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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">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2026-62-2-143-148</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-904</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>ИНФОРМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INFORMATICS</subject></subj-group></article-categories><title-group><article-title>Приближенные алгоритмы построения оценок максимального правдоподобия параметров трапециевидного распределения</article-title><trans-title-group xml:lang="en"><trans-title>Approximation algorithms for the maximum likelihood estimation of the parameters of the trapezoidal distribution</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5209-0149</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баркетов</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Barketau</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баркетов Максим Сергеевич – кандидат физико-математических наук, доцент, старший научный сотрудник</p><p>ул. Сурганова, 6, 220012, Минск</p></bio><bio xml:lang="en"><p>Maksim S. Barketau – Ph. D. (Physics and Mathematics), Associate Professor, Senior Researcher</p><p>6, Surganov Str., 220012, Minsk</p></bio><email xlink:type="simple">barketau@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Объединенный институт проблем информатики Национальной академии наук Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>United Institute of Informatics Problems of the National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>10</day><month>07</month><year>2026</year></pub-date><volume>62</volume><issue>2</issue><fpage>143</fpage><lpage>148</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Баркетов М.С., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Баркетов М.С.</copyright-holder><copyright-holder xml:lang="en">Barketau M.S.</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://vestifm.belnauka.by/jour/article/view/904">https://vestifm.belnauka.by/jour/article/view/904</self-uri><abstract><p>Рассмотрена задача оценивания параметров трапециевидного распределения. Построен доверительный интервал, в котором находятся возможные значения случайной величины с трапециевидным распределением. Разработаны два приближенных алгоритма построения оценок максимального правдоподобия, основанные на ограниченном переборе возможных значений параметров. Трапециевидное распределение может быть использовано в задачах моделирования вместо нормального распределения, когда есть нижние и верхние границы на значение случайной величины.</p></abstract><trans-abstract xml:lang="en"><p>We considered the problem of estimation of the parameters of the trapezoidal distribution. We built a confidence interval. This confidence interval with high probability contains the value of the random variable with a trapezoidal distribution. We further developed two approximation algorithms for the problem that are based on the maximum likelihood principle. Algorithm uses the enumeration principle of the values of the parameters. The trapezoidal distribution may be used instead of normal distribution when there are upper and lower bounds on the value of the random variable.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>трапециевидное распределение</kwd><kwd>метод максимального правдоподобия</kwd><kwd>математическая статистика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>trapezoidal distribution</kwd><kwd>method of maximum likelihood</kwd><kwd>mathematical statistics</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при частичной поддержке Белорусского республиканского фонда фундаментальных исследований (проект № Ф26КИ-009)</funding-statement><funding-statement xml:lang="en">The research is partially supported by the Belarusian Republican Foundation for Fundamental Research (project no. Ф26КИ-009).</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">Kacker, R. N. Trapezoidal and triangular distributions for Type B evaluation of standard uncertainty / R. N. Kacker, J. F. Lawrence // Metrologia. – 2007. – Vol. 44, № 2. – P. 117–127. https://doi.org/10.1088/0026-1394/44/2/003</mixed-citation><mixed-citation xml:lang="en">Kacker R. N., Lawrence J. F. Trapezoidal and triangular distributions for Type B evaluation of standard uncertainty. Metrologia, 2007, vol. 44, no. 2, pp. 117–127. https://doi.org/10.1088/0026-1394/44/2/003</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Dorp van, J. R. Generalized trapezoidal distributions / J. R. van Dorp, S. 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