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Neural Networks

patupat
Jan 3, 2008, 8:37 PM 6

1. How the Human Brain Learns?

There are so many theories about how the brain trains itself to process information. In the human brain, a typical neuron collects signals from others through a host of fine structures called dendrites. The neuron sends out spikes of electrical activity through a long, thin stand known as an axon, which splits into thousands of branches. At the end of each branch, a structure called a synapse converts the activity from the axon into electrical effects that inhibit or excite activity from the axon into electrical effects that inhibit or excite activity in the connected neurons. When a neuron receives excitatory input that is sufficiently large compared with its inhibitory input, it sends a spike of electrical activity down its axon. Learning occurs by changing the effectiveness of the synapses so that the influence of one neuron on another changes.

 

 

Components of a neuron

 

The synapse


2. Artificial Neurons (digital representation)

The neuron model


A simple neuron


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