TMR-GGNN: Credit Card Fraud Detection based on Time-Aware Multi-Relational Guided Graph Neural Network

In three linesTMR-GGNN, a time-aware multi-relational graph neural network, detects credit card fraud by modeling heterogeneous interactions between customers, merchants, devices, and IPs. The model combines temporal relational attention, contrastive learning, and a composite loss function (InfoNCE + Focal Loss) to handle imbalanced data and reduce false negatives.

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