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Recommender systems are crucial for personalizing user experiences but often depend on implicit feedback data, which can be noisy and misleading. Existing denoising studies involve incorporating auxiliary information or learning strategies…

Information Retrieval · Computer Science 2025-02-14 Shuyao Wang , Zhi Zheng , Yongduo Sui , Hui Xiong

The growth of recommender systems (RecSys) is driven by digitization and the need for personalized content in areas such as e-commerce and video streaming. The content in these systems often changes rapidly and therefore they constantly…

Information Retrieval · Computer Science 2024-11-15 Shiyu Wang , Hao Ding , Yupeng Gu , Sergul Aydore , Kousha Kalantari , Branislav Kveton

Sequential recommendation aims to predict users' future interactions by modeling collaborative filtering (CF) signals from historical behaviors of similar users or items. Traditional sequential recommenders predominantly rely on ID-based…

Information Retrieval · Computer Science 2025-06-30 Yingzhi He , Xiaohao Liu , An Zhang , Yunshan Ma , Tat-Seng Chua

Recently, large language models (LLMs) have been widely used as recommender systems, owing to their reasoning capability and effectiveness in handling cold-start items. A common approach prompts an LLM with a target user's purchase history…

Information Retrieval · Computer Science 2026-04-23 Sunwoo Kim , Geon Lee , Kyungho Kim , Jaemin Yoo , Kijung Shin

Large language models (LLMs) are increasingly leveraged as foundational backbones in the development of advanced recommender systems, offering enhanced capabilities through their extensive knowledge and reasoning. Existing llm-based…

Information Retrieval · Computer Science 2025-02-21 Minjie Hong , Yan Xia , Zehan Wang , Jieming Zhu , Ye Wang , Sihang Cai , Xiaoda Yang , Quanyu Dai , Zhenhua Dong , Zhimeng Zhang , Zhou Zhao

Large language models (LLMs) open up new horizons for sequential recommendations, owing to their remarkable language comprehension and generation capabilities. However, there are still numerous challenges that should be addressed to…

Information Retrieval · Computer Science 2024-03-29 Yuling Wang , Changxin Tian , Binbin Hu , Yanhua Yu , Ziqi Liu , Zhiqiang Zhang , Jun Zhou , Liang Pang , Xiao Wang

Current interactive systems with natural language interfaces lack the ability to understand a complex information-seeking request which expresses several implicit constraints at once, and there is no prior information about user preferences…

A long-standing challenge in developing accurate recommendation models is simulating user behavior, mainly due to the complex and stochastic nature of user interactions. Towards this, one promising line of work has been the use of Large…

Information Retrieval · Computer Science 2025-09-15 Himanshu Thakur , Eshani Agrawal , Smruthi Mukund

Recommender systems usually rely on large-scale interaction data to learn from users' past behaviors and make accurate predictions. However, real-world applications often face situations where no training data is available, such as when…

Information Retrieval · Computer Science 2025-12-16 Genki Kusano , Kenya Abe , Kunihiro Takeoka

Recommender systems have become integral to our digital experiences, from online shopping to streaming platforms. Still, the rationale behind their suggestions often remains opaque to users. While some systems employ a graph-based approach,…

A Conversational Recommender System (CRS) offers increased transparency and control to users by enabling them to engage with the system through a real-time multi-turn dialogue. Recently, Large Language Models (LLMs) have exhibited an…

Recommender systems (RS) have become essential tools for helping users efficiently navigate the overwhelming amount of information on e-commerce and social platforms. However, traditional RS relying on Collaborative Filtering (CF) struggles…

Information Retrieval · Computer Science 2025-02-27 Mingdai Yang , Zhiwei Liu , Liangwei Yang , Xiaolong Liu , Chen Wang , Hao Peng , Philip S. Yu

This study deeply explores the application of large language model (LLM) in personalized recommendation system of e-commerce. Aiming at the limitations of traditional recommendation algorithms in processing large-scale and multi-dimensional…

Information Retrieval · Computer Science 2024-10-18 Wei Xu , Jue Xiao , Jianlong Chen

Sequential recommendation is to predict the next item of interest for a user, based on her/his interaction history with previous items. In conventional sequential recommenders, a common approach is to model item sequences using discrete…

Information Retrieval · Computer Science 2023-11-01 Zhengyi Yang , Jiancan Wu , Yanchen Luo , Jizhi Zhang , Yancheng Yuan , An Zhang , Xiang Wang , Xiangnan He

Personalized content-based recommender systems have become indispensable tools for users to navigate through the vast amount of content available on platforms like daily news websites and book recommendation services. However, existing…

Information Retrieval · Computer Science 2023-09-01 Qijiong Liu , Nuo Chen , Tetsuya Sakai , Xiao-Ming Wu

Contemporary recommendation systems predominantly rely on ID embedding to capture latent associations among users and items. However, this approach overlooks the wealth of semantic information embedded within textual descriptions of items,…

Information Retrieval · Computer Science 2024-12-30 Jian Jia , Yipei Wang , Yan Li , Honggang Chen , Xuehan Bai , Zhaocheng Liu , Jian Liang , Quan Chen , Han Li , Peng Jiang , Kun Gai

Integrating product catalogs and user behavior into LLMs can enhance recommendations with broad world knowledge, but the scale of real-world item catalogs, often containing millions of discrete item identifiers (Item IDs), poses a…

Information Retrieval · Computer Science 2025-09-05 Anushya Subbiah , Vikram Aggarwal , James Pine , Steffen Rendle , Krishna Sayana , Kun Su

Accurate estimates of item difficulty are essential for valid assessment and effective adaptive learning. However, for newly created tasks, response data are typically unavailable. Pretesting and expert judgement can be costly and slow,…

Large Language Models (LLMs) have recently emerged as promising tools for recommendation thanks to their advanced textual understanding ability and context-awareness. Despite the current practice of training and evaluating LLM-based…

Information Retrieval · Computer Science 2025-06-12 Sein Kim , Hongseok Kang , Kibum Kim , Jiwan Kim , Donghyun Kim , Minchul Yang , Kwangjin Oh , Julian McAuley , Chanyoung Park

With the advent of the information explosion era, the importance of recommendation systems in various applications is increasingly significant. Traditional collaborative filtering algorithms are widely used due to their effectiveness in…

Artificial Intelligence · Computer Science 2024-12-30 Xueting Lin , Zhan Cheng , Longfei Yun , Qingyi Lu , Yuanshuai Luo