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The past few years have witnessed the great success of recommender systems, which can significantly help users find out personalized items for them from the information era. One of the most widely applied recommendation methods is the…

Information Retrieval · Computer Science 2015-06-17 Chu-Xu Zhang , Zi-Ke Zhang , Lu Yu , Chuang Liu , Hao Liu , Xiao-Yong Yan

Recommender systems shape online interactions by matching users with creators content to maximize engagement. Creators, in turn, adapt their content to align with users preferences and enhance their popularity. At the same time, users…

Information Retrieval · Computer Science 2026-01-07 Lukas Schüepp , Carmen Amo Alonso , Florian Dörfler , Giulia De Pasquale

In recent years, neural networks and other complex models have dominated recommender systems, often setting new benchmarks for state-of-the-art performance. Yet, despite these advancements, award-winning research has demonstrated that…

Information Retrieval · Computer Science 2026-04-20 Pedro R. Pires , Rafael T. Sereicikas , Gregorio F. Azevedo , Tiago A. Almeida

Semantically connecting users and items is a fundamental problem for the matching stage of an industrial recommender system. Recent advances in this topic are based on multi-channel retrieval to efficiently measure users' interest on items…

Information Retrieval · Computer Science 2022-02-15 Yujie Lu , Ping Nie , Shengyu Zhang , Ming Zhao , Ruobing Xie , William Yang Wang , Yi Ren

Popularity is often included in experimental evaluation to provide a reference performance for a recommendation task. To understand how popularity baseline is defined and evaluated, we sample 12 papers from top-tier conferences including…

Information Retrieval · Computer Science 2020-06-03 Yitong Ji , Aixin Sun , Jie Zhang , Chenliang Li

Current item-item collaborative filtering algorithms based on artificial neural network, such as Item2vec, have become ubiquitous and are widely applied in the modern recommender system. However, these approaches do not apply to the…

Information Retrieval · Computer Science 2023-10-24 Ruilin Yuan , Leya Li , Yuanzhe Cai

We develop a Bayesian Poisson matrix factorization model for forming recommendations from sparse user behavior data. These data are large user/item matrices where each user has provided feedback on only a small subset of items, either…

Information Retrieval · Computer Science 2014-05-21 Prem Gopalan , Jake M. Hofman , David M. Blei

Recommenders built upon implicit collaborative filtering are typically trained to distinguish between users' positive and negative preferences. When direct observations of the latter are unavailable, negative training data are constructed…

Information Retrieval · Computer Science 2026-01-28 Yueqing Xuan , Kacper Sokol , Mark Sanderson , Jeffrey Chan

The challenges associated with large-scale user-item interaction graphs have attracted increasing attention in graph-based recommendation systems, primarily due to computational inefficiencies and inadequate information propagation.…

Information Retrieval · Computer Science 2025-11-25 Jiahao Liang , Haoran Yang , Xiangyu Zhao , Zhiwen Yu , Guandong Xu , Wanyu Wang , Kaixiang Yang

In the world of big data, many people find it difficult to access the information they need quickly and accurately. In order to overcome this, research on the system that recommends information accurately to users is continuously conducted.…

Computers and Society · Computer Science 2019-09-19 Keum Gang Cha , Soo-Ryeon Lee , Jung-Woo Lee , Seung Bin Baik

In this paper, we propose a robust sequential learning strategy for training large-scale Recommender Systems (RS) over implicit feedback mainly in the form of clicks. Our approach relies on the minimization of a pairwise ranking loss over…

Information Retrieval · Computer Science 2021-09-15 Alexandra Burashnikova , Yury Maximov , Massih-Reza Amini

Learning a good representation of text is key to many recommendation applications. Examples include news recommendation where texts to be recommended are constantly published everyday. However, most existing recommendation techniques, such…

Information Retrieval · Computer Science 2017-06-27 Ting Chen , Liangjie Hong , Yue Shi , Yizhou Sun

Interactive recommender system (IRS) has drawn huge attention because of its flexible recommendation strategy and the consideration of optimal long-term user experiences. To deal with the dynamic user preference and optimize accumulative…

Information Retrieval · Computer Science 2020-06-19 Sijin Zhou , Xinyi Dai , Haokun Chen , Weinan Zhang , Kan Ren , Ruiming Tang , Xiuqiang He , Yong Yu

Collaborative information from user-item interactions is a fundamental source of signal in successful recommender systems. Recently, researchers have attempted to incorporate this knowledge into large language model-based recommender…

Information Retrieval · Computer Science 2026-03-24 Shahrooz Pouryousef , Ali Montazeralghaem

Collaborative filtering is an important technique for recommendation. Whereas it has been repeatedly shown to be effective in previous work, its performance remains unsatisfactory in many real-world applications, especially those where the…

Information Retrieval · Computer Science 2018-08-15 Zhiyu Min , Dahua Lin

With over 500 million tweets posted per day, in Twitter, it is difficult for Twitter users to discover interesting content from the deluge of uninteresting posts. In this work, we present a novel, explainable, topical recommendation system,…

Information Retrieval · Computer Science 2022-12-29 Parantapa Bhattacharya , Saptarshi Ghosh , Muhammad Bilal Zafar , Soumya K. Ghosh , Niloy Ganguly

Sequential recommendation refers to recommending the next item of interest for a specific user based on his/her historical behavior sequence up to a certain time. While previous research has extensively examined Markov chain-based…

Information Retrieval · Computer Science 2025-01-06 DongYu Du , Yue Chan

Recommender system exists everywhere in the business world. From Goodreads to TikTok, customers of internet products become more addicted to the products thanks to the technology. Industrial practitioners focus on increasing the technical…

Information Retrieval · Computer Science 2023-03-03 Hao Wang

Inspired by the legacy of the Netflix contest, we provide an overview of what has been learned---from our own efforts, and those of others---concerning the problems of collaborative filtering and recommender systems. The data set consists…

Methodology · Statistics 2012-07-25 Andrey Feuerverger , Yu He , Shashi Khatri

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