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A fast parallel solver for the forward problem in electrical impedance tomography

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Figure

Fig. 2.Partitions before and after Zoltan load balancing—This is a relativelysmall head mesh with two million elements that is partitioned into four sections.Some electrodes were split onto different processors by the load balancing ofDUNE-FEM
Fig. 3(a)]. Even though the efficiency drops, the absolute times
Fig. 3.Strong and weak scaling of the system matrix assembly—As expected, the efficiency of the matrix assembly drops when we move to more processorssince the ratio of computation to communication is getting smaller
Fig. 4.Strong and weak scaling of the assembly of the AMG preconditioner ML—Since the computational cost is larger on the fine mesh, the increasingcommunication volume between parallel processes has a smaller influence on the overall efficiency of the precond
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