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**Earthquake Engineering (EE-UQ) / Re: Validating the Surrogate Model**

« **on:**June 19, 2023, 11:59:47 AM »

Thank you Kunashi and Sang-ri for your answers and explanations.

So i understand that since PLOM modelling is all about approximating the joint distribution of input parameters and the output responses of the model, it is not possible to validate the results one by one but rather looking at the metrics such as mean, or other statistical quantities for the two data sets, the validating data set and the new realizations data set.

Then Sang ri talked about the importance of the sample distribution of the input parameters between the training and test dataset. However if it is not the same, it has to be constrained. This is also mentioned in your paper(https://onlinelibrary.wiley.com/doi/pdf/10.1002/eqe.3839) and can be best understood by the image attached. I did find the option for constraints under the advanced options button on the UQ Tab. However i guess it needs an python script. Can you help me with what this python script should look like and the what configuration should be used for iteration number and iteration tolerance?

Best regards,

Gaurav

So i understand that since PLOM modelling is all about approximating the joint distribution of input parameters and the output responses of the model, it is not possible to validate the results one by one but rather looking at the metrics such as mean, or other statistical quantities for the two data sets, the validating data set and the new realizations data set.

Then Sang ri talked about the importance of the sample distribution of the input parameters between the training and test dataset. However if it is not the same, it has to be constrained. This is also mentioned in your paper(https://onlinelibrary.wiley.com/doi/pdf/10.1002/eqe.3839) and can be best understood by the image attached. I did find the option for constraints under the advanced options button on the UQ Tab. However i guess it needs an python script. Can you help me with what this python script should look like and the what configuration should be used for iteration number and iteration tolerance?

Best regards,

Gaurav