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Information Retrieval

Topic: IR

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Search Systems

AI for search.

Indexing

Inverted index. BM25. Dense retrieval.

Ranking

Learning to rank. Semantic matching. Re-ranking.

Systems

Elasticsearch. Solr. Vector search. Hybrid retrieval.

Key Takeaways

  1. BM25 for keyword search
  2. Dense retrieval for semantic
  3. Learning to rank

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