arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.4127cs.LG
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根据专家评估建议进行预测

Prediction with expert evaluators' advice

Alexey Chernov, Vladimir Vovk

摘要:

我们引入了一个新的协议,预测与专家的意见,每个专家评估学习者和他自己的性能使用的损失函数,可能会随着时间的推移而改变,并可能是不同的损失函数使用的其他专家。学习者的目标是表现得比每个专家更好或不差很多,由该专家评估,同时为所有专家。如果专家使用的损失函数都是适当的评分规则和所有的混合,我们表明,防御性预测算法享有相同的性能保证,可达到的聚集算法在标准设置和已知是最佳的。这一结果也适用于“专家”(或“睡眠”)专家的情况。在这种情况下,防御性预测算法简化为聚合算法的简单修改。

英文摘要:

We introduce a new protocol for prediction with expert advice in which each expert evaluates the learner's and his own performance using a loss function that may change over time and may be different from the loss functions used by the other experts. The learner's goal is to perform better or not much worse than each expert, as evaluated by that expert, for all experts simultaneously. If the loss functions used by the experts are all proper scoring rules and all mixable, we show that the defensive forecasting algorithm enjoys the same performance guarantee as that attainable by the Aggregating Algorithm in the standard setting and known to be optimal. This result is also applied to the case of "specialist" (or "sleeping") experts. In this case, the defensive forecasting algorithm reduces to a simple modification of the Aggregating Algorithm.

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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