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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-654</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>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>УДАЛЕНИЕ ШУМА НА ОСНОВЕ ВЕЙВЛЕТ-МЕТОДА ИЗ СПЕКТРА КОМБИНАЦИОННОГО РАССЕЯНИЯ ДЛЯ ИССЛЕДОВАНИЯ ТОНКОЙ ПЛЕНКИ ФОРСТЕРИТ-ГИДРОКСИАПАТИТА, ПОЛУЧЕННОЙ ИМПУЛЬСНЫМ ЛАЗЕРНЫМ ОСАЖДЕНИЕМ НА ПОДЛОЖКЕ ИЗ НЕРЖАВЕЮЩЕЙ СТАЛИ 316L</article-title><trans-title-group xml:lang="en"><trans-title>WAVELET-BASED NOISE REMOVAL FROM RAMAN SIGNAL TO STUDY PLD COATED FORSTERITE-HYDROXYAPATITE THIN FILM ON STAINLESS STEEL 316L SUBSTRATE</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>Prakash</surname><given-names>P. S.</given-names></name><name name-style="western" xml:lang="en"><surname>Prakash</surname><given-names>P. S.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">pspsbme@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>Sharan</surname><given-names>T. S.</given-names></name><name name-style="western" xml:lang="en"><surname>Sharan</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">tareshss.rs.bme16@itbhu.ac.in</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Pawar</surname><given-names>S. J.</given-names></name><name name-style="western" xml:lang="en"><surname>Pawar</surname><given-names>S. J.</given-names></name></name-alternatives><bio xml:lang="ru"><p>211004, Уттар-Прадеш</p></bio><bio xml:lang="en"/><email xlink:type="simple">sjpawar@mnnit.ac.in</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>Tewari</surname><given-names>R. P.</given-names></name><name name-style="western" xml:lang="en"><surname>Tewari</surname><given-names>R. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>211004, Уттар-Прадеш</p></bio><bio xml:lang="en"/><email xlink:type="simple">rptewari@mnnit.ac.in</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>Sharma</surname><given-names>S.</given-names></name><name name-style="western" xml:lang="en"><surname>Sharma</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">shiru.bme@iitbhu.ac.in</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный институт технологий Motilal Nehru, Аллахабад</institution></aff><aff xml:lang="en"><institution>Department of Applied Mechanics, Motilal Nehru National Institute of Technology Allahabad</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Школа биомедицинской инженерии, Индийский технологический институт (BHU)</institution></aff><aff xml:lang="en"><institution>School of Biomedical Engineering, Indian Institute of Technology (BHU)</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2020</year></pub-date><volume>87</volume><issue>3</issue><elocation-id>507(1)-507(8)</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Prakash P.S., Sharan T.S., Pawar S.J., Tewari R.P., Sharma S., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Prakash P.S., Sharan T.S., Pawar S.J., Tewari R.P., Sharma S.</copyright-holder><copyright-holder xml:lang="en">Prakash P.S., Sharan T.S., Pawar S.J., Tewari R.P., Sharma S.</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/654">https://zhps.ejournal.by/jour/article/view/654</self-uri><abstract><p>Для исследования форстерит-гидроксиапатитного композитного покрытия на подложке из нержавеющей стали предлагается использовать КР-спектроскопию. Однако для выделения спектра КР требуется удаление шума и фона. Для коррекции фона применен метод сравнения. Основанное на вейвлет-подходе шумоподавление сигнала выполнено с помощью шестого уровня декомпозиции с вейвлетом sym4 при мягком преодолении порога. Проведено сравнение эффективности вейвлетметода шумоподавления с методами сглаживания Савицкого–Голея, квадратичной регрессии и фильтрации низких частот. Установлено, что метод вейвлет-шумоподавления работает лучше, чем другие методы, так как способен сглаживать сигнал и увеличивать отношение сигнал/шум, сохраняя пиковую интенсивность неискаженной. Пики рассчитаны для различных составов форстерит-гидроксиапатитного композита. Изменение расположения пиков в обработанных спектрах КР позволяет предположить, что изменение концентрации форстерита и гидроксиапатита в покрытии может быть исследовано с помощью спектроскопии КР.</p></abstract><trans-abstract xml:lang="en"><p>Raman spectroscopy is proposed here for the study of forsterite-hydroxyapatite (FS-HA) composite coating on a stainless-steel substrate. However, in order to analyze the Raman spectrum accurately, noise and background removal is always required. A comparative study has been done for the correction of background. The wavelet-based denoising of the signal was done using level 6 decomposition with sym4 wavelet and the thresholding method used was soft thresholding. In the present work, the effectiveness of the wavelet-based denoising method has been compared with Savitsky–Golay smoothing, quadratic regression, and low pass filter method. It is found that the wavelet-based denoising method works better as compared to other methods as it is able to smooth the signal and to increase the SNR while maintaining the peak intensity undistorted. Peaks are calculated for the different composition of the HA-FS composite. The variation of peak location in the processed Raman spectra suggests that the variation in concentration of FS and HA in the coating can be studied by using Raman spectroscopy.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>КР-спектроскопия</kwd><kwd>MATLAB</kwd><kwd>импульсное лазерное напыление</kwd><kwd>обработка сигналов</kwd><kwd>форстерит</kwd><kwd>нержавеющая сталь</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Raman spectroscopy</kwd><kwd>MATLAB</kwd><kwd>Pulse Laser Deposition</kwd><kwd>signal processing</kwd><kwd>Forsterite</kwd><kwd>stainless-steel</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">S.-I. Akimoto, Y. Matsui, Y. Syono, The Physics and Chemistry of Minerals and Rocks, 327 (1976).</mixed-citation><mixed-citation xml:lang="en">S.-I. Akimoto, Y. Matsui, Y. 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