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kbarnhart committed May 7, 2019
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Intro to calibration
# Intro to calibration
- what is calibration/optimization/parameter estimation.
- gradient based vs global
- complex model vs statistical surogate
- black box model (parameters > model > outputs)
- parameters and outputs must be defined.

Our toy model
- gradient based vs global
- complex model vs statistical surogate
- parameter uncertainty or just best parameter set

# Our toy model
- diffusion of heat + surface temperature history
- OF based on fitting Clow paper data.

Intro to Dakota
- Dakota has more bells and whistles, it is well thought out, and the documentation is quite good. Its just extensive and not an iPhone.
- Core activity (assuming you have a black box model set up) is to create and run an input file.
- Look at .in file.
# Intro to Dakota
- Dakota has more bells and whistles, it is well thought out, and the
documentation is quite good. Its just extensive and not an iPhone.
- Core activity (assuming you have a black box model set up) is to create and
run an input file.
- Look at .in file.
* discuss each part
- Look at template file and driver.py (connect this with black box parts)
- Run Dakota, create plots, look at output.
- Run Dakota, create plots, look at output.
- Discuss Dakota's file structure

Other methods
We just did a brute force grid search.
Step 2: Gradient based method
Step 3: EGO
# Other methods
We just did a brute force grid search. This is sort of an optimization.
Next we will do a gradient based method and a global method.

Discussion:
* computational cost of Dakota method vs complex model evaluation.
- calculation of numerical gradients
- increasing dimension
-
* RST file, .out file and reproducible research
* We haven't yet talked about the uncertainty estimates on parameters, just which
parameter is best. That is for another day.
# Discussion:
- computational cost of Dakota method vs complex model evaluation.
* calculation of numerical gradients
* increasing dimension
- do you need parameter estimates, or just a best fit point.
- RST file, .out file and reproducible research
- We haven't yet talked about the uncertainty estimates on parameters, just
which parameter is best. That is for another day.

Exploration if time:
# Exploration if time:
* Explore other methods
* Add a second component of the objective function.
* Make the model (of surface temperature history) more complex.

* Make the model (of surface temperature history) more complex.

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