NURBS

A tool path generation method is presented for NC machining based on vector analysis and NURBS.

描述了基于矢量分析和NURBS的数控加工轨迹设计方法.

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The geometric significance of weights in NURBS curves is introduced.

介绍了NURBS曲线权因子的几何意义.

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Both the profile and the path can be a B é zier or a NURBS curve.

轮廓线和路径可以是贝兹曲线或者是NURBS曲线.

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It is most obvious that NURBS surfaces are much harder to control than Bezier surfaces.

这是最明显的表示,NURBS曲面是更加难以控制,比贝塞尔曲面.

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NURBS surfaces are among the most commonly used parametric surfaces in CAGD and Computer Graphics.

NURBS曲面是计算机辅助几何设计和计算机图形中最常用的参数曲面.

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The topic develops a set of CNC cutting machine with good stability and high reliability under the guiding of the open-architecture CNC theory, it has automatic programming function and NURBS curve interpolation. Firstly, build system hardware platform.

本课题以开放式数控结构形式为指导思想，开发出一套具备自动编程功能和NURBS曲线插补功能的稳定性好、可靠性高的切割机数控系统。首先，火焰切割机数控系统软硬件平台的搭建。

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This paper represents a concept of simplified dynamic NURBS swung surfaces for physics-based shape design.

提出了基于物理型面设计的准D-NURBS摆转曲面的概念.

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On RCS Computation Using Asymptotic PO with Surface Modeled by NURBS

基于NURBS建模和渐近物理光学的RCS计算研究

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NURBS is the main surface representation method in present CAD system.

目前的CAD系统主要采用NURBS曲面表示方法.

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A NURBS surface based error compensating arithmetic was proposed for the aberration of the imaging system.

针对成像系统畸变,给出了基于NURBS曲面的误差补偿算法.

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This paper presents a interpolation algorithm based on NURBS ( Non-Uniform Rational B Spline ).

文章提出了一种基于NURBS曲面的五轴联动插补算法.

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The mathematical model of steam vane is established with 2 × 3 degree nurbs method to improve the quality and efficiency of vane machining. The expression of three-dimensional point and unit vector matrix are put forward and the numeric show of vane is realized.

为了提高汽轮机叶片数控加工的质量和效率，用2×3次非均匀有理B样条方法，建立了叶片的数学模型，推导了其三维点和法矢量矩阵表达式，实现了叶片的数字化表示。

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A NURBS surface fitting method with tight tolerance for wrap-around models is presented.

提出了一类卷曲模型的NURBS曲面建模新方法。

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Constrained shape scaling of trimmed NURBS surface and a new target function

带约束的曲面放缩变形及一个新的目标函数

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A method of NURBS interpolation was developed.

提出了一种NURBS曲线 快速插补的改进算法.

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Geometric description and mesh generation for three dimensional space surface based on NURBS

基于NURBS方法的三维型腔曲面的几何描述及网格域的生成

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The result shows that NURBS modeling is the final technical project to complete the task of design and modeling, for it has the best balance in accuracy? control and system resources impropriate rate.

NURBS建模手段因在精确性、控制性和系统资源占用率的平衡性最优而确定为最终技术方案，以完成设计与建模任务。

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In fourth chapter, firstly we analyze theory of curve saw working and give a theory, which approach NURBS by lines.

第四章中首先分析曲线带锯的锯切工艺，之后我们给出了用折线逼近NURBS的理论基础并且我们给出了误差分析。

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Secondly, this text introduces some theories about NURBS curve.

其次，本文介绍了CAD技术NURBS自由曲线曲面造型的原理。

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Analysis and Control of Inflection Points on NURBS Curves via Control-polygon

囿于控制多边形的NURBS拐点分析与控制

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Expressed by NURBS, a method for building plane and space triarc is presented.

采用NURBS表示给出了一种在平面和空间中建立三圆弧的方法.

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The theory and experiment of curve and face of NURBS were explored and validated by experiment.

对NURBS的曲线曲面造型进行了理论和实验探讨，并通过实验加以验证。

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The content of this part included the general theory of parameter curve, B é zier curve theory and its algorithms, B-spline curve theory and its algorithms, NURBS curve theory and its algorithms.

内容包括参数曲线的一般理论、Bézier曲线理论和算法、B样条曲线理论和算法、NURBS曲线理论和算法。

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NURBS curves are among the most commonly used Parametric curves in CAGD and computer graphics.

NURBS曲线是计算机辅助几何设计和计算机图形中最常用的参数曲线.

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In this paper , the weighted factor of the Non-Uniform Rational B-Sample ( NURBS ) is analyzed and researched.

对非均匀有理B样条 ( NURBS ) 的权因子作了分析研究.

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Shape modification of NURBS curves and surfaces is one of the most crucial techniques in CAGD.

NURBS曲线曲面形状修改一直是CAGD中的关键技术之一,对该问题的研究具有十分重要的理论意义和应用价值.

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B-Spline and NURBS curve are ones that are applied widely.

样条和NURBS曲线是广泛应用的样条曲线.

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Based on the NURBS technique and the theory of partition for geologic body, the 3-D engineering geologic model for underground structures is established.

工程区域地质条件是影响地下洞室群布置最主要的因素。本文基于NURBS技术和地质结构单元实体分割理论，建立了工程地质三维整体模型。

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Aiming at structure's data precision, it discusses NURBS modeling method in technical details, analyzes different fan blade's surface structure character and the programming design method during construction;

针对造型的数据精度问题，详细讨论了NURBS建模方法的技术细节，分析了不同叶片曲面的结构特点，及造型过程中应采取的程序设计思路；

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An algorithm for Non-uniform Rational B-Spline ( NURBS ) surface trimming was proposed.

提出一种用于 非均匀 有理 B样条曲面裁剪的算法.

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