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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-1802</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>ЛАЗЕРНАЯ СПЕКТРОСКОПИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>LASER SPECTROSCOPY</subject></subj-group></article-categories><title-group><article-title>Сравнение спектров “ядра” и “хвоста” факела лазерной плазмы для анализа состава низколегированной стали с использованием регрессии на латентные структуры</article-title><trans-title-group xml:lang="en"><trans-title>Comparison of the “Core” and the “Tail” Spectra of a Laser Plasma Plume for theAnalysis of Low-Alloy Steel Composition Using Partial Least Squares Regression</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>Кирис</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kiris</surname><given-names>V. V.</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">v.kiris@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>Кацалап</surname><given-names>К. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Catsalap</surname><given-names>K. Yu.</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 contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бельков</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Belkov</surname><given-names>M. V.</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 of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>27</day><month>03</month><year>2025</year></pub-date><volume>92</volume><issue>2</issue><fpage>161</fpage><lpage>169</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кирис В.В., Кацалап К.Ю., Бельков М.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кирис В.В., Кацалап К.Ю., Бельков М.В.</copyright-holder><copyright-holder xml:lang="en">Kiris V.V., Catsalap K.Y., Belkov M.V.</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/1802">https://zhps.ejournal.by/jour/article/view/1802</self-uri><abstract><p>Проведено сравнение результатов анализа низколегированных сталей с использованием классической калибровки и регрессии на латентные структуры при регистрации спектров из “ядра” и “хвоста” факела лазерной плазмы. Возбуждение плазмы осуществлено лазером на эрбиевом стекле с пассивным затвором. Спектры зарегистрированы с помощью компактного спектрометра низкого (0.5 нм) разрешения. Для улучшения качества спектров использована предварительная обработка, связанная с выравниванием длин волн и интенсивностей контрольных участков спектрасра.</p></abstract><trans-abstract xml:lang="en"><p>The paper compares the results of low-alloy steel analysis using classical calibration and partial least squares regression when recording spectra from the “core” and the “tail” of a laser plasma plume. Plasma excitation was performed using an erbium glass laser with a passive shutter. The spectra were recorded using a compact low-resolution (0.5 nm) spectrometer. To improve the quality of the spectra, preliminary processing was used, associated with the alignment of wavelengths and intensities of control sections of the spectrum.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лазерно-искровая эмиссионная спектроскопия</kwd><kwd>сталь</kwd><kwd>регрессия на латентные структуры</kwd><kwd>лазер на эрбиевом стекле</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser-induced breakdown spectroscopy</kwd><kwd>steel</kwd><kwd>partial least square regression</kwd><kwd>erbium glass laser</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственной программы научных исследований Республики Беларусь “Фотоника и электроника для инноваций”, задание 1.5.</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">V. Palleschi, B. Ramakrishna. 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