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- W2620239918 abstract "In this work, a new unconditionally stable finite-difference time-domain (FDTD) method with the split-field perfectly matched layer (PML) is proposed for the analysis of time reversal (TR) waves. The proposed method is very suitable for multiscale problems involving microstructures. The spatial and temporal derivatives in this method are discretized by the central difference technique and Newmark-Beta algorithm, respectively, and the derivation results in the calculation of a banded-sparse matrix equation. Since the coefficient matrix keeps unchanged during the whole simulation process, the lower-upper (LU) decomposition of the matrix needs to be performed only once at the beginning of the calculation. Moreover, the reverse Cuthill–Mckee (RCM) technique, an effective preprocessing technique in bandwidth compression of sparse matrices, is used to improve computational efficiency. The super-resolution focusing of TR wave propagation in two- and three-dimensional spaces is included to validate the accuracy and efficiency of the proposed method." @default.
- W2620239918 created "2017-06-05" @default.
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- W2620239918 date "2017-09-01" @default.
- W2620239918 modified "2023-09-27" @default.
- W2620239918 title "Newmark-Beta-FDTD method for super-resolution analysis of time reversal waves" @default.
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- W2620239918 doi "https://doi.org/10.1016/j.jcp.2017.05.036" @default.
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