Tagged “hybrid-retrieval”

4 posts.

All Model Architecture23 Training & Alignment22 Inference & Serving24 Agents & Orchestration12 Reasoning & Evaluation28 Safety, Security & Governance9 Platforms & Practice22

Platforms & Practice 24 min

BM25 Refuses to Die: The Probabilistic Relevance Framework Behind Search's Most Durable Baseline

In 2021 a benchmark of 18 retrieval datasets found that a scoring function from 1994 still beat most neural retrievers outside their training domain. BM25 is not a heuristic that got lucky. It is a deliberate approximation of a p…

classical-ir information-retrieval ranking retrieval ∑ ◫

Platforms & Practice 24 min

Query Understanding Is the Hidden Half of Search: From Broder's Taxonomy to LLM Query Rewriting

An LLM-written pseudo-document lifts BM25 by 15 nDCG@10 points on TREC DL 2019, and turns a 16 ms search into one that waits over two seconds for the model. Query understanding decides what the engine searches for before ranking …

query-understanding information-retrieval retrieval rag ∑ ◫

Reasoning & Evaluation 24 min

The Leaderboard Is Not Your Corpus: Why Top-Ranked Embedding Models Disappoint in Production

Embedding models are chosen from a leaderboard more often than from an experiment, and the leaderboard now publishes training splits for its own test sets. Between contamination, task-family averaging and geometry no benchmark me…

embeddings retrieval-rag evaluation benchmarks ∑ ◫

Platforms & Practice 24 min

What Structure Buys You: Knowledge Graphs in the Age of Language Models

In 2019 a masked language model recalled facts almost as well as a relation extractor with an oracle entity linker, and people asked whether knowledge graphs were finished. They were not, but the reason is narrower than their adv…

knowledge-graphs rag retrieval hybrid-retrieval ∑ ◫