Artificial Neural Network (ANN) is an information processing paradigm that is inspired by the way of biological nervous systems, such as the brain (processing information). The key element of this paradigm is the novel structure of the information processing system. It is composed of a large number of highly interconnected processing elements (neurones) working in unison to solve specific problems. ANNs, like people(they learn by example). An ANN is configured for a specific application, such as pattern recognition or data classification, through a learning process. Learning in biological systems involves adjustments to the synaptic connections that exist between the neurones....

i can refer you to read some good articles to make a good research
http://arabteam2000-forumindex.php?app=core&module=attach&section=attach&attach_id=102699
http://doc.ic.ac.uk/~nd/surprise_96/jour...eport.html
http://osti.gov/bridge/servlets/purl/184...bviewable/