Numerical Weather Prediction (NWP) and hybrid ARMA/ANN model to predict global radiation

We propose in this paper an original technique to predict global radiation using a hybrid ARMA/ANN model and data issued from a numerical weather prediction model (ALADIN). We particularly look at the Multi-Layer Perceptron. After optimizing our architecture with ALADIN and endogenous data previously made stationary and using an innovative pre-input layer selection method, we combined it to an ARMA model from a rule based on the analysis of hourly data series. This model has been used to forecast the hourly global radiation for five places in Mediterranean area. Our technique outperforms classical models for all the places. The nRMSE for our hybrid model ANN/ARMA is 14.9% compared to 26.2% for the na\"ive persistence predictor. Note that in the stand alone ANN case the nRMSE is 18.4%. Finally, in order to discuss the reliability of the forecaster outputs, a complementary study concerning the confidence interval of each prediction is proposedComment: Energy (2012)

Linear indices in nonlinear structural equation models: best fitting proper indices and other composites

Best fitting proper indices, Generalized canonical variables, Partial least squares, Latent factor scores, Indices, Interaction, Flat maximum,

Geometric representation of association between categories

Categorical data, simplex, triangular plot, paired comparisons, rank orders, permutation polytope, center of gravity, BTL model, Rasch model, inertia, association model, variation, multidimensional unfolding, biplot, multinomial response model, loglinear model, forced classification, classification tree,