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Ultrasonic sparse array can increase the resolution by enlarging the aperture without adding system complexity, and it has characteristics of large scanning range and high detection accuracy, which is one of the most promising applications of ultrasonic nondestructive testing technology. The application of reciprocity theory to scattering of guided waves by flaws was studied. A finite element model...
The role of cluster scattering on electron transport properties of ZnMgO/ZnO heterostructures considering three- and five-valley conduction band models was investigated with an ensemble Monte Carlo program developed by us. The cluster scattering is modeled as an elastic collision, in which the electrons confined in ZnO well are scattered by MgZnO clusters. The interface roughness scattering, dislocation...
Motion compensation is very important for Inverse synthetic aperture radar (ISAR) imaging while the imaging quality is directly dependent on its performance. Range alignment (envelope alignment) is the key procedure of motion compensation. The nonextensive entropy, known as Tsallis entropy, is introduced into ISAR range alignment because of the correlation between adjacent one-dimensional range profile...
A modified differential double pulse Brillouin sensing technique is demonstrated where both the wide and somewhat narrower pulses are launched simultaneously, rather than sequentially, using different frequency carriers.
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