To determine the optimal model, various performance indices (R, values account for and root mean square error) were determined, and the model obtained from dataset #3 was selected as the optimal model.
The autologistic approach allows obtaining unbiased estimates of each model variable coefficient and significance, but it tends to artificially inflate the autologistic model performance metrics index because it incorporates information on the neighboring sites in the same data set.
The buyer applied standard valuation models, using performance indices and tools such as earnings before interest, taxes, depreciation, and amortization (EBITDA) multiples, comparables, and standard discounted cash flow.
Modeling of performance indices of the whole flow field from impeller parameters often encounters some challenges, especially lower prediction accuracy in relatively small and large flow points, dependence on designers' experience and time-consuming designing process.
To model (linear regression model) the driving performance indices through the different neuropsychological tests it was necessary that the indices included the effects of all viable driving performance parameters i.e. the indices that were derived by considering all 24 driving performance parameters, which were DPI1 and DPI1-weighted.
Based on the numerical model, the performance indexes of boiler system are calculated at different conditions using EES Engineering Equation SoftwareEES Engineering Equation Software
With respect to each dimension, the aforementioned merging process acts to create a topology of fuzzy sets that enables us to elicit interpretability constraints, which are used to minimize the model's performance index in terms of non-linear constrained optimization.
Open image in new window Fig. 5 Cross-correlation of predicted and observed values of UCS for ANN model Open image in new window Fig. 6 Cross-correlation of predicted and observed values of BTS for ANN model Table 5 Performance indices (RMSE, VAF and R2) for ANN model Predicted parameter VAF% RMSE R2 UCS 94.5 2.75 0.94 BTS 63.5 3 0.64 RMSE root mean square error, VAF% value account for and R2.
To assess the model performances, some performance indices such as correlation coefficient (R), variance account for (VAF) and root mean square error (RMSE) were calculated and compared for the three models.
