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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">Computational nanotechnology</journal-id><journal-title-group><journal-title xml:lang="en">Computational nanotechnology</journal-title><trans-title-group xml:lang="ru"><trans-title>Computational nanotechnology</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-223X</issn><issn publication-format="electronic">2587-9693</issn><publisher><publisher-name xml:lang="en">YUR-VAK</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">350195</article-id><article-id pub-id-type="doi">10.33693/2313-223X-2025-12-3-152-159</article-id><article-id pub-id-type="edn">BRJDPD</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>INFORMATICS AND INFORMATION PROCESSING</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ИНФОРМАТИКА И ИНФОРМАЦИОННЫЕ ПРОЦЕССЫ</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">Recovery of electron density signals beyond the operating range of the measuring instrument</article-title><trans-title-group xml:lang="ru"><trans-title>Восстановление сигнала электронной плотности при выходе за пределы рабочего диапазона измерительного прибора</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7844-1768</contrib-id><name-alternatives><name xml:lang="en"><surname>Leshov</surname><given-names>Nikolai V.</given-names></name><name xml:lang="ru"><surname>Лешов</surname><given-names>Николай Валерьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>postgraduate student, Department of Mathematical Cybernetics and Information Technologies</p></bio><bio xml:lang="ru"><p>аспирант, кафедра «Математическая кибернетика и информационные технологии»</p></bio><email>nikolya.leshov@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0942-9837</contrib-id><name-alternatives><name xml:lang="en"><surname>Shcherbak</surname><given-names>Anastasia N.</given-names></name><name xml:lang="ru"><surname>Щербак</surname><given-names>Анастасия Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>leading engineer, Laboratory of Tokamak Plasma Diagnostics and Plasma Physics, Department of Tokamak and Current-Carrying Plasma Physics</p></bio><bio xml:lang="ru"><p>ведущий инженер, лаборатория диагностики плазмы токамаков и физики плазменных процессов отделения физики токамаков-реакторов и токонесущей плазмы</p></bio><email>shcherbak@triniti.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1739-9831</contrib-id><name-alternatives><name xml:lang="en"><surname>Gorodnichev</surname><given-names>Mikhail G.</given-names></name><name xml:lang="ru"><surname>Городничев</surname><given-names>Михаил Геннадьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Eng.), Associate Professor, Dean, Faculty “Information Technology”</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент, декан, факультет «Информационные технологии»</p></bio><email>m.g.gorodnichev@mtuci.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow Technical University of Communications and Informatics (MTUCI)</institution></aff><aff><institution xml:lang="ru">Московский технический университет связи и информатики (МТУСИ)</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">State Research Centre of the Russian Federation Troitsk Institute for Innovation and Fusion Research</institution></aff><aff><institution xml:lang="ru">Государственный научный центр Российской Федерации Троицкий институт инновационных и термоядерных исследований</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-11-02" publication-format="electronic"><day>02</day><month>11</month><year>2025</year></pub-date><volume>12</volume><issue>3</issue><fpage>152</fpage><lpage>159</lpage><history><date date-type="received" iso-8601-date="2025-11-07"><day>07</day><month>11</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Yur-VAK</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Юр-ВАК</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Yur-VAK</copyright-holder><copyright-holder xml:lang="ru">Юр-ВАК</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://www.urvak.ru/contacts/</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rcsi.science/2313-223X/article/view/350195">https://journals.rcsi.science/2313-223X/article/view/350195</self-uri><abstract xml:lang="en"><p>Machine learning models have been widely incorparated into control systems aimed at improving the operational efficiency of tokamaks. The training machine learning models requires substantial datasets. However, data collection is limited because experimental campaigns on tokamaks are prolonged in time. Furthermore, the amount of suitable training data may decrease due to the present of faulty diagnostic signals. Additionally, the frequency of faulty signal occurrences increases while initial operation of a new tokamak or specialized equipment. This work examines the possibility of recovering faulty signals using machine learning techniques. Particularly, we focus on recovering signals obtained beyond the operating range of measuring instruments. Thus, recovering such kind of signals should increase the volume of available training data, consequently enhancing the efficacy of machine learning-based model training.</p></abstract><trans-abstract xml:lang="ru"><p>Модели машинного обучения широко внедряются в системы контроля и управления, необходимые для повышения эффективности работы токамака. Для обучения моделей требуется использовать большое количество данных, но в связи с тем, что экспериментальные кампании на токамаке продолжительны во времени, сбор данных ограничен. При этом, во время отбора количество пригодных для обучения данных может еще сократиться в связи с выявлением среди них некорректных (ошибочных) сигналов диагностик. А во время введения в полноценную эксплуатацию нового токамака или отдельного оборудования, частота появления ошибочных сигналов возрастает. В рамках данной работы, мы предлагаем изучить возможность восстановления полученных сигналов с ошибками с помощью моделей машинного обучения. В частности, мы рассматриваем сигналы, полученные при превышении диапазона работы измерительного прибора. За счет восстановленных сигналов предлагается увеличить объем данных для обучения, и тем самым повысить эффективность обучения конечных моделей.</p></trans-abstract><kwd-group xml:lang="en"><kwd>tokamak</kwd><kwd>plasma density</kwd><kwd>interferometry</kwd><kwd>artificial neural network</kwd><kwd>signal recovery</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>токамак</kwd><kwd>электронная плотность плазмы</kwd><kwd>интерферометрия</kwd><kwd>искусственные нейронные сети</kwd><kwd>восстановление сигнала</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Wesson J. Tokamaks. 4th ed. Oxford University Press, 2011. 828 p. (International Series of Monographs on Physics)</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>O’Shea F. H. et al. Coincidence anomaly detection for unsupervised locating of edge localized modes in the DIII-D tokamak dataset. Machine Learning: Science and Technology. 2024. 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