Re: Particle Swarm Optimization

Marcel Hendrix wrote:
> John Doty <jpd@[EMAIL PROTECTED]
> writes Re: Particle Swarm
Optimization
> [..]
>> Cool. I've done similar but rather less sophisticated things in 
>> Mathematica using a gnetlist back end I wrote to translate gEDA 
>> schematics into Mathematica equations. Take a look at:
> [..]
>> I don't suppose it would be hard to modify the code (Guile) to feed a 
>> different math package. My code is now part of the regular gEDA 
>> distribution, all GPL. It's nice to be able to draw the circuit rather 
>> than code the equations!
> 
> The netlist for a switched circuit does not tell the whole story.
> In principle, an hierarchically structured netlist for each valid 
> combination of the switches (including diodes) is needed. From these
> netlists state-space matrices are build. Together with some Petri-net
> massaged constraint equations, finally the network can be solved
> with exponential matrix manipulations. Unfortunately, the constraints 
> are numerical, not symbolical. One of my famous Forth toys can do all
> of this (from an annotated netlist), but I didn't use it (yet) in this 
> instance.

Ok, now the next question is "would it be useful to other people?". A 
gnetlist back end is typically an afternoon project, so given the specs, 
I'd be willing to code it. I'd get to add another unique capability to 
gEDA (strengthening its "market position"), while if you were willing to 
release your code under GPL, you'd get to promote one of your "famous 
Forth toys" to a community that might actually use it.

> 
> A normal linear circuit is a special case of a switched circuit, so I
> can handle it too. The graphic output is currently done through
> Matlab, but I guess gnuplot will be used in the future (when I have
> time, and when gnuplot handles TeX labeling).
> 
> -marcel
> 


-- 
John Doty, Noqsi Aerospace, Ltd.
http://www.noqsi.com/
--
History teaches that logical consistency is neither sufficient nor 
necessary to establish practical, real world truth. Those who attempt to 
use logic for that purpose are abusing it.