Rick W / Monday, April 28, 2025 / Categories: Artificial Intelligence Advanced Techniques to Build Your RAG System This post is divided into three parts; they are: • Query Expansion and Reformulation • Hybrid Retrieval: Dense and Sparse Methods • Multi-Stage Retrieval with Re-ranking One of the challenges in RAG systems is that the user's query might not match the terminology used in the knowledge base. Previous Article Building RAG Systems with Transformers Next Article How Responsible AI is Shaping the Future of Banking and Finance - with Shub Agarwal of U.S. Bank and USC Print 216