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Implicit feedback, such as user clicks, serves as the primary data source for modern recommender systems. However, click interactions inherently contain substantial noise, including accidental clicks, clickbait-induced interactions, and…

Information Retrieval · Computer Science 2026-02-18 Xikai Yang , Yang Wang , Yilin Li , Sebastian Sun

A real-world application or setting involves interaction between different modalities (e.g., video, speech, text). In order to process the multimodal information automatically and use it for an end application, Multimodal Representation…

Computer Vision and Pattern Recognition · Computer Science 2022-11-08 Abhinav Joshi , Naman Gupta , Jinang Shah , Binod Bhattarai , Ashutosh Modi , Danail Stoyanov

Multimodal recommendation systems (MRS) jointly model user-item interaction graphs and rich item content, but this tight coupling makes user data difficult to remove once learned. Approximate machine unlearning offers an efficient…

Artificial Intelligence · Computer Science 2026-04-13 Zhanting Zhou , KaHou Tam , Ziqiang Zheng , Zeyu Ma , Yang Yang

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

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

Music Recommendation Systems (MRSs) are a cornerstone of modern streaming platforms. Existing recommendation models, spanning both recall and ranking stages, predominantly rely on collaborative filtering, which fails to exploit the…

Information Retrieval · Computer Science 2026-04-24 Yizhi Zhou , Jia-Qi Yang , De-Chuan Zhan , Da-Wei Zhou

Session-based recommendation is devoted to characterizing preferences of anonymous users based on short sessions. Existing methods mostly focus on mining limited item co-occurrence patterns exposed by item ID within sessions, while ignoring…

Information Retrieval · Computer Science 2023-10-02 Xiaokun Zhang , Bo Xu , Fenglong Ma , Chenliang Li , Liang Yang , Hongfei 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

Sequential recommender systems (SRSs) aim to suggest next item for a user based on her historical interaction sequences. Recently, many research efforts have been devoted to attenuate the influence of noisy items in sequences by either…

Information Retrieval · Computer Science 2024-06-21 Xiaofei Zhu , Liang Li , Weidong Liu , Xin Luo

We study the problem of inferring substitutable and complementary items, which underpins applications such as alternative and follow-up purchase suggestions. Existing approaches typically learn from behavior-derived item-item associations…

Information Retrieval · Computer Science 2026-05-05 Junting Wang , Chenghuan Guo , Jiao Yang , Yanhui Guo , Hari Sundaram , Yan Gao

Multimodal-aware recommender systems (MRSs) exploit multimodal content (e.g., product images or descriptions) as items' side information to improve recommendation accuracy. While most of such methods rely on factorization models (e.g.,…

Information Retrieval · Computer Science 2023-08-25 Daniele Malitesta , Giandomenico Cornacchia , Claudio Pomo , Tommaso Di Noia

Implicit feedback -- the main data source for training Recommender Systems (RSs) -- is inherently noisy and has been shown to negatively affect recommendation effectiveness. Denoising has been proposed as a method for removing noisy…

Information Retrieval · Computer Science 2026-01-27 Ervin Dervishaj , Maria Maistro , Tuukka Ruotsalo , Christina Lioma

User simulation is increasingly vital to develop and evaluate recommender systems (RSs). While Large Language Models (LLMs) offer promising avenues to simulate user behavior, they often struggle with the absence of specific task alignment…

Human-Computer Interaction · Computer Science 2026-04-20 Tianjun Wei , Huizhong Guo , Yingpeng Du , Zhu Sun , Huang Chen , Dongxia Wang , Jie Zhang

Social recommendation leverages social network to complement user-item interaction data for recommendation task, aiming to mitigate the data sparsity issue in recommender systems. However, existing social recommendation methods encounter…

Information Retrieval · Computer Science 2024-05-09 Wenjie Chen , Yi Zhang , Honghao Li , Lei Sang , Yiwen Zhang

Conversational Recommender Systems (CRSs) aim to provide personalized recommendations by interacting with users through conversations. Most existing studies of CRS focus on extracting user preferences from conversational contexts. However,…

Information Retrieval · Computer Science 2025-04-28 Yibiao Wei , Jie Zou , Weikang Guo , Guoqing Wang , Xing Xu , Yang Yang

Users' reviews contain valuable information which are not taken into account in most recommender systems. According to the latest studies in this field, using review texts could not only improve the performance of recommendation, but it can…

Information Retrieval · Computer Science 2020-03-17 Parisa Abolfath Beygi Dezfouli , Saeedeh Momtazi , Mehdi Dehghan

One of the main challenges in recommender systems is data sparsity which leads to high variance. Several attempts have been made to improve the bias-variance trade-off using auxiliary information. In particular, document modeling-based…

Information Retrieval · Computer Science 2021-09-14 Meysam Varasteh , Mehdi Soleiman Nejad , Hadi Moradi , Mohammad Amin Sadeghi , Ahmad Kalhor

Multimodal sequential recommendation (MSR) leverages diverse item modalities to improve recommendation accuracy, while achieving effective and adaptive fusion remains challenging. Existing MSR models often overlook synergistic information…

Information Retrieval · Computer Science 2026-01-19 Xinyi Zhang , Yutong Li , Peijie Sun , Letian Sha , Zhongxuan Han

Many multimodal recommender systems have been proposed to exploit the rich side information associated with users or items (e.g., user reviews and item images) for learning better user and item representations to improve the recommendation…

Information Retrieval · Computer Science 2022-10-26 Fan Liu , Huilin Chen , Zhiyong Cheng , Anan Liu , Liqiang Nie , Mohan Kankanhalli

Recommender Systems (RS) play a pivotal role in boosting user satisfaction by providing personalized product suggestions in domains such as e-commerce and entertainment. This study examines the integration of multimodal data text and audio…

Information Retrieval · Computer Science 2024-09-16 Zezheng Qin