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Exploration, the act of broadening user experiences beyond their established preferences, is challenging in large-scale recommendation systems due to feedback loops and limited signals on user exploration patterns. Large Language Models…

As large language model (LLM)-based agents become increasingly integrated into daily digital interactions, their ability to reason across long interaction histories becomes crucial for providing personalized and contextually aware…

Machine Learning · Computer Science 2025-12-05 Andy Chung , Yichi Zhang , Kaixiang Lin , Aditya Rawal , Qiaozi Gao , Joyce Chai

Large Language Models (LLMs) have reshaped user profiling, yet current evaluations mainly focus on static data snapshots. This paradigm overlooks the reality of personalized systems, where User-Generated Content (UGC) arrives continuously…

Computation and Language · Computer Science 2026-05-27 Sizhe Wang , Feiyu Duan , Juelin Wang , Liwen Zhang , Zhongyu Wei

Personalized prompting offers large opportunities for deploying large language models (LLMs) to diverse users, yet existing prompt optimization methods primarily focus on task-level optimization while largely overlooking user-specific…

Machine Learning · Computer Science 2026-02-16 Yuchen Ma , Yue Huang , Wenjie Wang , Xiaonan Luo , Xiangliang Zhang , Stefan Feuerriegel

Accurately simulating human opinion dynamics is crucial for understanding a variety of societal phenomena, including polarization and the spread of misinformation. However, the agent-based models (ABMs) commonly used for such simulations…

Recommending cold items remains a significant challenge in billion-scale online recommendation systems. While warm items benefit from historical user behaviors, cold items rely solely on content features, limiting their recommendation…

Information Retrieval · Computer Science 2024-12-30 Feiran Huang , Yuanchen Bei , Zhenghang Yang , Junyi Jiang , Hao Chen , Qijie Shen , Senzhang Wang , Fakhri Karray , Philip S. Yu

Task-oriented conversational systems are essential for efficiently addressing diverse user needs, yet their development requires substantial amounts of high-quality conversational data that is challenging and costly to obtain. While large…

Information Retrieval · Computer Science 2025-11-06 Zhefan Wang , Ning Geng , Zhiqiang Guo , Weizhi Ma , Min Zhang

Large language models (LLMs) have shown remarkable success in recent years, enabling a wide range of applications, including intelligent assistants that support users' daily life and work. A critical factor in building such assistants is…

Computation and Language · Computer Science 2025-10-28 Xiaoyan Zhao , Ming Yan , Yilun Qiu , Haoting Ni , Yang Zhang , Fuli Feng , Hong Cheng , Tat-Seng Chua

Large language model-based agents are increasingly applied in the recommendation field due to their extensive knowledge and strong planning capabilities. While prior research has primarily focused on enhancing either the recommendation…

Information Retrieval · Computer Science 2025-05-05 Shihao Cai , Jizhi Zhang , Keqin Bao , Chongming Gao , Qifan Wang , Fuli Feng , Xiangnan He

Recent advances in Large Language Models (LLMs) have been changing the paradigm of Recommender Systems (RS). However, when items in the recommendation scenarios contain rich textual information, such as product descriptions in online…

Information Retrieval · Computer Science 2024-03-21 Zhi Zheng , Wenshuo Chao , Zhaopeng Qiu , Hengshu Zhu , Hui Xiong

Large Language Models (LLMs) have exhibited significant promise in recommender systems by empowering user profiles with their extensive world knowledge and superior reasoning capabilities. However, LLMs face challenges like unstable…

Recent advancements in explainable recommendation have greatly bolstered user experience by elucidating the decision-making rationale. However, the existing methods actually fail to provide effective feedback signals for potentially better…

Information Retrieval · Computer Science 2025-08-08 Jiakai Tang , Jingsen Zhang , Zihang Tian , Xueyang Feng , Lei Wang , Xu Chen

Large Language Models (LLMs) are increasingly deployed as autonomous agents capable of actions with real-world impacts beyond text generation. While persona-induced biases in text generation are well documented, their effects on agent task…

Computation and Language · Computer Science 2026-02-16 Linbo Cao , Lihao Sun , Yang Yue

LLM-based user agents, which simulate user interaction behavior, are emerging as a promising approach to enhancing recommender systems. In real-world scenarios, users' interactions often exhibit cross-domain characteristics and are…

Information Retrieval · Computer Science 2025-04-21 Jiahao Liu , Shengkang Gu , Dongsheng Li , Guangping Zhang , Mingzhe Han , Hansu Gu , Peng Zhang , Tun Lu , Li Shang , Ning Gu

Owing to powerful natural language processing and generative capabilities, large language model (LLM) agents have emerged as a promising solution for enhancing recommendation systems via user simulation. However, in the realm of video…

Multimedia · Computer Science 2025-07-04 Siran Chen , Boyu Chen , Chenyun Yu , Yuxiao Luo , Ouyang Yi , Lei Cheng , Chengxiang Zhuo , Zang Li , Yali Wang

To advance personalized applications such as recommendation systems and user behavior prediction, recent research increasingly adopts large language models (LLMs) for human -readable persona modeling. In dynamic real -world scenarios,…

Computation and Language · Computer Science 2025-07-17 Aili Chen , Chengyu Du , Jiangjie Chen , Jinghan Xu , Yikai Zhang , Siyu Yuan , Zulong Chen , Liangyue Li , Yanghua Xiao

The growing capabilities of large language models (LLMs) in instruction-following and context-understanding lead to the era of agents with numerous applications. Among these, task planning agents have become especially prominent in…

Designing high-performance system heuristics is a creative, iterative process requiring experts to form hypotheses and execute multi-step conceptual shifts. While Large Language Models (LLMs) show promise in automating this loop, they…

Artificial Intelligence · Computer Science 2026-03-24 Pantea Karimi , Kimia Noorbakhsh , Mohammad Alizadeh , Hari Balakrishnan

The emerging large language model role-playing agents (LLM RPAs) aim to simulate individual human behaviors, but the persona fidelity is often undermined by manually-created profiles (e.g., cherry-picked information and personality…

Computation and Language · Computer Science 2025-10-30 Bingsheng Yao , Bo Sun , Yuanzhe Dong , Yuxuan Lu , Dakuo Wang

Interactive recommender systems can dynamically adapt to user feedback, but often suffer from content homogeneity and filter bubble effects due to overfitting short-term user preferences. While recent efforts aim to improve content…

Information Retrieval · Computer Science 2026-05-12 Chongjun Xia , Yanchun Peng , Xianzhi Wang