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arXiv 1301.2293cs.AI
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汇总学习到的概率信念

Aggregating Learned Probabilistic Beliefs

Stanford University(斯坦福大学)

Pedrito Maynard-Reid, Urszula Chajewska

摘要:

我们考虑的任务聚合的信念severalexperts。我们假设这些信念被表示为概率分布。我们认为,任何aggregationtechnique的评价取决于这个任务的语义上下文。我们提出了一个框架,在这个框架中,我们假设自然界从一个“真实”的分布中生成样本,不同的专家根据他们有机会观察到的数据子集形成他们的信念。自然,理想的总分布应该是从组合样本集中得到的。这样一个配方导致一个自然的方式来衡量的准确性的聚集mechanism.We表明,著名的聚集算子LinOP是理想地适合于这项任务。我们提出了一个基于LinOP的学习算法,灵感来自贝叶斯学习技术,它聚集了专家的分布表示为贝叶斯网络。我们的初步实验表明,该算法在实际中表现良好。

英文摘要:

We consider the task of aggregating beliefs of severalexperts. We assume that these beliefs are represented as probabilitydistributions. We argue that the evaluation of any aggregationtechnique depends on the semantic context of this task. We propose aframework, in which we assume that nature generates samples from a`true' distribution and different experts form their beliefs based onthe subsets of the data they have a chance to observe. Naturally, theideal aggregate distribution would be the one learned from thecombined sample sets. Such a formulation leads to a natural way tomeasure the accuracy of the aggregation mechanism.We show that the well-known aggregation operator LinOP is ideallysuited for that task. We propose a LinOP-based learning algorithm,inspired by the techniques developed for Bayesian learning, whichaggregates the experts' distributions represented as Bayesiannetworks. Our preliminary experiments show that this algorithmperforms well in practice.

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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