一类一阶导数的数值积分规则

M. A. Al-Alaoui
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引用次数: 13

摘要

提出了一种新的求正交公式族的方法。新家族的第一个成员是修正的梯形法则。将修正后的梯形定则和Simpson三分之一定则进行插值,得到了第二项二段定则。将修正后的梯形定则和辛普森三八定则进行插值,得到了第三个成员——三段定则。第四个成员是四段规则,将两段规则与布尔规则插值得到。通过将所提出的积分规则与牛顿-柯特规则适当地内插,从而消去欧拉-麦克劳林误差公式中的一个附加项,可以继续生成一整类积分规则。生成的规则正确地整合小于或等于n+3(如果n是偶数)和n+2(如果n是奇数)的多项式度,其中n是单个应用程序规则的片段数。所提出的规则具有优异的舍入性质,接近于梯形规则。新家族的成员通过两个额外的功能评估获得与在将Romberg积分应用于Newton-Cotes规则时将段数量加倍所获得的相同的错误顺序。所提出的家族的成员被证明是可行的替代高斯正交。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A class of numerical integration rules with first order derivatives
A novel approach to deriving a family of quadrature formulae is presented. The first member of the new family is the corrected trapezoidal rule. The second member, a two-segment rule, is obtained by interpolating the corrected trapezoidal rule and the Simpson one-third rule. The third member, a three-segment rule, is obtained by interpolating the corrected trapezoidal rule and the Simpson three-eights rule. The fourth member, a four-segment rule is obtained by interpolating the two-segment rule with the Boole rule. The process can be carried on to generate a whole class of integration rules by interpolating the proposed rules appropriately with the Newton-Cotes rules to cancel out an additional term in the Euler-MacLaurin error formula. The resulting rules integrate correctly polynomials of degrees less or equal to n+3 if n is even and n+2 if n is odd, where n is the number of segments of the single application rules. The proposed rules have excellent round-off properties, close to those of the trapezoidal rule. Members of the new family obtain with two additional functional evaluations the same order of errors as those obtained by doubling the number of segments in applying the Romberg integration to Newton-Cotes rules. Members of the proposed family are shown to be viable alternatives to Gaussian quadrature.
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