Through adjusting shape parameters, one can design the curve interactively and by giving appropriate values to shape-preserving parameters, one can get a monotonic interpolant. 通过调整形状参数可交互式修改曲线形状，适当选取保形参数曲线是保单调的。
Based on the analysis and evaluation of wrinkle shape, a parameter to study.the side-wall wrinkling problems in deep drawing of axisymmetrical curved parts is determind. 在分析与评价几种表述皱纹形状参数的基础上，确定了适用于研究轴对称曲面类零件侧壁起皱问题的皱形参数。
