Re: Particle Swarm Optimization

Marcel Hendrix wrote:
> John Doty <jpd@[EMAIL PROTECTED]
> writes Re: Copyleft and embedded
Forth
> [..]
>> The problem with the BSD approach is well illustrated by SPICE, for 
>> which there are several incompatible commercial versions.
Operationally, 
>> these are only slight improvements on the Berkeley original, but the 
>> changes are sufficiently difficult to reverse engineer that SPICE 
>> remains balkanized. 
> 
> The improvements in LTSPICE are far from minor. It blows, e.g., PSPICE
> out of the water, and is also far, far, better than HSPICE (for our 
> kind of work).
> 
>>                     The user gets to pay through the nose while 
>> struggling with the incompatibilities, since hardware manufacturers' 
>> device model parameters and macromodels often aren't ****table.
> 
> Again, at least for our kind of work (power electronics), these models 
> proved to be worthless, YMMV.
> 
> I do agree that SPICE should have had a licence that furthered technical
> excellence of the program.
> 
> -marcel
> 

There seems to be an echo in here ;-)

-- 
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.