creditcard Dataset

<b>Title:</b> Credit Card Transactions Dataset for Fraud Detection (Used in: A Hybrid Anomaly Detection Framework Combining Supervised and Unsupervised Learning)<b>Description:</b>This dataset, commonly known as <i>creditcard.csv</i>, contains anonymized credit card transactions made by European cardholders in September 2013. It includes 284,807 transactions, with 492 labeled as fraudulent. Due to confidentiality constraints, features have been transformed using PCA, except for 'Time' and 'Amount'.This dataset was used in the research article titled <i>"A Hybrid Anomaly Detection Framework Combining Supervised and Unsupervised Learning for Credit Card Fraud Detection"</i>. The study proposes an ensemble model integrating techniques such as Autoencoders, Isolation Forest, Local Outlier Factor, and supervised classifiers including XGBoost and Random Forest, aiming to improve the detection of rare fraudulent patterns while maintaining efficiency and scalability.<b>Key Features:</b>30 numerical input features (V1–V28, Time, Amount)Class label indicating fraud (1) or normal (0)Imbalanced class distribution typical in real-world fraud detection<b>Use Case:</b><br>Ideal for benchmarking and evaluating anomaly detection and classification algorithms in highly imbalanced data scenarios.<b>Source:</b><br>Originally published by the Machine Learning Group at Université Libre de Bruxelles.<br>https://www.kaggle.com/mlg-ulb/creditcardfraud<b>License:</b><br>This dataset is distributed for academic and research purposes only. Please cite the original source when using the dataset.<b>数据集名称：</b>用于欺诈检测的信用卡交易数据集（应用于：融合监督与无监督学习的混合异常检测框架研究）<b>数据集描述：</b>本数据集通常被称为<i>creditcard.csv</i>，收录了2013年9月欧洲信用卡持卡人的匿名化信用卡交易记录，总计284807笔，其中492笔被标记为欺诈交易。出于数据保密约束，除'Time'和'Amount'外，其余特征均通过主成分分析（PCA, Principal Component Analysis）完成变换处理。本数据集曾被用于题为<i>《面向信用卡欺诈检测的融合监督与无监督学习混合异常检测框架》</i>的研究论文。该研究提出了一款集成模型，整合了自编码器（Autoencoders）、孤立森林（Isolation Forest）、局部离群因子（Local Outlier Factor）等异常检测技术，以及XGBoost、随机森林（Random Forest）等监督分类器，旨在在保障模型效率与可扩展性的同时，提升对稀有欺诈交易模式的检测能力。<b>核心特征：</b>30个数值型输入特征（V1–V28、Time、Amount）；类别标签用于标记交易是否欺诈（1代表欺诈，0代表正常交易）；具备现实欺诈检测场景中典型的类别不平衡分布。<b>应用场景：</b><br>极适合作为基准数据集，用于评估高度类别不平衡场景下的异常检测与分类算法性能。<b>数据来源：</b><br>最初由布鲁塞尔自由大学机器学习组发布，可于Kaggle平台获取：https://www.kaggle.com/mlg-ulb/creditcardfraud<b>使用许可：</b><br>本数据集仅可用于学术与科研用途，使用该数据集时请引用原始数据来源。