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Contrastive learning methods have attracted considerable attention due to their remarkable success in analyzing graph-structured data. Inspired by the success of contrastive learning, we propose a novel framework for contrastive…

Machine Learning · Computer Science 2023-06-21 Xiaojuan Zhang , Jun Fu , Shuang Li

Cognitive diagnosis (CD) utilizes students' existing studying records to estimate their mastery of unknown knowledge concepts, which is vital for evaluating their learning abilities. Accurate CD is extremely challenging because CD is…

Machine Learning · Computer Science 2024-11-05 Fulai Yang , Di Wu , Yi He , Li Tao , Xin Luo

Anomaly detection is one of the most active research areas in various critical domains, such as healthcare, fintech, and public security. However, little attention has been paid to scholarly data, i.e., anomaly detection in a citation…

Machine Learning · Computer Science 2022-02-24 Jiaying Liu , Feng Xia , Xu Feng , Jing Ren , Huan Liu

In-Context Learning (ICL) is an important paradigm for adapting Large Language Models (LLMs) to downstream tasks through a few demonstrations. Despite the great success of ICL, the limitation of the demonstration number may lead to…

Computation and Language · Computer Science 2024-01-10 Caoyun Fan , Jidong Tian , Yitian Li , Hao He , Yaohui Jin

Unsupervised graph representation learning aims to learn low-dimensional node embeddings without supervision while preserving graph topological structures and node attributive features. Previous graph neural networks (GNN) require a large…

Machine Learning · Computer Science 2020-09-04 Yanqiao Zhu , Yichen Xu , Feng Yu , Shu Wu , Liang Wang

We explore the problem of Incremental Generalized Category Discovery (IGCD). This is a challenging category incremental learning setting where the goal is to develop models that can correctly categorize images from previously seen…

Computer Vision and Pattern Recognition · Computer Science 2023-12-11 Bingchen Zhao , Oisin Mac Aodha

Semi-supervised learning (SSL) provides a powerful framework for leveraging unlabeled data when labels are limited or expensive to obtain. SSL algorithms based on deep neural networks have recently proven successful on standard benchmark…

Machine Learning · Computer Science 2019-05-28 Jiaxing Wang , Yin Zheng , Xiaoshuang Chen , Junzhou Huang , Jian Cheng

Graph clustering, which involves the partitioning of nodes within a graph into disjoint clusters, holds significant importance for numerous subsequent applications. Recently, contrastive learning, known for utilizing supervisory…

Machine Learning · Computer Science 2024-11-05 Yunhui Liu , Xinyi Gao , Tieke He , Tao Zheng , Jianhua Zhao , Hongzhi Yin

One important desideratum of lifelong learning aims to discover novel classes from unlabelled data in a continuous manner. The central challenge is twofold: discovering and learning novel classes while mitigating the issue of catastrophic…

Artificial Intelligence · Computer Science 2024-03-07 Guangyao Chen , Peixi Peng , Yangru Huang , Mengyue Geng , Yonghong Tian

In open-world scenarios, Generalized Category Discovery (GCD) requires identifying both known and novel categories within unlabeled data. However, existing methods often suffer from prototype confusion caused by shortcut learning, which…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Kailin Lyu , Jianwei He , Long Xiao , Jianing Zeng , Liang Fan , Lin Shu , Jie Hao

Neural networks have proven to be effective at solving machine learning tasks but it is unclear whether they learn any relevant causal relationships, while their black-box nature makes it difficult for modellers to understand and debug…

Machine Learning · Computer Science 2023-08-02 Fabrizio Russo , Francesca Toni

Selective classification enables models to make predictions only when they are sufficiently confident, aiming to enhance safety and reliability, which is important in high-stakes scenarios. Previous methods mainly use deep neural networks…

Machine Learning · Computer Science 2024-06-10 Yu-Chang Wu , Shen-Huan Lyu , Haopu Shang , Xiangyu Wang , Chao Qian

Generalized Category Discovery (GCD) is a classification task that aims to classify both base and novel classes in unlabeled images, using knowledge from a labeled dataset. In GCD, previous research overlooks scene information or treats it…

Computer Vision and Pattern Recognition · Computer Science 2025-03-19 Zhengyuan Peng , Jinpeng Ma , Zhimin Sun , Ran Yi , Haichuan Song , Xin Tan , Lizhuang Ma

Recent works in self-supervised learning have advanced the state-of-the-art by relying on the contrastive learning paradigm, which learns representations by pushing positive pairs, or similar examples from the same class, closer together…

Machine Learning · Computer Science 2022-06-27 Jeff Z. HaoChen , Colin Wei , Adrien Gaidon , Tengyu Ma

Uncovering cause-effect relationships from observational time series is fundamental to understanding complex systems. While many methods infer static causal graphs, real-world systems often exhibit dynamic causality-where relationships…

Machine Learning · Computer Science 2025-11-06 Tingzhu Bi , Yicheng Pan , Xinrui Jiang , Huize Sun , Meng Ma , Ping Wang

Neural Collapse (NC) gives a precise description of the representations of classes in the final hidden layer of classification neural networks. This description provides insights into how these networks learn features and generalize well…

Machine Learning · Computer Science 2023-08-08 Liam Parker , Emre Onal , Anton Stengel , Jake Intrater

Scene graph parsing aims to detect objects in an image scene and recognize their relations. Recent approaches have achieved high average scores on some popular benchmarks, but fail in detecting rare relations, as the highly long-tailed…

Computer Vision and Pattern Recognition · Computer Science 2020-10-06 He Huang , Shunta Saito , Yuta Kikuchi , Eiichi Matsumoto , Wei Tang , Philip S. Yu

Novelty detection is the process of determining whether a query example differs from the learned training distribution. Previous methods attempt to learn the representation of the normal samples via generative adversarial networks (GANs).…

Computer Vision and Pattern Recognition · Computer Science 2021-06-21 Chengwei Chen , Yuan Xie , Shaohui Lin , Ruizhi Qiao , Jian Zhou , Xin Tan , Yi Zhang , Lizhuang Ma

Models trained for classification often assume that all testing classes are known while training. As a result, when presented with an unknown class during testing, such closed-set assumption forces the model to classify it as one of the…

Computer Vision and Pattern Recognition · Computer Science 2019-04-03 Poojan Oza , Vishal M Patel

Class distribution mismatch (CDM) refers to the discrepancy between class distributions in training data and target tasks. Previous methods address this by designing classifiers to categorize classes known during training, while grouping…

Computer Vision and Pattern Recognition · Computer Science 2025-05-13 Pan Du , Wangbo Zhao , Xinai Lu , Nian Liu , Zhikai Li , Chaoyu Gong , Suyun Zhao , Hong Chen , Cuiping Li , Kai Wang , Yang You