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Existing item-based collaborative filtering (ICF) methods leverage only the relation of collaborative similarity. Nevertheless, there exist multiple relations between items in real-world scenarios. Distinct from the collaborative similarity…

Information Retrieval · Computer Science 2019-05-14 Xin Xin , Xiangnan He , Yongfeng Zhang , Yongdong Zhang , Joemon Jose

Information diffusion prediction is a fundamental task which forecasts how an information item will spread among users. In recent years, deep learning based methods, especially those based on recurrent neural networks (RNNs), have achieved…

Social and Information Networks · Computer Science 2020-12-17 Haoran Wang , Cheng Yang

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

Recommendation systems aim to predict users' feedback on items not exposed to them. Confounding bias arises due to the presence of unmeasured variables (e.g., the socio-economic status of a user) that can affect both a user's exposure and…

Machine Learning · Computer Science 2023-06-16 Qing Zhang , Xiaoying Zhang , Yang Liu , Hongning Wang , Min Gao , Jiheng Zhang , Ruocheng Guo

Collaborative filtering (CF), as a standard method for recommendation with implicit feedback, tackles a semi-supervised learning problem where most interaction data are unobserved. Such a nature makes existing approaches highly rely on…

Information Retrieval · Computer Science 2022-07-04 Chenxiao Yang , Qitian Wu , Jipeng Jin , Xiaofeng Gao , Junwei Pan , Guihai Chen

By treating users' interactions as a user-item graph, graph learning models have been widely deployed in Collaborative Filtering(CF) based recommendation. Recently, researchers have introduced Graph Contrastive Learning(GCL) techniques into…

Information Retrieval · Computer Science 2023-07-12 Yonghui Yang , Zhengwei Wu , Le Wu , Kun Zhang , Richang Hong , Zhiqiang Zhang , Jun Zhou , Meng Wang

Recently, leveraging different channels to model social semantic information and using self-supervised learning tasks to boost recommendation performance has been proven to be a very promising work. However, how to deeply dig out the…

Information Retrieval · Computer Science 2022-09-27 Yundong Sun , Dongjie Zhu , Haiwen Du , Zhaoshuo Tian

Inspired by the fact that spreading and collecting information through the Internet becomes the norm, more and more people choose to post for-profit contents (images and texts) in social networks. Due to the difficulty of network censors,…

Computer Vision and Pattern Recognition · Computer Science 2021-04-01 Lu Zhang , Jian Zhang , Zhibin Li , Jingsong Xu

Contrastive learning methods for unsupervised visual representation learning have reached remarkable levels of transfer performance. We argue that the power of contrastive learning has yet to be fully unleashed, as current methods are…

Computer Vision and Pattern Recognition · Computer Science 2021-03-10 Zhenda Xie , Yutong Lin , Zheng Zhang , Yue Cao , Stephen Lin , Han Hu

Incorporating knowledge graph into recommendation is an effective way to alleviate data sparsity. Most existing knowledge-aware methods usually perform recursive embedding propagation by enumerating graph neighbors. However, the number of…

Information Retrieval · Computer Science 2023-04-18 Bingchao Wu , Yangyuxuan Kang , Daoguang Zan , Bei Guan , Yongji Wang

Estimating individual treatment effects (ITE) from observational data is a critical task across various domains. However, many existing works on ITE estimation overlook the influence of hidden confounders, which remain unobserved at the…

Machine Learning · Computer Science 2024-12-06 Binbin Hu , Zhicheng An , Zhengwei Wu , Ke Tu , Ziqi Liu , Zhiqiang Zhang , Jun Zhou , Yufei Feng , Jiawei Chen

Various graph contrastive learning models have been proposed to improve the performance of learning tasks on graph datasets in recent years. While effective and prevalent, these models are usually carefully customized. In particular,…

Machine Learning · Computer Science 2021-11-01 Dongkuan Xu , Wei Cheng , Dongsheng Luo , Haifeng Chen , Xiang Zhang

New Intent Discovery (NID) aims to recognize both new and known intents from unlabeled data with the aid of limited labeled data containing only known intents. Without considering structure relationships between samples, previous methods…

Computation and Language · Computer Science 2023-10-25 Wenkai Shi , Wenbin An , Feng Tian , Qinghua Zheng , QianYing Wang , Ping Chen

The Deepfake technology has raised serious concerns regarding privacy breaches and trust issues. To tackle these challenges, Deepfake detection technology has emerged. Current methods over-rely on the global feature space, which contains…

Computer Vision and Pattern Recognition · Computer Science 2024-10-16 Weijie Zhou , Xiaoqing Luo , Zhancheng Zhang , Jiachen He , Xiaojun Wu

Users' interactions with items are driven by various intents (e.g., preparing for holiday gifts, shopping for fishing equipment, etc.).However, users' underlying intents are often unobserved/latent, making it challenging to leverage such…

Artificial Intelligence · Computer Science 2022-02-08 Yongjun Chen , Zhiwei Liu , Jia Li , Julian McAuley , Caiming Xiong

Despite the popularity of Collaborative Filtering (CF), CF-based methods are haunted by the \textit{cold-start} problem, which has a significantly negative impact on users' experiences with Recommender Systems (RS). In this paper, to…

Information Retrieval · Computer Science 2018-09-03 Lei Zheng , Chun-Ta Lu , Fei Jiang , Jiawei Zhang , Philip S. Yu

Given a graph where every node has certain attributes associated with it and some nodes have labels associated with them, Collective Classification (CC) is the task of assigning labels to every unlabeled node using information from the node…

Machine Learning · Computer Science 2018-11-14 Priyesh Vijayan , Yash Chandak , Mitesh M. Khapra , Srinivasan Parthasarathy , Balaraman Ravindran

Graph Neural Networks (GNNs) are powerful learning methods for recommender systems owing to their robustness in handling complicated user-item interactions. Recently, the integration of contrastive learning with GNNs has demonstrated…

Machine Learning · Computer Science 2024-08-12 Junfeng Long , Hao Wu

In this study, we introduce Convolutional Transformer Neural Collaborative Filtering (CTNCF), a novel approach aimed at enhancing recommendation systems by effectively capturing high-order structural information in user-item interactions.…

Artificial Intelligence · Computer Science 2024-12-03 Pang Li , Shahrul Azman Mohd Noah , Hafiz Mohd Sarim

Graph-based collaborative filtering (CF) algorithms have gained increasing attention. Existing work in this literature usually models the user-item interactions as a bipartite graph, where users and items are two isolated node sets and…

Information Retrieval · Computer Science 2020-11-19 Zekun Li , Yujia Zheng , Shu Wu , Xiaoyu Zhang , Liang Wang