Neural Nets: A Theory for Brains and Machines by Armando Freitas da Rocha (auth.)

By Armando Freitas da Rocha (auth.)

The objective of this booklet is to enhance neural nets as a robust idea for either brains and machines. the speculation is built in shut correlation with the biology of the neuron and the homes of human reasoning. This strategy implies the subsequent: - Updating the biology of the artificialneuron. The neurosciences have skilled a massive improvement within the final 50 years. one of many major reasons of the current paintings is toincorporate this information right into a powerful version of the bogus neuron. specific awareness is dedicated to formalizing the advanced chemical procedures on the synaptic point. This formal language helps either symbolicreasoning and uncertainty processing. - Investigating the homes of professional reasoning. this sort of reasoning is approximate, partial and non-monotonic, and as a result calls for exact mathematical instruments for its formalization, reminiscent of fuzzy set concept and fuzzy common sense. 3 diversified clever structures constructed with this expertise are awarded and discussed.

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By Armando Freitas da Rocha (auth.)

The objective of this booklet is to enhance neural nets as a robust idea for either brains and machines. the speculation is built in shut correlation with the biology of the neuron and the homes of human reasoning. This strategy implies the subsequent: - Updating the biology of the artificialneuron. The neurosciences have skilled a massive improvement within the final 50 years. one of many major reasons of the current paintings is toincorporate this information right into a powerful version of the bogus neuron. specific awareness is dedicated to formalizing the advanced chemical procedures on the synaptic point. This formal language helps either symbolicreasoning and uncertainty processing. - Investigating the homes of professional reasoning. this sort of reasoning is approximate, partial and non-monotonic, and as a result calls for exact mathematical instruments for its formalization, reminiscent of fuzzy set concept and fuzzy common sense. 3 diversified clever structures constructed with this expertise are awarded and discussed.

Show description

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The role of this enzyme is to accelerate the conversion of ATP into ADP. This conversion results in the release of one energized atom of phosphor. This energy is transferred to the membrane, m o d i f y i n g the state of the ionic channels. The consequence is in many cases the change of the membrane excitability without any noticeable electrical activity at the p o s t - s y n a p t i c cell. The importance of this type of synapsis, called m o d u l a t o r synapsis, is to control the various parameters of the function in eqs.

The capacity of this code was estimated to be around 4 to 5 bits in the case of the slow adapting stretching organ of the Crayfish (Rocha, unpublished results). In this line of reasoning, it is possible to assume that the axonic spike firing encodes ~p(s) in the close interval [0,1] with the precision specified by the capacity h(C) of its code. This is the same approach used in the computers, where the precision is dependent on the size of the words manipulated by the central processing unit. FIG.

R is a family of subsets Ri of receptors specialized in binding different pre-synaptic transmitters ti. Also, the electrical response Vo induced by the activation of r 9 Ri depends on their distribution in the post-synaptic membrane; on the type of receptor and on the dynamics of the binding tar (eqs. 8). Thus, each subset Ri represents a possible pattern of activation of nj (Fig. 6), and its actual activation represents the degree of matching ~(w,R) between this pattern and the pre-synaptic activity w (eq.

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