An Aligned Subtree Kernel for Weighted Graphs


Lu Bai, Luca Rossi, Zhihong Zhang, Edwin Hancock ;
Proceedings of the 32nd International Conference on Machine Learning, PMLR 37:30-39, 2015.


In this paper, we develop a new entropic matching kernel for weighted graphs by aligning depth-based representations. We demonstrate that this kernel can be seen as an \textbfaligned subtree kernel that incorporates explicit subtree correspondences, and thus addresses the drawback of neglecting the relative locations between substructures that arises in the R-convolution kernels. Experiments on standard datasets demonstrate that our kernel can easily outperform state-of-the-art graph kernels in terms of classification accuracy.

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