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arXiv 1708.06008cs.NE
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玻尔兹曼机和能量模型

Boltzmann machines and energy-based models

Takayuki Osogami

摘要:

我们回顾玻尔兹曼机和基于能量的模型。玻尔兹曼机定义了二进制值模式的概率分布。人们可以通过基于梯度的方法以增加数据的对数似然性的方式来学习玻尔兹曼机的参数。玻尔兹曼机的梯度和海森函数有着漂亮的数学表示,尽管计算它们通常很难。这种棘手的动机近似的方法,包括吉布斯采样器和对比发散,和易于处理的替代品,即基于能量的模型。

英文摘要:

We review Boltzmann machines and energy-based models. A Boltzmann machine defines a probability distribution over binary-valued patterns. One can learn parameters of a Boltzmann machine via gradient based approaches in a way that log likelihood of data is increased. The gradient and Hessian of a Boltzmann machine admit beautiful mathematical representations, although computing them is in general intractable. This intractability motivates approximate methods, including Gibbs sampler and contrastive divergence, and tractable alternatives, namely energy-based models.

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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