Backbone Structure of Hairy Memory

Cheng-Yuan LiouDepartment of Computer Science and Information EngineeringNational Taiwan University

ICANN 2006, Greece

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Discussions Patterns in {N_i,p & N_i,n} are backbones of the Hopfield mo

del. They form the backbone structure of the model.

Hairy model is a homeostatic system.

All four methods, et-AM, e-AM, g-AM, and b-AM, derive asymmetric weight matrices with nonzero diagonal elements and keep Hebb’s postulate.

In almost all of our simulations, the evolution of states converged in a single iteration (basin-1) during recall after learning. This is very different from the evolutionary recall process in many other models.

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Discussions

All three methods, et-AM, e-AM, and g-AM, operate in one shift.

Each hyperplane is adjusted in turn. Each iteration improves the location of a single hyperplane. Each hyperplane is independent of all others during learning.

Localizing neuron damages Localizing learning

The computational cost is linearly proportional to the network size, N, and the number of patterns, P.

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Discussions

All of the methods, et-AM, e-AM, g-AM and b-AM give non-zero values to the self-connections, wii \= 0, which is very different from Hopfield’s setting, wii = 0.

We are still attempting to understand and clarify the meaning of the setting wii = 0, where newborn neurons start learning from full self-reference, wii = 1, and end with whole network-reference, wii = 0.

This is beneficial for cultured neurons working as a whole. This implies that stabilizing memory might not be the only purpose of learning and evolution

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Discussions

The Boltzmann machine can be designed according to et-AM, e-AM, or g-AM.

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