Biologically inspired learning in a layered neural net

Details Biologically inspired learning in a layered neural net Biologically inspired learning in a layered neural net

2003-05-28

arxiv.org/abs/cond-mat/0305650v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

10.1016/j.physa.2003.12.008

A feed-forward neural net with adaptable synaptic weights and fixed, zero or non-zero threshold potentials is studied, in the presence of a global feedback signal that can only have two values, depending on whether the output of the network in reaction to its input is right or wrong. It is found, on the basis of four biologically motivated assumptions, that only two forms of learning are possible, Hebbian and Anti-Hebbian learning. Hebbian learning should take place when the output is right, while there should be Anti-Hebbian learning when the output is wrong. For the Anti-Hebbian part of the learning rule a particular choice is made, which guarantees an adequate average neuronal activity without the need of introducing, by hand, control mechanisms like extremal dynamics. A network with realistic, i.e., non-zero threshold potentials is shown to perform its task of realizing the desired input-output relations best if it is sufficiently diluted, i.e. if only a relatively low fraction of all possible synaptic connections is realized.

Affiliated with

Also associated with

No associations

Rating

Biologically inspired learning in a layered neural net does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Biologically inspired learning in a layered neural net, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biologically inspired learning in a layered neural net will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-648744