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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1669</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>СПЕКТРОСКОПИЯ В ЭКОЛОГИЧЕСКИХ ИССЛЕДОВАНИЯХ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SPECTROSCOPY IN ECOLOGICAL STUDIES</subject></subj-group></article-categories><title-group><article-title>Качественный и количественный многопараметрический анализ спектров поглощения отходов пластмасс</article-title><trans-title-group xml:lang="en"><trans-title>Qualitative and Quantitative Multivariate Analysis of Optical Density Spectra of Plastic Waste</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>Куликовская</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulikovskaya</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">p.kulikovskaya@ifanbel.bas-net.by</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>Ходасевич</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khodasevich</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики НАН Беларуси</institution></aff><aff xml:lang="en"><institution>B. I. Stepanov Institute of Physics of the National Academy&#13;
of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>22</day><month>10</month><year>2024</year></pub-date><volume>91</volume><issue>5</issue><fpage>714</fpage><lpage>722</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Куликовская П.А., Ходасевич М.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Куликовская П.А., Ходасевич М.А.</copyright-holder><copyright-holder xml:lang="en">Kulikovskaya P.A., Khodasevich M.A.</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://zhps.ejournal.by/jour/article/view/1669">https://zhps.ejournal.by/jour/article/view/1669</self-uri><abstract><p>   По ИК-спектрам поглощения осуществлена классификация пяти типов пластмасс с точностью &gt; 0.96 с помощью методов многопараметрического кластерного анализа в пространстве главных компонент спектральных переменных, ранжированных по среднему отклонению оптической плотности от центрированной величины. Изменения спектров образцов поликарбоната в видимом и ИК-диапазонах, вызванные термически ускоренной деградацией, исследованы с помощью метода частичных наименьших квадратов с выбором спектральных переменных методом поиска комбинации движущихся окон оптимальной ширины. Получена количественная калибровка срока старения до 11.5 лет со среднеквадратичным отклонением оценки около 19 дней и остаточным отклонением &gt; 45.</p></abstract><trans-abstract xml:lang="en"><p>   5 types of plastics were classified based on NIR spectra of optical density using multivariate cluster analysis in principal component space. Accuracy above 0.96 is obtained by ranking spectral variables by decreasing variance of measured optical density. Changes in polycarbonate VIS-NIR spectra during thermal degradation were modeled using partial least squares method with searching combination moving windows of optimal width. A quantitative calibration of the aging term up to 11.5 years was obtained with a root mean square error of the estimate around 19 days and a residual predictive deviation of more than 45.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>спектр поглощения</kwd><kwd>метод главных компонент</kwd><kwd>выбор спектральных переменных</kwd><kwd>метод k-ближайших соседей</kwd><kwd>иерархический кластерный анализ</kwd><kwd>метод частичных наименьших квадратов</kwd><kwd>пластмасса</kwd></kwd-group><kwd-group xml:lang="en"><kwd>absorption spectrum</kwd><kwd>principal component analysis</kwd><kwd>spectral variables selection</kwd><kwd>k nearest neighbors</kwd><kwd>hierarchical cluster analysis</kwd><kwd>partial least squares</kwd><kwd>polymers</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Белорусского республиканского фонда фундаментальных исследований (грант № Ф22-031)</funding-statement><funding-statement xml:lang="en">The work was carried out with the financial support of the Belarusian Republican Foundation for Basic Research (grant no. 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