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• W3182036650 abstract "Restricted Boltzmann machines (RBM) are bilayer neural networks used for the unsupervised learning of model distributions from data. The bipartite architecture of RBM naturally defines an elegant sampling procedure, called alternating Gibbs sampling (AGS), where the configurations of the latent-variable layer are sampled conditional to the data-variable layer and vice versa. We study here the performance of AGS on several analytically tractable models borrowed from statistical mechanics. We show that standard AGS is not more efficient than classical Metropolis-Hastings (MH) sampling of the effective energy landscape defined on the data layer. However, RBM can identify meaningful representations of training data in their latent space. Furthermore, using these representations and combining Gibbs sampling with the MH algorithm in the latent space can enhance the sampling performance of the RBM when the hidden units encode weakly dependent features of the data. We illustrate our findings on three datasets: Bars and Stripes and MNIST, well known in machine learning, and the so-called lattice proteins dataset, introduced in theoretical biology to study the sequence-to-structure mapping in proteins." @default.
• W3182036650 created "2021-07-19" @default.
• W3182036650 creator A5016002177 @default.
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• W3182036650 date "2021-09-07" @default.
• W3182036650 modified "2023-10-11" @default.
• W3182036650 title "Barriers and dynamical paths in alternating Gibbs sampling of restricted Boltzmann machines" @default.
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• W3182036650 doi "https://doi.org/10.1103/physreve.104.034109" @default.
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• W3182036650 hasPublicationYear "2021" @default.
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