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Generative recommendation aims to learn the underlying generative process over the entire item set to produce recommendations for users. Although it leverages non-linear probabilistic models to surpass the limited modeling capacity of…

Information Retrieval · Computer Science 2025-04-24 Yi Zhang , Yiwen Zhang , Yu Wang , Tong Chen , Hongzhi Yin

Recommendation systems effectively guide users in locating their desired information within extensive content repositories. Generally, a recommendation model is optimized to enhance accuracy metrics from a user utility standpoint, such as…

Information Retrieval · Computer Science 2023-10-23 Xu Huang , Jianxun Lian , Hao Wang , Defu Lian , Xing Xie

Intent-based recommender systems have garnered significant attention for uncovering latent fine-grained preferences. Intents, as underlying factors of interactions, are crucial for improving recommendation interpretability. Most methods…

Information Retrieval · Computer Science 2025-04-10 Yu Wang , Lei Sang , Yi Zhang , Yiwen Zhang

Multimodal recommendation systems are increasingly becoming foundational technologies for e-commerce and content platforms, enabling personalized services by jointly modeling users' historical behaviors and the multimodal features of items…

Information Retrieval · Computer Science 2025-09-12 Kelin Ren , Chan-Yang Ju , Dong-Ho Lee

Generative models have emerged as a promising utility to enhance recommender systems. It is essential to model both item content and user-item collaborative interactions in a unified generative framework for better recommendation. Although…

Information Retrieval · Computer Science 2024-11-13 Yidan Wang , Zhaochun Ren , Weiwei Sun , Jiyuan Yang , Zhixiang Liang , Xin Chen , Ruobing Xie , Su Yan , Xu Zhang , Pengjie Ren , Zhumin Chen , Xin Xin

Recommender systems typically retrieve items from an item corpus for personalized recommendations. However, such a retrieval-based recommender paradigm faces two limitations: 1) the human-generated items in the corpus might fail to satisfy…

Information Retrieval · Computer Science 2024-02-27 Wenjie Wang , Xinyu Lin , Fuli Feng , Xiangnan He , Tat-Seng Chua

Recommender Systems are built to retrieve relevant items to satisfy users' information needs. The candidate corpus usually consists of a finite set of items that are ready to be served, such as videos, products, or articles. With recent…

Information Retrieval · Computer Science 2023-12-08 Yuanhe Guo , Haoming Liu , Hongyi Wen

Generative Retrieval (GR) offers a promising paradigm for recommendation through next-token prediction (NTP). However, scaling it to large-scale industrial systems introduces three challenges: (i) within a single request, the identical…

Information Retrieval · Computer Science 2026-04-17 Yanyan Zou , Junbo Qi , Lunsong Huang , Yu Li , Kewei Xu , Jiabao Gao , Binglei Zhao , Xuanhua Yang , Sulong Xu , Shengjie Li

Recommender systems (RSs) have gained widespread applications across various domains owing to the superior ability to capture users' interests. However, the complexity and nuanced nature of users' interests, which span a wide range of…

Information Retrieval · Computer Science 2024-02-22 Yuying Zhao , Minghua Xu , Huiyuan Chen , Yuzhong Chen , Yiwei Cai , Rashidul Islam , Yu Wang , Tyler Derr

Many existing industrial recommender systems are sensitive to the patterns of user-item engagement. Light users, who interact less frequently, correspond to a data sparsity problem, making it difficult for the system to accurately learn and…

Information Retrieval · Computer Science 2024-08-08 Hanjia Lyu , Hanqing Zeng , Yinglong Xia , Ren Chen , Jiebo Luo

Recent advances in Large Language Models (LLMs) have demonstrated promising performance in sequential recommendation tasks, leveraging their superior language understanding capabilities. However, existing LLM-based recommendation approaches…

Information Retrieval · Computer Science 2024-12-10 Minglai Shao , Hua Huang , Qiyao Peng , Hongtao Liu

Generative Recommendation (GR) has emerged as a new paradigm in recommender systems. This approach relies on quantized representations to discretize item features, modeling users' historical interactions as sequences of discrete tokens.…

Information Retrieval · Computer Science 2025-11-25 Fuwei Zhang , Xiaoyu Liu , Dongbo Xi , Jishen Yin , Huan Chen , Peng Yan , Fuzhen Zhuang , Zhao Zhang

User modeling plays a fundamental role in industrial recommender systems, either in the matching stage and the ranking stage, in terms of both the customer experience and business revenue. How to extract users' multiple interests…

Information Retrieval · Computer Science 2021-12-07 Jiaxuan Xie , Jianxiong Wei , Qingsong Hua , Yu Zhang

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

Generative Recommender Systems using semantic ids, such as TIGER (Rajput et al., 2023), have emerged as a widely adopted competitive paradigm in sequential recommendation. However, existing architectures are designed solely for semantic…

Information Retrieval · Computer Science 2026-03-24 Yanchen Jiang , Zhe Feng , Christopher P. Mah , Aranyak Mehta , Di Wang

While generative recommendations (GR) possess strong sequential reasoning capabilities, they face significant challenges when processing extremely long user behavior sequences: the high computational cost forces practical sequence lengths…

Information Retrieval · Computer Science 2026-02-17 Yu Zhou , Chengcheng Guo , Kuo Cai , Ji Liu , Qiang Luo , Ruiming Tang , Han Li , Kun Gai , Guorui Zhou

User interests on content platforms are inherently diverse, manifesting through complex behavioral patterns across heterogeneous scenarios such as search, feed browsing, and content discovery. Traditional recommendation systems typically…

Information Retrieval · Computer Science 2025-10-29 Manjie Xu , Cheng Chen , Xin Jia , Jingyi Zhou , Yongji Wu , Zejian Wang , Chi Zhang , Kai Zuo , Yibo Chen , Xu Tang , Yao Hu , Yixin Zhu

With the dynamic evolution of user interests and the increasing multimodal demands in internet applications, personalized content generation strategies based on static interest preferences struggle to meet practical application…

Information Retrieval · Computer Science 2025-09-05 Tian Miao

Heterogeneous information networks (HINs) are widely applied to recommendation systems due to their capability of modeling various auxiliary information with meta-paths. However, existing HIN-based recommendation models usually fuse the…

Information Retrieval · Computer Science 2022-03-09 Dengcheng Yan , Wenxin Xie , Yiwen Zhang

Learning effective feature interactions is central to modern recommender systems, yet remains challenging in industrial settings due to sparse multi-field inputs and ultra-long user behavior sequences. While recent scaling efforts have…

Information Retrieval · Computer Science 2026-02-13 Fangye Wang , Guowei Yang , Xiaojiang Zhou , Song Yang , Pengjie Wang