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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">kaz29</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Казахстанско-Британского технического университета</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of the Kazakh-British Technical University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-6688</issn><issn pub-type="epub">2959-8109</issn><publisher><publisher-name>Казахстанско-Британский Технический Университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.55452/1998-6688-2026-23-2-242-249</article-id><article-id custom-type="elpub" pub-id-type="custom">kaz29-2905</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>КОМПЬЮТЕРНЫЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>COMPUTER SCIENCE</subject></subj-group></article-categories><title-group><article-title>МЕТОД НА ОСНОВЕ SMOTE ДЛЯ ПОВЫШЕНИЯ ЭФФЕКТИВНОСТИ ОБНАРУЖЕНИЯ МОШЕННИЧЕСТВА С КРЕДИТНЫМИ КАРТАМИ</article-title><trans-title-group xml:lang="en"><trans-title>AN SMOTE-BASED METHOD FOR ENHANCING CREDIT CARD FRAUD DETECTION</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-3923-6746</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Азизов</surname><given-names>Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Azizov</surname><given-names>T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магистрант.</p><p>Алматы</p></bio><bio xml:lang="en"><p>Master’s student.</p><p>Almaty</p></bio><email xlink:type="simple">timazizov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8702-511X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Aбдиахметова</surname><given-names>З.</given-names></name><name name-style="western" xml:lang="en"><surname>Abdiakhmetova</surname><given-names>Z.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ассоциированный профессор.</p><p>Алматы</p></bio><bio xml:lang="en"><p>Associate Professor.</p><p>Almaty</p></bio><email xlink:type="simple">zukhra.abdiakhmetova@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Казахстанско-Британский технический университет<country>Казахстан</country></aff><aff xml:lang="en">Kazakh-British Technical University<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Казахский Национальный университет им. аль-Фараби<country>Казахстан</country></aff><aff xml:lang="en">Al-Farabi Kazakh National University<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>27</day><month>06</month><year>2026</year></pub-date><volume>23</volume><issue>2</issue><fpage>242</fpage><lpage>249</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Азизов Т., Aбдиахметова З., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Азизов Т., Aбдиахметова З.</copyright-holder><copyright-holder xml:lang="en">Azizov T., Abdiakhmetova Z.</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://vestnik.kbtu.edu.kz/jour/article/view/2905">https://vestnik.kbtu.edu.kz/jour/article/view/2905</self-uri><abstract><p>Мошенничество с кредитными картами чаще встречается при онлайн-покупках, поэтому крайне важно использовать более эффективные способы его обнаружения, чтобы избежать финансовых потерь. В данной статье рассматривается выявление мошенничества с помощью методов генерации синтетических данных для улучшения моделей. Мы используем набор данных о транзакциях по кредитным картам Kaggle, реализуя генерацию синтетических данных с помощью SMOTE для балансировки набора данных, в котором случаи мошенничества составляют всего 0,2% случаев, и проводим разработку признаков для лучшего понимания поведения покупателей. Мы экспериментируем с пятью моделями машинного обучения: XGBoost, LightGBM, Random Forest, Neural Networks и Logistic Regression, уделяя особое внимание точности, полноте, F1-оценке и достоверности. Сравнение показывает, что XGBoost достигает наивысшей F1-оценки (82,57%) при хорошей точности (93,75%) и полноте (73,77%), что свидетельствует о способности XGBoost сбалансировать ложноположительные и ложноотрицательные результаты. Хотя все модели показали высокую точность (более 99,9%), в данном исследовании основное внимание уделяется точности и полноте при выявлении мошенничества. Результаты показывают, что сочетание синтетических данных с алгоритмами градиентного усиления может помочь системам обнаружения мошенничества повысить безопасность онлайн-покупок.</p></abstract><trans-abstract xml:lang="en"><p>Credit card fraud occurs most often in online purchases; therefore, it is crucial to employ better ways to find it to avoid financial loss. This paper discusses fraud detection by employing methods to generate synthetic data to improve detection models. We use the Kaggle credit card transaction dataset, implementing synthetic data generation using SMOTE as a way to balance the dataset, in which fraud cases comprise only 0.2% of cases, and perform feature engineering to better understand buying behavior. We experimented with five ML models–XGBoost, LightGBM, Random Forest, Neural Networks, and Logistic Regression; focusing on precision, recall, F1-score, and accuracy. The comparison indicates that XGBoost achieves its highest F1-score (82.57%) with good precision (93.75%) and recall (73.77%), indicating XGBoost can balance false positives and false negatives. Although all models performed with high accuracy (over 99.9%), this research focuses on highlighting precision and recall in fraud detection. The findings suggest that combining synthetic data with gradient-boosting algorithms can help fraud detection systems improve the security of online purchases.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>мошенничество с кредитными картами</kwd><kwd>SMOTE</kwd><kwd>машинное обучение</kwd><kwd>XGBoost</kwd><kwd>несбалансированные данные</kwd><kwd>онлайн-транзакции</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Credit card fraud</kwd><kwd>SMOTE</kwd><kwd>Machine learning</kwd><kwd>XGBoost</kwd><kwd>Imbalanced data</kwd><kwd>Online transactions</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">Dorfleitner, G., and Jahnes, K. Banking fraud: Global financial impact and detection methodologies. Journal of Financial Crime, 29 (2), 456–471 (2022).</mixed-citation><mixed-citation xml:lang="en">Dorfleitner, G., and Jahnes, K. 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