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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">phmath</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Государственного университета просвещения. Серия: Физика-Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Federal State University of Education. Series: Physics and Mathematics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-5083</issn><issn pub-type="epub">2949-5067</issn><publisher><publisher-name>Federal State University of Education</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">phmath-226</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>ИССЛЕДОВАНИЕ СТРУКТУРЫ УЕДИНЕННЫХ ВНУТРЕННИХ ВОЛН
БОЛЬШОЙ АМПЛИТУДЫ В ТРЕХСЛОЙНОЙ ЖИДКОСТИ</article-title><trans-title-group xml:lang="en"><trans-title>INVESTIGATION OF THE STRUCTURE OF LARGE AMPLITUDE
INTERNAL SOLITARY WAVES IN A THREE-LAYER FLUID</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>Рувинская</surname><given-names>Е. А.</given-names></name></name-alternatives><email xlink:type="simple">e.vladykina@gmail.com</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>Куркина</surname><given-names>О. Е.</given-names></name></name-alternatives><email xlink:type="simple">pol-oukhin@mail.ru</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>Куркин</surname><given-names>А. А.</given-names></name></name-alternatives><email xlink:type="simple">aakurkin@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Нижегородский государственный технический университет им. Р.Е. Алексеева</institution><country>Russian Federation</country></aff><aff xml:lang="ru" id="aff-2"><institution>Нижегородский государственный технический университет им. Р.Е. Алексеева; Национальный исследовательский университет "Высшая школа экономики"</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2011</year></pub-date><pub-date pub-type="epub"><day>08</day><month>01</month><year>2023</year></pub-date><volume>0</volume><issue>2</issue><fpage>61</fpage><lpage>74</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рувинская Е.А., Куркина О.Е., Куркин А.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Рувинская Е.А., Куркина О.Е., Куркин А.А.</copyright-holder><copyright-holder xml:lang="en">Рувинская Е.А., Куркина О.Е., Куркин А.А.</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.physmathmgou.ru/jour/article/view/226">https://www.physmathmgou.ru/jour/article/view/226</self-uri><abstract><p>Исследована структура физических полей (избыточной плотности, горизонтальной и вертикальной скорости) локализованных стационарных полнонелинейных возмущений в трехслойной симметричной жидкости. Проанализированы соотношения «ширина-амплитуда», «скорость-амплитуда» для таких волн и их зависимость от вертикальной координаты. Проводится сопоставление со слабонелинейной теорией.</p></abstract><trans-abstract xml:lang="en"><p>The structure of physical fields (density anomaly, horizontal and vertical velocity)
of localized stationary full-nonlinear disturbances in the symmetric three-layer fluid
is examined. Wavelength-amplitude and phase speed-amplitude relationship depending
on vertical coordinate are analyzed for these waves. The comparison with weaklynonlinear
theory is also carried out.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Солитон</kwd><kwd>вертикальная мода</kwd><kwd>нелинейность</kwd><kwd>модифицированное уравнение Кортевега - де Вриза</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Soliton</kwd><kwd>vertical mode</kwd><kwd>nonlinearity</kwd><kwd>the modified Korteweg - de Vries equation</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">Краусс, В. Внутренние волны. Л.: Гидрометеоиздат, 1968. 272 c.</mixed-citation><mixed-citation xml:lang="en">Краусс, В. Внутренние волны. Л.: Гидрометеоиздат, 1968. 272 c.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Морозов, Е.Г. Океанские внутренние волны. М.: Наука, 1985. 151 с.</mixed-citation><mixed-citation xml:lang="en">Морозов, Е.Г. Океанские внутренние волны. 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