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Question and answer (Q&A) platforms usually recommend question-answer pairs to meet users' knowledge acquisition needs, unlike traditional recommendations that recommend only one item. This makes user behaviors more complex, and presents…

Information Retrieval · Computer Science 2024-06-10 Changshuo Zhang , Teng Shi , Xiao Zhang , Yanping Zheng , Ruobing Xie , Qi Liu , Jun Xu , Ji-Rong Wen

Retrieval-augmented generation (RAG) has achieved significant success in information retrieval to assist large language models LLMs because it builds an external knowledge database. However, it also has many problems, it consumes a lot of…

Information Retrieval · Computer Science 2025-05-16 Haoyu Kang , Yuzhou Zhu , Yukun Zhong , Ke Wang

Graph Neural Networks (GNNs) have achieved remarkable success in graph-based learning by propagating information among neighbor nodes via predefined aggregation mechanisms. However, such fixed schemes often suffer from two key limitations.…

Computation and Language · Computer Science 2025-10-21 Minghao Guo , Xi Zhu , Haochen Xue , Chong Zhang , Shuhang Lin , Jingyuan Huang , Ziyi Ye , Yongfeng Zhang

Scene graph generation (SGG) endeavors to predict visual relationships between pairs of objects within an image. Prevailing SGG methods traditionally assume a one-off learning process for SGG. This conventional paradigm may necessitate…

Computer Vision and Pattern Recognition · Computer Science 2024-01-29 Tao He , Tongtong Wu , Dongyang Zhang , Guiduo Duan , Ke Qin , Yuan-Fang Li

Shared-account Sequential Recommendation (SSR) aims to provide personalized recommendations for accounts shared by multiple users with varying sequential preferences. Previous studies on SSR struggle to capture the fine-grained associations…

Information Retrieval · Computer Science 2025-04-15 Jinyu Zhang , Zhongying Zhao , Chao Li , Yanwei Yu

In recent years, research has been done on applying Recurrent Neural Networks (RNNs) as recommender systems. Results have been promising, especially in the session-based setting where RNNs have been shown to outperform state-of-the-art…

Information Retrieval · Computer Science 2017-06-26 Massimiliano Ruocco , Ole Steinar Lillestøl Skrede , Helge Langseth

Due to the proliferation of social media, a growing number of users search for and join group activities in their daily life. This develops a need for the study on the ranking-based group identification (RGI) task, i.e., recommending groups…

Social and Information Networks · Computer Science 2022-11-17 Mingdai Yang , Zhiwei Liu , Liangwei Yang , Xiaolong Liu , Chen Wang , Hao Peng , Philip S. Yu

Recommender system (RS) devotes to predicting user preference to a given item and has been widely deployed in most web-scale applications. Recently, knowledge graph (KG) attracts much attention in RS due to its abundant connective…

Information Retrieval · Computer Science 2020-05-28 Yufei Feng , Binbin Hu , Fuyu Lv , Qingwen Liu , Zhiqiang Zhang , Wenwu Ou

Session-based Recommendation (SR) aims to predict the next item for recommendation based on previously recorded sessions of user interaction. The majority of existing approaches to SR focus on modeling the transition patterns of items. In…

Information Retrieval · Computer Science 2022-04-06 Jiahao Yuan , Wendi Ji , Dell Zhang , Jinwei Pan , Xiaoling Wang

Generative retrieval has recently emerged as a promising approach to sequential recommendation, framing candidate item retrieval as an autoregressive sequence generation problem. However, existing generative methods typically focus solely…

Information Retrieval · Computer Science 2024-07-04 Ye Wang , Jiahao Xun , Minjie Hong , Jieming Zhu , Tao Jin , Wang Lin , Haoyuan Li , Linjun Li , Yan Xia , Zhou Zhao , Zhenhua Dong

Social recommendation aims to fuse social links with user-item interactions to alleviate the cold-start problem for rating prediction. Recent developments of Graph Neural Networks (GNNs) motivate endeavors to design GNN-based social…

Social and Information Networks · Computer Science 2021-05-07 Liangwei Yang , Zhiwei Liu , Yingtong Dou , Jing Ma , Philip S. Yu

Stream stochastic gradient descent (SGD) is a simple and efficient method for solving online optimization problems in operations research (OR), where data is generated by parameter-dependent Markov chains. Unlike traditional approaches…

Optimization and Control · Mathematics 2025-09-03 Xiang Li , Jiadong Liang , Xinyun Chen , Zhihua Zhang

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

Live video streaming has become a mainstay as a standard communication solution for several enterprises worldwide. To efficiently stream high-quality live video content to a large amount of offices, companies employ distributed video…

Artificial Intelligence · Computer Science 2020-11-12 Stefanos Antaris , Dimitrios Rafailidis

In streaming Reinforcement Learning (RL), transitions are observed and discarded immediately after a single update. While this minimizes resource usage for on-device applications, it makes agents notoriously sample-inefficient, since…

Machine Learning · Computer Science 2026-02-11 Nilaksh , Antoine Clavaud , Mathieu Reymond , François Rivest , Sarath Chandar

Scene Graph Generation (SGG) unifies object localization and visual relationship reasoning by predicting boxes and subject-predicate-object triples. Yet most pipelines treat SGG as a one-shot, deterministic classification problem rather…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Xin Hu , Ke Qin , Wen Yin , Yuan-Fang Li , Ming Li , Tao He

Incorporating knowledge graph (KG) into recommender system is promising in improving the recommendation accuracy and explainability. However, existing methods largely assume that a KG is complete and simply transfer the "knowledge" in KG at…

Information Retrieval · Computer Science 2019-02-19 Yixin Cao , Xiang Wang , Xiangnan He , Zikun hu , Tat-Seng Chua

Predicting Click-Through Rate (CTR) in billion-scale recommender systems poses a long-standing challenge for Graph Neural Networks (GNNs) due to the overwhelming computational complexity involved in aggregating billions of neighbors. To…

Information Retrieval · Computer Science 2024-05-09 Hao Chen , Yuanchen Bei , Qijie Shen , Yue Xu , Sheng Zhou , Wenbing Huang , Feiran Huang , Senzhang Wang , Xiao Huang

Frequent group activities of human beings have become an indispensable part in their daily life. Group recommendation can recommend satisfactory activities to group members in the recommender systems, and the key issue is how to aggregate…

Social and Information Networks · Computer Science 2019-09-04 Peipei Wang , Lin Li , Yi Yu , Guandong Xu

Naive Retrieval-Augmented Generation (RAG) focuses on individual documents during retrieval and, as a result, falls short in handling networked documents which are very popular in many applications such as citation graphs, social media, and…

Machine Learning · Computer Science 2025-07-15 Yuntong Hu , Zhihan Lei , Zheng Zhang , Bo Pan , Chen Ling , Liang Zhao