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- W2964529078 abstract "We construct memory-optimized and time-efficient parallel algorithms (and the corresponding programs) taking advantage of regularized modified (alpha )-processes, namely the modified steepest descent method and the modified minimal residual method, for solving the nonlinear equation of the structural inverse gravimetry problem. Memory optimization relies on the block-Toeplitz structure of the Jacobian matrix. The algorithms are implemented on multicore CPUs and GPUs through the use of, respectively, OpenMP and NVIDIA CUDA technologies. We analyze the efficiency and speedup of the algorithms. In addition, we solve a model problem of gravimetry and conduct a comparative study regarding the number of iterations and computation time against algorithms based on conjugate gradient-type methods and the componentwise gradient method. The comparison demonstrates that the algorithms based on (alpha )-processes perform better, reducing the number of iterations and the computation time by as much as 50%." @default.
- W2964529078 created "2019-08-13" @default.
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- W2964529078 date "2019-01-01" @default.
- W2964529078 modified "2023-10-14" @default.
- W2964529078 title "Using Multicore and Graphics Processors to Solve The Structural Inverse Gravimetry Problem in a Two-Layer Medium by Means of $$alpha $$ -Processes" @default.
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- W2964529078 doi "https://doi.org/10.1007/978-3-030-28163-2_20" @default.
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