Exact(3)
To date, the best approach to reach a final evaluation on the performance of even a "robust" statistical classifier such as NN is to reuse the collected data both for the training and the validation of the chosen classifier: this procedure is commonly referred to as cross validation (well described in many "classical" statistical books [37]).
We found that the temporal adjustment approach predicted measured values in the validation well.
We also assessed the validity of a modified modeling approach where predicted arsenic concentrations were constrained to be within the range of measured arsenic levels from wells within 5, 7, and 10 km of each validation well and evaluated how each constraint affected these statistics.
Similar(57)
The validity of the predictive model was assessed for 77 validation wells by comparing the predicted nitrate concentration to the observed nitrate concentrations.
A plot of observed vs. predicted nitrate for 25 validation wells yielded a significant (p-value < 0.001) and a positive correlation.
The validation wells were randomly selected from 482 wells with USGS measurements from 1992-1993.
The maximal specificity of our bedrock well model for all classification cutpoints was attained when predicted concentrations were limited to those measured in other bedrock wells within 5 km of the validation wells, and specificity increased as cutpoint concentration increased.
For a cutpoint of 5 µg/L, the highest overall agreement (70%) was achieved when the model predictions were constrained to concentrations measured in wells within 5 km of the validation wells.
The subsequent sections describe these engineering components of automated DOF workflows: virtual multiphase metering, smart production surveillance, well-test validation, and well diagnostics.
The moment also offered Mr. Carter a bit of validation as well.
The aging model describes the validation experiments well.
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