Statistically Efficient Greedy Equivalence Search

Statistically Efficient Greedy Equivalence Search
复制标题

统计上有效的贪婪等价搜索

DOI:
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发表时间:
2020
期刊:
Conference on Uncertainty in Artificial Intelligence
影响因子:
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通讯作者:
D. M. Chickering
D. M. Chickering
中科院分区:
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文献类型:
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作者:
D. M. Chickering

文献摘要

被引文献

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我们为贪婪等价搜索算法的统计有效变体建立了理论基础。如果生成结构中的每个节点最多有 k 个父节点,我们表明,在大数据的限制下,我们可以使用贪婪搜索来恢复该结构,并且运算符分数以最多 k 个变量为条件。我们提出了简单的综合实验,将新算法的仅向后变体与使用有限数据的 GES 进行比较,表明随着生成模型复杂性的增加,新算法的优势不断增加。
We establish the theoretical foundation for statistically efficient variants of the Greedy Equivalence Search algorithm. If each node in the generative structure has at most k parents, we show that in the limit of large data, we can recover that structure using greedy search with operator scores that condition on at most k variables. We present simple synthetic experiments that compare a backward-only variant of the new algorithm to GES using finite data, showing increasing benefit of the new algorithm as the complexity of the generative model increases.