  In this paper, the task of cross-network node classification, which leverages
the abundant labeled nodes from a source network to help classify unlabeled
nodes in a target network, is studied. The existing domain adaptation
algorithms generally fail to model the network structural information, and the
current network embedding models mainly focus on single-network applications.
Thus, both of them cannot be directly applied to solve the cross-network node
classification problem. This motivates us to propose an adversarial
cross-network deep network embedding (ACDNE) model to integrate adversarial
domain adaptation with deep network embedding so as to learn network-invariant
node representations that can also well preserve the network structural
information. In ACDNE, the deep network embedding module utilizes two feature
extractors to jointly preserve attributed affinity and topological proximities
between nodes. In addition, a node classifier is incorporated to make node
representations label-discriminative. Moreover, an adversarial domain
adaptation technique is employed to make node representations
network-invariant. Extensive experimental results demonstrate that the proposed
ACDNE model achieves the state-of-the-art performance in cross-network node
classification.
