Flashcards
Untitled
Cards in this deck (5)
- 1Machine LearningArtificial Neural Networks:
– Neurons: linear threshold units
– Networks:
• Feed forward (Rosenblatt)
• Fully connected graphs (Hebb)
– Learning:
• Supervised (backprop)
• Unsupervised (correlations) - 2ML Internal Aspects • What is changing?– Weights, data structures, executable code
– How are changes made?
• Learning rule:
– Feedback + internal state ==> new state
» Weight adjustments
» Structure modifications
» Code changes - 3Learning Weights:Simplest, most pervasive:
• Artificial neural networks
• Bayesian inference networks
• Parameterized models - 4Learning rule: weight update procedure– Dependent on feedback:
• Indirect: reinforcement
• Direct: error correction
• Embedded domain knowledge: what to change - 5External Aspects• Form of feedback:
– Direct: correct action
– Indirect: reinforcement
• Frequency of feedback
– After each action
– After a sequence of actions
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- Intro to AI Flashcards on Untitled, created by tifani.obrien on 09/05/2014.
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- tifani.obrien
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