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arXiv 1507.02801stat.MLcs.ITcs.LGmath.IT
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自适应混合因子分析器

Adaptive Mixtures of Factor Analyzers

Namık Kemal University(纳米克·凯末尔大学);Boğaziçi University(博阿齐奇大学)

Heysem Kaya, Albert Ali Salah

摘要:

混合因子分析器是一种半参数密度估计器,它通过允许混合中的每个高斯在不同的低维流形中表示来推广众所周知的高斯混合模型。本文提出了一种鲁棒的、简约的模型选择算法,用于训练混合因子分析器,同时进行聚类和局部线性、全局非线性降维。该算法允许每个混合成分有不同数量的因子,使模型复杂度适应数据复杂度。我们比较了所提出的算法与相关的自动模型选择算法在一些基准。实验结果表明,该方法在聚类、流形学习和类条件建模等方面都是有效的。

英文摘要:

A mixture of factor analyzers is a semi-parametric density estimator that generalizes the well-known mixtures of Gaussians model by allowing each Gaussian in the mixture to be represented in a different lower-dimensional manifold. This paper presents a robust and parsimonious model selection algorithm for training a mixture of factor analyzers, carrying out simultaneous clustering and locally linear, globally nonlinear dimensionality reduction. Permitting different number of factors per mixture component, the algorithm adapts the model complexity to the data complexity. We compare the proposed algorithm with related automatic model selection algorithms on a number of benchmarks. The results indicate the effectiveness of this fast and robust approach in clustering, manifold learning and class-conditional modeling.

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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