Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks
The high prevalence of fraud in contemporary financial transactions necessitates advanced anomaly detection systems to address the significant imbalance between legitimate and anomalous transactions in real-time datasets. To address this issue, our study introduces a novel approach, the regularized...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016824012523 |
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| author | Junhak Lee Dayeon Jung Jihoon Moon Seungmin Rho |
| author_facet | Junhak Lee Dayeon Jung Jihoon Moon Seungmin Rho |
| author_sort | Junhak Lee |
| collection | DOAJ |
| description | The high prevalence of fraud in contemporary financial transactions necessitates advanced anomaly detection systems to address the significant imbalance between legitimate and anomalous transactions in real-time datasets. To address this issue, our study introduces a novel approach, the regularized generative adversarial network (R-GAN). Diverging from conventional resampling techniques and typical generative adversarial network (GAN) architectures, R-GAN incorporates spectral normalization for the STGAN (short for spectral normalization for GAN) generator framework, which enhances it with a similarity measure loss to improve the authenticity of the generated data. The discriminator is meticulously designed, leveraging the CELU (short for continuously differentiable exponential linear unit) activation for optimal feature extraction, ensuring diverse and representative sample generation. To ensure fairness and validate the effectiveness of our data generation process, we used PyCaret's automated machine learning framework to rigorously test different machine learning models, ultimately identifying the light gradient boosting machine as the most effective. To add transparency to our system, we applied Shapley additive explanations (SHAP), providing clear insights into the decisions made by our explainable artificial intelligence-driven model. This approach ensures high-fidelity anomaly detection in real-time environments and continuously refines through SHAP insights, significantly addressing imbalanced datasets across various applications. |
| format | Article |
| id | doaj-art-e0f8ee76776c4573bf054092e529f440 |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-e0f8ee76776c4573bf054092e529f4402025-01-18T05:03:42ZengElsevierAlexandria Engineering Journal1110-01682025-01-01111491510Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networksJunhak Lee0Dayeon Jung1Jihoon Moon2Seungmin Rho3Department of Industrial Security, Chung-Ang University, Seoul 06974, South KoreaDepartment of Industrial Security, Chung-Ang University, Seoul 06974, South KoreaDepartment of AI and Big Data, Soonchunhyang University, Asan 31538, South Korea; Corresponding authors.Department of Industrial Security, Chung-Ang University, Seoul 06974, South Korea; Corresponding authors.The high prevalence of fraud in contemporary financial transactions necessitates advanced anomaly detection systems to address the significant imbalance between legitimate and anomalous transactions in real-time datasets. To address this issue, our study introduces a novel approach, the regularized generative adversarial network (R-GAN). Diverging from conventional resampling techniques and typical generative adversarial network (GAN) architectures, R-GAN incorporates spectral normalization for the STGAN (short for spectral normalization for GAN) generator framework, which enhances it with a similarity measure loss to improve the authenticity of the generated data. The discriminator is meticulously designed, leveraging the CELU (short for continuously differentiable exponential linear unit) activation for optimal feature extraction, ensuring diverse and representative sample generation. To ensure fairness and validate the effectiveness of our data generation process, we used PyCaret's automated machine learning framework to rigorously test different machine learning models, ultimately identifying the light gradient boosting machine as the most effective. To add transparency to our system, we applied Shapley additive explanations (SHAP), providing clear insights into the decisions made by our explainable artificial intelligence-driven model. This approach ensures high-fidelity anomaly detection in real-time environments and continuously refines through SHAP insights, significantly addressing imbalanced datasets across various applications.http://www.sciencedirect.com/science/article/pii/S1110016824012523Generative adversarial network (GAN)Imbalanced dataAnomaly detectionMachine learningExplainable artificial intelligence (XAI) |
| spellingShingle | Junhak Lee Dayeon Jung Jihoon Moon Seungmin Rho Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks Alexandria Engineering Journal Generative adversarial network (GAN) Imbalanced data Anomaly detection Machine learning Explainable artificial intelligence (XAI) |
| title | Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks |
| title_full | Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks |
| title_fullStr | Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks |
| title_full_unstemmed | Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks |
| title_short | Advanced R-GAN: Generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks |
| title_sort | advanced r gan generating anomaly data for improved detection in imbalanced datasets using regularized generative adversarial networks |
| topic | Generative adversarial network (GAN) Imbalanced data Anomaly detection Machine learning Explainable artificial intelligence (XAI) |
| url | http://www.sciencedirect.com/science/article/pii/S1110016824012523 |
| work_keys_str_mv | AT junhaklee advancedrgangeneratinganomalydataforimproveddetectioninimbalanceddatasetsusingregularizedgenerativeadversarialnetworks AT dayeonjung advancedrgangeneratinganomalydataforimproveddetectioninimbalanceddatasetsusingregularizedgenerativeadversarialnetworks AT jihoonmoon advancedrgangeneratinganomalydataforimproveddetectioninimbalanceddatasetsusingregularizedgenerativeadversarialnetworks AT seungminrho advancedrgangeneratinganomalydataforimproveddetectioninimbalanceddatasetsusingregularizedgenerativeadversarialnetworks |