Tag
scoring
- Oct 6, 2026 Synonym Expansion at Index Time Versus Query Time Why expanding a thesaurus into the index and expanding it into the query produce the same postings but different costs, and how each choice changes scoring and phrase matching. information retrieval
- May 17, 2026 Query-Time Cost and the Conjunctive Fast Path What dominates the latency of a term-based query, how a conjunction of rare and common terms is evaluated, and where the unavoidable costs of scoring live. information retrieval
- Apr 27, 2026 Score Calibration for Blended Ranking Why a ranker optimized for ordering produces scores with no absolute meaning, how to fit a monotone calibration, and what breaks when the query mix shifts. information retrieval
- Apr 11, 2026 Diversity-Aware Ranking and Subtopics How ambiguous queries are covered by selecting results that span subtopics, what maximal marginal relevance maximizes, and why diversity costs relevance. information retrieval
- Apr 6, 2026 Static Rank Priors and Their Effect on Ranking How document-level signals that ignore the query accumulate into a prior, how that prior is combined with query-dependent scores, and why it can dominate a weak match. information retrieval
- Sep 18, 2025 Query-Document Feature Extraction for Learned Ranking How match statistics, proximity windows, and coverage ratios are computed from position lists, and what each feature measures that a bag-of-words score cannot. 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