please dont rip this site

Neural Networks vs Genetic Algorithms

This is not a valid comparison: Neural Networks are a system for simulating neurons and Genetic Algorithms are a means of adjusting any system by selecting attributes of prior settings based on highest performance and some random mutation. You can, for example, use a GA to adjust the weights in a NN.

The better comparison is GA versus Gradient Descent. And NN vs CMAC.

In both GA and GD, there must be some objective measure of how well the system is doing. In the case of a GD, you must also know which direction to adjust the system to improve it's performance. With a GA, you don't need to know that, but improvement is far slower. It's still better than purely random adjustments, because you are using "parents" who have the best performance out of a population. As long as some characteristic of the systems makes some better than others, and those characteristics can be selected into a new generation, then a method of selecting the helpful characteristics can be found. GD "converges" (improve) faster because they require direction about which way to correct; "should it move this way, or that to be better?"

NN use a series of nodes to sum activation levels multiplied by weights from all the nodes in a prior layer or inputs. CMACs sum values from several nodes selected based on an input value. Small changes in the input result in only one of the selections nodes changing; one node is removed and another added. Larger input variations select completely different nodes. The NN is tuned by changing the weights connecting the layers. the CMAC is tuned by changing the values of the selected nodes. How those values or weights are changed could be via GA or GD or some other method.

See also:


file: /Techref/method/ai/NeuralNets-vs-GeneticAlgorithms.htm, 2KB, , updated: 2017/11/25 12:18, local time: 2018/8/14 00:04, owner: JMN-EFP-786,
TOP NEW HELP FIND: 
54.161.49.216:LOG IN

 ©2018 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE! / 

<A HREF="http://www.piclist.com/Techref/method/ai/NeuralNets-vs-GeneticAlgorithms.htm"> Neural Networks vs Genetic Algorithms</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

  PICList 2018 contributors:
o List host: MIT, Site host massmind.org, Top posters @20180814 RussellMc, Van Horn, David, Sean Breheny, David C Brown, Isaac M. Bavaresco, Bob Blick, Neil, John Gardner, Denny Esterline, Brent Brown,
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .