LangChain Advanced RAG - Two-Stage Retrieval with Cross Encoder (BERT)
Coding Crash Courses
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Hello and welcome to my channel. I am a german software engineer who works in the AI Space. I love to learn new stuff and teach it to people :-). I already have got a german channel with a lot of videos and full courses on Python, JavaScript, React and much more. German channel: https://studio.youtube.com/channel/UCikLKUS0DZWMkukbkYDG49Q
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Video Description
In this Video we discuss advanced retrieval techniques from Vector Databases with Query Expansion and Two-Stage Retrieval with a Cross Encoder. We use another Reranker on top to take the famous "lost in the middle" problem into consideration. Code: https://github.com/Coding-Crashkurse/Applied-Advanced-RAG Timestamps: 0:00 Two-Stage Retrieval in theory 2:44 RAG and it´s issues 9:31 Query Expansion 11:50 Cross Encoder Reranking 13:50 LongContext Reorder #openai #langchain
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