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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Informacionnye Tehnologii</journal-id><journal-title-group><journal-title xml:lang="en">Informacionnye Tehnologii</journal-title><trans-title-group xml:lang="ru"><trans-title>Информационные технологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1684-6400</issn><publisher><publisher-name xml:lang="en">New Technologies Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">708389</article-id><article-id pub-id-type="doi">10.17587/it.32.300-308</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Neural network technologies</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Нейросетевые технологии</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Intelligent segmentation of anomalies in oceanographic data: comparative analysis of BiLSTM and TCN on time and time-frequency representations</article-title><trans-title-group xml:lang="ru"><trans-title>Интеллектуальная сегментация аномалий в океанографических данных: сравнительный анализ BiLSTM и TCN на временных и частотно-временных представлениях</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Korotchenko</surname><given-names>R. A.</given-names></name><name xml:lang="ru"><surname>Коротченко</surname><given-names>Р. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D., Senior Researcher</p></bio><bio xml:lang="ru"><p>канд. техн. наук, ст. науч. сотр.</p></bio><email>kosheleva@poi.dvo.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kosheleva</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Кошелева</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Researcher</p></bio><bio xml:lang="ru"><p>науч. сотр.</p></bio><email>kosheleva@poi.dvo.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">V. I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Тихоокеанский океанологический институт им. В. И. Ильичева ДВО РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-06-09" publication-format="electronic"><day>09</day><month>06</month><year>2026</year></pub-date><volume>32</volume><issue>6</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>300</fpage><lpage>308</lpage><history><date date-type="received" iso-8601-date="2026-06-08"><day>08</day><month>06</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-06-08"><day>08</day><month>06</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Informacionnye Tehnologii</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Информационные технологии</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Informacionnye Tehnologii</copyright-holder><copyright-holder xml:lang="ru">Информационные технологии</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/1684-6400/article/view/708389">https://journals.eco-vector.com/1684-6400/article/view/708389</self-uri><abstract xml:lang="en"><p>This paper concerns the use of Deep Learning methods and Neural Networks for the task of segmentation and classification of hydrophysical time series in order to identify anomalies of a certain type caused by hardware failures. Two models based on Bidirectional Long-Short Term Memory networks and one based on a Temporal Convolutional Network were used. We made the performance comparisons and assessed the detection success. The results obtained demonstrate the effectiveness of the proposed approaches, and it was found that time-frequency analysis significantly improves the models’ ability to detect anomalies of different types.</p></abstract><trans-abstract xml:lang="ru"><p>Исследуется применение глубоких нейронных сетей для сегментации и классификации гидрофизических временных рядов в целях выявления и устранения аномалий, обусловленных аппаратными сбоями. Были использованы две модели на основе двунаправленных сетей с долгой краткосрочной памятью и одна на основе темпоральной сверточной сети. Выполнено сравнение производительности и оценена успешность обнаружения. Результаты демонстрируют эффективность предложенных подходов, при этом выявлено, что анализ частотно-временных признаков значительно повышает способность моделей детектировать аномалии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>anomaly detection</kwd><kwd>hardware failures</kwd><kwd>deep learning</kwd><kwd>time series segmentation</kwd><kwd>neural network</kwd><kwd>classification</kwd><kwd>time-frequency analysis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>обнаружение аномалий</kwd><kwd>аппаратные сбои</kwd><kwd>глубокое обучение</kwd><kwd>сегментация временных рядов</kwd><kwd>нейронная сеть</kwd><kwd>классификация</kwd><kwd>частотно-временной анализ</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source><award-id>124022100074-9</award-id></award-group><funding-statement xml:lang="en">The research was carried out as a part of the Russian State assignment on the topic 124022100074-9 "Study of the nature of linear and nonlinear interaction of geospheric fields of transition zones of the World Ocean and their consequences"</funding-statement><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания по теме 124022100074-9 "Изучение природы линейного и нелинейного взаимодействия геосферных полей переходных зон Мирового океана и их последствий"</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Kosheleva A. 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