A lightweight quality gate identifies coverage gaps in initial keyword results, adaptively routing only the ∼ 10% of users who benefit from semantic prospecting to the LLM path, and captures the bulk of semantic prospecting gains in Relevance Score while maintaining competitive retargeting performance at a 90% reductio...
Cong-Fei Zhang, J. Ma, Xiao-Dong Liu et al.· Proceedings of the 20th ACM...· 0 citations
Deployed as a new retrieval source in the DPA production stack, SetMIR lifts overall CVR by 3.1%, while lifting CTR by 44% and CVR by 51% over the item-to-item retrieval source with the same item embeddings, ANN index, and retrieval quota.
Xiao-Dong Liu, Cong-Fei Zhang, Hsiang-Wei Chao et al.· 0 citations
EGR is proposed, an Embedding-Native Generative Retrieval framework that uses a single shared LLM to learn item representations from item metadata and user representations from interaction histories in one embedding space, simplifying system design while improving retrieval quality and ad performance.
