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Generative Recommendation (GR) has become a promising paradigm for large-scale recommendation systems. However, existing GR models typically perform single-pass decoding without explicit refinement, causing early deviations to accumulate…

Information Retrieval · Computer Science 2026-03-02 Haibo Xing , Hao Deng , Lingyu Mu , Jinxin Hu , Yu Zhang , Xiaoyi Zeng , Jing Zhang

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

Generative recommendation (GR) is an emerging paradigm that tokenizes items into discrete tokens and learns to autoregressively generate the next tokens as predictions. While this token-generation paradigm is expected to surpass traditional…

Information Retrieval · Computer Science 2025-11-25 Yijie Ding , Jiacheng Li , Julian McAuley , Yupeng Hou

Graph-based Retrieval-Augmented Generation (RAG) has shown great capability in enhancing Large Language Model (LLM)'s answer with an external knowledge base. Compared to traditional RAG, it introduces a graph as an intermediate…

Information Retrieval · Computer Science 2025-06-18 Ke Wang , Bo Pan , Yingchaojie Feng , Yuwei Wu , Jieyi Chen , Minfeng Zhu , Wei Chen

Generative Recommenders (GRs), exemplified by the Hierarchical Sequential Transduction Unit (HSTU), have emerged as a powerful paradigm for modeling long user interaction sequences. However, we observe that their "flat-sequence" assumption…

Information Retrieval · Computer Science 2026-03-03 Zerui Chen , Heng Chang , Tianying Liu , Chuantian Zhou , Yi Cao , Jiandong Ding , Ming Liu , Bing Qin

Large Language Model (LLM)-based generative recommendation has achieved notable success, yet its practical deployment is costly particularly due to excessive inference latency caused by autoregressive decoding. For lossless LLM decoding…

Information Retrieval · Computer Science 2025-02-27 Xinyu Lin , Chaoqun Yang , Wenjie Wang , Yongqi Li , Cunxiao Du , Fuli Feng , See-Kiong Ng , Tat-Seng Chua

Disaggregating the prefill and decoding phases represents an effective new paradigm for generative inference of large language models (LLM), which eliminates prefill-decoding interference and optimizes resource allocation. However, it is…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-02-13 Youhe Jiang , Ran Yan , Binhang Yuan

Traditional recommender systems such as matrix factorization methods have primarily focused on learning a shared dense embedding space to represent both items and user preferences. Subsequently, sequence models such as RNN, GRUs, and,…

Information Retrieval · Computer Science 2024-08-27 Yaoyiran Li , Xiang Zhai , Moustafa Alzantot , Keyi Yu , Ivan Vulić , Anna Korhonen , Mohamed Hammad

Scaling law has been extensively validated in many domains such as natural language processing and computer vision. In the recommendation system, recent work has adopted generative recommendations to achieve scalability, but their…

Information Retrieval · Computer Science 2025-08-25 Ruidong Han , Bin Yin , Shangyu Chen , He Jiang , Fei Jiang , Xiang Li , Chi Ma , Mincong Huang , Xiaoguang Li , Chunzhen Jing , Yueming Han , Menglei Zhou , Lei Yu , Chuan Liu , Wei Lin

Model merging (MM) offers an efficient mechanism for integrating multiple specialized models without access to original training data or costly retraining. While MM has demonstrated success in domains like computer vision, its role in…

Information Retrieval · Computer Science 2026-01-30 Tianjun Wei , Enneng Yang , Yingpeng Du , Huizhong Guo , Jie Zhang , Zhu Sun

Recommender systems are pivotal in enhancing user experiences across various web applications by analyzing the complicated relationships between users and items. Knowledge graphs(KGs) have been widely used to enhance the performance of…

Information Retrieval · Computer Science 2024-07-02 Guangsi Shi , Xiaofeng Deng , Linhao Luo , Lijuan Xia , Lei Bao , Bei Ye , Fei Du , Shirui Pan , Yuxiao Li

Recent progress in large language model (LLM) based generative recommendation (GR) shows that leveraging LLM world knowledge can substantially improve performance. However, existing methods rely on fixed, manually designed instructions to…

Information Retrieval · Computer Science 2026-05-20 Lingyu Mu , Hao Deng , Haibo Xing , Kaican Lin , Zhitong Zhu , Yu Zhang , Xiaoyi Zeng , Zhengxiao Liu , Zheng Lin , Jinxin Hu

In modern search systems, search engines often suggest relevant queries to users through various panels or components, helping refine their information needs. Traditionally, these recommendations heavily rely on historical search logs to…

Information Retrieval · Computer Science 2025-07-08 Erxue Min , Hsiu-Yuan Huang , Xihong Yang , Min Yang , Xin Jia , Yunfang Wu , Hengyi Cai , Junfeng Wang , Shuaiqiang Wang , Dawei Yin

Large Language Models (LLMs) have shown strong potential in recommender systems due to their contextual learning and generalisation capabilities. Existing LLM-based recommendation approaches typically formulate the recommendation task using…

Information Retrieval · Computer Science 2025-07-09 Zeyuan Meng , Zixuan Yi , Iadh Ounis

Generative Recommendation (GR) has emerged as a promising paradigm by formulating item recommendation as a sequence-to-sequence generation task over item identifiers. Recent studies have incorporated multimodal signals to provide richer…

Information Retrieval · Computer Science 2026-05-20 Wei Chen , Xingyu Guo , Shuang Li , Fuwei Zhang , Meng Yuan , Jing Fan , Zhao Zhang , Deqing Wang , Fuzhen Zhuang

Retrieval-augmented generation (RAG) extends large language models (LLMs) with external data sources to enhance factual correctness and domain coverage. Modern RAG pipelines rely on large datastores, creating a significant system challenge:…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-19 Chien-Yu Lin , Keisuke Kamahori , Yiyu Liu , Xiaoxiang Shi , Madhav Kashyap , Yile Gu , Rulin Shao , Zihao Ye , Kan Zhu , Rohan Kadekodi , Stephanie Wang , Arvind Krishnamurthy , Luis Ceze , Baris Kasikci

Large Language Models (LLMs) have been integrated into recommender systems to enhance user behavior comprehension. The Retrieval Augmented Generation (RAG) technique is further incorporated into these systems to retrieve more relevant items…

Information Retrieval · Computer Science 2025-03-27 Sichun Luo , Jian Xu , Xiaojie Zhang , Linrong Wang , Sicong Liu , Hanxu Hou , Linqi Song

This paper focuses on extending the success of large language models (LLMs) to sequential decision making. Existing efforts either (i) re-train or finetune LLMs for decision making, or (ii) design prompts for pretrained LLMs. The former…

Machine Learning · Computer Science 2025-06-17 Dingyang Chen , Qi Zhang , Yinglun Zhu

We study offline scheduling for large language model (LLM) serving under a fixed KV-cache memory budget, where requests have heterogeneous prompt (prefill) and response (decode) lengths. Prompt tokens determine initial KV usage, and each…

Optimization and Control · Mathematics 2026-02-11 Meixuan Wang , Yinyu Ye , Zijie Zhou

Query recommendation systems are ubiquitous in modern search engines, assisting users in producing effective queries to meet their information needs. However, these systems require a large amount of data to produce good recommendations,…

Information Retrieval · Computer Science 2024-06-05 Andrea Bacciu , Enrico Palumbo , Andreas Damianou , Nicola Tonellotto , Fabrizio Silvestri