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arXiv 2009.04372cs.LGstat.ML
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基于专家建议的平移和尺度不变预测的广义在线算法

A Generalized Online Algorithm for Translation and Scale Invariant Prediction with Expert Advice

Kaan Gokcesu, Hakan Gokcesu

摘要:

在这项工作中,我们的目标是创建一个完全在线的算法框架,用于预测专家的建议,这是无预警和无尺度的专家损失。我们的目标是创建一个通用的算法,适用于各种各样的应用程序。为了这个目的,我们研究了我们的算法对一个通用的竞争类在顺序预测专家咨询问题的预期遗憾,其中预期遗憾的措施之间的差异,我们的预测算法的损失和损失的“最好的”专家选择策略的竞争。我们设计我们的算法使用的普遍预测的角度来竞争对一个指定的类的专家选择策略,这不一定是一个固定的专家选择。类的专家选择策略,我们要竞争,纯粹是由手头的具体应用程序,是左通用,这使得我们的广义算法适用于许多不同的问题。我们表明,我们的算法和它的性能界限,这是二阶,表示在平方损失的总和方面的损失序列是不需要的初步知识。我们的后悔界限在任意缩放和转换损失时是稳定的。

英文摘要:

In this work, we aim to create a completely online algorithmic framework for prediction with expert advice that is translation-free and scale-free of the expert losses. Our goal is to create a generalized algorithm that is suitable for use in a wide variety of applications. For this purpose, we study the expected regret of our algorithm against a generic competition class in the sequential prediction by expert advice problem, where the expected regret measures the difference between the losses of our prediction algorithm and the losses of the 'best' expert selection strategy in the competition. We design our algorithm using the universal prediction perspective to compete against a specified class of expert selection strategies, which is not necessarily a fixed expert selection. The class of expert selection strategies that we want to compete against is purely determined by the specific application at hand and is left generic, which makes our generalized algorithm suitable for use in many different problems. We show that no preliminary knowledge about the loss sequence is required by our algorithm and its performance bounds, which are second order, expressed in terms of sums of squared losses. Our regret bounds are stable under arbitrary scalings and translations of the losses.

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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