Tag
bm25
- Jun 26, 2025 Hybrid Lexical and Dense Retrieval: Fusing Two Ranked Lists Why BM25 and embeddings fail on different queries, how reciprocal rank fusion combines their lists without comparable scores, and where the fusion still loses. inference systems
- May 23, 2025 Score Normalization and Rank Fusion Across Retrievers Why scores from different retrievers cannot be compared, how score distributions are normalized, and what reciprocal rank fusion gives up to avoid the problem. information retrieval
- Jul 25, 2022 BM25 Term Saturation and Document Length Normalization How the BM25 scoring function bounds the reward for repeated query terms, what the k1 and b parameters actually control, and where the model breaks down. information retrieval
- Nov 26, 2021 Disjunction-Max Combination for Multi-Field Scoring Why scoring each field separately and summing produces runaway scores, and how max-plus-tiebreaker combination keeps field evidence bounded. information retrieval