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AI Basics and Neural Networks Introduction
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Cheesecake Labs
October 31, 2017
Technology
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AI Basics and Neural Networks Introduction
Cheesecake Labs
October 31, 2017
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Transcript
Artificial Intelligence Basics and Neural Networks Introduction Frederico Jordan
What is Artificial Intelligence (AI)?
AI in Popular Culture
AI Effect "AI is whatever hasn't been done yet." Douglas
Hofstadter "Every time we figure out a piece of it, it stops being magical; we say, 'Oh, that's just a computation.'" Rodney Brooks
Types of Artificial Intelligence
Weak AI (Narrow AI) Non-sentient machine intelligence, typically focused on
a narrow task.
Strong AI Hypothetical Sentient machine (with consciousness, sentience and mind).
Strong AI Hypothetical Sentient machine (with consciousness, sentience and mind).
Artificial general intelligence (AGI): Machine with the ability to apply intelligence to any problem, rather than just one specific problem "At least as smart as a typical human".
Superintelligence Hypothetical Artificial intelligence far surpassing that of the brightest
and most gifted human minds.
Artificial Intelligence Branches • Machine learning ◦ Neural networks ▪
Perceptron ▪ Recurrent neural network ▪ Convoluted neural network ◦ Support Vector Machines (SVM) • Fuzzy systems • Evolutionary algorithms ◦ Genetic algorithm ◦ Differential evolution • Swarm Intelligence • Probabilistic methods
Neural Networks What is this ?
Neural Networks Uses
OK, but what are they?
Let’s get TECHNICAL!
Perceptrons
Perceptrons • (-2) and (-2) – Weights (W) • 3
– Bias/Threshold (b)
Perceptrons
Perceptrons • x 1 – Is it raining? • x
2 – Does your girlfriend/boyfriend want to go? • x 3 – Is it near public transportation?
Perceptrons
Neural Networks Finally!
Perceptrons
Neural Networks
How do they learn?
Real World Problem!
Recognizing Handwritten Digits
Database The MNIST (Modified National Institute of Standards and Technology)
database Contains 60,000 training images and 10,000 testing images.
Neural Network Architecture
Measuring Outcome! Cost Function
Neural Network Architecture
Neural Network Architecture
Cost Function
Neural Networks
Learning
Gradient Descent
Cost Function
Gradient Descent
Gradient Descent
Bonus github.com/fredericojordan/neural playground.tensorflow.org
Acknowledgements NeuralNetworksAndDeepLearning.com Michael Nielsen
Thank you!