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arXiv 1402.0480cs.LGstat.ML
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基于贝叶斯网与神经网转换的高效推理

Efficient Gradient-Based Inference through Transformations between Bayes Nets and Neural Nets

University of Amsterdam(阿姆斯特丹大学)

Diederik P. Kingma, Max Welling

摘要:

分层贝叶斯网络和具有随机隐藏单元的神经网络通常被认为是两种不同类型的模型。我们表明,这些类型的模型中的任何一个通常可以转换成另一个的实例,通过在潜在变量的中心和可微非中心参数化之间切换。参数化的选择极大地影响了基于梯度的后验推理的效率,我们表明,它们往往是互补的,我们澄清时,每个参数化的首选,并显示如何推断可以鲁棒。在非中心形式中,可以使用边际似然的简单Monte Carlo估计来学习参数。理论结果得到了实验的支持。

英文摘要:

Hierarchical Bayesian networks and neural networks with stochastic hidden units are commonly perceived as two separate types of models. We show that either of these types of models can often be transformed into an instance of the other, by switching between centered and differentiable non-centered parameterizations of the latent variables. The choice of parameterization greatly influences the efficiency of gradient-based posterior inference; we show that they are often complementary to eachother, we clarify when each parameterization is preferred and show how inference can be made robust. In the non-centered form, a simple Monte Carlo estimator of the marginal likelihood can be used for learning the parameters. Theoretical results are supported by experiments.

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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