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arXiv 1902.00792stat.MLcs.LG
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连续型效用函数的变分贝叶斯决策

Variational Bayesian Decision-making for Continuous Utilities

Helsinki Institute for Information Technology HIIT(赫尔辛基信息技术研究所 HIIT);University of Helsinki(赫尔辛基大学)

Tomasz Kuśmierczyk, Joseph Sakaya, Arto Klami

摘要:

贝叶斯决策理论概述了一个严格的框架,使最佳决策的基础上最大限度地提高预期效用的模型后验。然而,从业者往往没有获得完整的后验和诉诸近似推理策略。在这种情况下,在执行推理时考虑最终的决策任务允许校准后验近似以最大化效用。我们提出了一个自动流水线,co-opts连续效用到变分推断算法,占决策。我们提供了实用的策略,近似和最大化的增益,并根据经验证明一致的改进时,校准近似特定的实用程序。

英文摘要:

Bayesian decision theory outlines a rigorous framework for making optimal decisions based on maximizing expected utility over a model posterior. However, practitioners often do not have access to the full posterior and resort to approximate inference strategies. In such cases, taking the eventual decision-making task into account while performing the inference allows for calibrating the posterior approximation to maximize the utility. We present an automatic pipeline that co-opts continuous utilities into variational inference algorithms to account for decision-making. We provide practical strategies for approximating and maximizing the gain, and empirically demonstrate consistent improvement when calibrating approximations for specific utilities.

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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