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| Model | MAP | NDCG | P@20 | NDCG@20 | P@100 | NDCG@100 | Notes |
|---|---|---|---|---|---|---|---|
| QL (Dir) | 0.2837 | 0.5306 | 0.5667 | 0.5054 | 0.3981 | 0.4541 |
|
| RM3 | 0.2982 | 0.5381 | 0.5476 | 0.5054 | 0.4038 | 0.4768+ | Sweep mu, fbDocs, fbTerms, and lambda |
| Pubmed | 0.3076+ | 0.5853+ | 0.5381 | 0.4855 | 0.4248 | 0.4501 | Use mu=2500 for pubmed query sweeping fbDocs, fbTerms, and lambda. Sweep mu for final retrieval. |
| Wikipedia | 0.2947 | 0.5956+ | 0.5738 | 0.4956 | 0.4062 | 0.4487 | Use mu=2500 for wikipedia query sweeping fbDocs, fbTerms, and lambda. Sweep mu for final retrieval. |
| SDM | 0.2874 | 0.5558 | 0.4833 | 0.4706 | 0.4019 | 0.4559 | Sweep mu, w1, w2, w3 |
| FDM | 0.293 | 0.5594+ | 0.5500 | 0.4960 | 0.3933 | 0.4560 | Sweep mu, w1, w2, w3 |
| Dir (Krovetz) | 0.2944+ | 0.5443+ | 0.5905+ | 0.5150 | 0.4033 | 0.4601 | Sweep mu, krovetz-stemmed queries |
+ indicates significant improvement over QL (Dir) baselines (p < 0.05)