estimating the clearness index. Radial Basis Functions, RBF, and Multilayer Perceptron,
MLP, models have been investigated using long-term data from eight stations in Oman. It is
shown that both the RBF and MLP models performed well based on the root-mean-square
error between the observed and estimated solar radiations. However, the RBF models are
preferred since they require less computing power. The RBF model, obtained by training …