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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…

信息检索 · 计算机科学 2023-07-12 Yonghui Yang , Zhengwei Wu , Le Wu , Kun Zhang , Richang Hong , Zhiqiang Zhang , Jun Zhou , Meng Wang

Contrastive learning has revolutionized the field of computer vision, learning rich representations from unlabeled data, which generalize well to diverse vision tasks. Consequently, it has become increasingly important to explain these…

计算机视觉与模式识别 · 计算机科学 2023-12-15 Fawaz Sammani , Boris Joukovsky , Nikos Deligiannis

Counterfactual explanation is one branch of interpretable machine learning that produces a perturbation sample to change the model's original decision. The generated samples can act as a recommendation for end-users to achieve their desired…

机器学习 · 计算机科学 2023-03-28 Tri Dung Duong , Qian Li , Guandong Xu

Recently, contrastive learning has been shown to be effective in improving pre-trained language models (PLM) to derive high-quality sentence representations. It aims to pull close positive examples to enhance the alignment while push apart…

计算与语言 · 计算机科学 2022-05-03 Kun Zhou , Beichen Zhang , Wayne Xin Zhao , Ji-Rong Wen

Inspired by the impressive success of contrastive learning (CL), a variety of graph augmentation strategies have been employed to learn node representations in a self-supervised manner. Existing methods construct the contrastive samples by…

机器学习 · 计算机科学 2022-12-14 Peiyao Zhao , Yuangang Pan , Xin Li , Xu Chen , Ivor W. Tsang , Lejian Liao

We present a collaborative learning method called Mutual Contrastive Learning (MCL) for general visual representation learning. The core idea of MCL is to perform mutual interaction and transfer of contrastive distributions among a cohort…

计算机视觉与模式识别 · 计算机科学 2022-01-19 Chuanguang Yang , Zhulin An , Linhang Cai , Yongjun Xu

Sequential recommendation is one of the important branches of recommender system, aiming to achieve personalized recommended items for the future through the analysis and prediction of users' ordered historical interactive behaviors.…

信息检索 · 计算机科学 2024-05-09 Zeyu Hu , Yuzhi Xiao , Tao Huang , Xuanrong Huo

Self-supervised learning has recently achieved great success in representation learning without human annotations. The dominant method -- that is contrastive learning, is generally based on instance discrimination tasks, i.e., individual…

计算机视觉与模式识别 · 计算机科学 2022-12-06 Chen Feng , Ioannis Patras

Traditional supervised learning with deep neural networks requires a tremendous amount of labelled data to converge to a good solution. For 3D medical images, it is often impractical to build a large homogeneous annotated dataset for a…

Because implicit user feedback for the collaborative filtering (CF) models is biased toward popular items, CF models tend to yield recommendation lists with popularity bias. Previous studies have utilized inverse propensity weighting (IPW)…

信息检索 · 计算机科学 2023-05-23 Jae-woong Lee , Seongmin Park , Mincheol Yoon , Jongwuk Lee

Contrastive learning (CL) has emerged as a promising technique for improving recommender systems, addressing the challenge of data sparsity by using self-supervised signals from raw data. Integration of CL with graph convolutional network…

信息检索 · 计算机科学 2024-08-23 Jeongwhan Choi , Hyowon Wi , Chaejeong Lee , Sung-Bae Cho , Dongha Lee , Noseong Park

Multi-behavioral recommendation optimizes user experiences by providing users with more accurate choices based on their diverse behaviors, such as view, add to cart, and purchase. Current studies on multi-behavioral recommendation mainly…

信息检索 · 计算机科学 2024-04-19 Shunpan Liang , Junjie Zhao , Chen Li , Yu Lei

Contrastive learning predicts whether two images belong to the same category by training a model to make their feature representations as close or as far away as possible. In this paper, we rethink how to mine samples in contrastive…

计算机视觉与模式识别 · 计算机科学 2023-11-02 Hengkui Dong , Xianzhong Long , Yun Li

Contrastive learning (CL) has achieved astonishing progress in computer vision, speech, and natural language processing fields recently with self-supervised learning. However, CL approach to the supervised setting is not fully explored,…

计算与语言 · 计算机科学 2022-05-23 Zhenyu Zhang , Yuming Zhao , Meng Chen , Xiaodong He

Sequential recommendation methods play a pivotal role in modern recommendation systems. A key challenge lies in accurately modeling user preferences in the face of data sparsity. To tackle this challenge, recent methods leverage contrastive…

信息检索 · 计算机科学 2024-04-18 Shaowei Wei , Zhengwei Wu , Xin Li , Qintong Wu , Zhiqiang Zhang , Jun Zhou , Lihong Gu , Jinjie Gu

Recently, self-supervised contrastive learning has achieved great success on various tasks. However, its underlying working mechanism is yet unclear. In this paper, we first provide the tightest bounds based on the widely adopted assumption…

机器学习 · 计算机科学 2025-11-06 Qi Zhang , Yifei Wang , Yisen Wang

Recent methods for learning unsupervised visual representations, dubbed contrastive learning, optimize the noise-contrastive estimation (NCE) bound on mutual information between two views of an image. NCE uses randomly sampled negative…

机器学习 · 计算机科学 2020-10-06 Mike Wu , Milan Mosse , Chengxu Zhuang , Daniel Yamins , Noah Goodman

As trustworthy AI continues to advance, the fairness issue in recommendations has received increasing attention. A recommender system is considered unfair when it produces unequal outcomes for different user groups based on user-sensitive…

人工智能 · 计算机科学 2024-10-24 Wei Chen , Meng Yuan , Zhao Zhang , Ruobing Xie , Fuzhen Zhuang , Deqing Wang , Rui Liu

Contrastive learning has proven instrumental in learning unbiased representations of data, especially in complex environments characterized by high-cardinality and high-dimensional sensitive information. However, existing approaches within…

机器学习 · 计算机科学 2024-11-25 Stefan K. Nielsen , Tan M. Nguyen

Representation learning has significantly been developed with the advance of contrastive learning methods. Most of those methods have benefited from various data augmentations that are carefully designated to maintain their identities so…

计算机视觉与模式识别 · 计算机科学 2022-01-24 Xiao Wang , Guo-Jun Qi