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searchengine's Introduction

搜索引擎技术

  1. 搜索引擎基础

  2. 相关性

    • 相关性的定义与分档 [slides]

    • 相关性的评价指标 [slides]

    • 文本匹配分数 [slides]

    • 相关性BERT模型及其推理 [slides]

    • 相关性BERT模型的训练 [slides]

  3. 查询词处理

    • 分词:基于字典匹配的方法 & 新词发现

    • 分词:基于深度学习的方法

    • 词权重 (Term Weight)

    • 类目识别

    • 意图识别

    • 查询词改写

  4. 召回

    • 倒排索引和文本召回

    • 向量召回

    • 缓存召回

  5. 排序

    • 排序的原理

    • 融合模型的训练方法

  6. 查询词推荐

    • 查询词推荐的场景

    • 查询词推荐的召回

    • 查询词推荐的排序

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searchengine's Issues

typo

QP 是链路上的第一环,用自然语言处理(natural language processing,NLP)技术从查询词中提取很多信息,共链路下游的召回和排序使用。

共->供;

为课程提供一份代码实现

感谢王树森老师深入浅出的讲解,工业界搜索是如何做的。我计划在自己的开源项目中,实现下王树森老师讲解的相关性BERT模型训练所涉及到的loss,以及两者的多任务学习。
1.MSE和交叉熵建模回归任务,建模相关性的绝对值。
2.pairwise logistic损失函数,建模顺序。

项目地址:https://github.com/NLPJCL/RAG-Retrieval

目前,RAG-Retrieval 提供了全链路的RAG检索微调(train)和推理(infer)代码。
对于微调,支持微调任意开源的RAG检索模型,包括向量(embedding)、迟交互式模型(colbert)、交互式模型(cross encoder)。
对于推理,RAG-Retrieval专注于排序(reranker),开发了一个轻量级的python库rag-retrieval,提供统一的方式调用任意不同的RAG排序模型。

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