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Personalized recommendation serves as a ubiquitous channel for users to discover information tailored to their interests. However, traditional recommendation models primarily rely on unique IDs and categorical features for user-item…

Information Retrieval · Computer Science 2024-07-04 Qijiong Liu , Jieming Zhu , Yanting Yang , Quanyu Dai , Zhaocheng Du , Xiao-Ming Wu , Zhou Zhao , Rui Zhang , Zhenhua Dong

Generative recommendation (GR) has become a powerful paradigm in recommendation systems that implicitly links modality and semantics to item representation, in contrast to previous methods that relied on non-semantic item identifiers in…

Information Retrieval · Computer Science 2025-04-01 Jing Zhu , Mingxuan Ju , Yozen Liu , Danai Koutra , Neil Shah , Tong Zhao

Many recommender systems suffer from popularity bias: popular items are recommended frequently while less popular, niche products, are recommended rarely or not at all. However, recommending the ignored products in the `long tail' is…

Information Retrieval · Computer Science 2019-08-13 Himan Abdollahpouri , Robin Burke , Bamshad Mobasher

A well-designed recommender system can accurately capture the attributes of users and items, reflecting the unique preferences of individuals. Traditional recommendation techniques usually focus on modeling the singular type of behaviors…

Information Retrieval · Computer Science 2023-03-06 Hongrui Xuan , Yi Liu , Bohan Li , Hongzhi Yin

Multi-objective recommender systems (MORS) provide suggestions to users according to multiple (and possibly conflicting) goals. When a system optimizes its results at the individual-user level, it tailors them on a user's propensity towards…

Information Retrieval · Computer Science 2023-10-17 Patrik Dokoupil , Ladislav Peska , Ludovico Boratto

Top-$K$ recommendation involves inferring latent user preferences and generating personalized recommendations accordingly, which is now ubiquitous in various decision systems. Nonetheless, recommender systems usually suffer from severe…

Information Retrieval · Computer Science 2024-12-30 Yishan Han , Biao Xu , Yao Wang , Shanxing Gao

Multimodal recommender systems utilize various types of information to model user preferences and item features, helping users discover items aligned with their interests. The integration of multimodal information mitigates the inherent…

Information Retrieval · Computer Science 2024-02-20 Shanshan Zhong , Zhongzhan Huang , Daifeng Li , Wushao Wen , Jinghui Qin , Liang Lin

Multimodal recommendation systems (MMRS) have received considerable attention from the research community due to their ability to jointly utilize information from user behavior and product images and text. Previous research has two main…

Information Retrieval · Computer Science 2024-07-18 Guojiao Lin , Zhen Meng , Dongjie Wang , Qingqing Long , Yuanchun Zhou , Meng Xiao

Multimodal recommendation combines the user historical behaviors with the modal features of items to capture the tangible user preferences, presenting superior performance compared to the conventional ID-based recommender systems. However,…

Information Retrieval · Computer Science 2026-01-27 Yuzhuo Dang , Xin Zhang , Zhiqiang Pan , Yuxiao Duan , Wanyu Chen , Fei Cai , Honghui Chen

Recommender systems for software engineering (RSSE) play a crucial role in automating development tasks by providing relevant suggestions according to the developer's context. However, they suffer from the so-called popularity bias, i.e.,…

Software Engineering · Computer Science 2025-01-20 Claudio Di Sipio , Juri Di Rocco , Davide Di Ruscio , Vladyslav Bulhakov

In recommender systems, a common problem is the presence of various biases in the collected data, which deteriorates the generalization ability of the recommendation models and leads to inaccurate predictions. Doubly robust (DR) learning…

Information Retrieval · Computer Science 2022-12-20 Haoxuan Li , Quanyu Dai , Yuru Li , Yan Lyu , Zhenhua Dong , Xiao-Hua Zhou , Peng Wu

Multi-Behavior Recommendation (MBR) leverages multiple user interaction types (e.g., views, clicks, purchases) to enrich preference modeling and alleviate data sparsity issues in traditional single-behavior approaches. However, existing MBR…

Information Retrieval · Computer Science 2026-03-27 Ranxu Zhang , Junjie Meng , Ying Sun , Ziqi Xu , Bing Yin , Hao Li , Yanyong Zhang , Chao Wang

Recommendation algorithms are susceptible to popularity bias: a tendency to recommend popular items even when they fail to meet user needs. A related issue is that the recommendation quality can vary by demographic groups. Marginalized…

Information Retrieval · Computer Science 2021-10-19 Nicola Neophytou , Bhaskar Mitra , Catherine Stinson

Multimedia recommendation has received much attention in recent years. It models user preferences based on both behavior information and item multimodal information. Though current GCN-based methods achieve notable success, they suffer from…

Information Retrieval · Computer Science 2023-08-08 Penghang Yu , Zhiyi Tan , Guanming Lu , Bing-Kun Bao

Multimodal recommendation has emerged as a mainstream paradigm, typically leveraging text and visual embeddings extracted from pre-trained models such as Sentence-BERT, Vision Transformers, and ResNet. This approach is founded on the…

Information Retrieval · Computer Science 2026-01-19 Yu Ye , Junchen Fu , Yu Song , Kaiwen Zheng , Joemon M. Jose

Utilizing review information to enhance recommendation, the de facto review-involved recommender systems, have received increasing interests over the past few years. Thereinto, one advanced branch is to extract salient aspects from textual…

Information Retrieval · Computer Science 2022-01-24 Han Liu , Yangyang Guo , Jianhua Yin , Zan Gao , Liqiang Nie

Generally, items with missing modalities are dropped in multimodal recommendation. However, with this work, we question this procedure, highlighting that it would further damage the pipeline of any multimodal recommender system. First, we…

Information Retrieval · Computer Science 2024-08-22 Daniele Malitesta , Emanuele Rossi , Claudio Pomo , Tommaso Di Noia , Fragkiskos D. Malliaros

Implicit feedback is widely explored by modern recommender systems. Since the feedback is often sparse and imbalanced, it poses great challenges to the learning of complex interactions among users and items. Metric learning has been…

Information Retrieval · Computer Science 2021-03-30 Yanchao Tan , Carl Yang , Xiangyu Wei , Yun Ma , Xiaolin Zheng

There are rich formats of information in the network, such as rating, text, image, and so on, which represent different aspects of user preferences. In the field of recommendation, how to use those data effectively has become a difficult…

Information Retrieval · Computer Science 2019-07-05 Weibin Lin , Lin Li

Recent advancements in Multimodal Large Language Models (MLLMs) have demonstrated significant potential in recommendation systems. However, the effective application of MLLMs to multimodal sequential recommendation remains unexplored: A)…

Information Retrieval · Computer Science 2025-12-25 Haoyu Wang , Yitong Wang , Jining Wang