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Recommender systems are one of the most successful applications of machine learning and data science. They are successful in a wide variety of application domains, including e-commerce, media streaming content, email marketing, and…

Information Retrieval · Computer Science 2023-04-04 Juan Pablo Equihua , Maged Ali , Henrik Nordmark , Berthold Lausen

The recommender system is one of the most promising ways to address the information overload problem in online systems. Based on the personal historical record, the recommender system can find interesting and relevant objects for the user…

Information Retrieval · Computer Science 2015-06-17 An Zeng , Alexandre Vidmer , Matus Medo , Yi-Cheng Zhang

Matrix factorization models are the core of current commercial collaborative filtering Recommender Systems. This paper tested six representative matrix factorization models, using four collaborative filtering datasets. Experiments have…

Information Retrieval · Computer Science 2024-10-28 Jesús Bobadilla , Jorge Dueñas-Lerín , Fernando Ortega , Abraham Gutierrez

Traditional Collaborative Filtering (CF) based methods are applied to understand the personal preferences of users/customers for items or products from the rating matrix. Usually, the rating matrix is sparse in nature. So there are some…

Information Retrieval · Computer Science 2022-10-12 Supriyo Mandal , Abyayananda Maiti

This work explores the ability of collective matrix factorization models in recommender systems to make predictions about users and items for which there is side information available but no feedback or interactions data, and proposes a new…

Information Retrieval · Computer Science 2020-03-17 David Cortes

Recommending new items to existing users has remained a challenging problem due to absence of user's past preferences for these items. The user personalized non-collaborative methods based on item features can be used to address this item…

Information Retrieval · Computer Science 2019-04-29 Mohit Sharma , Jiayu Zhou , Junling Hu , George Karypis

In recommender systems, modeling user-item behaviors is essential for user representation learning. Existing sequential recommenders consider the sequential correlations between historically interacted items for capturing users' historical…

Information Retrieval · Computer Science 2021-05-04 Yujie Lu , Shengyu Zhang , Yingxuan Huang , Luyao Wang , Xinyao Yu , Zhou Zhao , Fei Wu

Recently, malevolent user hacking has become a huge problem for real-world companies. In order to learn predictive models for recommender systems, factorization techniques have been developed to deal with user-item ratings. In this paper,…

Information Retrieval · Computer Science 2022-11-08 Li Wang , Qiang Zhao , Wei Wang

Sequential recommendation predicts each user's next item based on their historical interaction sequence. Recently, diffusion models have attracted significant attention in this area due to their strong ability to model user interest…

Information Retrieval · Computer Science 2025-08-26 Li Li , Mingyue Cheng , Yuyang Ye , Zhiding Liu , Enhong Chen

Recommender systems (RSs) provide an effective way of alleviating the information overload problem by selecting personalized choices. Online social networks and user-generated content provide diverse sources for recommendation beyond…

Information Retrieval · Computer Science 2020-10-19 Guang-Neng Hu , Xin-Yu Dai , Yunya Song , Shu-Jian Huang , Jia-Jun Chen

Modeling the sequential correlation of users' historical interactions is essential in sequential recommendation. However, the majority of the approaches mainly focus on modeling the \emph{intra-sequence} item correlation within each…

Information Retrieval · Computer Science 2020-04-30 Feng Liu , Weiwen Liu , Xutao Li , Yunming Ye

Sequential patterns play an important role in building modern recommender systems. To this end, several recommender systems have been built on top of Markov Chains and Recurrent Models (among others). Although these sequential models have…

Information Retrieval · Computer Science 2019-08-28 An Yan , Shuo Cheng , Wang-Cheng Kang , Mengting Wan , Julian McAuley

Capturing the dynamics in user preference is crucial to better predict user future behaviors because user preferences often drift over time. Many existing recommendation algorithms -- including both shallow and deep ones -- often model such…

Information Retrieval · Computer Science 2022-04-05 Chao Chen , Dongsheng Li , Junchi Yan , Xiaokang Yang

Matrix factorization is a widely adopted recommender system technique that fits scalar rating values by dot products of user feature vectors and item feature vectors. However, the formulation of matrix factorization as a scalar fitting…

Information Retrieval · Computer Science 2021-12-07 Hao Wang

Sequential dynamics are a key feature of many modern recommender systems, which seek to capture the `context' of users' activities on the basis of actions they have performed recently. To capture such patterns, two approaches have…

Information Retrieval · Computer Science 2018-08-30 Wang-Cheng Kang , Julian McAuley

Model-based collaborative filtering analyzes user-item interactions to infer latent factors that represent user preferences and item characteristics in order to predict future interactions. Most collaborative filtering algorithms assume…

Machine Learning · Computer Science 2016-11-02 Ghassen Jerfel , Mehmet E. Basbug , Barbara E. Engelhardt

Markov models have been widely used to represent and analyse user web navigation data. In previous work we have proposed a method to dynamically extend the order of a Markov chain model and a complimentary method for assessing the…

Artificial Intelligence · Computer Science 2007-05-23 Jose Borges , Mark Levene

We propose a novel recommender framework, MuSTRec (Multimodal and Sequential Transformer-based Recommendation), that unifies multimodal and sequential recommendation paradigms. MuSTRec captures cross-item similarities and collaborative…

Information Retrieval · Computer Science 2026-02-10 Bucher Sahyouni , Matthew Vowels , Liqun Chen , Simon Hadfield

Recent methods in sequential recommendation focus on learning an overall embedding vector from a user's behavior sequence for the next-item recommendation. However, from empirical analysis, we discovered that a user's behavior sequence…

Information Retrieval · Computer Science 2021-02-19 Qiaoyu Tan , Jianwei Zhang , Jiangchao Yao , Ninghao Liu , Jingren Zhou , Hongxia Yang , Xia Hu

As industrial recommender systems enter a scaling-driven regime, Transformer architectures have become increasingly attractive for scaling models towards larger capacity and longer sequence. However, existing Transformer-based…

Information Retrieval · Computer Science 2026-02-17 Xu Huang , Hao Zhang , Zhifang Fan , Yunwen Huang , Zhuoxing Wei , Zheng Chai , Jinan Ni , Yuchao Zheng , Qiwei Chen