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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">intechngu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НГУ. Серия: Информационные технологии</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik NSU. Series: Information Technologies</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1818-7900</issn><issn pub-type="epub">2410-0420</issn><publisher><publisher-name>НГУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25205/1818-7900-2025-23-4-5-22</article-id><article-id custom-type="elpub" pub-id-type="custom">intechngu-336</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></article-categories><title-group><article-title>Численное решение коэффициентной обратной задачи электроимпедансной томографии с использованием лабораторных измерений</article-title><trans-title-group xml:lang="en"><trans-title>Numerical solution of the coefficient inverse problem of electrical impedance tomography using laboratory measurements</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>Афанасьева</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Afanaseva</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Афанасьева Анна Александровна, аспирант кафедры вычислительной математики и компьютерного моделирования</p><p>Томск</p></bio><bio xml:lang="en"><p>Anna A. Afanaseva, Graduate Student of Department of Computational Mathematics and Computer Modelling of National Research</p><p>Tomsk</p></bio><email xlink:type="simple">anna.afanaseva@stud.tsu.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>Старченко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Starchenko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Старченко Александр Васильевич, профессор, доктор физико-математических наук, заведующий кафедрой вычислительной математики и компьютерного моделирования, научный сотрудник Регионального научно-образовательного математического центра</p><p>Researcher ID B-2354-2014</p><p>Томск</p></bio><bio xml:lang="en"><p>Alexander V. Starchenko, Professor, Doctor of Physical and Mathematical Sciences, Head of Department of Computational Mathematics and Computer Modelling of National Research, Scientific Researcher, Regional Scientific Educational Mathematical Center</p><p>Researcher ID B-2354-2014</p><p>Tomsk</p></bio><email xlink:type="simple">starch@math.tsu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Томский государственный университет<country>Россия</country></aff><aff xml:lang="en">Tomsk State University<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>12</day><month>02</month><year>2026</year></pub-date><volume>23</volume><issue>4</issue><fpage>5</fpage><lpage>22</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Афанасьева А.А., Старченко А.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Афанасьева А.А., Старченко А.В.</copyright-holder><copyright-holder xml:lang="en">Afanaseva A.A., Starchenko A.V.</copyright-holder><license 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://intechngu.elpub.ru/jour/article/view/336">https://intechngu.elpub.ru/jour/article/view/336</self-uri><abstract><p>Представлен итерационный численный метод решения обратной коэффициентной задачи для однородного эл­липтического уравнения с интегро-дифференциальными граничными условиями в замкнутой области. Метод опирается на конечно-объемные аппроксимации дифференциальных и интегральных операторов на неструкту­рированных сетках, численное решение последовательности прямых задач при известном кусочно-постоянном распределении коэффициентов разностного эллиптического уравнения и сходящийся итеративно регуляризо­ванный метод Гаусса – Ньютона. Разработанный метод решения обратных задач электроимпедансной томо­графии прошел тестирование на измерениях электрического напряжения, выполненных на экспериментальном стенде KIT в университете Восточной Финляндии. Получены близкие к реальным результатам реконструкции электрической проводимости внутри области исследования.</p></abstract><trans-abstract xml:lang="en"><p>An iterative numerical method for solving the inverse coefficient problem for a uniform elliptic equation with integro-differential boundary conditions in a closed domain is presented. The method relies on finite-volume approxima­tions of differential and integral operators on unstructured grids, numerical solution of a sequence of direct problems with a known piecewise constant distribution of coefficients of a difference elliptic equation, and the convergent iteratively regularizable Gauss-Newton method. The developed method for solving inverse problems of electrical imped­ance tomography has been tested on electrical voltage measurements performed at the KIT experimental stand at the University of Eastern Finland. The results of reconstruction of electrical conductivity within the research area are close to the real ones.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>коэффициентная обратная задача</kwd><kwd>уравнение эллиптического типа с кусочно-постоянными коэффициентами</kwd><kwd>интегро-дифференциальное граничное условие</kwd><kwd>метод конечного объема</kwd><kwd>неструктурированные сетки</kwd><kwd>полная электродная модель</kwd><kwd>реконструкция проводимости</kwd><kwd>итеративно регуляризованный метод Гаусса – Ньютона</kwd></kwd-group><kwd-group xml:lang="en"><kwd>coefficient inverse problem</kwd><kwd>elliptic equation with piecewise constant coefficients</kwd><kwd>integro-differential boundary condition</kwd><kwd>finite volume method</kwd><kwd>unstructured grids</kwd><kwd>complete electrode model</kwd><kwd>conduction reconstruction</kwd><kwd>iteratively regularized Gauss-Newton method</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Исследование выполнено при финансовой поддержке Министерства науки и высшего образования РФ (проект развития региональных математических центров).</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>The work was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation (Project for the development of regional mathematical centers).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Barber D. 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