6.892 Lecture #8
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6.892 Lecture #8
Overview
Minimizing Misclassification
An Example
The Perceptron Picture
A Learning Procedure
Perceptron Learning Rule
Random Gradient Descent
How Random is this Descent?
Very Random Descent
Stochastic Approximation
Perceptron: Solution to the World’s Problems
Perceptrons: Unfortunate Dead End?
The Derivative Trick
Derivative of Sigmoid
Layout of Eye and Brain
Picture of Brain
Neuron Tutorial
Neuron Figure
Pictures of Spikes
Neurons Communicate With Spikes
Real vs. Model Neurons
What do Spikes Mean?
The Structure of the Eye
The Retina
The Receptive Field
Retinal Receptive Fields
The Structure of LGN