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arXiv 2106.01474stat.MLcs.LG
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通过结构化、监督和生成对抗学习测试有向无环图

Testing Directed Acyclic Graph via Structural, Supervised and Generative Adversarial Learning

London School of Economics and Political Science(伦敦政治经济学院);University of California at Berkeley(加州大学伯克利分校)

Chengchun Shi, Yunzhe Zhou, Lexin Li

AI总结:

本文提出一种基于神经网络的DAG假设检验方法,允许非线性关联和时间相关数据,并提供了渐近保证,通过模拟和大脑连接网络分析验证了有效性。

摘要:

在本文中,我们提出了一种新的有向无环图(DAG)假设检验方法。尽管存在丰富的DAG估计方法类别,但DAG推断解决方案相对匮乏。此外,现有方法通常施加某些特定的模型结构,如线性模型或加性模型,并假设数据观测是独立的。相反,我们提出的检验允许随机变量之间的关联是非线性的,且数据是时间相关的。我们基于一些高度灵活的神经网络学习器构建了该检验。我们建立了该检验的渐近保证,同时允许受试者数量或每个受试者的时间点数量发散至无穷大。我们通过模拟和大脑连接网络分析证明了该检验的有效性。

英文摘要:

In this article, we propose a new hypothesis testing method for directed acyclic graph (DAG). While there is a rich class of DAG estimation methods, there is a relative paucity of DAG inference solutions. Moreover, the existing methods often impose some specific model structures such as linear models or additive models, and assume independent data observations. Our proposed test instead allows the associations among the random variables to be nonlinear and the data to be time-dependent. We build the test based on some highly flexible neural networks learners. We establish the asymptotic guarantees of the test, while allowing either the number of subjects or the number of time points for each subject to diverge to infinity. We demonstrate the efficacy of the test through simulations and a brain connectivity network analysis.

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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