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arXiv 2106.15239cs.LG
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生成图完形:核正则图表示学习

Generating the Graph Gestalt: Kernel-Regularized Graph Representation Learning

Kiarash Zahirnia, Ankita Sakhuja, Oliver Schulte, Parmis Nadaf, Ke Li, Xia Hu

摘要:

最近的工作图生成模型已经取得了显着的进展,越来越逼真的图形,如测量的全球图形功能,如度分布,密度和聚类系数。深度生成模型也通过更好地建模图拓扑中的局部相关性取得了重大进展,这对于预测未观察到的图组件非常有用,例如从附近观察到的图组件中存在链接或节点类。对图形数据的完整科学理解应该同时解决全局和局部结构。在本文中,我们提出了一个联合模型,两者作为互补的目标,图VAE框架。全局结构是通过将图形内核的概率模型,其损失函数是密切相关的重建和输入图形的全局结构之间的最大平均差异(MMD)。ELBO目标从模型中导出正则化一个标准的本地链路重建项与MMD项。我们的实验证明了显着的改善,在现实中生成的图形结构,通常由1-2个数量级的图形结构指标相比,领先的图形VAE和GAN模型。在许多情况下,本地链路重建也会得到改善。

英文摘要:

Recent work on graph generative models has made remarkable progress towards generating increasingly realistic graphs, as measured by global graph features such as degree distribution, density, and clustering coefficients. Deep generative models have also made significant advances through better modelling of the local correlations in the graph topology, which have been very useful for predicting unobserved graph components, such as the existence of a link or the class of a node, from nearby observed graph components. A complete scientific understanding of graph data should address both global and local structure. In this paper, we propose a joint model for both as complementary objectives in a graph VAE framework. Global structure is captured by incorporating graph kernels in a probabilistic model whose loss function is closely related to the maximum mean discrepancy(MMD) between the global structures of the reconstructed and the input graphs. The ELBO objective derived from the model regularizes a standard local link reconstruction term with an MMD term. Our experiments demonstrate a significant improvement in the realism of the generated graph structures, typically by 1-2 orders of magnitude of graph structure metrics, compared to leading graph VAEand GAN models. Local link reconstruction improves as well in many cases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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