This book clearly describes about prediction of breakdown voltage of solid insulator due to voids. The voids or cavities within the solid insulating material during manufacturing are potential sources of electrical trees which can lead to continuous degradation and breakdown of insulating material due to Partial Discharge (PD). A major field of Artificial Neural Networks (ANN) and Least Square Support Vector Machine (LS-SVM)application is function estimation due to its useful properties, such as, non-linearity and adaptively particularly when the equation describing the function is unknown....