摘要
通过二阶常系数微分算子的零空间及其初值问题解的唯一性,引入了广义B样条曲线的概念,给出了B样条曲线的一种统一表示形式,介绍了该样条的求值算法及节点插入算法,并对其凸包性质和变差缩减性质作了分析,最后给出了相应算例。数值实验表明:该算法对任意样条都适用,且结果准确、有效。
A new representation to splines is introduced and the concept of generalized B-sphnes is presented by considering the null space of a second order constant coefficient differential operator and the unique solution to an initial-value problem; it shows the evaluation algorithm and knot insertion algorithm for generalized B-splines and analyses convex-hull property and variation-diminishing result. At last, some examples show that the algorithm is valid to all kinds of splines.
出处
《华东理工大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2007年第1期141-144,148,共5页
Journal of East China University of Science and Technology
基金
天津大学-南开大学刘徽应用数学研究中心资助项目
关键词
广义B样条曲线
凸包性质
变差缩减性质
求值算法
节点插入算法
generalized B-splines curve
convex-hull property
variation-diminishing result
evaluation algorithm
knot insertion algorithm