Sparse embedding의 한계
Dense Embedding
Dense Encoder
Negative Sampling
Dense Encoding 개선
MIPS (Maximum Inner Product Search)
Tradeoffs of similarity search
brute-force 검색 결과와 얼마나 비슷한지?
FAISS
효율적인 similarity search를 위한 라이브러리
Passage Retrieval with FAISS
Train index and map vector
Search based on FAISS index
Retriever - Reader
Issues & Recent Approaches