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• W3208686557 abstract "The formal equivalence between the Hopfield network (HN) and the Boltzmann Machine (BM) has been well established in the context of random, unstructured and unbiased patterns to be retrieved and recognised. Here we extend this equivalence to the case of “biased” patterns, that is patterns which display an unbalanced count of positive neurons/pixels: starting from previous results of the bias paradigm for the HN, we construct the BM’s equivalent Hamiltonian introducing a constraint parameter for the bias correction. We show analytically and numerically that the parameters suggested by equivalence are fixed points under contrastive divergence evolution when exposed to a dataset of blurred examples of each pattern, also enjoying large basins of attraction when the model suffers of a noisy initialisation. These results are also shown to be robust against increasing storage of the models, and increasing bias in the reference patterns. This picture, together with analytical derivation of HN’s phase diagram via self-consistency equations, allows us to enhance our mathematical control on BM’s performance when approaching more realistic datasets." @default.
• W3208686557 created "2021-11-08" @default.
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• W3208686557 date "2022-02-01" @default.
• W3208686557 modified "2023-09-24" @default.
• W3208686557 title "Storing, learning and retrieving biased patterns" @default.
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• W3208686557 doi "https://doi.org/10.1016/j.amc.2021.126716" @default.
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