Artificial neural network: Difference between revisions

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'''Artificial Neural Network''' (ANN for short) is a processing model inspired on the biological neural networks. Artificial neural networks are composed by simple nodes called [[artificial neuron|artificial neurons]] and the processing behavior is stored in the node interconnections as ''weights''.
'''Artificial Neural Networks''' (ANNs for short) are a connectionist processing model inspired on the biological neural networks. Artificial neural networks are composed by simple nodes called [[artificial neuron|artificial neurons]], in which the processing behavior is stored in the node interconnections as values called ''weights'', which represent the strength of each neural connection, obtained after processing a sequence of patterns.


==Adaptation and Learning==
==Adaptation and Learning==
When a neuron receives and processes an input signal, it changes its behavior by changing its threshold and/or weight values, modifying the network. Since artificial neurons have a predictable behavior, artificial neural networks can be trained by being fed with sequences of inputs, often determined by certain functions which are parts of several algorithms. Besides, there are neural networks which do not require training.
When a neuron receives and processes an input signal, it changes the '''weight''' value assigned to the input received. The weighted signals are summed to form the activation value, which is filtered by a function called '''transfer function'''. Changes in a specific neuron's behavior produces changes in the entire neural network, and this is basically how the neural networks learn.


==See also==
==See also==

Revision as of 02:46, 5 July 2007

Artificial Neural Networks (ANNs for short) are a connectionist processing model inspired on the biological neural networks. Artificial neural networks are composed by simple nodes called artificial neurons, in which the processing behavior is stored in the node interconnections as values called weights, which represent the strength of each neural connection, obtained after processing a sequence of patterns.

Adaptation and Learning

When a neuron receives and processes an input signal, it changes the weight value assigned to the input received. The weighted signals are summed to form the activation value, which is filtered by a function called transfer function. Changes in a specific neuron's behavior produces changes in the entire neural network, and this is basically how the neural networks learn.

See also