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arXiv 2006.04633cs.LGstat.ML
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你所有的损失都属于贝叶斯

All your loss are belong to Bayes

CSIRO Data61(联邦科学与工业研究组织 Data61);The Australian National University(澳大利亚国立大学)

Christian Walder, Richard Nock

摘要:

损失函数是机器学习的基石,也是大多数算法的起点。在过去的几十年里,统计学和贝叶斯决策理论通过适当性,在监督学习中引出了一系列广泛的可接受损失,其中最流行的选择属于(logistic,Square,Matsushita等)。最近,在训练模型本身的同时,人们努力将损失适应手头的领域,而不是对损失进行可能有偏见的临时选择。关键的方法适合一个典型的链接,一个函数,单调相关的封闭单位区间R,并可以通过积分提供适当的损失。在本文中,我们依赖于一个更广泛的观点,适当的复合损失和最近的构造,从信息几何,源函数,其拟合简化所面临的规范链接的约束。我们引入了一个技巧平方高斯过程,以获得一个随机过程,其路径是兼容的源函数,具有许多理想的属性,在链接估计的上下文中。实验结果表明,在本领域的国家有很大的改善。

英文摘要:

Loss functions are a cornerstone of machine learning and the starting point of most algorithms. Statistics and Bayesian decision theory have contributed, via properness, to elicit over the past decades a wide set of admissible losses in supervised learning, to which most popular choices belong (logistic, square, Matsushita, etc.). Rather than making a potentially biased ad hoc choice of the loss, there has recently been a boost in efforts to fit the loss to the domain at hand while training the model itself. The key approaches fit a canonical link, a function which monotonically relates the closed unit interval to R and can provide a proper loss via integration. In this paper, we rely on a broader view of proper composite losses and a recent construct from information geometry, source functions, whose fitting alleviates constraints faced by canonical links. We introduce a trick on squared Gaussian Processes to obtain a random process whose paths are compliant source functions with many desirable properties in the context of link estimation. Experimental results demonstrate substantial improvements over the state of the art.

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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