它像一个有两个参数的参数曲线。
研究了参数曲线上的一类仿射标架。
An investigation is made on an affine frame of parametric curves.
二是组合参数曲线的磨光。
讨论参数曲线近似弧长参数化的数值方法。
In this paper, a numerical method is presented for nearly arc length parameterization of parametric curve.
本文提出了参数曲线近似弧长参数化的一种插值方法。
This paper presents an interpolation methods for nearly arc length parameterization of parametric curves.
本文采用时间扫描方法，画出五种地震活动性参数曲线。
In this paper, five kinds of curves of seismic activity parameter ware drawn by temporal scan method.
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。
Shape preservation of parametric curves is associated with normalized total positivity of its basis functions.
提出了一种构造三次参数曲线对给定数据点插值的新方法。
A method for constructing a parametric cubic curve to interpolate a set of distinct data points was presented.
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。
A new extension factor is constructed for free-form deformation of parametric curves.
并根据这两个性质，设计了一种提取参数曲线集最小闭环的算法。
Then an algorithm is designed for picking up Minimum Closed Loops from parameterized curve set based on these two properties.
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。
Using parametric curves, it substitutes the functional curves, replaces the continuous curves with sequential discrete points.
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。
B-Spline curves and curve surfaces are the most commonly used parametric curves and surfaces in Computer Graphics.
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。
The paper develops general interpolation principals for parametric curves with constant feedrate, and contour error's approximate evaluations are discussed also.
目前，参数曲线实时插补技术正在逐渐成为数控插补技术研究的一个热点。
At present, parameter curve real-time interpolation is gradually becoming a research hotspot of numerical control interpolation technology.
正则性是参数曲线曲面的重要代数性质，是由参数曲线曲面的参数化决定的。
Regularity is an important algebraic property of parametric curve and surface, which depends on the parameterization of parametric curve and surface.
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。
NURBS curves are among the most commonly used Parametric curves in CAGD and computer graphics.
本文利用多种测井曲线及其计算的地质参数曲线提取反映沉积微相的特征参数。
The characteristic parameters of sedimentary microfacies are extracted by using well logs and geological parameter curves.
也就是我在此平面上有一个参数曲线，所以问题就是，在任意给定时刻会发生什么呢？
So, I will have some parametric curve that lives on this surface so, the question is, what's going to happen at any given time?
基于参数曲线和曲面控制的空间变形是重要的几何外形编辑和柔性物体动画实现手段。
Space Deformations controlled by parametric curve or surface are important methods for geometric shape edit and flexible object animation.
给出了同阶差分格式线性组合的性质，从而可设计出更多收敛的多参数曲线细分格式。
Furthermore, the property of the linear combination of the difference schemes of the same order is analyzed, which can help to devise more convergent curve subdivision schemes with several parameters.
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。
Firstly, to the rectangle window, algorithms for clipping lines, circles and ellipses, as well as parametric curves are introduced.
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。
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.
在CAD参数曲线曲面造型方法中，混合曲线曲面技术正被广泛研究，本文分两大部分。
Among the modeling methods used in the CAD parametric curves and surfaces, the technique of blending curves and surfaces is being wildly study.
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。
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.
渗透率比值越接近，层间渗透率级差越小，采出程度评价参数曲线越平缓，变化幅度越小。
The closer the permeability ratio is and the smaller the permeability contrast is, the more gently the recovery evaluation parameter curve is and the smaller the range-ability of the curve changes.
参数曲线高速数控插补时，进给速度规划需要综合考虑机床动力学特性和曲线几何特征的限制。
Velocity planning for curved path interpolation in high CNC machining should be bounded by both dynamic properties of the machine tool and the geometrical properties of the curved path.
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。
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.
采用累加弦长三次样条参数曲线，先求出离散点处两个方向的切矢，进而求解出该离散点的法矢。
This paper presented the solution of normal vector by using the method of the accumulative hypotenuse trispline curve.
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。
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。
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.
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