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TF-IDF

Explore machine learning concepts related to TF-IDF. Clear explanations and practical insights.

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Concepts Related to TF-IDF

January 21, 2025

Sparse vs Dense vs Hybrid Retrieval: BM25, BERT, and Reranking Compared

How sparse retrieval (BM25/TF-IDF), dense retrieval (BERT-style embeddings), and hybrid systems that combine both compare on recall, semantic understanding, computational cost, and operational complexity for modern search.

Sparse Embeddings Dense Embeddings BM25 TF-IDF BERT Hybrid Search Retrieval

12 min readConcept

August 16, 2024

BM25 Algorithm for Text Retrieval

Master the BM25 algorithm, the probabilistic ranking function powering Elasticsearch and Lucene for keyword-based document retrieval and search systems.

BM25 Retrieval Ranking Sparse Retrieval TF-IDF Search

12 min readConcept