中文摘要：

对三次Ferguson曲线进行了扩展，构造了拟三次Ferguson曲线，当改变形状参数入时，可以调控曲线的形状。它包含三次Ferguson曲线为其特例且具有三次Ferguson曲线的主要性质。文中还给出了拟三次Ferguson曲线的边界条件以及与几种常见的带形状参数样条曲线之间的转化矩阵。

英文摘要：

Cubic quasi-Ferguson curve was constructed through the extension of cubic Ferguson curve. The shape of the curve could be adjusted by changing the values of the shape parameter A. The new curve has the cubic Ferguson curve as its special case and possesses the main properties of cubic Ferguson curve. Boundary conditions of the cubic quasi-Ferguson curve and the conversion matrix between the curve and several kinds of spline era＇yes with shape parameter are also presented.