collaborators

10 papers

cs.IR2026

E-GEO: A Testbed for Generative Engine Optimization in E-Commerce

Puneet S. Bagga, Vivek F. Farias, Tamar Korkotashvili +2

The paper presents E-GEO, a new dataset for studying generative engine optimization (GEO) in e‑commerce, and proposes a lightweight prompt meta‑optimization method that improves co…

cs.CL2026

Optimizing RAG Rerankers with LLM Feedback via Reinforcement Learning

Yuhang Wu, Xiangqing Shen, Fanfan Wang +4

Rerankers play a pivotal role in refining retrieval results for Retrieval-Augmented Generation. However, current reranking models are typically optimized on static human annotated…

stat.ML2026

Adaptive Querying with AI Persona Priors

Kaizheng Wang, Yuhang Wu, Assaf Zeevi

We study adaptive querying for learning user-dependent quantities of interest, such as responses to held-out items and psychometric indicators, within tight query budgets. Classica…

cs.CL2026

Training-Free Multimodal Large Language Model Orchestration

Tianyu Xie, Yuexiao Ma, Yuhang Wu +5

Building interactive omni-modal assistants often relies on end-to-end multimodal alignment to fuse heterogeneous modalities, which incurs substantial data and compute costs and lim…

cs.CL2026

Learning from Medical Entity Trees: An Entity-Centric Medical Data Engineering Framework for MLLMs

Jianghang Lin, Haihua Yang, Deli Yu +6

Multimodal Large Language Models (MLLMs) have shown transformative potential in medical applications, yet their performance is hindered by conventional data curation strategies tha…

cs.LG2026

SYN-DIGITS: A Synthetic Control Framework for Calibrated Digital Twin Simulation

Grace Jiarui Fan, Chengpiao Huang, Tianyi Peng +2

AI-based persona simulation -- often referred to as digital twin simulation -- is increasingly used for market research, recommender systems, and social sciences. Despite their fle…