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An inverse problem to determine parameters of microstructured solids by means of group and phase velocities of wave packets is studied. It is proved that in the case of normal dispersion the physical solution is unique and in the case of anomalous dispersion two physical solutions occur. Numerical tests are presented.
This author is supported by Estonian Science Foundation grant 7728 and Estonian Ministry of Education and Science TF themes SF0140077s08, SF0140083s08
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