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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">sudexpert</journal-id><journal-title-group><journal-title xml:lang="ru">Теория и практика судебной экспертизы</journal-title><trans-title-group xml:lang="en"><trans-title>Theory and Practice of Forensic Science</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1819-2785</issn><issn pub-type="epub">2587-7275</issn><publisher><publisher-name>The Russian Federal Centre of Forensic Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30764/1819-2785-2022-1-50-57</article-id><article-id custom-type="elpub" pub-id-type="custom">sudexpert-710</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>МЕТОДЫ И СРЕДСТВА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METHODS AND TOOLS</subject></subj-group></article-categories><title-group><article-title>Установление породы древесины по спектрам диффузного отражения в ближней инфракрасной области с применением линейного дискриминантного анализа</article-title><trans-title-group xml:lang="en"><trans-title>Identifying Timber Species by Diffuse Reflection Spectra in the Near-Infrared Region Using a Linear Discriminant Analysis</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>Хох</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Khokh</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хох Анна Николаевна – заведующий лабораторией исследования материалов, веществ и изделий</p><p>Минск 220114</p></bio><bio xml:lang="en"><p>Khokh Anna Nikolaevna – Head of Laboratory of Materials, Substances and Products Research</p><p>Minsk 220114</p></bio><email xlink:type="simple">1ann1hoh@gmail.com</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>Звягинцев</surname><given-names>В. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Zvyagintsev</surname><given-names>V. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Звягинцев Вячеслав Борисович – к. б. н., доцент, заведующий кафедрой лесозащиты и древесиноведения</p><p>Минск 220006</p></bio><bio xml:lang="en"><p>Zvyagintsev Vyacheslav Borisovich – Candidate of Biology, Assistant Professor, Head of Department of Forest Protection and Wood Science</p><p> </p><p>Minsk 220006</p></bio><email xlink:type="simple">mycolog@tut.by</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Государственное учреждение «Научно-практический центр Государственного комитета судебных экспертиз Республики Беларусь»</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>State Institution “Scientific and Practical Center of the State Forensic Examination Committee of the Republic of Belarus”</institution><country>Belarus</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Учреждение образования «Белорусский государственный технологический университет»</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Educational Institution “Belarusian State Technological University”</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>29</day><month>04</month><year>2022</year></pub-date><volume>17</volume><issue>1</issue><fpage>50</fpage><lpage>57</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хох А.Н., Звягинцев В.Б., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Хох А.Н., Звягинцев В.Б.</copyright-holder><copyright-holder xml:lang="en">Khokh A.N., Zvyagintsev V.B.</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.tipse.ru/jour/article/view/710">https://www.tipse.ru/jour/article/view/710</self-uri><abstract><p>Представлен алгоритм исследования древесных материалов хвойных пород (Pinus sylvestris L., Pinus sibirica Du Tour, Larix decidua Mill., Abies alba L. и Picea abies (L.) Karst.) методом спектроскопии в ближней инфракрасной области. Древесина представляет собой сложный органический материал, состоящий из целлюлозы, гемицеллюлозы, лигнина и экстрактивных веществ. Данные соединения генерируют полосы поглощения в ближней инфракрасной области, в основном представляющие собой обертоны и полосы комбинации функциональных групп O-H, N-H и C-H. Определены оптимальные способы коррекции рассеяния с учетом специфики исследуемых образцов. На основе применения линейного дискриминантного анализа предложена методика по автоматическому установлению видовой принадлежности древесины по спектрам диффузного отражения в ближней инфракрасной области, а также определены ключевые параметры, достаточные для проведения процедуры классификации. Полученные LDA-модели показали высокую предсказательную способность, общая средняя точность классификации достигала 97,6 %. Следует констатировать, что метод спектроскопии в ближней инфракрасной области подходит для решения задач, связанных с установлением видовой принадлежности древесины, является эффективным инструментом для разделения древесных пород.</p></abstract><trans-abstract xml:lang="en"><p>The article presents an algorithm of analysis of coniferous timber materials (Pinus sylvestris L., Pinus sibirica Du Tour, Larix decidua Mill., Abies alba L. and Picea abies (L.) Karst.) using the spectroscopy method in the near-infrared region. Timber is a complex organic material consisting of cellulose, hemicellulose, lignin, and extractive substances. These compounds generate absorption bands in the near-infrared region which are mainly overtones and combination bands of the O-H, N-H and C-H functional groups. The authors suggest the best ways to correct scattering considering the specific features of the samples under examination. Based on the application of linear discriminant analysis, a method is proposed for the automatic identification of the timber species by diffuse reflection spectra in the near-infrared region, as well as key parameters sufficient for the classification procedure are determined. The obtained LDA-models showed high predictive capability. The overall average classification accuracy reached 97,6%. Based on the results obtained, it can be stated that the NIR spectroscopy is suitable for solving tasks related to the identification of the timber species; it has proven to be an effective tool for distinguishing wood species. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>древесина</kwd><kwd>БИК-спектроскопия</kwd><kwd>видовая принадлежность</kwd><kwd>метод главных компонент</kwd><kwd>дискриминантный анализ</kwd><kwd>хемометрические алгоритмы</kwd><kwd>судебная экспертиза</kwd></kwd-group><kwd-group xml:lang="en"><kwd>timber</kwd><kwd>NIR spectroscopy</kwd><kwd>species identification</kwd><kwd>principal component analysis</kwd><kwd>discriminant  analysis</kwd><kwd>chemometric algorithms</kwd><kwd>forensic examination</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Toscano P., Iannotta N., Scalercio S. 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