Category: ML Research

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Early termination in HNSW for faster approximate KNN search

Learn how HNSW can be made faster for KNN search, using smart early termination strategies.

Tommaso Teofili

Understanding optimized scalar quantization

In this post, we explain a new form of scalar quantization we've developed at Elastic that achieves state-of-the-art accuracy for binary quantization.

Thomas Veasey

cRank it up! - Introducing the Elastic Rerank model (in Technical Preview)

Get started in minutes with the Elastic Rerank model: powerful semantic search capabilities, with no required reindexing, provides flexibility and control over costs; high relevance, top performance, and efficiency for text search.

Shubha Anjur Tupil

Exploring depth in a 'retrieve-and-rerank' pipeline

Select an optimal re-ranking depth for your model and dataset.

Thanos Papaoikonomou

Introducing Elastic Rerank: Elastic's new semantic re-ranker model

Learn about how Elastic's new re-ranker model was trained and how it performs.

Thomas Veasey

Better Binary Quantization (BBQ) vs. Product Quantization

Why we chose to spend time working on Better Binary Quantization (BBQ) instead of product quantization in Lucene and Elasticsearch.

Benjamin Trent

What is semantic reranking and how to use it?

Introducing the concept of semantic reranking. Learn about the trade-offs using semantic reranking in search and RAG pipelines.

Thomas Veasey

RaBitQ binary quantization 101

Understand the most critical components of RaBitQ binary quantization, how it works and its benefits. This guide also covers the math behind the quantization and examples.

John Wagster

Comparing ELSER for retrieval relevance on the Hugging Face MTEB Leaderboard

This blog compares ELSER for retrieval relevance on the Hugging Face MTEB Leaderboard.

Aris Papadopoulos

Evaluating search relevance part 2 - Phi-3 as relevance judge

Using the Phi-3 language model as a search relevance judge, with tips & techniques to improve the agreement with human-generated annotation.

Thanos Papaoikonomou

Evaluating search relevance part 1 - The BEIR benchmark

Learn to evaluate your search system in the context of better understanding the BEIR benchmark, with tips & techniques to improve your search evaluation processes.

Thanos Papaoikonomou

Evaluating scalar quantization in Elasticsearch

Learn how scalar quantization can be used to reduce the memory footprint of vector embeddings in Elasticsearch through an experiment.

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