[Ktechlab-devel] Improving the code

[Mathias Scroccaro]

Hello Alan,

No problem about the e-mail format. One of my completion of course work
proposals envolves a OpenCl-based filtering of ECG signal. I was having
some problems loading the data in the device with C++, so I forgot that
project. My final project now is only the circuit of a electrocardiography
with a real-time plotting Qt gui. I saw that ktechlab was developing for
Qt4. I think that its a pretty good idea

I am thinking, the algoritms probably work with state equations in matrix's
and differential equations. So its a good start studying component models
and matrix circuit solutions?  A big improve it will be a simulation
program that solves matrix problems with OpenCl or Cuda based algorithms. I
don't know any Windows circuit simulation program, like NI Multisim, that
do this kind of thing.

Sorry for my english.

2016-08-27 11:39 GMT-03:00 Alan Grimes <ALONZOTG at verizon.net>:

> Mathias Scroccaro wrote:
> > Hi , my name is Mathias , I'm a Brazilian university student. I'm
> > almost finished my course in electronic engineering and I want to
> > engage in a master's program . I would like to help improve the
> > program code and would like to know the best area to study the master
> > who could contribute positively in the program circuit algorithms.
> > Congrats for the already developed code, Mathias
>
>
> My e-mail program is having trouble with this message for some reason,
> my apologies for formatting issues. =\
>
> In response to your question, many long years ago I went through the
> code, focusing on the simulator, to improve the code, I was expecting a
> gui re-write so I left most of the gui code alone.
>
> Once again, it's been years since I've spent time with the code. To the
> best of my recollection, the biggest simulator issue is reviewing the
> models.
>
> Lets say you had a circuit with a generator powering a resistor and a
> chain of two resistors. So you have two current branches, you need to
> compute two currents, and then you can derive the third current from
> that, So you have three current branches... Current nodes are voltage
> points so you have three of those two, the top of the generator, the
> bottom of the generator, and the node between the resistors...
>
> The branch with the stack of resistors is interesting because you only
> need to compute the current of that branch once. So you need to figure
> out where you need to compute currents and select the best part to use
> as a current probe.
>
> Then you need to select which model to use, a model that just computes
> voltage or one with current too. Several years after working on the
> code, I bought a book on circuit simulation... So yeah, you have to go
> through all those equations and check everything.
>
> Ktechlab uses a kinda crude numeric integration approach that's almost
> good enough for low frequency work.
>
> Another interesting idea is to look at the crude matrix library that I
> had written for a university project and then put in ktechlab because it
> was cleaner than what was there, and see whether an OpenCL-based
> approach has any benefits.
>
>
> Now if you want to talk about Ktechlab 2.0 then you are talking about
> solving differential equations to figure out filter characteristics and
> stuff, probably using one of the more traditional back-ends which are
> much better developed.
>
> --
> IQ is a measure of how stupid you feel.
>
> Powers are not rights.
>
>
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