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Existing item-based collaborative filtering (ICF) methods leverage only the relation of collaborative similarity. Nevertheless, there exist multiple relations between items in real-world scenarios. Distinct from the collaborative similarity…

Information Retrieval · Computer Science 2019-05-14 Xin Xin , Xiangnan He , Yongfeng Zhang , Yongdong Zhang , Joemon Jose

Large Language Models (LLMs) have emerged as a promising paradigm for next-generation recommender systems, offering strong semantic understanding and natural-language reasoning abilities. Despite recent progress, current LLM-based…

Information Retrieval · Computer Science 2026-05-11 Shijun Li , Wooseong Yang , Yu Wang , Tianxin Wei , Joydeep Ghosh

Generative large language models(LLMs) are proficient in solving general problems but often struggle to handle domain-specific tasks. This is because most of domain-specific tasks, such as personalized recommendation, rely on task-related…

Information Retrieval · Computer Science 2023-11-08 Wenxuan Zhang , Hongzhi Liu , Yingpeng Du , Chen Zhu , Yang Song , Hengshu Zhu , Zhonghai Wu

Large language models (LLMs) as autonomous agents offer a novel avenue for tackling real-world challenges through a knowledge-driven manner. These LLM-enhanced methodologies excel in generalization and interpretability. However, the…

Artificial Intelligence · Computer Science 2024-07-22 Kemou Jiang , Xuan Cai , Zhiyong Cui , Aoyong Li , Yilong Ren , Haiyang Yu , Hao Yang , Daocheng Fu , Licheng Wen , Pinlong Cai

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

Large Language Models (LLMs) have shown great potential for enhancing recommender systems through their extensive world knowledge and reasoning capabilities. However, effectively translating these semantic signals into traditional…

Information Retrieval · Computer Science 2026-02-25 Junjie Meng , Ranxu zhang , Wei Wu , Rui Zhang , Chuan Qin , Qi Zhang , Qi Liu , Hui Xiong , Chao Wang

Recommender systems in concert with Large Language Models (LLMs) present promising avenues for generating semantically-informed recommendations. However, LLM-based recommenders exhibit a tendency to overemphasize semantic correlations…

Computation and Language · Computer Science 2025-08-15 Minhao Wang , Yunhang He , Cong Xu , Zhangchi Zhu , Wei Zhang

To leverage user behavior data from the Internet more effectively in recommender systems, this paper proposes a novel collaborative filtering (CF) method called Local Collaborative Filtering (LCF). LCF utilizes local similarities among…

Information Retrieval · Computer Science 2025-11-18 Zhaoxin Shen , Dan Wu

Large Language Models (LLMs) have become powerful foundations for generative recommender systems, framing recommendation tasks as text generation tasks. However, existing generative recommendation methods often rely on discrete ID-based…

Information Retrieval · Computer Science 2026-03-24 Jerome Ramos , Bin Wu , Aldo Lipani

Collaborative filtering often suffers from sparsity and cold start problems in real recommendation scenarios, therefore, researchers and engineers usually use side information to address the issues and improve the performance of recommender…

Information Retrieval · Computer Science 2019-01-28 Hongwei Wang , Fuzheng Zhang , Miao Zhao , Wenjie Li , Xing Xie , Minyi Guo

Personalized recommendation is ubiquitous, playing an important role in many online services. Substantial research has been dedicated to learning vector representations of users and items with the goal of predicting a user's preference for…

Information Retrieval · Computer Science 2020-01-03 Jianing Sun , Yingxue Zhang , Chen Ma , Mark Coates , Huifeng Guo , Ruiming Tang , Xiuqiang He

Recently, there has been an emergence of employing LLM-powered agents as believable human proxies, based on their remarkable decision-making capability. However, existing studies mainly focus on simulating human dialogue. Human non-verbal…

Information Retrieval · Computer Science 2023-10-16 Junjie Zhang , Yupeng Hou , Ruobing Xie , Wenqi Sun , Julian McAuley , Wayne Xin Zhao , Leyu Lin , Ji-Rong Wen

Recent advancements in tool learning have enabled large language models (LLMs) to integrate external tools, enhancing their task performance by expanding their knowledge boundaries. However, relying on tools often introduces tradeoffs…

Computation and Language · Computer Science 2025-03-11 Hongshen Xu , Zihan Wang , Zichen Zhu , Lei Pan , Xingyu Chen , Lu Chen , Kai Yu

In recent years, there has been growing interest in leveraging the impressive generalization capabilities and reasoning ability of large language models (LLMs) to improve the performance of recommenders. With this operation, recommenders…

Information Retrieval · Computer Science 2025-08-12 Guanchen Wang , Mingming Ha , Tianbao Ma , Linxun Chen , Zhaojie Liu , Guorui Zhou , Kun Gai

Explainable recommender systems are designed to elucidate the explanation behind each recommendation, enabling users to comprehend the underlying logic. Previous works perform rating prediction and explanation generation in a multi-task…

Information Retrieval · Computer Science 2025-04-09 Shijie Liu , Ruixing Ding , Weihai Lu , Jun Wang , Mo Yu , Xiaoming Shi , Wei Zhang

While personalized recommender systems excel at content discovery, they frequently expose users to undesirable or discomforting information, highlighting the critical need for user-centric filtering tools. Current methods leveraging Large…

Information Retrieval · Computer Science 2026-04-21 Chi Zhang , Zhipeng Xu , Jiahao Liu , Dongsheng Li , Hansu Gu , Peng Zhang , Ning Gu , Tun Lu

Explainable recommendations help improve the transparency and credibility of recommendation systems, and play an important role in personalized recommendation scenarios. At present, methods for explainable recommendation based on large…

Information Retrieval · Computer Science 2026-04-07 Xiangchen Pan , Wei Wei

Generative models have shown great promise in collaborative filtering by capturing the underlying distribution of user interests and preferences. However, existing approaches struggle with inaccurate posterior approximations and…

Information Retrieval · Computer Science 2025-09-08 Chengkai Liu , Yangtian Zhang , Jianling Wang , Rex Ying , James Caverlee

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

Collaborative Filtering (CF) has become the standard approach to solve recommendation systems (RS) problems. Collaborative Filtering algorithms try to make predictions about interests of a user by collecting the personal interests from…

Information Retrieval · Computer Science 2021-03-11 Tomas Sousa-Pereira , Tiago Cunha , Carlos Soares