Hybrid Embedding via Cross-layer Random Walks on Multiplex Networks

Benyun SHI, Jianan Zhong, Hongjun Qiu, Qing Bao, Kai Liu, Jiming LIU

Research output: Contribution to journalArticlepeer-review


Node embedding aims to encode network nodes as a set of low-dimensional vectors while preserving certain structural properties of the network. In recent years, extensive studies have been conducted to preserve network communities, i.e., structural proximity of network nodes. However, few of them have focused on preserving the structural equivalence of network nodes, which describes the similarity of structural roles between network nodes. In this paper, we focus on a hybrid network embedding problem of how to flexibly and simultaneously preserve both structural proximity and equivalence. Here, we introduce the concept of graphlet degree vector (GDV) to describe structure roles of network nodes, and further measure structural equivalence based on their similarity. Specifically, we capture both structural proximity and equivalence by building a multiplex network, where both unsupervised and semi-supervised cross-layer random walk (CL-Walk) methods are implemented. By carrying out experiments on both synthetic and real-world datasets, we evaluate the performance of the proposed CL-Walk methods for the tasks of node clustering, node classification, and label prediction. The experimental results indicate that the CL-Walk method outperforms several state-of-the-art methods when both structural proximity and structural equivalence are relevant to specific network analytic task.

Original languageEnglish
Article number9408418
Pages (from-to)1815-1827
Number of pages13
JournalIEEE Transactions on Network Science and Engineering
Issue number2
Publication statusPublished - 2021

Scopus Subject Areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Computer Networks and Communications

User-Defined Keywords

  • Complex networks
  • Computer science
  • Cross-layer random walks
  • Feature extraction
  • Graphlet degree vector
  • Multiplex networks
  • Multiplexing
  • Network embedding
  • Social networking (online)
  • Structural equivalence
  • Structural proximity
  • Task analysis
  • Topology


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