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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2023-24-4-239-251</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1603</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Матричные интегральные преобразования для моделирования волновых процессов в кусочно-однородных средах</article-title><trans-title-group xml:lang="en"><trans-title>Generalized Laplace Transform Based on the Differentiation Operator With Piecewise Constant Coefficients</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нижников</surname><given-names>Александр Иванович</given-names></name><name name-style="western" xml:lang="en"><surname>Nizhnikov</surname><given-names>Alexander Ivanovich</given-names></name></name-alternatives><email xlink:type="simple">nizhnikov.ai@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яремко</surname><given-names>Олег Эммануилович</given-names></name><name name-style="western" xml:lang="en"><surname>Yaremko</surname><given-names>Oleg Emmanuilovich</given-names></name></name-alternatives><email xlink:type="simple">yaremki8@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яремко</surname><given-names>Наталья Николаевна</given-names></name><name name-style="western" xml:lang="en"><surname>Yaremko</surname><given-names>Natalya Nikolaevna</given-names></name></name-alternatives><email xlink:type="simple">yaremki@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский педагогический государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State Pedagogical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный технический университет&#13;
«Станкин»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State Technical University “Stankin”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Национальный исследовательский технологический уни-&#13;
верситет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Technological University “MISiS”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>25</day><month>01</month><year>2024</year></pub-date><volume>24</volume><issue>4</issue><fpage>239</fpage><lpage>251</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нижников А.И., Яремко О.Э., Яремко Н.Н., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Нижников А.И., Яремко О.Э., Яремко Н.Н.</copyright-holder><copyright-holder xml:lang="en">Nizhnikov A.I., Yaremko O.E., Yaremko N.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.chebsbornik.ru/jour/article/view/1603">https://www.chebsbornik.ru/jour/article/view/1603</self-uri><abstract><p>В статье развивается теория матричных интегральных преобразований Фурье на основе дифференциального оператора с кусочно-постоянными матричными коэффициентами.Дается определение матричного преобразования Фурье, изучаются его свойства и приложения к моделированию взаимосвязанных волновых процессов в кусочно однородных средах. Доказана формула обращения для матричного интегрального преобразования Фурье.Выявлены существенные отличия от скалярного случая. Развита техника применения матричного преобразования Фурье для решения взаимосвязанных смешанных краевых задач для систем дифференциальных уравнений гиперболического типа с матричными кусочно-постоянными коэффициентами. Найдено решение векторного аналога задачи о распространении волн в бесконечной струне с двумя участками различной плотности. Найден векторный аналог формулы Даламбера. Получено решение смешанной начально-краевой задачи для системы дифференциальных уравнений параболического типа, описывающей 𝑛− компонентную модель взаимосвязанного процесса тепломассопереноса в двухслойной среде.</p></abstract><trans-abstract xml:lang="en"><p>The paper develops the theory of matrix integral Fourier transforms based on a differential operator with piecewise constant matrix coefficients. The definition of the matrix Fourier transform is given, its properties and applications to the modeling of interrelated wave processes in piecewise homogeneous media are studied. An inversion formula for the matrix integral Fourier transform is proved. Significant differences from the scalar case are revealed. A technique for applying the matrix Fourier transform to solving interrelated mixed boundary value problems for systems of hyperbolic differential equations with matrix piecewise constant coefficients is developed. A solution is found for the vector analog of the problem of wave propagation inan infinite string with two regions of different density. A vector analogue of the d’Alembert formula is found. A solution is obtained for a mixed initial-boundary value problem for a system of differential equations of parabolic type, which describes an 𝑛 component model of an interconnected process of heat and mass transfer in a two-layer media.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Матричное интегральное преобразование Фурье</kwd><kwd>формула Даламбера</kwd><kwd>матричная экспонента</kwd><kwd>кусочно-однородная среда.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Matrix integral Fourier transform</kwd><kwd>d’Alembert formula</kwd><kwd>matrix exponential</kwd><kwd>piecewise homogeneous media</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Баврин И.И., Яремко О.Э. Операторный метод в теории интегральных преобразований для кусочно–однородных сред. Докл. РАН.–2001.– Т.379, № 3.–с.295–298.</mixed-citation><mixed-citation xml:lang="en">I. I. Bavrin, O. E. 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