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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Doklady Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Химия, науки о материалах</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-9535</issn><issn publication-format="electronic">3034-5111</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">682477</article-id><article-id pub-id-type="doi">10.31857/S2686953524060022</article-id><article-id pub-id-type="edn">BOYKJY</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CHEMICAL TECHNOLOGY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Fuzzy-Interval Model of Forest Biomass Changes under the Influence of Technogenic Chemical Pollutants under Conditions of Uncertainty</article-title><trans-title-group xml:lang="ru"><trans-title>Нечетко-интервальная модель процессов изменения лесной биомассы под воздействием техногенных химических загрязнений в условиях неопределенности</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Meshalkin</surname><given-names>V. P.</given-names></name><name xml:lang="ru"><surname>Мешалкин</surname><given-names>В. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Academician of the RAS</p></bio><bio xml:lang="ru"><p>Академик РАН</p></bio><email>butusov-1@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Butusov</surname><given-names>O. B.</given-names></name><name xml:lang="ru"><surname>Бутусов</surname><given-names>О. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>butusov-1@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kantyukov</surname><given-names>R. R.</given-names></name><name xml:lang="ru"><surname>Кантюков</surname><given-names>Р. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>butusov-1@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chistyakova</surname><given-names>T. B.</given-names></name><name xml:lang="ru"><surname>Чистякова</surname><given-names>Т. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>butusov-1@mail.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Dmitry Mendeleyev University of Chemical Technology of Russia</institution></aff><aff><institution xml:lang="ru">Российский химико-технологический университет имени Д.И. Менделеева</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт физической химии и электрохимии им. А.Н. Фрумкина РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">ООО “Gazprom VNIIGAZ”</institution></aff><aff><institution xml:lang="ru">ООО “Газпром ВНИИГАЗ”</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Saint Petersburg State Technological Institute (Technical University)</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский государственный технологический институт (технический университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-12-20" publication-format="electronic"><day>20</day><month>12</month><year>2024</year></pub-date><volume>519</volume><issue>1</issue><fpage>11</fpage><lpage>16</lpage><history><date date-type="received" iso-8601-date="2025-06-04"><day>04</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-9535/article/view/682477">https://journals.eco-vector.com/2686-9535/article/view/682477</self-uri><abstract xml:lang="en"><p>An original fuzzy-interval model of forest biomass change processes under the influence of technogenic chemical pollution under conditions of uncertainty of forest biomass state parameters is proposed. It is distinguished by the use of virtual positive and negative forest biomass flows with fuzzy values of forest biomass density and consumption parameters under the influence of chemical pollution, as well as operations of transforming initial differential equations with uncertain variables into interval equations with triangular fuzzy numbers (TFN), which allows, under conditions of fuzzy information about the biomass state, to calculate the boundaries of the impact and buffer zones of ecological zoning of forest areas under the influence of chemical pollution.</p></abstract><trans-abstract xml:lang="ru"><p>Предложена оригинальная нечетко-интервальная модель процессов изменения лесной биомассы под воздействием техногенных химических загрязнений в условиях неопределенности параметров состояния лесной биомассы, отличающаяся использованием виртуальных положительных и отрицательных потоков лесной биомассы с нечеткими значениями параметров плотности и расходов лесной биомассы под воздействием химических загрязнений, а также операций преобразования исходных дифференциальных уравнений с неопределенными переменными в интервальные уравнения с треугольными нечеткими числами. Данная модель позволяет в условиях нечеткой информации о состоянии биомассы рассчитывать границы импактной и буферной зон экологического районирования территории лесных массивов под воздействием химических загрязнений.</p></trans-abstract><kwd-group xml:lang="en"><kwd>chemical pollution</kwd><kwd>forest biomass</kwd><kwd>positive and negative biomass flows</kwd><kwd>triangular fuzzy numbers</kwd><kwd>fuzzy ordinary differential equations</kwd><kwd>ecological zoning of forests</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>химические загрязнения</kwd><kwd>биомасса лесных массивов</kwd><kwd>положительные и отрицательные виртуальные потоки биомассы</kwd><kwd>треугольные нечеткие числа</kwd><kwd>нечеткие обыкновенные дифференциальные уравнения</kwd><kwd>экологическое районирование лесных массивов</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>№21-79-30029</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Meshalkin V.P., Dovì V.G., Bobkov V.I. 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