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Functional magnetic resonance imaging (fMRI) is one of the most common imaging modalities to investigate brain functions. Recent studies in neuroscience stress the great potential of functional brain networks constructed from fMRI data for…

机器学习 · 计算机科学 2022-05-31 Xuan Kan , Hejie Cui , Joshua Lukemire , Ying Guo , Carl Yang

Graph neural networks (GNNs) often struggle to learn discriminative node representations for heterophilic graphs, where connected nodes tend to have dissimilar labels and feature similarity provides weak structural cues. We propose…

机器学习 · 计算机科学 2025-12-30 Ayushman Raghuvanshi , Gonzalo Mateos , Sundeep Prabhakar Chepuri

Federated learning (FL) based magnetic resonance (MR) image reconstruction can facilitate learning valuable priors from multi-site institutions without violating patient's privacy for accelerating MR imaging. However, existing methods rely…

图像与视频处理 · 电气工程与系统科学 2023-05-11 Juan Zou , Cheng Li , Ruoyou Wu , Tingrui Pei , Hairong Zheng , Shanshan Wang

Self-supervised learning (SSL) of graph neural networks is emerging as a promising way of leveraging unlabeled data. Currently, most methods are based on contrastive learning adapted from the image domain, which requires view generation and…

机器学习 · 计算机科学 2022-07-12 Yaochen Xie , Zhao Xu , Shuiwang Ji

Human brains exhibit highly organized multiscale neurophysiological dynamics. Understanding those dynamic changes and the neuronal networks involved is critical for understanding how the brain functions in health and disease. Functional…

神经元与认知 · 定量生物学 2024-09-09 Manuel Morante , Kristian Frølich , Naveed ur Rehman

Insufficiency of training data is a persistent issue in medical image analysis, especially for task-based functional magnetic resonance images (fMRI) with spatio-temporal imaging data acquired using specific cognitive tasks. In this paper,…

图像与视频处理 · 电气工程与系统科学 2023-08-31 Jiyao Wang , Nicha C. Dvornek , Lawrence H. Staib , James S. Duncan

Graph representation learning (GRL) makes considerable progress recently, which encodes graphs with topological structures into low-dimensional embeddings. Meanwhile, the time-consuming and costly process of annotating graph labels manually…

机器学习 · 计算机科学 2024-02-28 Haojun Jiang , Jiawei Sun , Jie Li , Chentao Wu

In medical image segmentation, supervised deep networks' success comes at the cost of requiring abundant labeled data. While asking domain experts to annotate only one or a few of the cohort's images is feasible, annotating all available…

计算机视觉与模式识别 · 计算机科学 2021-10-06 Devavrat Tomar , Behzad Bozorgtabar , Manana Lortkipanidze , Guillaume Vray , Mohammad Saeed Rad , Jean-Philippe Thiran

We present a novel frequency-based Self-Supervised Learning (SSL) approach that significantly enhances its efficacy for pre-training. Prior work in this direction masks out pre-defined frequencies in the input image and employs a…

计算机视觉与模式识别 · 计算机科学 2025-04-01 Amin Karimi Monsefi , Mengxi Zhou , Nastaran Karimi Monsefi , Ser-Nam Lim , Wei-Lun Chao , Rajiv Ramnath

Supervised deep learning needs a large amount of labeled data to achieve high performance. However, in medical imaging analysis, each site may only have a limited amount of data and labels, which makes learning ineffective. Federated…

图像与视频处理 · 电气工程与系统科学 2022-04-26 Yawen Wu , Dewen Zeng , Zhepeng Wang , Yiyu Shi , Jingtong Hu

Graph hypernetworks (GHNs), constructed by combining graph neural networks (GNNs) with hypernetworks (HNs), leverage relational data across various domains such as neural architecture search, molecular property prediction and federated…

机器学习 · 计算机科学 2024-06-03 Bao Nguyen , Lorenzo Sani , Xinchi Qiu , Pietro Liò , Nicholas D. Lane

Semantic communication can significantly improve bandwidth utilization in wireless systems by exploiting the meaning behind raw data. However, the advancements achieved through semantic communication are closely dependent on the development…

Supervised deep learning needs a large amount of labeled data to achieve high performance. However, in medical imaging analysis, each site may only have a limited amount of data and labels, which makes learning ineffective. Federated…

图像与视频处理 · 电气工程与系统科学 2022-08-09 Yawen Wu , Dewen Zeng , Zhepeng Wang , Yiyu Shi , Jingtong Hu

Self-Supervised Learning (SSL) has been shown to learn useful and information-preserving representations. Neural Networks (NNs) are widely applied, yet their weight space is still not fully understood. Therefore, we propose to use SSL to…

机器学习 · 计算机科学 2022-12-15 Konstantin Schürholt , Dimche Kostadinov , Damian Borth

Graph Convolutional Networks (GCNs) have been successfully applied to analyze non-grid data, where the classical convolutional neural networks (CNNs) cannot be directly used. One similarity shared by GCNs and CNNs is the requirement of…

计算机视觉与模式识别 · 计算机科学 2020-06-04 Qikui Zhu , Bo Du , Pingkun Yan

Graph Neural Networks (GNNs) have emerged as a powerful tool to learn from graph-structured data. A paramount example of such data is the brain, which operates as a network, from the micro-scale of neurons, to the macro-scale of regions.…

机器学习 · 计算机科学 2022-11-17 Ahmed ElGazzar , Rajat Thomas , Guido van Wingen

Recommender systems are widely deployed in various web environments, and self-supervised learning (SSL) has recently attracted significant attention in this field. Contrastive learning (CL) stands out as a major SSL paradigm due to its…

信息检索 · 计算机科学 2025-01-17 Yu Zhang , Lei Sang , Yi Zhang , Yiwen Zhang , Yun Yang

Self-Supervised Learning (SSL) has become a prominent approach for acquiring visual representations across various tasks, yet its application in fine-grained visual recognition (FGVR) is challenged by the intricate task of distinguishing…

计算机视觉与模式识别 · 计算机科学 2024-07-23 Zihu Wang , Lingqiao Liu , Scott Ricardo Figueroa Weston , Samuel Tian , Peng Li

Graph neural networks (GNNs) have demonstrated success in learning representations of brain graphs derived from functional magnetic resonance imaging (fMRI) data. However, existing GNN methods assume brain graphs are static over time and…

机器学习 · 计算机科学 2023-07-11 Alexander Campbell , Antonio Giuliano Zippo , Luca Passamonti , Nicola Toschi , Pietro Lio

The search for new high-performance organic semiconducting molecules is challenging due to the vastness of the chemical space, machine learning methods, particularly deep learning models like graph neural networks (GNNs), have shown…

化学物理 · 物理学 2021-12-06 Zaixi Zhang , Qi Liu , Shengyu Zhang , Chang-Yu Hsieh , Liang Shi , Chee-Kong Lee