activity
20232026
collaborators

6 papers

cs.AI2026

Extracting Algorithms in Pre-trained LLMs: A Case on Hidden Markov Models

Yijia Dai, Zhaolin Gao, Yahya Sattar +2

Large language models (LLMs) display a striking ability to predict next observations from Hidden Markov Models (HMMs) via in-context learning (ICL), but the algorithm underlying th…

cs.LG2025

Pre-trained Large Language Models Learn Hidden Markov Models In-context

Yijia Dai, Zhaolin Gao, Yahya Sattar +2

Hidden Markov Models (HMMs) are foundational tools for modeling sequential data with latent Markovian structure, yet fitting them to real-world data remains computationally challen…

cs.IR2024

End-to-end Training for Recommendation with Language-based User Profiles

Zhaolin Gao, Joyce Zhou, Yijia Dai +1

There is a growing interest in natural language-based user profiles for recommender systems, which aims to enhance transparency and scrutability compared with embedding-based metho…

cs.CL2024

Language-Based User Profiles for Recommendation

Joyce Zhou, Yijia Dai, Thorsten Joachims

Most conventional recommendation methods (e.g., matrix factorization) represent user profiles as high-dimensional vectors. Unfortunately, these vectors lack interpretability and st…

cs.LG2023

Sample Efficient Preference Alignment in LLMs via Active Exploration

Viraj Mehta, Syrine Belakaria, Vikramjeet Das +7

Preference-based feedback is important for many applications in machine learning where evaluation of a reward function is not feasible. Notable recent examples arise in preference…

cs.IR2023

Representation Learning in Low-rank Slate-based Recommender Systems

Yijia Dai, Wen Sun

Reinforcement learning (RL) in recommendation systems offers the potential to optimize recommendations for long-term user engagement. However, the environment often involves large…