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arXiv 1702.08549math.OC
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有限域上一维任意类属函数极小化的一个算法

An algorithm for minimization of arbitrary generic functions in one dimension over a finite domain

Glauco Masotti

摘要:

本文详细地描述了一维极小化的一种新算法,并给出了一些实例的测试结果。该方法只需要准时计算的功能,并适用于“困难”的情况下,即当函数是高度不规则的,并有多个次优的局部极小值。该算法使用二次或三次插值和黄金分割的间隔作为最后的手段。它在几个方面对Brent方法及类似方法进行了改进。它管理多个局部极小值,考虑到必须处理有限域而不是无限域的复杂性,并且在大多数情况下收敛速度稍快。

英文摘要:

A new algorithm for one-dimensional minimization is described in detail and the results of some tests on practical cases are reported and illustrated. The method requires only punctual computation of the function, and is suitable to be applied in "difficult" cases, that is when the function is highly irregular and has multiple sub-optimal local minima. The algorithm uses quadratic or cubic interpolation and subdivision of intervals in golden ratio as a last resort. It improves over Brent's method and similar ones in several aspects. It manages multiple local minima, takes into account the complications of having to deal with a finite domain, rather than an unlimited one, and has a slightly faster convergence in most cases.

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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