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As the amount of textual data has been rapidly increasing over the past decade, efficient similarity search methods have become a crucial component of large-scale information retrieval systems. A popular strategy is to represent original…

Information Retrieval · Computer Science 2017-08-14 Suthee Chaidaroon , Yi Fang

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

Recent studies on scaling up ranking models have achieved substantial improvement for recommendation systems and search engines. However, most large-scale ranking systems rely on item IDs, where each item is treated as an independent…

Information Retrieval · Computer Science 2026-02-02 Zhen Zhao , Tong Zhang , Jie Xu , Qingliang Cai , Qile Zhang , Leyuan Yang , Daorui Xiao , Xiaojia Chang

Generative Recommendation (GR) has excelled by framing recommendation as next-token prediction. This paradigm relies on Semantic IDs (SIDs) to tokenize large-scale items into discrete sequences. Existing GR approaches predominantly generate…

Information Retrieval · Computer Science 2026-05-22 Jie Jiang , Xinxun Zhang , Enming Zhang , Yuling Xiong , Jun Zhang , Jingwen Wang , Huan Yu , Yuxiang Wang , Hao Wang , Xiao Yan , Jiawei Jiang

Recommender systems are essential for guiding users through the vast and diverse landscape of digital content by delivering personalized and relevant suggestions. However, improving both personalization and interpretability remains a…

Information Retrieval · Computer Science 2025-08-05 Danial Ebrat , Tina Aminian , Sepideh Ahmadian , Luis Rueda

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

This paper develops an edge-device collaborative Generative Semantic Communications (Gen SemCom) framework leveraging pre-trained Multi-modal/Vision Language Models (M/VLMs) for ultra-low-rate semantic communication via textual prompts. The…

Information Theory · Computer Science 2025-05-05 Mengmeng Ren , Li Qiao , Long Yang , Zhen Gao , Jian Chen , Mahdi Boloursaz Mashhadi , Pei Xiao , Rahim Tafazolli , Mehdi Bennis

Most current recommender systems primarily focus on what to recommend, assuming users always require personalized recommendations. However, with the widely spread of ChatGPT and other chatbots, a more crucial problem in the context of…

Information Retrieval · Computer Science 2024-04-09 Zhefan Wang , Weizhi Ma , Min Zhang

Sequential Recommendation (SR) learns user preferences from their historical interaction sequences and provides personalized suggestions. In real-world scenarios, most items exhibit sparse interactions, known as the tail-item problem. This…

Information Retrieval · Computer Science 2026-04-07 Zhifu Wei , Yizhou Dang , Guibing Guo , Chuang Zhao , Zhu Sun

Recently, sequential recommendation has emerged as a widely studied topic. Existing researches mainly design effective neural architectures to model user behavior sequences based on item IDs. However, this kind of approach highly relies on…

Information Retrieval · Computer Science 2022-06-07 Shanlei Mu , Yupeng Hou , Wayne Xin Zhao , Yaliang Li , Bolin Ding

In modern recommender systems, list-wise reranking serves as a critical phase within the multi-stage pipeline, finalizing the exposed item sequence and directly impacting user satisfaction by modeling complex intra-list item dependencies.…

Synthetic users are cost-effective proxies for real users in the evaluation of conversational recommender systems. Large language models show promise in simulating human-like behavior, raising the question of their ability to represent a…

Computation and Language · Computer Science 2024-03-27 Se-eun Yoon , Zhankui He , Jessica Maria Echterhoff , Julian McAuley

Norm-aware recommender systems have gained increased attention, especially for diversity optimization. The recommender systems community has well-established experimentation pipelines that support reproducible evaluations by facilitating…

Information Retrieval · Computer Science 2025-08-19 Lucien Heitz , Runze Li , Oana Inel , Abraham Bernstein

Recommender systems typically represent users and items by learning their embeddings, which are usually set to uniform dimensions and dominate the model parameters. However, real-world recommender systems often operate in streaming…

Information Retrieval · Computer Science 2026-02-05 Yunke Qu , Liang Qu , Tong Chen , Xiangyu Zhao , Quoc Viet Hung Nguyen , Hongzhi Yin

E-commerce platforms have a vast catalog of items to cater to their customers' shopping interests. Most of these platforms assist their customers in the shopping process by offering optimized recommendation carousels, designed to help…

Information Retrieval · Computer Science 2025-08-18 Shanu Vashishtha , Abhay Kumar , Lalitesh Morishetti , Kaushiki Nag , Kannan Achan

Wireless extended reality (XR) has attracted wide attentions as a promising technology to improve users' mobility and quality of experience. However, the ultra-high data rate requirement of wireless XR has hindered its development for many…

Signal Processing · Electrical Eng. & Systems 2023-03-14 Bowen Zhang , Zhijin Qin , Geoffrey Ye Li

Variational approximations are increasingly based on gradient-based optimization of expectations estimated by sampling. Handling discrete latent variables is then challenging because the sampling process is not differentiable. Continuous…

Machine Learning · Computer Science 2021-02-09 Tomasz Kuśmierczyk , Arto Klami

Multimodal recommendation aims to model user and item representations comprehensively with the involvement of multimedia content for effective recommendations. Existing research has shown that it is beneficial for recommendation performance…

Information Retrieval · Computer Science 2024-05-24 Yuting Liu , Enneng Yang , Yizhou Dang , Guibing Guo , Qiang Liu , Yuliang Liang , Linying Jiang , Xingwei Wang

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

While large-scale pretrained language models have obtained impressive results when fine-tuned on a wide variety of tasks, they still often suffer from overfitting in low-resource scenarios. Since such models are general-purpose feature…

Computation and Language · Computer Science 2021-06-11 Rabeeh Karimi Mahabadi , Yonatan Belinkov , James Henderson