Ke Zhou

Enhancing Conversational Dialogue Models with Grounded Knowledge

2019

Leveraging external knowledge to enhance conversational models has become a popular research area in recent years. Compared to vanilla generative models, the knowledge-grounded models may produce more informative and engaging responses. Although various approaches have …

CAMS: A Cost-Aware Migration Scheme for Cloud Object Storage Systems

2024

Cloud object storage systems provide massive data storage capabilities where data is stored in different storage clusters. Storing data according to access characteristics efficiently in different clusters is a challenging task. Methods considering past data …

FAVOR: Efficient Filter-Agnostic Vector ANNS Based on Selectivity-Aware Exclusion Distances

2026 · Proceedings of the ACM on Management of Data

Modern retrieval systems increasingly require integrating approximate nearest neighbor search (ANNS) with complex attribute filtering to handle hybrid queries in applications such as recommendation systems and retrieval-augmented generation (RAG). While HNSW-based inline-filtering methods show promise, …