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Recommender systems play a crucial role in mitigating the problem of information overload by suggesting users' personalized items or services. The vast majority of traditional recommender systems consider the recommendation procedure as a…

Information Retrieval · Computer Science 2018-08-13 Xiangyu Zhao , Liang Zhang , Zhuoye Ding , Long Xia , Jiliang Tang , Dawei Yin

Why does Deep Learning work? What representations does it capture? How do higher-order representations emerge? We study these questions from the perspective of group theory, thereby opening a new approach towards a theory of Deep learning.…

Machine Learning · Computer Science 2015-04-22 Arnab Paul , Suresh Venkatasubramanian

The lack of bias management in Recommender Systems leads to minority groups receiving unfair recommendations. Moreover, the trade-off between equity and precision makes it difficult to obtain recommendations that meet both criteria. Here we…

Machine Learning · Computer Science 2020-12-22 Jesús Bobadilla , Raúl Lara-Cabrera , Ángel González-Prieto , Fernando Ortega

Precise user and item embedding learning is the key to building a successful recommender system. Traditionally, Collaborative Filtering(CF) provides a way to learn user and item embeddings from the user-item interaction history. However,…

Information Retrieval · Computer Science 2019-04-24 Le Wu , Peijie Sun , Yanjie Fu , Richang Hong , Xiting Wang , Meng Wang

In the field of group recommendation systems (GRS), effectively addressing the diverse preferences of group members poses a significant challenge. Traditional GRS approaches often aggregate individual preferences into a collective group…

Information Retrieval · Computer Science 2025-03-18 Peijin Yu , Shin'ichi Konomi

Recommender system has been deployed in a large amount of real-world applications, profoundly influencing people's daily life and production.Traditional recommender models mostly collect as comprehensive as possible user behaviors for…

Information Retrieval · Computer Science 2022-11-03 Lei Wang , Xu Chen , Quanyu Dai , Zhenhua Dong

The abundance of information in web applications make recommendation essential for users as well as applications. Despite the effectiveness of existing recommender systems, we find two major limitations that reduce their overall…

Information Retrieval · Computer Science 2020-09-01 Dilruk Perera , Roger Zimmermann

The recent development of online recommender systems has a focus on collaborative ranking from implicit feedback, such as user clicks and purchases. Different from explicit ratings, which reflect graded user preferences, the implicit…

Information Retrieval · Computer Science 2020-02-25 Chao Wang , Hengshu Zhu , Chen Zhu , Chuan Qin , Hui Xiong

Deep learning-based recommendation has become a widely adopted technique in various online applications. Typically, a deployed model undergoes frequent re-training to capture users' dynamic behaviors from newly collected interaction logs.…

Information Retrieval · Computer Science 2022-04-26 Guohao Cai , Jieming Zhu , Quanyu Dai , Zhenhua Dong , Xiuqiang He , Ruiming Tang , Rui Zhang

Ephemeral group recommendation (EGR) aims to suggest items for a group of users who come together for the first time. Existing work typically consider individual preferences as the sole factor in aggregating group preferences. However, they…

Information Retrieval · Computer Science 2024-12-03 Guangze Ye , Wen Wu , Liye Shi , Wenxin Hu , Xin Chen , Liang He

Recommender systems attempt to reduce information overload and retain customers by selecting a subset of items from a universal set based on user preferences. While research in recommender systems grew out of information retrieval and…

Information Retrieval · Computer Science 2007-05-23 Saverio Perugini , Marcos Andre Goncalves , Edward A. Fox

The task of item recommendation is to select the best items for a user from a large catalogue of items. Item recommenders are commonly trained from implicit feedback which consists of past actions that are positive only. Core challenges of…

Information Retrieval · Computer Science 2021-01-22 Steffen Rendle

We present a novel framework for user representation in large-scale recommender systems, aiming at effectively representing diverse user taste in a generalized manner. Our approach employs a two-stage methodology combining representation…

Information Retrieval · Computer Science 2024-03-04 Ghazal Fazelnia , Sanket Gupta , Claire Keum , Mark Koh , Ian Anderson , Mounia Lalmas

Recommender systems rely heavily on user feedback to learn effective user and item representations. Despite their widespread adoption, limited attention has been given to the uncertainty inherent in the feedback used to train these systems.…

Information Retrieval · Computer Science 2025-05-06 Bruno Sguerra , Viet-Anh Tran , Romain Hennequin , Manuel Moussallam

Recommender systems mainly tailor personalized recommendations according to user interests learned from user feedback. However, such recommender systems passively cater to user interests and even reinforce existing interests in the feedback…

Information Retrieval · Computer Science 2024-03-13 Shuxian Bi , Wenjie Wang , Hang Pan , Fuli Feng , Xiangnan He

We introduce a new convolutional AutoEncoder architecture for user modelling and recommendation tasks with several improvements over the state of the art. Firstly, our model has the flexibility to learn a set of associations and…

Machine Learning · Computer Science 2025-09-10 Antoine Ledent , Petr Kasalický , Rodrigo Alves , Hady W. Lauw

Learning from implicit feedback is a fundamental problem in modern recommender systems, where only positive interactions are observed and explicit negative signals are unavailable. In such settings, negative sampling plays a critical role…

Information Retrieval · Computer Science 2026-02-24 Chen Chen , Haobo Lin , Yuanbo Xu

Recommender Systems are a subclass of information retrieval systems, or more succinctly, a class of information filtering systems that seeks to predict how close is the match of the user's preference to a recommended item. A common approach…

Information Retrieval · Computer Science 2021-03-09 John Kalung Leung , Igor Griva , William G. Kennedy

As a highly data-driven application, recommender systems could be affected by data bias, resulting in unfair results for different data groups, which could be a reason that affects the system performance. Therefore, it is important to…

Information Retrieval · Computer Science 2021-04-22 Yunqi Li , Hanxiong Chen , Zuohui Fu , Yingqiang Ge , Yongfeng Zhang

In recent years, deep neural network is introduced in recommender systems to solve the collaborative filtering problem, which has achieved immense success on computer vision, speech recognition and natural language processing. On one hand,…

Information Retrieval · Computer Science 2020-10-14 Ge Fan , Wei Zeng , Shan Sun , Biao Geng , Weiyi Wang , Weibo Liu