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However, the smoothness and convergence of these methods are not satisfactory. Because cubic spline function can be a piecewise, and its second order derivative is continuous, it is smooth and convergent.

但以上算法的光滑性和收敛性不好，而三次样条函数具有连续的二阶导数，且可采用分段函数的形式，具有很好的光滑性和收敛性。

GA is used to obtain coefficients of cubic spline function fitting to avoid the inverse of the matrix and some work is made with an example.

文中将GA用于三次样条函数拟合的系数求解，避开了矩阵求逆的繁琐问题，结合具体例子作了一些探索。

A rational cubic interpolating spline based on function values and with quadratic denominators is constructed.

构造了一种基于函数值的分母为二次的C1连续有理三次插值样条。

This procedure using cubic spline to be smooth margin function programming curve.

详细说明：本程序利用三次样条差值函数编程得到顺滑的曲线。

A cubic spline function was deried from these points.

通过这些点，我们得到了其垂直方向的立体图象。

In view of the problems in the traditional highway vertical curve design,the cubic interpolation spline function replacing the conventional curve is proposed and the formula of function is demonstrated.

针对传统的公路竖曲线设计中存在的一些问题，可提出使用三次插值样条函数来替代传统线形的思路。

A software code was programmed based on the established panel arrangement principles and the special cubic spline function.

基于该程序所生成的网格，更能体现船体实际形状，并能为兴波阻力计算程序提供高质量的网格。

With thw cubic B spline function treated as displacements, the spline element stiffness matrix is established based on the principle of minimum potential energy.

用3次B样条函数来构造结构的位移模式，基于最小势能原理导出了桥梁结构的样条单元刚度矩阵。

Lastly,the distortion's rules fitted by cubic spline function were used to restore the distortion image captured by the same visual system.

最后，用该样条函数拟合的桶形畸变规律对同一个视觉系统拍摄的变形图像进行恢复。

For acquiring the mean line of workpiece profile,a new kind of digital smoothing filter based on cubic generalized spline function was proposed.

为了提取工件表面轮廓中线，给出了一种基于三阶广义B样条函数的数字光滑滤波器。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。