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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">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-1097</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Метод классификации угля и пустой породы с использованием терагерцовой спектроскопии во временной области и комбинации кластерного анализа и анализа главных компонент</article-title><trans-title-group xml:lang="en"><trans-title>Classification Method of Coal and Gangue Using Terahertz Time-Domain Spectroscopy, Cluster Analysis and Principal Component 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>Shao</surname><given-names>D.</given-names></name><name name-style="western" xml:lang="en"><surname>Shao</surname><given-names>D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хуайбэй</p></bio><bio xml:lang="en"><p>Huaibei</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Miao</surname><given-names>Sh.</given-names></name><name name-style="western" xml:lang="en"><surname>Miao</surname><given-names>Sh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хуайбэй</p></bio><bio xml:lang="en"><p>Huaibei</p></bio><email xlink:type="simple">msgmcu@126.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>Fan</surname><given-names>Q.</given-names></name><name name-style="western" xml:lang="en"><surname>Fan</surname><given-names>Q.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хуайбэй</p></bio><bio xml:lang="en"><p>Huaibei</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Wang</surname><given-names>X.</given-names></name><name name-style="western" xml:lang="en"><surname>Wang</surname><given-names>X.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хуайбэй</p></bio><bio xml:lang="en"><p>Huaibei</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Liu</surname><given-names>Zh.</given-names></name><name name-style="western" xml:lang="en"><surname>Liu</surname><given-names>Zh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сюйчжоу</p><p>Сюйчжоу, Цзянсу</p></bio><bio xml:lang="en"><p>Xuzhou</p><p>Xuzhou, Jiangsu</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ding</surname><given-names>Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Ding</surname><given-names>E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сюйчжоу</p><p>Сюйчжоу, Цзянсу</p></bio><bio xml:lang="en"><p>Xuzhou</p><p>Xuzhou, Jiangsu</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Школа физики и электронной информации Хуайбэйского педагогического университета</institution></aff><aff xml:lang="en"><institution>School of Physics and Electronic Information at Huaibei Normal University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Школа информатики и управления Китайского горно-технологического университета; IOT Исследовательский центр Perception Mine Китайского горно-технологического университета</institution></aff><aff xml:lang="en"><institution>School of Information and Control Engineering at China University of Mining and Technology; IOT Perception Mine Research Center, China University of Mining and Technology</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>28</day><month>07</month><year>2022</year></pub-date><volume>89</volume><issue>4</issue><fpage>555</fpage><lpage>561</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Shao D., Miao S., Fan Q., Wang X., Liu Z., Ding Е., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Shao D., Miao S., Fan Q., Wang X., Liu Z., Ding Е.</copyright-holder><copyright-holder xml:lang="en">Shao D., Miao S., Fan Q., Wang X., Liu Z., Ding E.</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/1097">https://zhps.ejournal.by/jour/article/view/1097</self-uri><abstract><p>Терагерцовая спектроскопия во временной области объединена с многомерным статистическим анализом для выявления различных видов угля и пустой породы. Измерены терагерцовый спектр и спектр мощности образца, показатель преломления и коэффициент поглощения образца рассчитаны по терагерцовому спектру образца во временной области. Обнаружены значительные различия в спектре мощности, показателе преломления и коэффициенте поглощения для разных видов угля и пустой породы. После объединения многомерных статистических методов – кластерного анализа (CA) и анализа главных компонент (PCA) – создана модель, основанная на параметрах ТГц, и исследованы различные типы угля и пустой породы. При кластерном анализе евклидово расстояние между образцами двух типов и оценка первой главной компоненты при анализе главных компонент отражают сходство и различие между образцами угля и породы. Результаты, полученные этими методами, согласуются между собой. Показано, что сочетание терагерцовой технологии  и многомерных статистических методов дает точный подход к различению угля и пустой породы.</p></abstract><trans-abstract xml:lang="en"><p>The process of coal mining generates high amounts of coal gangue. Accordingly, coal-gangue separation is a key problem limiting coal production and quality. Terahertz time-domain spectroscopy was combined with multivariate statistical analyses to identify different kinds of coal and gangue. First, the terahertz spectrum and power spectrum of the sample were measured, and the refractive index and absorption coefficient of the sample were calculated from the terahertz time-domain spectrum of the sample. Significant differences in the power spectrum, refractive index, and absorption coefficient were found between different kinds of coal and gangue. After combining multivariate statistical methods – cluster analysis (CA) and principal component analysis (PCA) – a model based on THz parameters and different types of coal and gangue was established. During cluster analysis, the Euclidean distance of two types of samples and the score of the first principal component in the principal component analysis could reflect the similarity and dissimilarity between coal and gangue samples, and consistent results were obtained for CA and PCA. The experimental results showed that the combination of terahertz technology and multivariate statistical methods yielded an accurate approach to distinguishing between coal and gangue.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>терагерцовая спектроскопия во временной области</kwd><kwd>классификация угольных пород</kwd><kwd>анализ главных компонент</kwd><kwd>кластерный анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>terahertz time-domain spectroscopy</kwd><kwd>coal-gangue classification</kwd><kwd>principal component analysis</kwd><kwd>cluster analysis</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by financially by The National Natural Science Foundation of China (Grant No. 52074273), the Key Natural Science Research Project for Colleges and Universities of Anhui Province (Grant No. KJ2020A0027), and the Natural Science Foundation of Anhui Province  (Grant No. 2008085MF211).</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">H. 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