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cs.IR2025
Right Answer at the Right Time - Temporal Retrieval-Augmented Generation via Graph Summarization
Zulun Zhu, Haoyu Liu, Mengke He +1
Question answering in temporal knowledge graphs requires retrieval that is both time-consistent and efficient. Existing RAG methods are largely semantic and typically neglect expli…
cs.CV2025
When Deepfake Detection Meets Graph Neural Network:a Unified and Lightweight Learning Framework
Haoyu Liu, Chaoyu Gong, Mengke He +3
The proliferation of generative video models has made detecting AI-generated and manipulated videos an urgent challenge. Existing detection approaches often fail to generalize acro…
cs.DS2025
Near-Optimality for Single-Source Personalized PageRank
Xinpeng Jiang, Haoyu Liu, Siqiang Luo +1
The \emph{Single-Source Personalized PageRank} (SSPPR) query is central to graph OLAP, measuring the probability that an -decay random walk from node terminates at…