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research article

OrthoNet: Multilayer Network Data Clustering

El Gheche, Mireille  
•
Chierchia, Giovanni
•
Frossard, Pascal  
January 1, 2020
Ieee Transactions On Signal And Information Processing Over Networks

Network data appears in very diverse applications, like biological, social, or sensor networks. Clustering of network nodes into categories or communities has thus become a very common task in machine learning and data mining. Network data comes with some information about the network edges. In some cases, this network information can even be given with multiple views or layers, each one representing a different type of relationship between the network nodes. Increasingly often, network nodes also carry a feature vector. We propose in this paper to extend the node clustering problem, that commonly considers only the network information, to a problem where both the network information and the node features are considered together for learning a clustering-friendly representation of the feature space. Specifically, we design a generic two-step algorithm for multilayer network data clustering. The first step aggregates the different layers of network information into a graph representation given by the geometric mean of the network Laplacian matrices. The second step uses a neural net to learn a feature embedding that is consistent with the structure given by the network layers. We propose a novel algorithm for efficiently training the neural net via gradient descent, which encourages the neural net outputs to span the leading eigenvectors of the aggregated Laplacian matrix, in order to capture the pairwise interactions on the network, and provide a clustering-friendly representation of the feature space. We demonstrate with an extensive set of experiments on synthetic and real datasets that our method leads to a significant improvement w.r.t. state-of-the-art multilayer graph clustering algorithms, as it judiciously combines nodes features and network information in the node embedding algorithms.

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Type
research article
DOI
10.1109/TSIPN.2020.2970313
Web of Science ID

WOS:000519076600001

Author(s)
El Gheche, Mireille  
Chierchia, Giovanni
Frossard, Pascal  
Date Issued

2020-01-01

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

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

6

Start page

13

End page

23

Subjects

Engineering, Electrical & Electronic

•

Telecommunications

•

Engineering

•

Telecommunications

•

multilayer graph

•

multiview network

•

spd manifold

•

spectral clustering

•

unsupervised learning

•

community structure

•

algorithms

•

graph

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTS4  
Available on Infoscience
March 25, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/167636
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