更新CLAUDE.md,删除wiki/concepts空文件
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title: "Retrieval"
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type: concept
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tags: [RAG, 检索, 向量搜索]
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---
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## Definition
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Retrieval是根据问题语义向量检索相关文档的过程,是RAG的第二阶段。
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## Core Mechanism
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1. 问题向量化:将用户问题通过Embedding Model转为向量
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2. 相似度计算:在Vector Store中计算相似度
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3. Top-K选取:返回最相关的K个文档片段
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## Key Properties
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- 依赖语义相似度
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- 受Embedding Model质量影响
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- 可结合关键词过滤
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## Connections
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- [[RAG]] ← 阶段2 ← [[Retrieval]]
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- [[Indexing]] ← 上游 ← [[Retrieval]]
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- [[Generation]] ← 下游 ← [[Retrieval]]
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- [[Embedding Vector]] ← 依赖 ← [[Retrieval]]
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- [[Vector Store]] ← 数据源 ← [[Retrieval]]
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