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Retrieval-augmented generation (RAG) systems enhance large language models (LLMs) with external knowledge but are vulnerable to corpus poisoning and contamination attacks, which can compromise output integrity. Existing defenses often apply…

Computation and Language · Computer Science 2025-10-16 Xiaonan Si , Meilin Zhu , Simeng Qin , Lijia Yu , Lijun Zhang , Shuaitong Liu , Xinfeng Li , Ranjie Duan , Yang Liu , Xiaojun Jia

Generative recommendation (GR) aligns with advances in generative AI by casting next-item prediction as token-level generation rather than score-based ranking. Most GR methods adopt a two-stage pipeline: (i) \textit{item tokenization},…

Information Retrieval · Computer Science 2026-02-26 Zhenxiang Xu , Jiawei Chen , Sirui Chen , Yong He , Jieyu Yang , Chuan Yuan , Ke Ding , Can Wang

We revisit retrieval-augmented generation (RAG) by embedding retrieval control directly into generation. Instead of treating retrieval as an external intervention, we express retrieval decisions within token-level decoding, enabling…

Computation and Language · Computer Science 2026-04-21 Bo Li , Mingda Wang , Gexiang Fang , Shikun Zhang , Wei Ye

Retrieval-Augmented Generation (RAG) enables large language models (LLMs) to access external knowledge sources, but the effectiveness of RAG relies on the coordination between the retriever and the generator. Since these components are…

Computation and Language · Computer Science 2025-09-24 Junlin Wang , Zehao Wu , Shaowei Lu , Yanlan Li , Xinghao Huang

Contemporary recommendation systems are designed to meet users' needs by delivering tailored lists of items that align with their specific demands or interests. In a multi-stage recommendation system, reranking plays a crucial role by…

Information Retrieval · Computer Science 2025-03-26 Yuxin Ren , Qiya Yang , Yichun Wu , Wei Xu , Yalong Wang , Zhiqiang Zhang

Generative recommendation commonly adopts a two-stage pipeline in which a learnable tokenizer maps items to discrete token sequences (i.e. identifiers) and an autoregressive generative recommender model (GRM) performs prediction based on…

Information Retrieval · Computer Science 2026-04-01 Yuebo Feng , Jiahao Liu , Mingzhe Han , Dongsheng Li , Hansu Gu , Peng Zhang , Tun Lu , Ning Gu

Graph-based collaborative filtering methods have prevailing performance for recommender systems since they can capture high-order information between users and items, in which the graphs are constructed from the observed user-item…

Information Retrieval · Computer Science 2024-01-24 Hongjian Gu , Yaochen Hu , Yingxue Zhang

Personalized image generation is crucial for improving the user experience, as it renders reference images into preferred ones according to user visual preferences. Although effective, existing methods face two main issues. First, existing…

The rise of generative models has driven significant advancements in recommender systems, leaving unique opportunities for enhancing users' personalized recommendations. This workshop serves as a platform for researchers to explore and…

Information Retrieval · Computer Science 2024-03-08 Wenjie Wang , Yang Zhang , Xinyu Lin , Fuli Feng , Weiwen Liu , Yong Liu , Xiangyu Zhao , Wayne Xin Zhao , Yang Song , Xiangnan He

Retrieval-augmented generation (RAG) has become a cornerstone for knowledge-intensive tasks. However, the efficacy of RAG is often bottlenecked by the ``one-size-fits-all'' retrieval paradigm, as different queries exhibit distinct…

Information Retrieval · Computer Science 2026-04-28 Tong Zhao , Yutao Zhu , Yucheng Tian , Zhicheng Dou

Sequential recommender systems rank relevant items by modeling a user's interaction history and computing the inner product between the resulting user representation and stored item embeddings. To avoid the significant memory overhead of…

Current pre-training works in natural language generation pay little attention to the problem of exposure bias on downstream tasks. To address this issue, we propose an enhanced multi-flow sequence to sequence pre-training and fine-tuning…

Computation and Language · Computer Science 2020-06-09 Dongling Xiao , Han Zhang , Yukun Li , Yu Sun , Hao Tian , Hua Wu , Haifeng Wang

Efficient knowledge retrieval plays a pivotal role in ensuring the success of end-to-end task-oriented dialogue systems by facilitating the selection of relevant information necessary to fulfill user requests. However, current approaches…

Computation and Language · Computer Science 2023-10-24 Tianyuan Shi , Liangzhi Li , Zijian Lin , Tao Yang , Xiaojun Quan , Qifan Wang

Generative Retrieval (GR) is an emerging paradigm in information retrieval that leverages generative models to directly map queries to relevant document identifiers (DocIDs) without the need for traditional query processing or document…

Information Retrieval · Computer Science 2024-06-05 Tzu-Lin Kuo , Tzu-Wei Chiu , Tzung-Sheng Lin , Sheng-Yang Wu , Chao-Wei Huang , Yun-Nung Chen

Retrieval-Augmented Generation (RAG) has gained significant attention in recent years for its potential to enhance natural language understanding and generation by combining large-scale retrieval systems with generative models. RAG…

Computation and Language · Computer Science 2025-03-18 Mingyue Cheng , Yucong Luo , Jie Ouyang , Qi Liu , Huijie Liu , Li Li , Shuo Yu , Bohou Zhang , Jiawei Cao , Jie Ma , Daoyu Wang , Enhong Chen

Generative Sequential Recommendation (GSR) has emerged as a promising paradigm, reframing recommendation as an autoregressive sequence generation task over discrete Semantic IDs (SIDs), typically derived via codebook-based quantization.…

Information Retrieval · Computer Science 2026-01-26 Dengzhao Fang , Jingtong Gao , Yu Li , Xiangyu Zhao , Yi Chang

Multimodal recommendation aims to recommend user-preferred candidates based on her/his historically interacted items and associated multimodal information. Previous studies commonly employ an embed-and-retrieve paradigm: learning user and…

Information Retrieval · Computer Science 2026-01-15 Han Liu , Yinwei Wei , Xuemeng Song , Weili Guan , Yuan-Fang Li , Liqiang Nie

Legal document retrieval and judgment prediction are crucial tasks in intelligent legal systems. In practice, determining whether two documents share the same judgments is essential for establishing their relevance in legal retrieval.…

Information Retrieval · Computer Science 2024-04-16 Weicong Qin , Zelin Cao , Weijie Yu , Zihua Si , Sirui Chen , Jun Xu

In large-scale industrial recommendation systems, retrieval must produce high-quality candidates from massive corpora under strict latency. Recently, Generative Retrieval (GR) has emerged as a viable alternative to Embedding-Based Retrieval…

Information Retrieval · Computer Science 2026-01-27 Zhongchao Yi , Kai Feng , Xiaojian Ma , Yalong Wang , Yongqi Liu , Han Li , Zhengyang Zhou , Yang Wang

Industrial-scale recommender systems rely on a cascade pipeline in which the retrieval stage must return a high-recall candidate set from billions of items under tight latency. Existing solutions either (i) suffer from limited…

Information Retrieval · Computer Science 2026-04-02 Yijia Sun , Shanshan Huang , Zhiyuan Guan , Qiang Luo , Ruiming Tang , Kun Gai , Guorui Zhou