Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. node2coords: Graph Representation Learning with Wasserstein Barycenters
 
research article

node2coords: Graph Representation Learning with Wasserstein Barycenters

Simou, Effrosyni  
•
Thanou, Dorina  
•
Frossard, Pascal  
January 1, 2021
Ieee Transactions On Signal And Information Processing Over Networks

In order to perform network analysis tasks, representations that capture the most relevant information in the graph structure are needed. However, existing methods learn representations that cannot be interpreted in a straightforward way and that are relatively unstable to perturbations of the graph structure. We address these two limitations by proposing node2coords, a representation learning algorithm for graphs, which learns simultaneously a low-dimensional space and coordinates for the nodes in that space. The patterns that span the low dimensional space reveal the graph's most important structural information. The coordinates of the nodes reveal the proximity of their local structure to the graph structural patterns. We measure this proximity with Wasserstein distances that permit to take into account the properties of the underlying graph. Therefore, we introduce an autoencoder that employs a linear layer in the encoder and a novel Wasserstein barycentric layer at the decoder. Node connectivity descriptors, which capture the local structure of the nodes, are passed through the encoder to learn a small set of graph structural patterns. In the decoder, the node connectivity descriptors are reconstructed as Wasserstein barycenters of the graph structural patterns. The optimal weights for the barycenter representation of a node's connectivity descriptor correspond to the coordinates of that node in the low-dimensional space. Experimental results demonstrate that the representations learned with node2coords are interpretable, lead to node embeddings that are stable to perturbations of the graph structure and achieve competitive or superior results compared to state-of-the-art unsupervised methods in node classification.

  • Details
  • Metrics
Type
research article
DOI
10.1109/TSIPN.2020.3041940
Web of Science ID

WOS:000604831900001

Author(s)
Simou, Effrosyni  
•
Thanou, Dorina  
•
Frossard, Pascal  
Date Issued

2021-01-01

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Published in
Ieee Transactions On Signal And Information Processing Over Networks
Volume

7

Start page

17

End page

29

Subjects

Engineering, Electrical & Electronic

•

Telecommunications

•

Engineering

•

decoding

•

signal processing algorithms

•

information processing

•

unsupervised learning

•

task analysis

•

histograms

•

prediction algorithms

•

graph representation learning

•

node embeddings

•

wasserstein barycenters

•

optimal transport

•

information

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTS4  
Available on Infoscience
March 26, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/176220
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés