Fig. 8From: Optimized sparse polynomial chaos expansion with entropy regularizationPerformance comparison of SP, Ent-SP and HEnt-SP w.r.t. the OAKLEY & O’HAGAN function. (a) The relationship between the relative MSE and the size of DoE; (b) The relationship between the sparsity level of several methods and the size of DoE; (c) Enlarged details of the reconstructed PDFBack to article page