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arXiv 2202.02145cs.LGcs.AIstat.ML
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复杂数据的生成式建模

Generative Modeling of Complex Data

Luca Canale, Nicolas Grislain, Grégoire Lothe, Johan Leduc

摘要:

近年来,一些模型已经提高了生成合成表格数据集的能力。然而,这样的模型专注于合成简单的列表,并且不能用于具有复杂结构的真实数据。本文提出了一个通用的框架来综合更复杂的复合和嵌套类型的数据结构。然后,它提出了一个实际的实现,建立因果Transformers,结构(类型的映射)和列表(类型的重复实例)。标准基准数据集上的结果表明,这种实现在机器学习效用和统计相似性方面始终优于当前最先进的模型。此外,它在两个具有多个嵌套和稀疏数据的复杂层次数据集上显示了非常强大的结果,这是以前无法实现的。

英文摘要:

In recent years, several models have improved the capacity to generate synthetic tabular datasets. However, such models focus on synthesizing simple columnar tables and are not useable on real-life data with complex structures. This paper puts forward a generic framework to synthesize more complex data structures with composite and nested types. It then proposes one practical implementation, built with causal transformers, for struct (mappings of types) and lists (repeated instances of a type). The results on standard benchmark datasets show that such implementation consistently outperforms current state-of-the-art models both in terms of machine learning utility and statistical similarity. Moreover, it shows very strong results on two complex hierarchical datasets with multiple nesting and sparse data, that were previously out of reach.

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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