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基于函数值的有理三次插值样条曲线的区域控制 被引量:6

REGION CONTROL OF A RATIONAL CUBIC INTERPOLATING SPLINE BASED ON FUNCTION VALUES
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摘要 将插值曲线约束于给定的区域之内是曲线形状控制中的重要问题.构造了一种基于函数值的分母为三次的C^1连续有理三次插值样条.这种有理三次插值样条中含有二个调节参数,因而给约束控制带来了方便.对该种插值曲线的区域控制问题进行了研究,给出了将其约束于给定的折线、二次曲线之上、之下或之间的充分条件.最后给出了数值例子. To constrain the interpolating curves to be bounded in the given region is an important problem in curve design. A rational cubic interpolating spline based on function values and with cubic denominators is constructed. Sufficient conditions for the interpolating curves to be above, below or between the given broken lines or piecewise quadratic curves are derived. Two examples are given in the end of this paper.
出处 《计算数学》 CSCD 北大核心 2008年第2期167-176,共10页 Mathematica Numerica Sinica
基金 国家自然科学基金(20206033) 湖南省自然科学基金(06JJY4073) 湖南省教育厅科研(06C791) 长沙市高新技术项目(K051127-72).
关键词 计算机应用 曲线设计 有理插值 三次样条 computer application, curve design, rational interpolation, cubic spline
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参考文献18

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