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arXiv 2102.09006math.OC
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两层规划凸算法的差分及其在超参数选择中的应用

Difference of convex algorithms for bilevel programs with applications in hyperparameter selection

Jane J. Ye, Xiaoming Yuan, Shangzhi Zeng, Jin Zhang

摘要:

本文给出了求解上层目标函数为凸函数的差,下层为全凸的双层规划的凸差分算法。这类非平凡的二层程序提供了一个强大的建模框架,用于处理机器学习中超参数选择的应用程序。由于下层规划的全凸性,下层规划的值函数也是凸的,因此可以将二层规划转化为凸二层规划的差分。本文提出了两个求解凸规划重式差分的算法,并在很小的假设下证明了它们的收敛性。最后对支持向量机的二层分类模型进行了数值实验。

英文摘要:

In this paper, we present difference of convex algorithms for solving bilevel programs in which the upper level objective functions are difference of convex functions, and the lower level programs are fully convex. This nontrivial class of bilevel programs provides a powerful modelling framework for dealing with applications arising from hyperparameter selection in machine learning. Thanks to the full convexity of the lower level program, the value function of the lower level program turns out to be convex and hence the bilevel program can be reformulated as a difference of convex bilevel program. We propose two algorithms for solving the reformulated difference of convex program and show their convergence under very mild assumptions. Finally we conduct numerical experiments to a bilevel model of support vector machine classification.

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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