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#BM25

3 posts tagged "bm25"

3

Part 3 — RAG 完全指南(三):進階檢索技術——混合搜尋、HyDE、Multi-Query、Reranker

Naive RAG 的搜尋精準度不夠?本篇深入四大進階檢索技術:BM25 混合搜尋、假設性文件嵌入(HyDE)、多查詢檢索(Multi-Query)、以及 Cross-Encoder Reranker,每個都有核心原理、程式碼與最佳使用場景。

May 18, 2026 ·30 min aiengineering
4

Part 4 — FDE core topic - Hybrid Search & RRF:混合檢索與倒數排名融合演算法

深入解析混合檢索(Dense + Sparse)與 Reciprocal Rank Fusion 的核心原理、實作層次及面試答題策略,涵蓋 BM25、HNSW、SPLADE、Vertex AI Search 等關鍵技術與具體效能數字。

Jun 8, 2026 ·18 min engineering

ChatPDF RAG 優化(一):語意切塊與混合檢索 Semantic Chunking + Hybrid Retrieval

RAG 的成敗,八成決定在「切塊」與「檢索」這兩步。本篇拆解 chatPDF 如何從寫死的固定切塊,升級成 embedding 偵測語意轉折的 Semantic Chunking,以及如何把 dense 向量檢索與 BM25 關鍵字檢索融合成 Hybrid Retrieval——附完整 Python 實作與設計取捨。

Jun 30, 2026 ·16 min aiengineering

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