1) Ball equation
Ball方程
2) Ball base
Ball基
1.
In this paper,the 2m+2 order Ball bases and Ball curves with a shape parameter λ are constructed.
本文构造的带形状参数的2m+2次Ball基及Ball曲线具有和Ball基及曲线同样的性质,它可以通过调节形状参数λ值根据需要控制曲线形状,避免了通过改变控制点的位置来调整曲线的形状,而且参数值越大,曲线越光滑。
3) Said-Ball curve
Said-Ball曲线
1.
Approximate merging of a pair of Said-Ball curves;
两相邻Said-Ball曲线的近似合并
2.
An approximation method for multi-degree reduction of Said-Ball curves;
Said-Ball曲线的降多阶逼近
3.
Extension of quartic Said-Ball curve
四次Said-Ball曲线的扩展
5) Ball curves
Ball曲线
1.
Hyperbolic polynomials Ball curves.;
双曲混合多项式形式的Ball曲线
2.
A recursive algorithm for conversion of Bézier curves and Said Ball curves is presented, which is based on unified representation of Bézier curves and Said Ball curves.
根据 Bézier曲线与 Said- Ball曲线的统一表示 ,给出了 Bézier曲线与 Said- Ball曲线之间相互转换的递归算
3.
We give one method for multi-degree reduction of Ball curves.
给出了Ball曲线的一种降多阶逼近方法。
6) Wang-Ball basis
Wang-Ball基
1.
A new series of the generalized Ball basises of degree-n with parameter k ( 2 ≤ k ≤■n 2■ +1) are constructed as the transition from Wang-Ball basis (k=2) to Said-Ball basis (k= ■n 2 ■ +1), and some properties of them are given.
构造了一系列次数为n且带有参数k(2≤k≤■n2■+1)的新的广义Ball基,作为Wang-Ball基(k=2)到Said-Ball基(k=■n2■+1)的过渡,并给出新基的一些性质。
补充资料:ball valve
分子式:
CAS号:
性质:又称球心旋塞,球心阀。是旋塞阀的变形,启闭件(球形栓塞)绕垂直于通路的轴线旋转的阀门。阀门体内装有球体栓塞,栓塞中开有圆形通道,与旋塞比较,除旋塞之优点外,它可用于压力或温度较高而口径较大的管路。
CAS号:
性质:又称球心旋塞,球心阀。是旋塞阀的变形,启闭件(球形栓塞)绕垂直于通路的轴线旋转的阀门。阀门体内装有球体栓塞,栓塞中开有圆形通道,与旋塞比较,除旋塞之优点外,它可用于压力或温度较高而口径较大的管路。
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