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🧠 AI NeutralImportance 4/10

Automatic In-Domain Exemplar Construction and LLM-Based Refinement of Multi-LLM Expansions for Query Expansion

arXiv – CS AI|Minghan Li, Ercong Nie, Siqi Zhao, Tongna Chen, Huiping Huang, Guodong Zhou|
🤖AI Summary

Researchers developed an automated query expansion framework using multiple large language models that constructs domain-specific examples without manual intervention. The system uses a two-LLM ensemble approach where different models generate expansions that are then refined by a third LLM, showing significant improvements over traditional methods across multiple datasets.

Key Takeaways
  • New automated framework eliminates need for hand-crafted prompts and manual exemplar selection in query expansion systems.
  • Two-LLM ensemble approach with refinement stage delivers statistically significant improvements over baseline methods.
  • System uses BM25-MonoT5 pipeline to automatically harvest domain-relevant passages for training examples.
  • Framework tested successfully across TREC DL20, DBPedia, and SciFact datasets showing consistent performance gains.
  • Training-free cluster-based strategy enables stable in-context query expansion without supervision requirements.
Read Original →via arXiv – CS AI
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