Oops I Took A Gradient: Scalable Sampling for Discrete Distributions
Oops I Took A Gradient: Scalable Sampling for Discrete Distributions
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糟糕,我采用了梯度:离散分布的可扩展采样
DOI:
10.1111/rssa.12630
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
Chris J. Maddison
中科院分区:
文献类型:
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作者:
Will Grathwohl;Kevin Swersky;Milad Hashemi;D. Duvenaud;Chris J. Maddison
We propose a general and scalable approximate sampling strategy for probabilistic models with discrete variables. Our approach uses gradients of the likelihood function with respect to its discrete inputs to propose updates in a Metropolis-Hastings sampler. We show empirically that this approach outperforms generic samplers in a number of difficult settings including Ising models, Potts models, restricted Boltzmann machines, and factorial hidden Markov models. We also demonstrate the use of our improved sampler for training deep energy-based models on high dimensional discrete data. This approach outperforms variational auto-encoders and existing energy-based models. Finally, we give bounds showing that our approach is near-optimal in the class of samplers which propose local updates.
DOI:
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发表时间:
2020-03
期刊:
ArXiv
影响因子:
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作者:
Jun Han;Fan Ding;Xianglong Liu;L. Torresani;Jian Peng;Qiang Liu
通讯作者:
Jun Han;Fan Ding;Xianglong Liu;L. Torresani;Jian Peng;Qiang Liu
DOI:
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发表时间:
2019-07
期刊:
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影响因子:
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作者:
Yang Song;Stefano Ermon
通讯作者:
Yang Song;Stefano Ermon