摘要
文章对文一个高精度积分公式作改进,用四个点和它们的一阶导数做加权平均,使得该公式的代数精度由五阶提高到七阶,并对该公式进行复化,然后推广到二重积分。数值实验结果表明:改进后的公式比原来的积分公式具有更高的精度。
In this paper,it improved a high accurate integral formula by weighted average with four points and their first derivatives.The new formula has 7th order accurate.And then,we compound it to obtain the compound formula,and extend these formulas to the double integrals.Numerical results show that the new formulas have higher accurate.
出处
《四川理工学院学报（自然科学版）》
CAS
2011年第2期168-170,共3页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
数值积分
复合公式
高精度
numerical integration
compound formula
high order accuracy
