An investigation is made on an affine frame of parametric curves.
研究了参数曲线上的一类仿射标架。
A new extension factor is constructed for free-form deformation of parametric curves.
构造了一种新的伸缩因子函数，以改进参数曲线自由变形方法。
Chapter 4 USES barycentric subdivision method on arbitrary discrete parametric curves net.
第四章考虑上述的重心加细方法，将之应用于任意的离散参数曲线网上。
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。
Some graphic examples of check test for expressing a group of parametric curves in U-system are given.
提供了用u -系统表达参数曲线图组的实验图例。
This paper presents an interpolation methods for nearly arc length parameterization of parametric curves.
本文提出了参数曲线近似弧长参数化的一种插值方法。
Shape preservation of parametric curves is associated with normalized total positivity of its basis functions.
参数曲线的保形性与生成它的基函数的规范化全正性有关。
B-Spline curves and curve surfaces are the most commonly used parametric curves and surfaces in Computer Graphics.
样条曲线曲面是在计算机图形学中应用最广泛的参数曲线曲面类型。
It introduced imitating surfaces with bicubic parametric curves, feed length, cutter location and vector of cutter location.
介绍用双三次参数曲线拟合曲面、平头铣刀的直径、铣削的步长及行距选择、刀位点和刀轴矢量的计算。
Using parametric curves, it substitutes the functional curves, replaces the continuous curves with sequential discrete points.
该方法以参数曲线代替单值函数曲线，以序列离散点代替连续曲线。
Firstly, to the rectangle window, algorithms for clipping lines, circles and ellipses, as well as parametric curves are introduced.
首先对于矩形窗口，介绍了直线裁剪算法，圆和椭圆裁剪算法以及参数曲线的裁剪算法。
For the pixel-level generation of parametric curves, we find that the point densities chosen by the existing algorithms are not even along the curves.
对于其中的参数曲线的逐点生成，目前的算法在绘制曲线的过程中会出现所绘制点疏密不均的现象。
We generated parametric curves in the normalized parameter field and planned the measure-points on parametric curves according to the chordal tolerance.
同时利用规范化参数域生成等参数线，并按照弦公差方法在等参数线上规划测量点；
The paper develops general interpolation principals for parametric curves with constant feedrate, and contour error's approximate evaluations are discussed also.
阐述了参数曲线恒速插补的通用原理，同时讨论了轮廓误差近似计算方法。
OK, so let me show you a nice example of why we might want to use vectors to study parametric curves because, after all, a lot of what's here you can just do in coordinates.
我来举个例子，解释为什么我们用向量来学习参数曲线，毕竟我们学了这么多的都只能在坐标上完成。
Next, in the interior of the patches, surface fitting points and cross boundary derivatives are estimated from the reference curves by constructing virtual iso-parametric curves.
其次，在曲面片内部，曲面拟合点和边界方向导数可以从参考曲线中通过构建虚拟等参线的方法得到。
This paper presents an efficient algorithm for the implicitization of parametric curves defined by polynomial parametric equations, which is mainly based on the theory of matrices.
给出了多项式参数方程定义的参数曲线的有效隐式化算法，此算法主要是基于矩阵理论。
It is proved that the step-length of the new algorithm is better than those of the existing ones, so that the problem of oversampling in rasterizing parametric curves is solved better.
验证了新算法的步长值优于现有算法的步长值，从而进一步解决了生成参数曲线的取点过密问题。
However, due to the advantages of implicit curves and surfaces which the parametric curves and surfaces don't have, sometime we need to use the implicit form of a rational curves and surfaces.
然而由于曲线曲面的隐式形式具有参数形式所不具有的优点，有时我们还需要求参数曲线曲面的隐式表达式。
So, we have mostly focused on the use of parametric equations just for one dimensional objects, lines, and curves.
我们主要还是关注，参数方程的运用，主要是一维的，比如直线、曲线等。
The amplitude frequency response curves and their frequency properties of the parametric resonances are investigated by using the method of numerical analysis.
用数值方法分析了各种参数共振的响应曲线，其存在区域以及响应频率与脉动流频率之间的关系。
The washing basin parametric CAD module provides a series of dialogs and parametric part shape curves.
洗面器参数化CAD模块提供了一系列的对话框和各部件的参数化曲线。
The computation results show that the presented interpolation approach has better precision and versatility. And it can be used in parametric interpolation both for planar and spacial curves.
结果表明，该方法不仅具有较高的插值精度，而且通用性强，可适用于平面和空间曲线的参数化插值。
At first, the section curves of addendum is analysed, mathematic analytic models are established, the parametric design is finished and method to deal with especial questions is presented.
首先对常见的工艺补充面截面线类型进行分析，建立数学解析模型并进行参数化设计，并且给出特殊问题的处理方法。
A new algorithm for calculating the intersection curves between parametric surface and a plane is presented.
提出了一种参数曲面与平面的精确求交新方法。
A new algorithm for calculating the intersection curves between parametric surface and a plane is presented.
提出了一种参数曲面与平面的精确求交新方法。
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