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Graph anomaly detection (GAD) is crucial in applications like fraud detection and cybersecurity. Despite recent advancements using graph neural networks (GNNs), two major challenges persist. At the model level, most methods adopt a…

Machine Learning · Computer Science 2026-02-06 Chunyu Wei , Siyuan He , Yu Wang , Yueguo Chen , Yunhai Wang , Bing Bai , Yidong Zhang , Yong Xie , Shunming Zhang , Fei Wang

Generative Adversarial Networks (GAN) have promoted a variety of applications in computer vision, natural language processing, etc. due to its generative model's compelling ability to generate realistic examples plausibly drawn from an…

Machine Learning · Computer Science 2021-06-08 Zhipeng Cai , Zuobin Xiong , Honghui Xu , Peng Wang , Wei Li , Yi Pan

Identifying anomalies refers to detecting samples that do not resemble the training data distribution. Many generative models have been used to find anomalies, and among them, generative adversarial network (GAN)-based approaches are…

Machine Learning · Computer Science 2022-01-03 Laya Rafiee Sevyeri , Thomas Fevens

With the proliferation of Artificial Intelligence, there has been a massive increase in the amount of data required to be accumulated and disseminated digitally. As the data are available online in digital landscapes with complex and…

Cryptography and Security · Computer Science 2024-09-23 Md Mashrur Arifin , Md Shoaib Ahmed , Tanmai Kumar Ghosh , Ikteder Akhand Udoy , Jun Zhuang , Jyh-haw Yeh

The proliferation of generative models, such as Generative Adversarial Networks (GANs), Diffusion Models, and Variational Autoencoders (VAEs), has enabled the synthesis of high-quality multimedia data. However, these advancements have also…

Computer Vision and Pattern Recognition · Computer Science 2025-10-20 Arpan Mahara , Naphtali Rishe

Semi-supervised learning is sought for leveraging the unlabelled data when labelled data is difficult or expensive to acquire. Deep generative models (e.g., Variational Autoencoder (VAE)) and semisupervised Generative Adversarial Networks…

Machine Learning · Computer Science 2019-05-09 Xiang Zhang , Lina Yao , Feng Yuan

Advanced Persistent Threats (APTs) are sophisticated, long-term cyberattacks that are difficult to detect because they operate stealthily and often blend into normal system behavior. This paper presents a neuro-symbolic anomaly detection…

Machine Learning · Computer Science 2026-02-17 Asif Tauhid , Sidahmed Benabderrahmane , Mohamad Altrabulsi , Ahamed Foisal , Talal Rahwan

Generative adversarial network (GAN) has been shown to be useful in various applications, such as image recognition, text processing and scientific computing, due its strong ability to learn complex data distributions. In this study, a…

Geophysics · Physics 2021-09-14 Tianhao He , Dongxiao Zhang

Credit card fraud is a major issue nowadays, costing huge money and affecting trust in financial systems. Traditional fraud detection methods often fail to detect advanced and growing fraud techniques. This study focuses on using Graph…

Cryptography and Security · Computer Science 2025-04-01 Irin Sultana , Syed Mustavi Maheen , Naresh Kshetri , Md Nasim Fardous Zim

The decoder-based machine learning generative algorithms such as Generative Adversarial Networks (GAN), Variational Auto-Encoders (VAE), Transformers show impressive results when constructing objects similar to those in a training ensemble.…

Computer Vision and Pattern Recognition · Computer Science 2024-02-20 Gabriel Turinici

As the availability of financial services online continues to grow, the incidence of fraud has surged correspondingly. Fraudsters continually seek new and innovative ways to circumvent the detection algorithms in place. Traditionally, fraud…

Machine Learning · Computer Science 2024-11-25 Prashank Kadam

In this paper, we focused on using deep learning methods for detecting money laundering in financial transaction networks, in order to demonstrate that it can be used as a complement or instead of the more commonly used rule-based systems…

Machine Learning · Computer Science 2025-09-25 Mashkhal Abdalwahid Sidiq , Yimamu Kirubel Wondaferew

Computer network anomaly detection and log analysis, as an important topic in the field of network security, has been a key task to ensure network security and system reliability. First, existing network anomaly detection and log analysis…

Machine Learning · Computer Science 2024-09-17 Shuzhan Wang , Ruxue Jiang , Zhaoqi Wang , Yan Zhou

In this paper, an image recognition algorithm based on the combination of deep learning and generative adversarial network (GAN) is studied, and compared with traditional image recognition methods. The purpose of this study is to evaluate…

Computer Vision and Pattern Recognition · Computer Science 2024-08-08 Yihao Zhong , Yijing Wei , Yingbin Liang , Xiqing Liu , Rongwei Ji , Yiru Cang

Financial fraud detection is essential to safeguard billions of dollars, yet the intertwined entities and fast-changing transaction behaviors in modern financial systems routinely defeat conventional machine learning models. Recent…

Machine Learning · Computer Science 2025-08-29 Zeyue Zhang , Lin Song , Erkang Bao , Xiaoling Lv , Xinyue Wang

Performing anomaly detection in hybrid systems is a challenging task since it requires analysis of timing behavior and mutual dependencies of both discrete and continuous signals. Typically, it requires modeling system behavior, which is…

Machine Learning · Computer Science 2020-10-30 Nemanja Hranisavljevic , Oliver Niggemann , Alexander Maier

In addition to enhancing traffic safety and facilitating prompt emergency response, traffic incident detection plays an indispensable role in intelligent transportation systems by providing real-time traffic status information. This enables…

Machine Learning · Computer Science 2024-03-05 Xinying Lu , Doudou Zhang , Jianli Xiao

Unsupervised anomaly detection aims to identify anomalous samples from highly complex and unstructured data, which is pervasive in both fundamental research and industrial applications. However, most existing methods neglect the complex…

Machine Learning · Computer Science 2020-10-20 Haoyi Fan , Fengbin Zhang , Ruidong Wang , Liang Xi , Zuoyong Li

Generative adversarial networks (GANs) have been a popular deep generative model for real-world applications. Despite many recent efforts on GANs that have been contributed, mode collapse and instability of GANs are still open problems…

Computer Vision and Pattern Recognition · Computer Science 2021-03-24 Shiming Chen , Wenjie Wang , Beihao Xia , Xinge You , Zehong Cao , Weiping Ding

The goal of anomaly detection is to identify anomalous samples from normal ones. In this paper, a small number of anomalies are assumed to be available at the training stage, but they are assumed to be collected only from several anomaly…

Machine Learning · Computer Science 2022-05-03 Bowen Tian , Qinliang Su , Jian Yin
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