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FireDynamics / propti

PROPTI is an interface tool that couples simulation models with algorithms to solve the inverse problem of material parameter estimation in a modular way. It is designed with flexibility in mind and can communicate with arbitrary algorithm libraries and simulation models. Furthermore, it provides basic means of pre- and post-processing.
MIT License
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Expensiveness of sensitivity analysis #49

Open p-lauer opened 5 years ago

p-lauer commented 5 years ago

In GitLab by @hehnen1 on Mar 9, 2018, 10:24

Given the default parameters we have now for FAST, this method seems very expensive to me. For one of my setups that consists of 34 parameters, FAST would end up performing about 75 k simulations which would be about 30 days of computing time.

It may be interesting to look into different possibilities here.

I propose we could divide the sensitivity analysis into two domains: before the IMP and after (in between) the IMP. Otherwise, we may end up in a situation that we "throw away" large amounts of computing time that is of not more use as creating some numbers indicating a parameters sensitivity.

Before

There we should define a value of the amount of simulations that we feel comfortable about to be performed before the IMP. As a first proposal, we could use the SCEUA and say that we only want up to four generations worth of simulations to be performed, as an upper limit.

After

Here we could just use the information that has been created during the IMP. Also, we would end up in having a parameter set that could be used. While possibly a new IMP is performed in the mean time.

p-lauer commented 5 years ago

In GitLab by @hehnen1 on Mar 9, 2018, 10:24

changed the description

p-lauer commented 5 years ago

In GitLab by @hehnen1 on May 14, 2018, 15:50

Side note: These 30 days are now significantly less, because we found an error in my job launch script. Still, it is a lot of simulations.