Lab 8: Particle Swarm Optimization
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### Task 1: new model

Code up one more model: Water.

### Task 2: New Inference Procedure

Implement [particle swarm optimization](?pso).

### Task 3: Are Carlisle and Dozier right?

Using the era diagrams and your models, comment on
the value of 
[Carlise and Dozer](http://unbox.org/doc/pso/Off-The-Shelf_PSO.pdf)'s
 parameter recommendations.

### What to hand-in

Source code for PSO and Water.

Era diagrams, piped through _cat -n_ (so you get line numbers).

One page of ascii text that makes an argument
for/against some particular set of PSO
parameters. That argument should be passed on
features seen in the era diagrams (including line
numbers).

