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arXiv 1001.1079cs.LG
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测量潜在因果结构

Measuring Latent Causal Structure

University College London(伦敦大学学院)

Ricardo Silva

摘要:

发现观察世界的潜在表征在数据分析中变得越来越重要。大部分的努力集中在建立潜在的变量,可用于预测问题,如分类和回归。从数据中学习潜在结构的一个相关目标是识别哪些隐藏的共同原因生成观察结果,例如在需要预测政策效果的应用中。这将是我们的贡献所解决的主要问题:给定一个假设由未知和不可测量的共同原因产生的指标数据集,我们希望发现哪些隐藏的共同原因是这些原因,以及它们如何产生我们的数据。这是可能的假设下,观察到的变量是线性函数的潜在原因加性噪声。文献中的先前结果提出了每个观测变量是单个潜变量的噪声函数的情况下的解决方案。我们将展示如何扩展现有的结果,在某些情况下,观测变量测量一个以上的潜变量。

英文摘要:

Discovering latent representations of the observed world has become increasingly more relevant in data analysis. Much of the effort concentrates on building latent variables which can be used in prediction problems, such as classification and regression. A related goal of learning latent structure from data is that of identifying which hidden common causes generate the observations, such as in applications that require predicting the effect of policies. This will be the main problem tackled in our contribution: given a dataset of indicators assumed to be generated by unknown and unmeasured common causes, we wish to discover which hidden common causes are those, and how they generate our data. This is possible under the assumption that observed variables are linear functions of the latent causes with additive noise. Previous results in the literature present solutions for the case where each observed variable is a noisy function of a single latent variable. We show how to extend the existing results for some cases where observed variables measure more than one latent variable.

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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