查询词典 cad

The representative minority cultural relic-pottery relic of Buyi minority and the two wooden masks is taken as the research object. Firstly, Hiscanner laser scan detector was adapted for data collection, and then obtain point cloud data which could be recorded on disc for permanent saving was obtianed; Furthermore, the new popular reverse engineering software Geomagic for some disposals of point cloud data was adopted in data condensing, data mending, data filtering, feature line picking up to obtain NURBS surfaces; and then the error between the reconstructed CAD model and the point cloud data was evaluated to guarantee the precision of surface reconstruction to keep the relics keep its original appearance. In the end, the NURBS surfaces are imported to 3D software Solidworks and entities of CAD are generated by surface sewing, mold loft and ablating and other instructions.

选用有代表性的贵州少数民族文物―布依族酒壶、水壶以及木制傩戏面具作为研究对象，采用Hiscanner激光扫描测头对其进行数据采集，扫描得到的点云数据可刻录到光盘上作为文物数据永久保存；更进一步地，采用目前流行的逆向工程软件Geomagic studio对点云数据进行数据精简、数据滤波、数据修补、提取特征线等处理后得到NURBS曲面；为保证曲面模型重建的精度，在曲面重建模型后对其误差评价，通过控制误差的方式指导曲面模型重建，使重建的文物曲面模型能真实完整地反映原状；最后，在功能强大的三维造型软件Solidworks中导人重构的NURBS曲面进行曲面缝合、放样等，将其生成实体CAD模型，并对模型的局部特征进行适当的再设计以实现文物实体模型的优化。

Direct against the defects of high cost,complicated computation and fixed accuracy of calculation on cabin capacity based on CAD software,a kind of cabin capacity computing method based on nodal point,which stands alone to the CAD system,was realized.

针对基于CAD软件的船舱容量计算成本较高、计算复杂、并且精度固定的缺点，实现了一种独立于CAD系统，基于型值点的舱容算法，用较低的成本，就可以方便快速地计算出船舱中液体的容积。

Based on CAD/CAM/CAE software——I DEAS Master Series,the standard feature library suitable to accumulator type unit injector is built up.A research on its variable structure,parametric design and 3 dimensional structure FEA is carried on with advanced CAD/CAE technique.It ensures the successful design of accumulator type unit injector.

本文基于大型CAD／CAM／CAE软件I－DEASMasterSeries，采用先进的CAD／CAE技术，建立了适于蓄压式泵喷嘴的标准特征库，对其进行变结构、参数化设计及3维有限元结构计算研究，为蓄压式泵喷嘴结构的设计成功提供了可靠的保证。

The main contributions are included as follows: the first, the research of technology of parametric model and establishment of part library, the second, the study of the technology of automatic assembly, the third, the study of functions of Unigraphics and approach of quadratics exploitation of UG .Used this technology in transmission CAD system, the fourth, the establishment of the parametric transmission CAD system using technology of automatic assembly.

本课题主要工作包括以下几个方面：第一，研究分析参数化特征造型技术的理论，并且将此理论应用于零件库的建立，总结零件库的多种实现方法；第二，分析研究机械产品自动装配技术的实现；第三，研究分析UG软件的功能和对其进行二次开发的途径和技巧，以及该软件在变速器CAD系统中的应用；第四，将参数化特征造型技术和自动装配技术的理论，结合UG软件的二次开发，应用于变速器CAD系统中。

In order to improve the effect of image and the exactitude of vectorization, this dissertation supplies raster image edition and vector graphics edition, which can make pixel operation and amend image vectorization results. At the same time it supplies the image transform to the form of CAD and can be edited and modified in the condition of CAD.This dissertation has just carried on the simple try in the Engineering drawing ectorization respect, too.

为了进一步提高图像处理的效果和矢量化的准确度，本文在图像处理阶段和自动矢量化后阶段均提供了简单的编辑功能，既可以对图像进行像素级操作，也可以对矢量化过程中产生的失真现象进行修正；同时给出矢量化数据到CAD软件的图形格式转换接口，从而有利于和CAD环境的无缝联接。

University of Saskatschewan, Saskatoon, Canada Abstract In this paper a new generation of methodology of CAD is used to develop the design and CAD system of modular robots.

摘 要 本文利用新一代计算机辅助设计方法，开展模块机器人的设计方法论和CAD系统的研究，旨在提出解决柔性加工系统的计算机辅助设计智能软件的思路和框架。

A divided B-spline surface model of shoe tree is founded, which offered the sound tree model for the shoemaking CAD/CAM. The calculating equation for control points of the bottom of the shoe tree is established for first time. A new method called LID to construct lateral and front surfaces of the shoe hell is proposed which furnishes the possibility for the hell CAD.

本文建立的楦体分块B样条曲面模型，为制鞋CAD/CAM提供了良好的楦体模型；首次建立并给出了楦底控制点计算方程和楦底分块Bezier曲面模型，奠定了鞋跟鞋底造型的基础；文中提出的设计鞋跟跟口面和跟侧面的LID方法，为鞋跟造型提供了实现可能性。

NET development of interactive CAD system book of the source code, is an interactive CAD s...

NET开发交互式CAD系统》书本的源程序代码，是实现交互式CAD系统开发的基础。

In chapter 4, basing theories and methods of scientific visualization, and artificial neural network BP algorithm, we integrate the Visual C++, OpenGL graphics library and Excel VBA technique to develop the program of artificial neural network and to make the BP algorithm visually, this program works can be divided into four parts: Using C language to develop program about BP algorithm; Using Visual C++, develop the GUI Interface, make input parameter visually; Using OpenGL graphic technique to display the training sample point in three dimension; at last using Excel DDE technique display the error graphic tables in Excel system In chapter 5, on the view of engineering application, we establish new method of surface reconstruction basing artificial neural network, develop interface program between module and commercial CAD/CAM system, meantime deeply discuss some key problems, for example, setting up the base plane, using the API technique, cutting and editing surface boundary, and also discuss the more compliant problem: how to intersect surface, at end we finish the work of translation from our surface reconstruction module to commercial CAD/CAM system, then make reverse engineering system basing artificial neural network more useful.

第四章基于科学计算可视化理论，依据人工神经网络BP算法理论模型，综合Visual C++，OpenGL图形库以及Excel VBA等多项软件开发技术，编制了人工神经网络程序，实现了BP算法的可视化映射。具体工作分为四部分：利用C语言实现人工神经网络BP算法；利用VisualC++的GUI技术开发图形用户界面，实现参数设置可视化；利用OpenGL图形技术进行三维映射，显示学习样本及训练样本点；利用微软电子表格DDE动态数据交换技术，在Excel上动态显示学习误差曲线图。第五章从工程应用的角度出发，提出了一种新的基于人工神经网络算法的曲面裁剪重构方法，完成了曲面重建模块与通用CAD/CAM系统的接口设计工作，对其中的若干关键问题进行了深入讨论，例如基平面设定、API技术的应用、边界裁剪等问题，同时，对曲面计算中较为困难的曲面相交问题也进行的专门探讨，最终完成了曲面重建模块向CAD/CAM系统的数据传输工作，使人工神经网络逆向工程系统趋向实用。

Lipid-regulating therapy has reduced CAD morbidity and mortality, changed CAD course, prevented formatting atheromatosis, postponed progressing of shaped disease, or even inversed it.

调脂能降低冠心病的发病率和病死率，改变冠心病的病程，预防动脉粥样硬化病的形成，使已形成的&病变&进展延缓，甚至逆转。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？