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While recent advancements in aligning Large Language Models (LLMs) with recommendation tasks have shown great potential and promising performance overall, these aligned recommendation LLMs still face challenges in complex scenarios. This is…

Information Retrieval · Computer Science 2025-02-18 Yi Fang , Wenjie Wang , Yang Zhang , Fengbin Zhu , Qifan Wang , Fuli Feng , Xiangnan He

The recent success of large language models (LLMs) has renewed interest in whether recommender systems can achieve similar scaling benefits. Conventional recommenders, dominated by massive embedding tables, tend to plateau as embedding…

Information Retrieval · Computer Science 2025-10-29 Xiaoyu Kong , Leheng Sheng , Junfei Tan , Yuxin Chen , Jiancan Wu , An Zhang , Xiang Wang , Xiangnan He

Industrial recommender systems have been growing increasingly complex, may involve \emph{diverse domains} such as e-commerce products and user-generated contents, and can comprise \emph{a myriad of tasks} such as retrieval, ranking,…

Information Retrieval · Computer Science 2022-05-20 Zeyu Cui , Jianxin Ma , Chang Zhou , Jingren Zhou , Hongxia Yang

This paper addresses the challenge of building multimodal recommender systems for the movie domain, where sparse item metadata (e.g., title and genres) can limit retrieval quality and downstream recommendations. We introduce RAG-VisualRec,…

Information Retrieval · Computer Science 2026-02-17 Ali Tourani , Fatemeh Nazary , Yashar Deldjoo

Federated recommender system (FedRec) has emerged as a solution to protect user data through collaborative training techniques. A typical FedRec involves transmitting the full model and entire weight updates between edge devices and the…

Cryptography and Security · Computer Science 2025-06-10 Peihua Mai , Youlong Ding , Ziyan Lyu , Minxin Du , Yan Pang

This paper addresses two persistent challenges in sequential recommendation: (i) evidence insufficiency-cold-start sparsity together with noisy, length-varying item texts; and (ii) opaque modeling of dynamic, multi-faceted intents across…

Information Retrieval · Computer Science 2026-04-29 Yuchen Miao , Mingxuan Cui , Yitong Zhu , Yu Wang , Siyang Xu

Recommender systems play a crucial role in our daily lives. Feed streaming mechanism has been widely used in the recommender system, especially on the mobile Apps. The feed streaming setting provides users the interactive manner of…

Information Retrieval · Computer Science 2019-07-12 Lixin Zou , Long Xia , Zhuoye Ding , Jiaxing Song , Weidong Liu , Dawei Yin

The integration of reinforcement learning (RL) into large language models (LLMs) has opened new opportunities for recommender systems by eliciting reasoning and improving user preference modeling. However, RL-based LLM recommendation faces…

Information Retrieval · Computer Science 2026-02-05 Lin Wang , Yang Zhang , Jingfan Chen , Xiaoyan Zhao , Fengbin Zhu , Qing Li , Tat-Seng Chua

Sequential recommendation models user preferences to predict the next target item. Most existing work is passive, where the system responds only when users open the application, missing chances after closure. We investigate active…

Information Retrieval · Computer Science 2025-11-25 Jin Chai , Xiaoxiao Ma , Jian Yang , Jia Wu

Using a single tool to build and compare recommender systems significantly reduces the time to market for new models. In addition, the comparison results when using such tools look more consistent. This is why many different tools and…

Information Retrieval · Computer Science 2024-10-07 Alexey Vasilev , Anna Volodkevich , Denis Kulandin , Tatiana Bysheva , Anton Klenitskiy

Deep learning recommendation systems serve personalized content under diverse tail-latency targets and input-query loads. In order to do so, state-of-the-art recommendation models rely on terabyte-scale embedding tables to learn user…

Hardware Architecture · Computer Science 2023-02-22 Samuel Hsia , Udit Gupta , Bilge Acun , Newsha Ardalani , Pan Zhong , Gu-Yeon Wei , David Brooks , Carole-Jean Wu

The emerging meta- and multi-verse landscape is yet another step towards the more prevalent use of already ubiquitous online markets. In such markets, recommender systems play critical roles by offering items of interest to the users,…

Information Retrieval · Computer Science 2022-09-28 Ehsan Gholami , Mohammad Motamedi , Ashwin Aravindakshan

Generative retrieval methods utilize generative sequential modeling techniques, such as transformers, to generate candidate items for recommender systems. These methods have demonstrated promising results in academic benchmarks, surpassing…

Information Retrieval · Computer Science 2026-03-05 Prabhat Agarwal , Anirudhan Badrinath , Laksh Bhasin , Jaewon Yang , Edoardo Botta , Jiajing Xu , Charles Rosenberg

Route recommendation systems commonly adopt a multi-stage pipeline involving fine-ranking and re-ranking to produce high-quality ordered recommendations. However, this paradigm faces three critical limitations. First, there is a…

Information Retrieval · Computer Science 2026-05-11 Chao Chen , Longfei Xu , Daohan Su , Tengfei Liu , Hanyu Guo , Yihai Duan , Kaikui Liu , Xiangxiang Chu

Modern e-commerce platforms offer vast product selections, making it difficult for customers to find items that they like and that are relevant to their current session intent. This is why it is key for e-commerce platforms to have near…

In this study, we reproduced the work done in the paper "XRec: Large Language Models for Explainable Recommendation" by Ma et al. (2024). The original authors introduced XRec, a model-agnostic collaborative instruction-tuning framework that…

Computation and Language · Computer Science 2025-10-09 Ranjan Mishra , Julian I. Bibo , Quinten van Engelen , Henk Schaapman

Learning large-scale pre-trained models on broad-ranging data and then transfer to a wide range of target tasks has become the de facto paradigm in many machine learning (ML) communities. Such big models are not only strong performers in…

Information Retrieval · Computer Science 2025-09-23 Jie Wang , Fajie Yuan , Mingyue Cheng , Joemon M. Jose , Chenyun Yu , Beibei Kong , Zhijin Wang , Bo Hu , Zang Li

The powerful generative capacity of Large Language Models (LLMs) has instigated a paradigm shift in recommendation. However, existing generative models (e.g., OneRec) operate as implicit predictors, critically lacking the capacity for…

The integration of multimodal information into sequential recommender systems has attracted significant attention in recent research. In the initial stages of multimodal sequential recommendation models, the mainstream paradigm was…

Information Retrieval · Computer Science 2024-03-06 Jiaxi Hu , Jingtong Gao , Xiangyu Zhao , Yuehong Hu , Yuxuan Liang , Yiqi Wang , Ming He , Zitao Liu , Hongzhi Yin

Recently, one critical issue looms large in the field of recommender systems -- there are no effective benchmarks for rigorous evaluation -- which consequently leads to unreproducible evaluation and unfair comparison. We, therefore, conduct…

Information Retrieval · Computer Science 2024-08-29 Zhu Sun , Hui Fang , Jie Yang , Xinghua Qu , Hongyang Liu , Di Yu , Yew-Soon Ong , Jie Zhang