Author

Ping-Hui Wang

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Preprint Oct 2026

Risk-aware Road-network Trajectory Synthesis under Local Differential Privacy

Road-network trajectory synthesis under local differential privacy (LDP) enables mobility data analysis without uploading raw trajectories to an untrusted server. Existing locally private trajectory synthesis methods mainly model whole trajectories, point sequences, or grid-level mobility patterns. However, they cannot...

Hong-Zhen Xiang, Chen-Xu Wang, Yumeng Song et al. · 0 citations

#machine learning Preprint Sep 2026

HOPE: Heterophily-Aware Open-Set Node Classification with Pseudo-Extrapolation

To adapt open-set graph neural networks to heterophilic scenarios, HOPE uses a structure-augmented feature initialization layer to capture multi-hop structural patterns, and introduces a heterophily-guided pseudo-extrapolation strategy to enhance unknown-class rejection.

Yumeng Dai, Yue Tan, Yi-Xin Liu et al. · 0 citations