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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">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2026-3-32-39</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-2440</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>ОБЩИЕ ВОПРОСЫ МЕТРОЛОГИИ И ИЗМЕРИТЕЛЬНОЙ ТЕХНИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>GENERAL PROBLEMS OF METROLOGY AND MEASUREMENT TECHNIQUES</subject></subj-group></article-categories><title-group><article-title>Модифицированная оценка коэффициента корреляции Пирсона: нормирование случайных величин по моде распределения</article-title><trans-title-group xml:lang="en"><trans-title>Modified estimation of the Pearson correlation coefficient: normalization of random variables according to the distribution mode</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0664-3870</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лапко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lapko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Васильевич Лапко, профессор; д-р техн. наук, профессор, главный научный сотрудник</p><p>660037, г. Красноярск, просп. «Красноярский рабочий», 31</p><p>660036, Красноярск, Академгородок, д. 50, стр. 44</p></bio><bio xml:lang="en"><p>Aleksandr V. Lapko, Professor; D. Sc. (Engineering), Professor, Chief Research Officer</p><p>660037, Krasnoyarsk, Krasnoyarsky Rabochy Av., 31</p><p>660036, Krasnoyarsk, Akademgorodok, 50, building 44</p></bio><email xlink:type="simple">lapko@icm.krasn.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6938-9323</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лапко</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lapko</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Василий Александрович Лапко, заведующий кафедрой; д-р техн. наук, профессор, ведущий научный сотрудник</p><p>660037, г. Красноярск, просп. «Красноярский рабочий», 31</p><p>660036, Красноярск, Академгородок, д. 50, стр. 44</p></bio><bio xml:lang="en"><p>Vasiliy A. Lapko, Head of Department; D. Sc. (Engineering), Professor, Leading Researcher</p><p>660037, Krasnoyarsk, Krasnoyarsky Rabochy Av., 31</p><p>660036, Krasnoyarsk, Akademgorodok, 50, building 44</p></bio><email xlink:type="simple">valapko@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный университет науки и технологий им. акад. М. Ф. Решетнёва; Институт вычислительного моделирования Сибирского отделения Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Reshetnev Siberian State University of Science and Technology; Institute of Computational Modelling of the Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>19</day><month>06</month><year>2026</year></pub-date><volume>75</volume><issue>3</issue><fpage>32</fpage><lpage>39</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/2440">https://www.izmt.ru/jour/article/view/2440</self-uri><abstract><p>Рассмотрены задачи структурного анализа статистических данных и построения линейных моделей стохастических зависимостей в условиях априорной неопределённости данных. Предложена и исследована модифицированная оценка коэффициента корреляции, которая является основой структурного анализа статистических данных. В отличие от традиционного коэффициента корреляции Пирсона модифицированная оценка основана на нормировании случайных величин по модам их плотностей вероятностей. Для поиска мод законов распределения использованы ядерные оценки плотностей вероятностей анализируемых случайных величин. Коэффициенты размытости ядерных функций непараметрических оценок плотностей вероятностей выбраны из условия максимума функции правдоподобия. Альтернативным подходом к выбору коэффициентов размытости является минимизация средних квадратических отклонений непараметрических оценок плотностей вероятностей. Исследованы оценки традиционного и модифицированного коэффициентов корреляции и рассмотрено их применение при построении линейных аппроксимаций статистических зависимостей. Использованы данные дистанционного зондирования тестового участка лесного массива, повреждённого сибирским шелкопрядом. Определены два набора пар спектральных признаков, отличающихся большими и малыми значениями рассматриваемых оценок коэффициентов корреляции. Сравнены оценки коэффициентов корреляции и проанализированы соответствующие им непараметрические оценки плотностей вероятностей спектральных признаков. При анализе ошибок линейных аппроксимаций зависимостей между спектральными признаками определены условия преимущества традиционной и модифицированной оценок коэффициентов корреляции. Полученные результаты можно применять при синтезе алгоритмов структурного анализа данных дистанционного зондирования природных объектов.</p></abstract><trans-abstract xml:lang="en"><p>The problems of structural analysis of statistical data and construction of linear models of stochastic dependencies under a priori uncertainty are considered. A modified estimate of the correlation coefficient is proposed and investigated, which forms the basis for the structural analysis of statistical data. Unlike the traditional Pearson correlation coefficient, the modified estimator is based on normalizing random variables by the modes of their probability densities. To find modes of distribution laws, kernel estimates of probability densities of the random variables being analyzed are used. The choice of the blurriness coefficients for the kernel functions of nonparametric probability density estimates is based on the condition of maximizing the likelihood function. An alternative approach to choosing blurriness coefficients is to minimize the standard deviations of nonparametric probability density estimates. Estimates of traditional and modified correlation coefficients are examined. Their application in constructing linear approximations of statistical relationships is discussed. For this purpose, remote sensing data from a test forest area damaged by the Siberian silk moth was used. Two sets of spectral feature pairs were identified, differing in the large and small values of the correlation coefficient estimates under consideration. The correlation coefficient estimates were compared, and the corresponding nonparametric probability density estimates for the spectral features were analyzed. In the analysis of errors in linear approximations of dependencies between spectral features, the conditions for the advantage of traditional and modified estimates of correlation coefficients were determined. The obtained results can be used in the synthesis of algorithms for structural analysis of remote sensing data of natural objects.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>модифицированный коэффициент корреляции</kwd><kwd>коэффициент корреляции Пирсона</kwd><kwd>линейные&#13;
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