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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">sapi</journal-id><journal-title-group><journal-title xml:lang="ru">Системный анализ и прикладная информатика</journal-title><trans-title-group xml:lang="en"><trans-title>«System analysis and applied information science»</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2309-4923</issn><issn pub-type="epub">2414-0481</issn><publisher><publisher-name>Belarusian National Technical University</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">sapi-62</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>Системный анализ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>System analysis</subject></subj-group></article-categories><title-group><article-title>ГРАНИЧНЫЙ КРИЗИС АТТРАКТОРА В МОДЕЛИРОВАНИИ ПРИЧИН ДЕГРАДАЦИИ ПРОМЫСЛОВЫХ БИОРЕСУРСОВ</article-title><trans-title-group xml:lang="en"><trans-title>BOUNDARY CRISIS OF ATTRACTOR IN THE SIMULATION CAUSES OF THE DEGRADATION OF COMMERCIAL BIORESOURCES</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>Переварюха</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Perevarukha</surname><given-names>A. Yu.</given-names></name></name-alternatives><email xlink:type="simple">CA_PI@bntu.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский институт информатики и автоматизации РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg Institute for Informatics and Automation of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>27</day><month>11</month><year>2015</year></pub-date><volume>0</volume><issue>3</issue><fpage>4</fpage><lpage>8</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Переварюха А.Ю., 2015</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="ru">Переварюха А.Ю.</copyright-holder><copyright-holder xml:lang="en">Perevarukha A.Y.</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://sapi.bntu.by/jour/article/view/62">https://sapi.bntu.by/jour/article/view/62</self-uri><abstract><p>Рассмотрена вычислительная модель, соединяющая формализацию экологических особенностей репродуктивного цикла мигрирующих рыб и возможности исследования нелинейных эффектов в динамике популяций, подвергающихся антропогенному воздействию. Реализованная событийная компонента в непрерывном времени позволила учитывать изменения выживаемости поколения во взаимосвязи с факторами скорости роста. Дискретная составляющая траектории имеет две области притяжения и характеризуется обратной касательной бифуркации из-за воздействия промысла, что резко переводит популяцию с состояние нерегулярных флуктуаций при низкой численности. Дальнейшее возникновение граничного кризиса интервального аттрактора описывает распространенный сценарий необратимой деградации биоресурсов.</p></abstract><trans-abstract xml:lang="en"><p>The article describes the computational model that unites the formalization of ecological features of the reproductive cycle of anadromous fish and the possibility of studying nonlinear effects in the population dynamics under anthropogenic impact. Event-driven component implemented in continuous time has allowed us to take into account changes in the survival generation in interrelation with the factors of growth rate. Discrete component trajectory of the dynamical system has two areas of attraction and is characterized by the reverse tangent bifurcation due to the impact of fishing, which dramatically transforms the population with the condition of irregular fluctuations in low numbers. The further emergence of «boundary crisis» for the interval attractor describes a common scenario an irreversible degradation of biological resources.</p></trans-abstract><funding-group><funding-statement xml:lang="ru">РФФИ</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">Feigenbaum M. J. Universal behavior in nonlinear systems / M. J. Feigenbaum // Physica D.– 1983.– Vol. 7, № 1–3.– P. 16–39.</mixed-citation><mixed-citation xml:lang="en">Feigenbaum M. J. Universal behavior in nonlinear systems / M. J. 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