Motivation Computers are good at some things… Calculating 

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Presentation transcript:

Motivation Computers are good at some things… Calculating  Sorting lists Manipulating data i.e. anything involving a well-defined algorithm (involving “calculation”)

Motivation Computers are bad at some things… Recognizing faces Noticing patterns Making decisions i.e. things that humans do all the time!

Examples Image/sound recognition Faces/voices Text Problems/anomalies

Examples Decision-making Loan application Path navigation Path optimization Classification Sorting Who wrote this text?

Examples Prediction Stock market Football Purchasing habits/desires

Basic Idea of Neural Networks Since humans can easily solve certain problems that computers have a hard time solving… Why not try to mimic the brain’s behavior with a computer program?

Basic Idea of Neural Networks Humans: Observe input and/or output Numerous times Learn often by trial-and-error Extend observed cases to new observations

Basic Idea of Neural Networks Computer model: Function to turn input into output Learn from observed data Brain = highly interconnected network of simple elements Learning = adjusting (strength of) connections

InputOutput: Examples Image/sound recognition Faces/voices Text Problems/anomalies

InputOutput: Examples Decision-making Loan application Path navigation Path optimization Classification Sorting Who wrote this text?

InputOutput: Examples Prediction Stock market Football Purchasing habits/desires

Learning Supervised Reinforcement Unsupervised/associative