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arXiv 2009.01730stat.MLcs.LG
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贝叶斯感知器:迈向完全贝叶斯神经网络

Bayesian Perceptron: Towards fully Bayesian Neural Networks

University of Stuttgart(斯图加特大学);Fraunhofer Institute for Manufacturing Engineering and Automation IPA(弗劳恩霍夫制造工程与自动化研究所)

Marco F. Huber

摘要:

人工神经网络(NN)已经成为机器学习中事实上的标准。它们允许在大量应用中学习高度非线性变换。然而,NN通常仅提供点估计,而没有系统地量化相应的不确定性。在本文中,提出了一种新的方法对完全贝叶斯神经网络,训练和预测的感知器内的贝叶斯推断框架内的封闭形式。感知器的权重和预测被认为是高斯随机变量。为常用的激活函数(如sigmoid或ReLU)提供了用于预测感知器输出和学习权重的分析表达式。这种方法不需要计算上昂贵的梯度计算,并进一步允许顺序学习。

英文摘要:

Artificial neural networks (NNs) have become the de facto standard in machine learning. They allow learning highly nonlinear transformations in a plethora of applications. However, NNs usually only provide point estimates without systematically quantifying corresponding uncertainties. In this paper a novel approach towards fully Bayesian NNs is proposed, where training and predictions of a perceptron are performed within the Bayesian inference framework in closed-form. The weights and the predictions of the perceptron are considered Gaussian random variables. Analytical expressions for predicting the perceptron's output and for learning the weights are provided for commonly used activation functions like sigmoid or ReLU. This approach requires no computationally expensive gradient calculations and further allows sequential learning.

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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