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• W1925799744 abstract "Thin plate spline finite element methods are used to fit a surface to an irregularly scattered dataset [S. Roberts, M. Hegland, and I. Altas. Approximation of a Thin Plate Spline Smoother using Continuous Piecewise Polynomial Functions. SIAM, 1:208--234, 2003]. The computational bottleneck for this algorithm is the solution of large, ill-conditioned systems of linear equations at each step of a generalised cross validation algorithm. Preconditioning techniques are investigated to accelerate the convergence of the solution of these systems using Krylov subspace methods. The preconditioners under consideration are block diagonal, block triangular and constraint preconditioners [M. Benzi, G. H. Golub, and J. Liesen. Numerical solution of saddle point problems. Acta Numer., 14:1--137, 2005]. The effectiveness of each of these preconditioners is examined on a sample dataset taken from a known surface. From our numerical investigation, constraint preconditioners appear to provide improved convergence for this surface fitting problem compared to block preconditioners." @default.
• W1925799744 created "2016-06-24" @default.
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• W1925799744 date "2013-05-12" @default.
• W1925799744 modified "2023-09-26" @default.
• W1925799744 title "Computational strategies for surface fitting using thin plate spline finite element methods" @default.
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• W1925799744 doi "https://doi.org/10.21914/anziamj.v54i0.6337" @default.
• W1925799744 hasPublicationYear "2013" @default.
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