Artificial neural networks technology. DACS report by DARPA Neural Network Study (U.S.)

By DARPA Neural Network Study (U.S.)

Show description

Read Online or Download Artificial neural networks technology. DACS report PDF

Best genetics books

Population Genetics for Animal Conservation (Conservation Biology)

It's broadly authorized between conservation biologists that genetics is, greater than ever, a vital and effective software for wild and captive inhabitants administration and reserve layout. in spite of the fact that, a real synergy among inhabitants genetics and conservation biology is missing. Following the 1st overseas Workshop on inhabitants Genetics for Animal Conservation in 2003, the medical committee felt that, given the worldwide urgency of animal conservation, it was once primary that discussions on the convention have been made obtainable to graduate scholars and flora and fauna managers.

Psychiatric Genetics (Review of Psychiatry)

Psychiatric Genetics is a concise reference that offers the complexities of this dynamic box in a sincerely written, simply available layout, with various tables and illustrations. Ten professional participants supply a desirable view of psychiatric genetics in a textual content that's thorough and scholarly but additionally succinct and available.

Additional resources for Artificial neural networks technology. DACS report

Example text

The network contains an input layer which has as many elements as there are separable parameters needed to describe the objects to be classified. It has a pattern layer, which organizes the training set such that each input vector is represented by an individual processing element. And finally, the network contains an output layer, called the summation layer, which has as many processing elements as there are classes to be recognized. Each element in this layer combines via processing elements within the pattern layer which relate to the same class and prepares 46 that category for output.

The learning rule is the Hopfield Law, where connections are increased when both the input and output of an Hopfield element are the same and the connection weights are decreased if the output does not match the input. Obviously, any non-binary implementation of the network must have a threshold mechanism in the transfer function, or matching input-output pairs could be too rare to train the network properly. The Hopfield network has two major limitations when used as a content addressable memory.

These factors play a significant role in determining how long it will take to train a network. Changing any one of these factors may either extend the training time to an unreasonable length or even result in an unacceptable accuracy. 28 Most learning functions have some provision for a learning rate, or learning constant. Usually this term is positive and between zero and one. If the learning rate is greater than one, it is easy for the learning algorithm to overshoot in correcting the weights, and the network will oscillate.

Download PDF sample

Rated 4.29 of 5 – based on 3 votes

About the Author