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d curved surface
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  三维曲面
     This article in detail introduced based on the BP nerve network technology human body three dimensional imaging system of the optical measurement hardware and the data gain, and how to train the reverse dissemination nerve network (BPN) to determine the system mapping function, as well as human body 3D curved surface imaging.
     本文详细介绍了基于BP神经网络技术的人体三维成像系统的光学测量硬件、数据获取,如何训练反向传播神经网络(BPN)确定系统映射函数,以及人体三维曲面成像的方法。
短句来源
     A kind of the laser and CCD optigonometry automatic position shifting measuring method for the auto body 3 D curved surface shape is presented in this paper.
     介绍了一种将激光和CCD用于测量汽车等大型三维曲面形状的光学三角自动变位测量方法。
短句来源
     Non-contact 3D Curved Surface Measurement
     非接触三维曲面测量
短句来源
     In this way, this proposed algorithm takes merits of the combination of edge detection and region growth to realize the accurate boundary location of 3D curved surface.
     该算法将边缘检测应用于区域生长规则中,充分发挥了边缘方法和区域生长方法两者的优点,实现了三维曲面边界的精确定位。
短句来源
     Finally, through modulated system the object’s 3D curved surface data is obgtained.
     最后通过已标定的系统获取物体的三维曲面数据。
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  3维曲面
     With Discrete Fourier Transforms description of 3D curved surface, transform function of forming process is discussed.
     在多点成形过程中 ,3维曲面形状的离散傅里叶变换描述能够反映成形件的整体变形特性。
短句来源
  “3 d curved surface”译为未确定词的双语例句
     The laser speedy auto measurement system for 3 D curved surface
     弱激光-DNA分子相互作用的加周期分支与阵发性混沌
短句来源
     3D Curved Surface Non contacting Measuring System with Phase Method
     相位法三维型面非接触检测系统
短句来源
     The fuzzy control method in multi-point closed-loop forming for 3D curved surface parts
     板类件多点闭环成形的模糊控制方法
短句来源
     Through applying reverse design to car body covering, obtains 3D curved surface reconstruction of car body covering. this project establishes the base of further design of successive CAD/CAM systems.
     通过对车身覆盖件应用逆向设计,实现了车身覆盖件 3D 曲面重构,为后续的 CAD/CAM 及在此基础上新产品的二次开发奠定了基础。
短句来源
     This paper deals comprehensively with holographic and moire contour technoopes, optical triange and coordinate metheds for non-contact 3D curved surface measurement.
     本文综述了非接触三雄由面测量的全息等高技术、莫尔等高技术、光三角法及坐标测量法。
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  d curved surface
A combination of cubic interpolation and boundary matching is employed to reconstruct the 3D curved surface that passes through selected key points.
      
It's the first full 3D curved surface Mold SDM part.
      


This paper describes 3-D curved surface, such as wave-surface etc, on 2-D plane by using hidden-line method. Beginning with 3-D projection and then gra- phics adjustment, it plots the viewing image by linking up the two points with hidden-line. In order to satisfy the need of tremendous numerical simulation, a FORTRAN module program is developed.

本文用带消隐线的方法在二维平面上来描绘三维曲面,例如波表面等。从投影基 础和图形调整入手,采用了点间连线的方法实现曲线模拟和线的消隐。为了适用大型 数值模拟的需要,编制了 FORTRAN模块程序。

This paper introduces a microcomputer program system for seaplane float contour design system——FCDS. A float contour is a complex 3-D curved surface which must satisfysome requirements about hydrostatical and hydrodynamical performances. In FCDS. a model picked from the model bank is taken as the foundation for generating a contour surface, which makes the further design of the surface have some warranties in hydrodynamics. A non-uniform rational B-spline is adopted to fit the cross designed...

This paper introduces a microcomputer program system for seaplane float contour design system——FCDS. A float contour is a complex 3-D curved surface which must satisfysome requirements about hydrostatical and hydrodynamical performances. In FCDS. a model picked from the model bank is taken as the foundation for generating a contour surface, which makes the further design of the surface have some warranties in hydrodynamics. A non-uniform rational B-spline is adopted to fit the cross designed curves and surfaces, on which not only the multiple-knot and multiple-vertex techniques based on a common polynomical non-uniform B-spline can be inherited, but also the ability of regulating shape will be increased. Besides, conies and conicoids can be integrated into a cubic ratio- nal expression. In the system. the function of fairing space curves and surfaces with the Hosaka method has been designed and the float contour can be faired so as to provide the contour data for direct application to manufacture.In this paper, it is also noted that the design conception and the structural form of CAD systems for specialized surface design such as FCDS are discussed. The universal conception of the system design makes FCDS possible be used for designing other aircraft component contours after being modified slightly.

本文介绍了一个水上飞机浮简外形设计的微机系统FCDS。浮筒外形是一张须满足流体静、动力等性能要求的复杂的三维曲面。FCDS以性能优良的库模型作为外形曲面生成的基础,使曲面的进一步设计有了一定的流体性能上的保证。系统用非均匀有理B样条来作曲线曲面的拟合和交互设计。不仅继承了普通多项式非均匀B样条重节点、重顶点等设计技巧,而且增加了形状调节的能力,同时可将二次曲线曲面统一在三次有理式中。系统提供了用穗坂卫法直接光顺空间曲线和曲面的功能,可对浮筒外形进行光顺处理,提供直接用于制造的数据。文中还对FCDS这类专业曲面CAD系统的设计构思、结构组成作了探讨。系统设计的通用性构思,使FCDS稍作修改即可用于其他飞机部件的外形设计。

Traditionally, the surface contour test instrument or three-coordinate measuring machine is used in 3-D curved surface measuring system. Now a laser triangle measuring device instead of test probe is installed on the three-coordinate measuring machine, but this method is still limited by the three-coordinate measuring machine itself. On the basis of a thoroughgoing study of the principle of laser triangle measuring method, a laser two-triangle measuring system for 3-D curved surface is described....

Traditionally, the surface contour test instrument or three-coordinate measuring machine is used in 3-D curved surface measuring system. Now a laser triangle measuring device instead of test probe is installed on the three-coordinate measuring machine, but this method is still limited by the three-coordinate measuring machine itself. On the basis of a thoroughgoing study of the principle of laser triangle measuring method, a laser two-triangle measuring system for 3-D curved surface is described.

测量三维曲面轮廓的传统方法是采用表面轮廓仪式或三坐标机。改进的方法是将激光三角测量头装在三坐标机上以代替触针,从而实现了非接触测量,但此法仍然受到三坐标机本身的限制。本文在深入研究激光三角测量原理的基础上,提出了一种三维曲面的激光双三角测量法,并给出了设计要点。

 
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