位于美丽的黄海之滨，多年来汇聚了一支专业技术队伍，配备先进的cad计算机辅助系统、计算机模拟测试系统和德国进口光谱分析仪器。

The stress was the study of the new methods of calculation the harmonic voltage and the harmonic current, and a new concept of filter ratio to evaluate the actual effect of single harmonic filter was raised considering the background harmonics. As well, the calculation mode of the single harmonic filter was also given based on the concept of filter ratio; it can offer effect data to evaluate the actual filter ratio of the single harmonic filter. At the same time, a method of designing the single harmonic filter was given, too, considering the background harmonics of the power system. In this paper, both the computer analysis and the proven had been done. And the result was shown to be that the voltage aberration and the harmonic current were decreased, and that the actual filter ratio of single harmonic filter was raised. The reason that we must consider the background harmonics when designing a single harmonic filter was also expatiated in this paper.

重点研究了考虑电网背景谐波下谐波电压、电流的计算方法，提出了用滤波率来评价单调谐滤波器安装容量利用率的概念，基于滤波率，分别给出了不考虑、考虑电网背景谐波时，单调谐滤波器的计算模型，为定量分析和评价单调谐滤波器的实际补偿效果提供了依据：并以此提出了考虑电网背景谐波的单调谐滤波器计算机辅助优化设计方法，并经计算机仿真分析、论证，减少了负载母线谐波电压畸变率和注入系统的谐波电流，有效地提高了单调谐滤波器的滤波效果，阐述了单调谐滤波器的设计过程中要考虑电网背景谐波的理论和实际意义。

The similar drawing of the hyperbolic line is argument according to my experience with teaching, which is on the head surfaces of hex nut and used in the engineering drawings, through building three-dimensional model in AutoCAD.

本文通过在AutoCAD中建立三维虚拟对比模型，探讨了工程图样中六角螺母和六角螺栓头部外表面双曲线在计算机辅助设计中的近似画法问题。通过对比，论证了样条曲线替代圆弧近似双曲线改进画法在计算机绘图中的合理性和优越性。

Surface parametrization is one of important problems in computer graphics and computer aided geometric design.

曲面参数化是计算机图形学和计算机辅助几何设计中一个非常重要的问题。

Parametrization is a crucial problem in computer graphics,computer aided geometric design and digital geometric processing.

三角网格的参数化是对三角网格的几何和拓扑信息作进一步处理的基础，它在计算机图形学、计算机辅助几何设计和数字几何处理等领域有着广泛的应用。

Keywords Colon polypus;Tomography;X-ray computed;Image processing;computer-assisted

结肠息肉；体层摄影术； X线计算机；图像处理；计算机辅助

If there are local irregularities on the portions of the quartic Bézier curve, the irregular portions could be locally removed by adjusting the corresponding freedom degrees and redefining the corresponding slope vectors at the data points.

引 言构造插值曲线曲面是计算机辅助几何设计、计算机图形学和科学计算等领域中的重要研究内容之一。

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。

Computer application ; Computer aided design ; Solid rocket engine

计算机应用；计算机辅助设计；固体火箭发动机

Ulcerated gastric carcinoma ; Tomography ; X ray computed ; Computer assisted ; Digital image processing

溃疡型胃癌；体层摄影术； X线计算机；计算机辅助；数字图像处理

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。