Search found 13 matches

by nocegius
Mon Sep 07, 2020 9:13 am
Forum: Vensim
Topic: Calibration vensim model
Replies: 9
Views: 4206

Re: Calibration vensim model

Thank you for your answers. I have other questions .... sorry

About Kalman Filtering, which is the differences with "normal" calibration? And with behavior reproduction test ?

Thank you
Giuseppe
by nocegius
Wed Sep 02, 2020 7:06 am
Forum: System Dynamics Discussion
Topic: QGIS - Phyton - Vensim
Replies: 8
Views: 13284

Re: QGIS - Phyton - Vensim

I know ... so I try to develop some model ... I hope ti achive it :-)
by nocegius
Sun Aug 30, 2020 9:48 am
Forum: System Dynamics Discussion
Topic: QGIS - Phyton - Vensim
Replies: 8
Views: 13284

Re: QGIS - Phyton - Vensim

I am at very early stage of my work. I am studying qgis because it is possible to use python to program qgis :-).
However I need to integrate gis and vensim because I need simulate time and geographical evolution of my model
by nocegius
Sun Aug 30, 2020 9:44 am
Forum: Vensim
Topic: Calibration vensim model
Replies: 9
Views: 4206

Re: Calibration vensim model

Thank you for your answers. I did not know kalman filering it seems very interesting. I will try it.
So candidate parameters, could be parameters that are used to simulate growth ? In a disease model candidate parameter could be the infection rate, if I well understand.
by nocegius
Mon Aug 24, 2020 2:33 pm
Forum: Vensim
Topic: Calibration vensim model
Replies: 9
Views: 4206

Re: Calibration vensim model

Yes Tom, calbration is a very big problem. I have some questions.

The first question is how I can select the parameters to put into the vensim calibration form.

The second is how I select the model variables or costants that are calibrated with real data.

For now ... I have these questions.
by nocegius
Fri Aug 21, 2020 7:09 am
Forum: Vensim
Topic: Calibration vensim model
Replies: 9
Views: 4206

Calibration vensim model

Hi everyone
I am looking documents or other materials about calibration of vensim model.
I read the manual of vensim. Are there other?
Thank you
Giuseppe
by nocegius
Thu Aug 20, 2020 12:26 pm
Forum: System Dynamics Discussion
Topic: QGIS - Phyton - Vensim
Replies: 8
Views: 13284

Re: QGIS - Phyton - Vensim

I am starting to combine qgis, vensim and python, so I appreciate very much if it is possible to work together to develop such model
by nocegius
Wed Aug 10, 2016 5:26 am
Forum: Vensim
Topic: How can I use Vensim DLL in Python, Linux?
Replies: 8
Views: 7095

Re: How can I use Vensim DLL in Python, Linux?

thank you pbreach your hint it is very useful. i will try and then tell you.

giuseppe
by nocegius
Mon Aug 08, 2016 5:54 pm
Forum: Vensim
Topic: How can I use Vensim DLL in Python, Linux?
Replies: 8
Views: 7095

Re: How can I use Vensim DLL in Python, Linux?

It runs or better venapp works i have not yet tried DLL .. but i suppose it works

giuseppe
by nocegius
Sat Aug 06, 2016 3:25 pm
Forum: Vensim
Topic: How can I use Vensim DLL in Python, Linux?
Replies: 8
Views: 7095

Re: How can I use Vensim DLL in Python, Linux?

Hi

I develop model using vensim DSS in ubuntu 16.04 using WINE. I want use DDL to integrate my vensim models with other software and R or GIS.

Can I will do it using wine or is better to use virtual machine with windows ?

Thanks
Giuseppe
by nocegius
Tue Jun 02, 2015 4:56 pm
Forum: Vensim
Topic: grass software
Replies: 4
Views: 3041

Re: grass software

for the first question, no i will try and tell you what happen

I try to use grass for linus not for win, but Grass gis could modify the wine. i do not know but i think that it is unlikely

thank you
by nocegius
Mon Jun 01, 2015 7:23 pm
Forum: Vensim
Topic: grass software
Replies: 4
Views: 3041

Re: grass software

I simulate window by WINE.

vensim DSS does not start. Vensim PLE starts and works without any problems.

When I delete Grass Gis, and reinstall vensim DSS, vensim DSS works normally

unfortunately I have no error message.

Thank you
giuseppe
by nocegius
Sat May 30, 2015 8:31 am
Forum: Vensim
Topic: grass software
Replies: 4
Views: 3041

grass software

Dear

I have problem with vensim DSS version 6.3 (x32) and Grass software for gis. I use ubuntu 10.04.
the problem is that if I install grass gis, vensim DSS does not work, while vensim PLS version 6.3 (x32) works

Have you the same problem ?
thank you for your help

Giuseppe