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Recommender systems have achieved great success in modeling user's preferences on items and predicting the next item the user would consume. Recently, there have been many efforts to utilize time information of users' interactions with…

Information Retrieval · Computer Science 2021-04-30 Junsu Cho , Dongmin Hyun , SeongKu Kang , Hwanjo Yu

In e-commerce, LLM agents show promise for shopping tasks such as recommendations, budget management, and bundle deals, where accurately capturing user preferences from long-horizon conversations is critical. However, progress is limited by…

Computation and Language · Computer Science 2026-05-28 Zijian Yu , Kejun Xiao , Huaipeng Zhao , Tao Luo , Xiaoyi Zeng

Large-language Models (LLMs) have been extremely successful at tasks like complex dialogue understanding, reasoning and coding due to their emergent abilities. These emergent abilities have been extended with multi-modality to include…

Information Retrieval · Computer Science 2025-05-19 Li Yang , Anushya Subbiah , Hardik Patel , Judith Yue Li , Yanwei Song , Reza Mirghaderi , Vikram Aggarwal , Qifan Wang

Recommender systems support decisions in various domains ranging from simple items such as books and movies to more complex items such as financial services, telecommunication equipment, and software systems. In this context,…

Information Retrieval · Computer Science 2021-02-15 Alexander Felfernig , Viet-Man Le , Andrei Popescu , Mathias Uta , Thi Ngoc Trang Tran , Müslüum Atas

Sequential recommendation, a critical task in recommendation systems, predicts the next user action based on the understanding of the user's historical behaviors. Conventional studies mainly focus on cross-behavior modeling with…

Information Retrieval · Computer Science 2025-06-23 Zhen Gong , Zhifang Fan , Hui Lu , Qiwei Chen , Chenbin Zhang , Lin Guan , Yuchao Zheng , Feng Zhang , Xiao Yang , Zuotao Liu

Item-to-Item (I2I) recommendation models are widely used in real-world systems due to their scalability, real-time capabilities, and high recommendation quality. Research to enhance I2I performance focuses on two directions: 1)…

Information Retrieval · Computer Science 2025-12-29 Yinfu Feng , Yanjing Wu , Rong Xiao , Xiaoyi Zen

In domains where users tend to develop long-term preferences that do not change too frequently, the stability of recommendations is an important factor of the perceived quality of a recommender system. In such cases, unstable…

Information Retrieval · Computer Science 2021-04-13 Oluwafemi Olaleke , Ivan Oseledets , Evgeny Frolov

Industrial recommendation systems are typically composed of multiple stages, including retrieval, ranking, and blending. The retrieval stage plays a critical role in generating a high-recall set of candidate items that covers a wide range…

Information Retrieval · Computer Science 2025-07-01 Zhibo Fan , Hongtao Lin , Haoyu Chen , Bowen Deng , Hedi Xia , Yuke Yan , James Li

Inspired by the exceptional general intelligence of Large Language Models (LLMs), researchers have begun to explore their application in pioneering the next generation of recommender systems - systems that are conversational, explainable,…

Information Retrieval · Computer Science 2024-08-06 Wensheng Lu , Jianxun Lian , Wei Zhang , Guanghua Li , Mingyang Zhou , Hao Liao , Xing Xie

Although a variety of methods have been proposed for sequential recommendation, it is still far from being well solved partly due to two challenges. First, the existing methods often lack the simultaneous consideration of the global…

Information Retrieval · Computer Science 2022-08-10 Lihua Chen , Ning Yang , Philip S Yu

We analyze the unintended effects that recommender systems have on the preferences of users that they are learning. We consider a contextual multi-armed bandit recommendation algorithm that learns optimal product recommendations based on…

Machine Learning · Computer Science 2026-02-11 Prabhat Lankireddy , Jayakrishnan Nair , D Manjunath

This paper explores the use of Large Language Models (LLMs) for sequential recommendation, which predicts users' future interactions based on their past behavior. We introduce a new concept, "Integrating Recommendation Systems as a New…

Information Retrieval · Computer Science 2024-12-24 Kai Zheng , Qingfeng Sun , Can Xu , Peng Yu , Qingwei Guo

Recommendation systems can provide accurate recommendations by analyzing user shopping history. A richer user history results in more accurate recommendations. However, in real applications, users prefer e-commerce platforms where the item…

Information Retrieval · Computer Science 2024-03-20 Irem Islek , Sule Gunduz Oguducu

The contextual duelling bandit problem models adaptive recommender systems, where the algorithm presents a set of items to the user, and the user's choice reveals their preference. This setup is well suited for implicit choices users make…

Machine Learning · Computer Science 2025-08-27 Suryanarayana Sankagiri , Jalal Etesami , Pouria Fatemi , Matthias Grossglauser

Actively inferring user preferences, for example by asking good questions, is important for any human-facing decision-making system. Active inference allows such systems to adapt and personalize themselves to nuanced individual preferences.…

Computation and Language · Computer Science 2024-06-27 Wasu Top Piriyakulkij , Volodymyr Kuleshov , Kevin Ellis

User Behavior Modeling (UBM) plays a critical role in user interest learning, which has been extensively used in recommender systems. Crucial interactive patterns between users and items have been exploited, which brings compelling…

Information Retrieval · Computer Science 2023-02-23 Zhicheng He , Weiwen Liu , Wei Guo , Jiarui Qin , Yingxue Zhang , Yaochen Hu , Ruiming Tang

Large Language Models (LLMs) have shown strong potential in generating natural language explanations for recommender systems. However, existing methods often overlook the sequential dynamics of user behavior and rely on evaluation metrics…

Information Retrieval · Computer Science 2026-03-26 Gangyi Zhang , Runzhe Teng , Chongming Gao

Accurate prediction of users' responses to items is one of the main aims of many computational advising applications. Examples include recommending movies, news articles, songs, jobs, clothes, books and so forth. Accurate prediction of…

Applications · Statistics 2022-12-20 Baode Gao , Guangpeng Zhan , Hanzhang Wang , Yiming Wang , Shengxin Zhu

Many existing industrial recommender systems are sensitive to the patterns of user-item engagement. Light users, who interact less frequently, correspond to a data sparsity problem, making it difficult for the system to accurately learn and…

Information Retrieval · Computer Science 2024-08-08 Hanjia Lyu , Hanqing Zeng , Yinglong Xia , Ren Chen , Jiebo Luo

Nowadays, recommender systems and search engines play an integral role in fashion e-commerce. Still, many challenges lie ahead, and this study tries to tackle some. This article first suggests a content-based fashion recommender system that…

Information Retrieval · Computer Science 2022-07-26 Seyed Omid Mohammadi , Hossein Bodaghi , Ahmad Kalhor