Module details
CO836 Cognitive Neural Networks (15 credits)
Syllabus
- Introduction to cognitive neural networks.
Neural networks will be
placed into a historical perspective related to symbolic approaches and in
the context of the artificial intelligence hypothesis. Students will
familiarise themselves with the Leabra environment.
- The individual neuron.
The idea of the components of a neuron as a
'detector' will be developed. Neural networks will be explained in terms of
the biology of the brain at a cellular electro-transmission level. The
neurobiology will be abstracted into an initial neural network framework,
i.e. a set of mathematical equations. Single neuron simulations.
- Networks of Neurons.
A general framework will be provided for neural
network architectures both at an abstract level and in terms of networks in
the cortex. Unidirectional (feedforward) and bi-directional (recurrent)
interactions will be explained together with inhibitory mechanisms.
- Model Learning.
A simple Hebbian model of learning will be outlined,
pertaining to neurobiology and neural networks. Other models of unsupervised
learning will be introduced.
- Task Learning.
Error-driven task learning will be outlined; the delta
rule and back propagation will be presented. A discussion of the biological
implausibility of back propagation networks will follow. Motivated by this
implausibility, the generalised recirculation algorithm will be introduced
and its mathematical formulation and properties discussed.
Note
This web page provides advance information about a module due
to run in the coming academic year. We believe the details are
accurate at the time of writing but they may be subject to
change.