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arXiv 1408.2803cs.LG
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通过最小化VC维度上的精确界限来学习超平面分类器

Learning a hyperplane classifier by minimizing an exact bound on the VC dimension

Indian Institute of Technology, Delhi(印度理工学院德里分校)

Jayadeva

摘要:

VC维度量学习机的能力,低VC维导致良好的泛化。虽然支持向量机产生最先进的学习性能,但众所周知,支持向量机的VC维可以是无界的;尽管在实践中效果良好,但不能保证良好的泛化能力。在本文中,我们展示了如何学习一个超平面分类器,通过最小化一个确切的,或\boldmath{$Θ$}约束的VC维。所提出的方法,称为最小复杂性机(MCM),涉及解决一个简单的线性规划问题。实验结果表明,在一些基准数据集上,该方法学习分类器的出错率远低于传统的SVM,而往往使用较少的支持向量。在许多基准数据集上,支持向量的数量不到SVM使用的数量的十分之一,这表明MCM确实学习了更简单的表示。

英文摘要:

The VC dimension measures the capacity of a learning machine, and a low VC dimension leads to good generalization. While SVMs produce state-of-the-art learning performance, it is well known that the VC dimension of a SVM can be unbounded; despite good results in practice, there is no guarantee of good generalization. In this paper, we show how to learn a hyperplane classifier by minimizing an exact, or \boldmath{$Θ$} bound on its VC dimension. The proposed approach, termed as the Minimal Complexity Machine (MCM), involves solving a simple linear programming problem. Experimental results show, that on a number of benchmark datasets, the proposed approach learns classifiers with error rates much less than conventional SVMs, while often using fewer support vectors. On many benchmark datasets, the number of support vectors is less than one-tenth the number used by SVMs, indicating that the MCM does indeed learn simpler representations.

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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