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arXiv 0710.4082math.NAcs.NA
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关于 $\ell_1$ 惩罚泛函最小化算法的性能

On the performance of algorithms for the minimization of $\ell_1$-penalized functionals

Vrije Universiteit Brussel(布鲁塞尔自由大学)

Ignace Loris

AI总结:

本文通过引入“近似等时线”准则,测试并比较了五种迭代最小化算法和两种热启动策略在 $\ell_1$ 惩罚最小二乘泛函最小化中的性能,并突出了良态与病态问题的差异。

摘要:

研究了用于在一系列惩罚参数下最小化 $\ell_1$ 惩罚最小二乘泛函的算法的性能评估问题。引入了一个使用“近似等时线”思想的准则。测试并比较了五种不同的迭代最小化算法以及两种热启动策略。比较中使用了良态和病态问题,并突出了这两类问题之间的对比。

英文摘要:

The problem of assessing the performance of algorithms used for the minimization of an $\ell_1$-penalized least-squares functional, for a range of penalty parameters, is investigated. A criterion that uses the idea of `approximation isochrones' is introduced. Five different iterative minimization algorithms are tested and compared, as well as two warm-start strategies. Both well-conditioned and ill-conditioned problems are used in the comparison, and the contrast between these two categories is highlighted.

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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