نتایج جستجو برای: elastic waves
تعداد نتایج: 179810 فیلتر نتایج به سال:
In this short paper we show how one may extract elastic properties of materials by probing it with elastic waves and processing the signal that returns (i.e. the scattered waves) in an appropriate way. In particular, we present a linearized inversion scheme to estimate the high–frequency, anisotropic components of the elastic tensor and density (the elastic moduli) in human tissue. For a given ...
A system is being investigated that uses elastic waves as the primary detection mechanism to detect buried land mines [1]. The system is shown in Fig. 1. In the system, a stationary transducer, located on the surface of the soil adjacent to the search region, generates an elastic wave in the earth. The elastic wave propagates through the search region and interacts with the buried mine. This ca...
We derive and numerically demonstrate that perfect absorption of elastic waves can be achieved in two types of ultra-thin elastic meta-films: one requires a large value of almost pure imaginary effective mass density and a free space boundary, while the other requires a small value of almost pure imaginary effective modulus and a hard wall boundary. When the pure imaginary density or modulus ex...
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