<pedrocorreia.net ⁄>
 

<AI : Neural Network for beginners (Part 2 of 3) ⁄ >




clicks: 2912 2912 2006-11-27 2006-11-27 goto tecnologia myNews tecnologia  Bookmark This Bookmark This


This article is part 2 of a series of 3 articles that I am going to post. The proposed article content will be as follows:

1. Part 1 : This one, will be an introduction into Perceptron networks (single layer neural networks)
2. Part 2 : Will be about multi layer neural networks, and the back propogation training method to solve a non linear classification problem such as the logic of an XOR logic gate. This is something that a Perceptron can't do. This is explained further within this article
3. Part 3 : Will be about how to use a genetic algorithm (GA) to train a multi layer neural network to solve some logic problem

Summary

This article will show how to use a multi-layer neural network to solve the XOR logic problem.
A Brief Recap ( From part 1 of 3)

Before we commence with the nitty gritty of this new article which deals wtih multi layer Neural Networks, let just revisit a few key concepts. If you haven't read article1, perhaps you should start there.

Perceptron Configuration ( Single layer network)

The inputs (x1,x2,x3..xm) and connection weights (w1,w2,w3..wm) shown below are typically real values, both positive (+) and negative (-).

The perceptron itself, consists of weights, the summation processor, and an activation function, and an adjustable threshold processor (called bias here after).

For convenience the normal practice is to treat the bias, as just another input. The following diagram illustrates the revised configuration.



este é só um excerto do artigo, para aceder ao artigo completo, clique no link em baixo:
this is just a small excerpt from the article, to access the full article please click in the link below:

http://www.codeproject.com/useritems/Backprop_ANN.asp




Subscribe News RSS  Subscribe News Updates by E-mail





myNews <myNews show="rand" cat="tecnologia" ⁄>

MongoDb Architecture new ...

NOSQL has become a very heated topic for large web-scale deployment where scalability and semi-struc (...)

clicks: 17900 17900 2012-05-14 2012-05-14 goto url (new window) horicky.blogspo... goto myNews tecnologia


A Hopefully Fair and Useful Comparison of Haskell Web Frameworks new ...

Recently there has been a lot of discussion and questions about the differences between the big thre (...)

clicks: 14447 14447 2012-05-13 2012-05-13 goto url (new window) softwaresimply.... goto myNews tecnologia


Retina graphics for your website new ...

retina.js is an open source script that makes it easy to serve high-resolution images to devices wit (...)

clicks: 14283 14283 2012-05-11 2012-05-11 goto url (new window) retinajs.com/ goto myNews tecnologia


What every programmer should know about memory, Part 1 new ...

In the early days computers were much simpler. The various components of a system, such as the CPU, (...)

clicks: 15636 15636 2012-05-10 2012-05-10 goto url (new window) lwn.net/Article... goto myNews tecnologia


The State Of HTML5 Video

HTML5 has entered the online video market, which is both exciting and challenging for developers in (...)

clicks: 6198 6198 2012-02-14 2012-02-14 goto url (new window) longtailvideo.c... goto myNews tecnologia


A Tour of Amazon's DynamoDB

Amazon's recent release of DynamoDB, a database whose name is inspired by Dynamo, the key-value data (...)

clicks: 5896 5896 2012-02-13 2012-02-13 goto url (new window) paperplanes.de/... goto myNews tecnologia


Video: CSS3 Secrets: 10 things you might not know about CSS3

A number of prominent front-end developers delivered helpful talks at this year's Fronteers 2011 con (...)

clicks: 6440 6440 2011-11-30 2011-11-30 goto url (new window) css.dzone.com/a... goto myNews tecnologia


Google BigQuery Service: Big data analytics at Google speed

Rapidly crunching terabytes of big data can lead to better business decisions, but this has traditio (...)

clicks: 5546 5546 2011-11-30 2011-11-30 goto url (new window) googlecode.blog... goto myNews tecnologia