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1)  arc-length parametrical curves
弧长参数曲线
1.
Based on arc-length parametrical curves,we discussed the geometrical properties for planar regular local convex curves,proved that the planar local convex curves locates on the right semi-closed(left semi-closed)plane of tangent line at arbitrary point on the curve,and derived a few important properties at any point on the curve.
基于弧长参数曲线的性质,讨论了平面正则参数局部凸曲线的性质,证明了平面正则参数局部凸曲线在曲线任意一点的切线的闭左半平面(闭右半平面),导出了局部凸曲线在逗留点处的几个重要性质。
2)  arc length of curve
曲线的弧长
3)  arc-length parameterization
弧长参数化
1.
By using reparameterization with a quadratic transformation on the parametric domain,an approximate arc-length parameterization method and the corresponding algorithm are presented for Bézier curves.
提出Bézier曲线的近似弧长参数化方法及相应的算法。
2.
A new quantitative measure of "closeness" to arc-length parameterization is presented and according to this measure, the problem of identifying the optimum rational reparameterization of a degree n polynomial curve is shown.
利用有理重新参数化的自由度求解参数曲线的最优参数化问题,提出一种度量曲线的参数速度与弧长参数化接近程度的方法。
3.
When a nearly arc-length parameterization[1] for a Bézier curve has been obtained,the parameterization could only acquire C0-continuity.
考虑近似弧长参数化Bézier曲线的逼近问题。
4)  parameter curve
参数曲线
1.
Note on geometric transformation of parameter curve;
关于参数曲线的几何变换的一个注记
2.
A pixel-by-pixel generating algorithm for polynomial parameter curves of degree 4 is presented.
提出一种生成四次参数曲线的算法 在生成曲线的过程中,采用增量计算有效地降低了计算量,并可动态调整步长,使生成的曲线达到像素
5)  parametric curve
参数曲线
1.
C~1 surface interpolation restricted to smooth parametric curve;
限制在光滑参数曲线上的С~1曲面插值
2.
In response to new challenges and difficulties in multi-axis CNC machining, the angular interpolation for parametric curves is proposed and the general principle is outlined.
基于五轴数控加工的运动的分析,提出了旋转插补及相关的概念,讨论了线性进给速度与旋转进给速度之间的关系,针对参数曲线,建立了沿曲线的角弧长导数与旋转进给速度之间的关系,基于泰勒级数展开构建了参数曲线的旋转插补方法及算法。
3.
A new real time interpolation algorithm for complex parametric curve, including high order polynomial curve, Bezier curve, B spline curve, NURBS curve, etc, was developed, which is based on Gauss Legendre quadrature and polynomial interpolation.
提出一种基于 Gauss- Legendre求积和多项式插值的复杂参数曲线 (包括高次多项式曲线、Bezier曲线、B样条曲线、NURBS曲线等 )实时插补算法 。
6)  parametric curves
参数曲线
1.
A Sectional Step-length Algorithm for Rasterizing Parametric Curves;
参数曲线的分段步长生成算法
2.
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。
3.
The expansion in U-series has advantageous properties for approximations in both quadratic norm and uniform,and it can be realized to exactly express a group of parametric curves and surfaces which are piecewise k-degree polynomials with limited number of terms of U-system.
基于U系统这一特点,给出了参数曲线、参数曲面图组的U谱信息转换算法,进而用于几何信息的分析与综合,并引入一个不变量——“能量”,利用它可以进行几何图组的分类。
补充资料:UG编缉曲线参数

除非共享这是那些常常被忽略不被发现的直观拾取中之一。


当利用 Edit ->Curve-> Trim 你通常选择边界对象,跳过一选择步然后选择被修剪的曲线。你自然地一次选择一条曲线。


如图所示,为了直观地拾取被修剪的曲线,可以在图形窗口中拖拽一矩形与被修剪区相交。

 

 

 矩形窗口选择

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条