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Privacy Preserving Point-of-Interest Recommendation Using Decentralized Matrix Factorization
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Measured effects reported in the paper
| What was changed | Where | Measured | Effect |
|---|---|---|---|
| add personal (local) item factor to global-only DMF (GDMF -> DMF) (ablation) | DMF · Foursquare K=5 | R@5: 0.1245 -> 0.1562 | Helped |
| add personal (local) item factor to global-only DMF (GDMF -> DMF) (ablation) | DMF · Alipay K=5 | R@5: 0.0937 -> 0.1128 | Helped |
| add gradient exchange among neighbors to local-only DMF (LDMF -> DMF) (ablation) | DMF · Foursquare K=5 | R@5: 0.0125 -> 0.1562 | Helped |
| add gradient exchange among neighbors to local-only DMF (LDMF -> DMF) (ablation) | DMF · Alipay K=5 | R@5: 0.0042 -> 0.1128 | Helped |
| decentralized DMF vs centralized MF | MF · Alipay K=5 | P@5 / R@5: +27.75% P@5, +25.89% R@5 | Helped |
| DMF vs pairwise-loss BPR | BPR · Foursquare/Alipay K=15 | P@5: Foursquare K=15 P@5 0.0448 -> 0.0421 | Mixed |
| increase random walk distance D (ablation) | DMF · Foursquare and Alipay K=5 | precision/recall | Helped |
| increase latent dimension K from 5 to 15 | all models · Foursquare/Alipay | P@k, R@k: DMF Foursquare R@10 0.2418 -> 0.3035 | Helped |
| tune global/local regularizers beta, gamma to balance own and neighbor data (ablation) | DMF · Foursquare and Alipay | precision/recall | Helped |
Closest papers by meaning
- Confidence-Aware Matrix Factorization for Recommender Systems (AAAI 2018 · similarity 0.85)
- Inferring a Personalized Next Point-of-Interest Recommendation Model with Latent Behavior Patterns (AAAI 2016 · similarity 0.85)
- Recommendations with Sparse Comparison Data: Provably Fast Convergence for Nonconvex Matrix Factorization (ICML 2025 · similarity 0.84)
- GeoMamba: Towards Multi-granular POI Recommendation with Geographical State Space Model (AAAI 2025 · similarity 0.83)
- Learning Time Slot Preferences via Mobility Tree for Next POI Recommendation (AAAI 2024 · similarity 0.83)
- Federated Binary Matrix Factorization Using Proximal Optimization (AAAI 2025 · similarity 0.82)
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