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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">dan-98</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>ВРАЩЕНИЯ ЯКОБИ В ОБРАТНОЙ ЗАДАЧЕ НАХОЖДЕНИЯ ПАРАМЕТРОВ ВИБРОННОЙ СВЯЗИ В УСЛОВИЯХ РЕЗОНАНСА</article-title><trans-title-group xml:lang="en"><trans-title>JACOBI ROTATIONS IN THE INVERSE TASK OF DETERMINATION OF VIBRONIC COUPLING PARAMETERS AT RESONANCE CONDITIONS</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>КУЗЬМИЦКИЙ</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>KUZMITSKY</surname><given-names>V. A.</given-names></name></name-alternatives><email xlink:type="simple">llum07@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Командно-инженерный институт МЧС Республики Беларусь, Минск</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>31</day><month>05</month><year>2016</year></pub-date><volume>59</volume><issue>3</issue><fpage>34</fpage><lpage>38</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; КУЗЬМИЦКИЙ В.А., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">КУЗЬМИЦКИЙ В.А.</copyright-holder><copyright-holder xml:lang="en">KUZMITSKY V.A.</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://doklady.belnauka.by/jour/article/view/98">https://doklady.belnauka.by/jour/article/view/98</self-uri><abstract><p>Найдено точное решение задачи определения из экспериментальных данных (энергий ek (obs) и интенсивностей переходов Ik (obs) наблюдаемого спектра поглощения, k = 1, 2, …, n) энергий невозмущенных состояний αi и матричных элементов вибронной связи bi, описывающих вибронный аналог сложного резонанса Ферми, n ≥ 3. В первой части алгоритма используются элементарные вращения Якоби для построения преобразования подобия X с требованием для элементов первой строки матрицы X (X1k)2 = Ik (obs), в соответствии с тем, что только одно невозмущенное состояние является «светлым». Во второй части для нахождения величин αi и bi решается алгебраическая проблема собственных значений матрицы Xdiag({ek (obs)})X –1.</p></abstract><trans-abstract xml:lang="en"><p>We have found an exact solution to the task of determination of the energies of the non-perturbed states ai and vibronic coupling matrix elements bi that describe the vibronic analogue of the complex Fermi resonance, using the experimental data represented by the energies ek (obs) and the transition intensities Ik (obs) (k = 1, 2, …, n) in an observed absorption spectrum. The algorithm consists of two stages. At the first stage, the Jacobi rotations are used to construct a similarity transformation X with the requirement (X1k)2 = Ik (obs) that corresponds to the condition that there is only one non-perturbed «bright» state. At the second stage, the algebraic eigenvalue problem for the matrix Xdiag({ek (obs)})X –1 is employed to find ai and bi values.</p></trans-abstract></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Wessel J., McClure D. S. // Mol. Cryst. Liq. Cryst. 1980. Vol. 58. P. 121–153.</mixed-citation><mixed-citation xml:lang="en">Wessel J., McClure D. S. // Mol. Cryst. Liq. Cryst. 1980. Vol. 58. P. 121–153.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Tan X., Salama F. // J. Chem. Phys. 2005. Vol. 123. P. 014312-1–014312-7.</mixed-citation><mixed-citation xml:lang="en">Tan X., Salama F. // J. Chem. 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