Neural Networks…. …. The Undiscovered Country. Jonathan Y

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Presentation transcript:

Neural Networks…. …. The Undiscovered Country. Jonathan Y Neural Networks…. ….The Undiscovered Country ? Jonathan Y. Clark Department of Computing University of Surrey j.y.clark@surrey.ac.uk

Conventional Programs If …then … Inflexible Extremely precise Do not deal easily with ‘fuzzy’ data

Neural Networks Able to deal with ‘fuzzy’ data Able to learn from experience Able to generalise

Natural Neural Networks Simple NNNs: Coelenterates (Hydra) Higher Animals: The Brain

A Biological Neuron

Example: A Simple Vision System… Perceptron Example: A Simple Vision System…

Multilayer Perceptron

Artificial Neural Networks SUPERVISED (for identifying) UNSUPERVISED (for classifying)

Self-Organising Map (SOM)

Lithops (Living Stones)

Conclusions and Summary Artificial Neural Networks (ANNs) are :- FUN (definitely!) NOVEL (almost…..) USEFUL (especially if expert unavailable) A link between Biology and Computing A step in the direction of ‘thinking’ machines…

That’s All Folks! (Bugs Bunny Copyright Warner Bros.) Credits: Star trek pictures http://www.screenthemes.com/ (except UC_102_3.jpg from http://stardock.hispeed.com/) and Paramount Inc. Hydra pictures http://www.microscopyu.com/ moviegallery/pondscum /coelenterata/hydra/ Nerve cell picture www.sp.uconn.edu/ ~bi102vc/102f00/terry/ That’s All Folks! (Bugs Bunny Copyright Warner Bros.)