In this paper, we study the preliminary test method in a linear regression model. The Liu-type estimator is introduced when it suspected that parameter may be constraint to subspace. We also compare estimator, ridge and Liu mean squared error sense.

Ocean wave energy has significant technical potential but limited full-scale deployments and technology convergence. Consequently, guidelines for developing converters (WECs) are still themselves, especially around experimental uncertainty analysis (UA). To develop a comprehensive WEC-specific UA methodology, we conducted 1:30 scale experiment of case study oscillating water column (OWC) WEC. T...