# LUP Student Papers - Lund University Publications

Geodetisk och fotogrammetrisk mätnings- och - DocPlayer.se

Generalized Hopfield Neural Network (GHNN) is a continuous time single layer feedback network. Figure.1 shows the block diagram of the proposed method. For the given normalized fundamental output, voltage the GHNN block is used to calculate the switching instants. Retrieval phase diagrams in the asymmetric Sherrington-Kirkpatrick model and in the Little-Hopfield model Yu-qiang Ma, Yue-ming Zhang, and Chang-de Gong Phys.

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model of McCulloch and Pitts [38], the Rosenblatt perceptron [42], … Restricted Boltzmann Machines are described by the Gibbs measure of a bipartite spin glass, which in turn corresponds to the one of a generalised Hopfield network. This equivalence allows us to characterise the state of these systems in terms of retrieval capabilities, at both low and high load. We study the paramagnetic-spin glass and the spin glass-retrieval phase transitions, as the pattern 2018-02-20 3. Application to the models This section shows the phase diagrams of the Hamiltonian (3).

## Lyman alfa-skogen - Yumpu

Book chapters. See Chapter 17 Section 2 for an introduction to Hopfield networks.. Python classes.

### analog information — Engelska översättning - TechDico

13.1 Synchronous and asynchronous networks A relevant issue for the correct design of recurrent neural networks is the ad-equate synchronization of the computing elements. In the case of McCulloch- A Hopfield network (or Ising model of a neural network or Ising–Lenz–Little model) is a form of recurrent artificial neural network popularized by John Hopfield in 1982, but described earlier by Little in 1974 based on Ernst Ising's work with Wilhelm Lenz. Let us compare this result with the phase diagram of the standard Hopfield model calculated in a replica symmetric approximation [5,11]. Again we have three phases. For temperatures above the broken line T SG , there exist paramagnetic solutions characterized by m = q = 0, while below the broken line, spin glass solutions, m = 0 but q = 0, exist. Figure 2: Phase portrait of 2-neuron Hopfield Network.

Ionospheric model:. av H Malmgren · Citerat av 7 — In the learning phase the activity in the resonant layer mirrors input. At each moment p¾ en modell av ett neuralt nätverk, presentera en enkel (och i m¾nga av4 seenden Ur diagrammet och eller tabellen i figur 3 kan man bland annat utläsa att Och därmed är vi nästan framme vid Hopfields konvergensbevis. Detta.

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We find for the noiseless zero-temperature case that this non-monotonic Hopfield network can store more patterns than a network with monotonic transfer function investigated by Amit et al. Properties of retrieval phase 1992-09-01 T − α phase diagram for the spherical Hopfield model. Full (dashed) lines indicate discontinuous (continuous) transitions: T SG describes the spin glass transition and T R (19)-(20) indicates 2017-02-20 PHASE DIAGRAM OF RESTRICTED BOLTZMANN MACHINES AND GENERALISED HOPFIELD NETWORKS WITH ARBITRARY PRIORS ADRIANOBARRA,GIUSEPPEGENOVESE,PETERSOLLICH,ANDDANIELETANTARI Abstract. model of McCulloch and Pitts [38], the Rosenblatt perceptron [42], … Restricted Boltzmann Machines are described by the Gibbs measure of a bipartite spin glass, which in turn corresponds to the one of a generalised Hopfield network. This equivalence allows us to characterise the state of these systems in terms of retrieval capabilities, at both low and high load. We study the paramagnetic-spin glass and the spin glass-retrieval phase transitions, as the pattern 2018-02-20 3.

sign) for mapping the coupling strength on the Hopfield model
Let us compare this result with the phase diagram of the standard Hopfield model calculated in a replica symmetric approximation [5,11]. Again we have three phases. For temperatures above the broken line T SG , there exist paramagnetic solutions characterized by m = q = 0, while below the broken line, spin glass solutions, m = 0 but q = 0, exist. We investigate the retrieval phase diagrams of an asynchronous fully-connected attractor network with non-monotonic transfer function by means of a mean-field approximation. We find for the noiseless zero-temperature case that this non-monotonic Hopfield network can store more patterns than a network with monotonic transfer function investigated by Amit et al.

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We investigate the retrieval phase diagrams of an asynchronous fully-connected attractor network with non-monotonic transfer function by means of a mean-field which leads to a phase diagram. The effective retarded self-interaction usually appearing in symmetric models is here found to vanish, which causes a significantly enlarged storage capacity of eYe ~ 0.269. com pared to eYe ~ 0.139 for Hopfield networks s~oring static patterns. Our The phase diagram coincides very accurately with that of the conventional classical Hopfield model if we replace the temperature T in the latter model by $\Delta$. 1992-11-01 We investigate the retrieval phase diagrams of an asynchronous fully connected attractor network with non-monotonic transfer function by means of a mean-field approximation.

We investigate the retrieval phase diagrams of an asynchronous fully-connected attractor network with non-monotonic transfer function by means of a mean-field approximation. We find for the noiseless zero-temperature case that this non-monotonic Hopfield network can store more patterns than a network with monotonic transfer function investigated by Amit et al. Properties of retrieval phase
Phase diagram with the paramagnetic (P), spin-glass (SG), and retrieval (R) regions of the soft model with a spherical constraint on the σ layer for different Ω σ and fixed Ω τ = δ = 1. The area of the retrieval region shrinks exponentially as Ω σ is increased from 0. Reuse & Permissions ×
1996-04-11 · Title: Retrieval Phase Diagrams of Non-monotonic Hopfield Networks Authors: Jun-ichi Inoue (Department of Physics, Tokyo Institute of Technology and RIKEN) (Submitted on 11 Apr 1996 ( v1 ), last revised 25 Aug 1997 (this version, v2))
we propose an open quantum generalisation of the Hopfield neural network, the simplest toy model of associative memory. We determine its phase diagram and show that quantum fluctuations give rise to a qualitatively new non-equilibrium phase. This novel phase is characterised by limit cycles
Figure 9.

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### Download Download PDF - Ornis Svecica

Hopfield networks serve as content-addressable ("associative") memory systems with binary threshold nodes. A Hopfield network is a simple assembly of perceptrons that is able to overcome the XOR problem (Hopfield, 1982 ).