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- W4387157092 abstract "Diffraction-based tomographic strain tensor reconstruction problems in which a strain tensor field is determined from measurements made in different crystallographic directions are considered in the context of sparse matrix algebra. Previous work has shown that the estimation of the crystal elastic strain field can be cast as a linear regression problem featuring a computationally involved assembly of a system matrix forward operator. This operator models the perturbation in diffraction signal as a function of spatial strain tensor state. The structure of this system matrix is analysed and a block-partitioned factorization is derived that reveals the forward operator as a sum of weighted scalar projection operators. Moreover, the factorization method is generalized for another diffraction model in which strain and orientation are coupled and can be reconstructed jointly. The proposed block-partitioned factorization method provides a bridge to classical absorption tomography and allows exploitation of standard tomographic ray-tracing libraries for implementation of the forward operator and its adjoint. Consequently, RAM-efficient, GPU-accelerated, on-the-fly strain/orientation tensor reconstruction is made possible, paving the way for higher spatial resolution studies of intragranular deformation." @default.
- W4387157092 created "2023-09-30" @default.
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- W4387157092 date "2023-09-29" @default.
- W4387157092 modified "2023-09-30" @default.
- W4387157092 title "An efficient system matrix factorization method for scanning diffraction based strain tensor tomography" @default.
- W4387157092 doi "https://doi.org/10.1107/s2053273323008136" @default.
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- W4387157092 hasPublicationYear "2023" @default.
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