Instabilities in Associative Memory Model with Synaptic Depression and Switching Phenomena among Attractors
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概要
- 論文の詳細を見る
We investigated how the stability of macroscopic states in the associative memory model is affected by synaptic depression. To this model, we applied the dynamical mean-field theory, which has recently been developed in stochastic neural network models with synaptic depression. By introducing a sublattice method, we derived macroscopic equations for firing state variables and depression variables. By using the macroscopic equations, we obtained the phase diagram when the strength of synaptic depression and the correlation level among stored patterns were changed. We found that there is an unstable region in which both the memory state and mixed state cannot be stable and that various switching phenomena can occur in this region.
- Physical Society of Japanの論文
- 2010-08-15
著者
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Masato Okada
Graduate School Of Frontier Science The University Of Tokyo|brain Science Institute Riken|japan Scie
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Oizumi Masafumi
Graduate School Of Frontier Sciences The University Of Tokyo
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Nagata Kenji
Graduate School of Frontier Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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Otsubo Yosuke
Graduate School of Frontier Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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Masato Okada
Graduate School of Frontier Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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Masafumi Oizumi
Graduate School of Frontier Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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Nagata Kenji
Graduate School of Frontier Science, The University of Tokyo
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