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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">sustain</journal-id><journal-title-group><journal-title xml:lang="ru">Надежность</journal-title><trans-title-group xml:lang="en"><trans-title>Dependability</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-2646</issn><issn pub-type="epub">2500-3909</issn><publisher><publisher-name>RAMS Journal Limited liability company</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21683/1729-2646-2024-24-3-34-43</article-id><article-id custom-type="elpub" pub-id-type="custom">sustain-604</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 В ЗАДАЧАХ НАДЕЖНОСТИ И БЕЗОПАСНОСТИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SYSTEM ANALYSIS IN DEPENDABILITY AND SAFETY</subject></subj-group></article-categories><title-group><article-title>О функции надежности системы . Часть I. Аналитические результаты</article-title><trans-title-group xml:lang="en"><trans-title>On the dependability function of a  system. Part I. Analytical results</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>Рыков</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rykov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Рыков Владимир Васильевич – доктор физико-математических наук, профессор</p><p>проспект Ленинский, дом 65, корпус 1, Москва</p></bio><bio xml:lang="en"><p>Vladimir V. Rykov, Doctor of Physics and Mathematics, Professor</p><p>65, korp. 1 Leninsky prospekt, Moscow</p></bio><email xlink:type="simple">vladimir_rykov@mail.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>Иванова</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivanova</surname><given-names>N. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иванова Ника Михайловна – кандидат физико-математических наук, старший научный сотрудник</p><p>ул. Профсоюзная, д. 65, Москва</p></bio><bio xml:lang="en"><p>Nika M. Ivanova, Candidate of Physics and Mathematics, Senior Researcher</p><p>65 Profsoyuznaya st., Moscow</p></bio><email xlink:type="simple">nm_ivanova@bk.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российский государственный университет нефти и газа (национальный исследовательский университет) имени И.М. Губкина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Oil and Gas (Gubkin University)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт проблем управления им. В.А. Трапезникова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>V.A. Trapeznikov Institute of Control Sciences of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>14</day><month>09</month><year>2024</year></pub-date><volume>24</volume><issue>3</issue><fpage>34</fpage><lpage>43</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рыков В.В., Иванова Н.М., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Рыков В.В., Иванова Н.М.</copyright-holder><copyright-holder xml:lang="en">Rykov V.V., Ivanova N.M.</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.dependability.ru/jour/article/view/604">https://www.dependability.ru/jour/article/view/604</self-uri><abstract><p>Целью статьи является исследование основных характеристик надежности восстанавливаемых систем k-из-n с произвольными распределениями времени безотказной работы и ремонта их компонентов, а также общим числом ремонтных единиц. Система k-из-n представляет собой систему, состоящую из n компонентов, которая отказывает при отказе ее k (k≤n) компонентов. Для восстановления отказавших компонентов имеется l ремонтных устройств. Такая система обозначается как &lt;GIk≤n|GI|l&gt;. Для исследования привлекаются методы маркированных марковских процессов и теории порядковых статистик. С использованием предложенного подхода построена математическая модель системы, приведены преобразования меток и аналитические выражения для вычисления их распределений. В следующей части статьи на основе предлагаемого метода сформулирован алгоритм имитационного моделирования для оценки основных характеристик надежности. Он не только позволит провести численное исследование таких систем, но и послужит инструментом анализа чувствительности характеристик надежности к исходным параметрам системы.</p></abstract><trans-abstract xml:lang="en"><p>The paper aims to study the primary dependability characteristics of restorable k-out-of-n systems with arbitrary distributions of failure-free time and time to component repair, as well as the total number of repair units. A k-out-of-n system is a system consisting of n components that fails when k out of its (k≤n) components fail. l repair devices are available for restoring failed components. Such a system is denoted as &lt;GIk≤n|GI|l&gt;. The research employed marked Markov processes and the theory of order statistics. Using the proposed approach, a mathematical system model was constructed, marks transformations were mapped and analytic expressions for calculating their distributions were given. In the following part of the paper, using the proposed method, a simulation algorithm will be defined for the purpose of assessing the key dependability characteristics. It will not only enable a numerical study of such systems, but will also help analyse the sensitivity of the dependability characteristics to the initial system parameters.  </p></trans-abstract><kwd-group xml:lang="ru"><kwd>Маркированный марковский процесс</kwd><kwd>система</kwd><kwd>GI</kwd><kwd>l&gt;</kwd><kwd>произвольные распределения времени безотказной работы и восстановления</kwd><kwd>анализ чувствительности</kwd></kwd-group><kwd-group xml:lang="en"><kwd>marked Markov process</kwd><kwd>GI</kwd><kwd>l&gt; system</kwd><kwd>arbitrary distributions of fault-free operation and repair times</kwd><kwd>sensitivity analysis</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда № 22-49-02023 (получатель Иванова Н.М.).</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">Rykov V. 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