An Algorithm for the Machine Computation of Partial-Fractions Expansion of Functions Having Multiple Poles

An Algorithm for the Machine Computation of Partial-Fractions Expansion of Functions Having Multiple Poles
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多极点函数的部分分数展开式的机器计算算法

DOI:
10.1109/t-c.1971.223099
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发表时间:
1971
影响因子:
3.7
通讯作者:
S. Godbole
S. Godbole
中科院分区:
计算机科学2区
文献类型:
--
作者:
S. Godbole

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函数F(s)/(s-a)m(m > 1)的部分分式展开涉及m个系数的计算,即(1 /i!)(diF(a)/dsi),0 ≤ i ≤ m-1。Wehrhahn [1]和Karni [3]提供了一种代数计算这些系数的方法。这里采取了一种新的方法,它涉及到近似一个多极附近的简单极点。该理论的发展原来有一个非常有趣的相似之处FFT算法。通过几个例子说明了该算法。典型的应用是找到具有多个极点的函数的逆拉普拉斯变换和任意函数H(z)在某个任意z= z 0处的高阶导数的求值。
The partial-fractions expansion of a function F(s)/(s-a)m, m > 1, involves the computation of m coefficients, namely (1 /i!)(diF(a)/dsi), 0 ≤ i ≤ m-1. Wehrhahn [1] and Karni [3] have provided a method for computing these coefficients algebraically. A new approach is taken here which involves approximating a multiple pole by neighboring simple poles. The theory developed turns out to have a very interesting resemblance to the FFT algorithm. The algorithm is illustrated by several examples. Typical applications are finding the inverse Laplace transform of a function having multiple poles and the evaluation of higher order derivatives of an arbitrary function H(z) at some arbitrary z=z0.
使用X射线相位成像法观察轮岛涂
DOI: --
发表时间: 2019
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影响因子: --
作者:
宮部さやか;藤井規史;藤本慎司;岡本博之,藤森茜,森川公彦,水野薫
通讯作者: 岡本博之,藤森茜,森川公彦,水野薫