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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">donstu</journal-id><journal-title-group><journal-title xml:lang="en">Advanced Engineering Research (Rostov-on-Don)</journal-title><trans-title-group xml:lang="ru"><trans-title>Advanced Engineering Research (Rostov-on-Don)</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2687-1653</issn><publisher><publisher-name>Don State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">donstu-644</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="en"><subject>PHYSICAL AND MATHEMATICAL SCIENCES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКО-МАТЕМАТИЧЕСКИЕ НАУКИ</subject></subj-group></article-categories><title-group><article-title>ON CAUCHY PROBLEM FOR FIRST-ORDER PARTIAL DIFFERENTIAL EQUATION AND ITS APPLICATIONS IN INVERSION THEORY</article-title><trans-title-group xml:lang="ru"><trans-title>О задаче Коши для уравнения в частных производных первого порядка и её приложениях в теории обратных задач</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>Ватульян</surname><given-names>Александр Ованесович</given-names></name><name name-style="western" xml:lang="en"><surname>Vatulyan</surname><given-names>Alexander Ovanesovich</given-names></name></name-alternatives><email xlink:type="simple">vatulyan@math.rsu.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>Гукасян</surname><given-names>Лусинэ Суреновна</given-names></name><name name-style="western" xml:lang="en"><surname>Gukasyan</surname><given-names>Lusine Surenovna</given-names></name></name-alternatives><email xlink:type="simple">luska-90@list.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Донской государственный технический университет.</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Don State Technical University.</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Донской государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Don State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2012</year></pub-date><pub-date pub-type="epub"><day>30</day><month>12</month><year>2012</year></pub-date><volume>12</volume><issue>7</issue><fpage>11</fpage><lpage>20</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Vatulyan A.O., Gukasyan L.S., 2012</copyright-statement><copyright-year>2012</copyright-year><copyright-holder xml:lang="ru">Ватульян А.О., Гукасян Л.С.</copyright-holder><copyright-holder xml:lang="en">Vatulyan A.O., Gukasyan L.S.</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.vestnik-donstu.ru/jour/article/view/644">https://www.vestnik-donstu.ru/jour/article/view/644</self-uri><abstract><p>The inverse coefficient problem for the second-order operator in the simply connected domain with the piecewise-smooth boundary arising in the theory of the deformable system vibrations is investigated. The solution method for the inverse coefficient problem based on studying Cauchy problem for the first-order differential equation with variable coefficients is offered. Both direct and inverse problems are solved on the ground of the difference approximations method. The reconstruction of the variable shear modulus of various types, obtained at both accurate and noisy input data, is resulted.</p></abstract><trans-abstract xml:lang="ru"><p>Исследуется обратная коэффициентная задача для оператора второго порядка в односвязной области с кусочно-гладкой границей, возникающая в теории колебаний деформируемых систем. Предложен метод решения обратной коэффициентной задачи на основе исследования задачи Коши для дифференциального уравнения первого порядка с переменными коэффициентами. Решены прямая и обратная задачи на основе метода разностных аппроксимаций. Приведены результаты реконструкции переменного модуля сдвига различных типов, полученные как при точных, так и при зашумленных входных данных.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>задача Коши</kwd><kwd>обратная коэффициентная задача</kwd><kwd>разностные схемы.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Cauchy problem</kwd><kwd>inverse coefficient problem</kwd><kwd>difference schemes.</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">Ватульян, А. О. Обратные задачи в механике деформируемого твёрдого тела / А. О. Ватульян. — Москва: Физматлит, 2007. — 223 с.</mixed-citation><mixed-citation xml:lang="en">Vatulyan, A.O. Obratnyye zadachi v mekhanike deformiruyemogo tverdogo tela. [Inverse problems in deformable solid mechanics.] Moscow: Fizmatlit, 2007, 223 p. 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