Results 11 to 20 of about 2,499,483 (247)

The sophisticated architecture of the rat atrioventricular node [PDF]

open access: yes, 2005
In the mammalian heart, the action potential spontaneously generated in the sinoatrial (SA) node propagates through the atria to reach the atrioventricular (AV) node.
Yoo, Shin
core   +7 more sources

Unsupervised Graph Representation Learning With Variable Heat Kernel

open access: yesIEEE Access, 2020
Graph representation learning aims to learn a low-dimension latent representation of nodes, and the learned representation is used for downstream graph analysis tasks. However, most of the existing graph embedding models focus on how to aggregate all the
Yongjun Jing   +4 more
doaj   +1 more source

GATSMOTE: Improving Imbalanced Node Classification on Graphs via Attention and Homophily

open access: yesMathematics, 2022
In recent decades, non-invasive neuroimaging techniques and graph theories have enabled a better understanding of the structural patterns of the human brain at a macroscopic level.
Yongxu Liu, Zhi Zhang, Yan Liu, Yao Zhu
doaj   +1 more source

Robust cross-network node classification via constrained graph mutual information

open access: yes, 2022
The recent methods for cross-network node classification mainly exploit graph neural networks (GNNs) as feature extractor to learn expressive graph representations across the source and target graphs.
Yang, Shuiqiao   +6 more
core   +1 more source

ESA-GCN: An Enhanced Graph-Based Node Classification Method for Class Imbalance Using ENN-SMOTE Sampling and an Attention Mechanism

open access: yesApplied Sciences, 2023
In recent years, graph neural networks (GNNs) have achieved great success in handling node classification tasks. However, as data explosively grows in various industries, the problem of class imbalance becomes increasingly severe.
Liying Zhang, Haihang Sun
doaj   +1 more source

Imbalanced Node Classification Beyond Homophilic Assumption

open access: yes, 2023
Imbalanced node classification widely exists in real-world networks where graph neural networks (GNNs) are usually highly inclined to majority classes and suffer from severe performance degradation on classifying minority class nodes.
Wang, G   +5 more
core   +1 more source

One Node at a Time: Node-Level Network Classification [PDF]

open access: yes, 2022
Network classification aims to group networks (or graphs) into distinct categories based on their structure. We study the connection between classification of a network and of its constituent nodes, and whether nodes from networks in different groups are
Mucha, Peter J.   +2 more
core   +1 more source

CE-Net: A Coordinate Embedding Network for Mismatching Removal

open access: yesIEEE Access, 2021
Mismatching removal is at the core yet still a challenging problem in the photogrammetry and computer vision field. In this paper, we propose a coordinate embedding network (named CE-Net).
Shiyu Chen   +5 more
doaj   +1 more source

Joint Use of Node Attributes and Proximity for Node Classification [PDF]

open access: yes, 2022
Node classification aims to infer unknown node labels from known labels and other node attributes. Standard approaches for this task assume homophily, whereby a node’s label is predicted from the labels of other nodes nearby in the network.
Merchant, Arpit   +3 more
core   +1 more source

Semi-AttentionAE: An Integrated Model for Graph Representation Learning

open access: yesIEEE Access, 2021
Graph embedding learns low-dimensional vector representations which capture and preserve information in original graphs. Common shallow neural networks and deep autoencoder only use adjacency matrix as input, and usually ignore node attributes and ...
Lining Yuan   +3 more
doaj   +1 more source

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