积分表与级数: Seventh Edition

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"这是一本名为《积分、级数与乘积表》的第七版图书,由I.S.格拉代什坦(I.S. Gradshteyn)和I.M.里日赫克(I.M. Ryzhik)共同编写,并由艾伦·杰弗里(Alan Jeffrey)和丹尼尔·兹威林格(Daniel Zwillinger)担任编辑。书中详尽地列出了各类积分,包括常见的三角函数积分、指数函数积分以及超几何函数积分等,旨在为读者提供一个全面的参考工具。此书最初是用俄语编写的,并由Scripta Technica, Inc.翻译成英文。出版社为Elsevier的学术出版社(Academic Press),出版地点包括阿姆斯特丹、波士顿、海德堡、伦敦等地。该书遵循严格的版权规定,未经许可,不得复制或传播。" 这本书涵盖了积分计算的重要主题,对于学习和研究数学,尤其是微积分和高级数学的人来说是不可或缺的资源。积分是微积分的核心概念,用于求解面积、物理问题中的工作量、速度和加速度等问题。三角函数积分,如正弦、余弦、正切和余切的积分,是工程学、物理学和其他科学领域中常见的计算。指数函数积分涉及到自然对数e的幂,这些积分在解决各种增长和衰减模型时非常关键。 超几何函数积分则更为复杂,它们在理论物理学、统计力学以及数学的多个分支(如特殊函数理论)中有广泛应用。超几何函数是一类在解析和数值计算中都相对复杂的函数,其积分形式通常涉及无限级数和特殊函数的组合。 书中还包含了级数的内容,级数是数学分析中的另一个基础概念,它用来表示无限项的和。级数可以是收敛的,也可以是发散的,理解其性质对于求解复杂数学问题至关重要。此外,乘积表可能包含特定函数序列的乘积公式,这对于理解和处理复杂数学序列和级数非常有用。 总体来说,《积分、级数与乘积表》是数学工作者和学生的重要参考资料,提供了大量的积分和级数计算公式,有助于快速准确地解决问题。无论是初学者还是经验丰富的专业人士,都能从中受益,提高计算效率并深化对积分和级数理论的理解。

For macroscopically anisotropic media in which the variations in the phase stiffness tensor are small, formal solutions to the boundary-value problem have been developed in the form of perturbation series (Dederichs and Zeller, 1973; Gubernatis and Krumhansl, 1975 ; Willis, 1981). Due to the nature of the integral operator, one must contend with conditionally convergent integrals. One approach to this problem is to carry out a “renormalization” procedure which amounts to identifying physically what the conditionally convergent terms ought to contribute and replacing them by convergent terms that make this contribution (McCoy, 1979). For the special case of macroscopically isotropic media, the first few terms of this perturbation expansion have been explicitly given in terms of certain statistical correlation functions for both three-dimensional media (Beran and Molyneux, 1966 ; Milton and Phan-Thien, 1982) and two-dimensional media (Silnutzer, 1972 ; Milton, 1982). A drawback of all of these classical perturbation expansions is that they are only valid for media in which the moduli of the phases are nearly the same, albeit applicable for arbitrary volume fractions. In this paper we develop new, exact perturbation expansions for the effective stiffness tensor of macroscopically anisotropic composite media consisting of two isotropic phases by introducing an integral equation for the so-called “cavity” strain field. The expansions are not formal but rather the nth-order tensor coefficients are given explicitly in terms of integrals over products of certain tensor fields and a determinant involving n-point statistical correlation functions that render the integrals absolutely convergent in the infinite-volume limit. Thus, no renormalization analysis is required because the procedure used to solve the integral equation systematically leads to absolutely convergent integrals. Another useful feature of the expansions is that they converge rapidly for a class of dispersions for all volume fractions, even when the phase moduli differ significantly.

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