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Construction of UHV power grid is the fundamental guarantee to the growing demands of electricity in the future. Six phase transmission lines can evidently improve power transmission density, and many countries pay attention to it. A new method of fault location and phase selection on six-phase transmission lines was analyzed in this paper. The six sequence variables method to analyze the electrical...
In this paper, 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) single crystal/epoxy 1/3 composite was used as the active material of the endoscopic ultrasonic radial array transducer, because this composite exhibited ultrahigh electromechanical coupling coefficient (kt = 0.81%), very low mechanical quality factor (Qm = 11) and relatively low acoustic impedance (Zt = 12 MRayls). A 6.91 MHz PMN-PT/epoxy 1/3...
In this work, we develop the fabrication process of the radial array transducers, which are used to combine the gastroscope for acquiring ultrasound images of the surrounding organs, tissues and vessels. The PMNPT piezocrystal and its 1–3 piezocomposite were used as the active elements, respectively. High acoustic attenuation and flexibility composite material was used as the backing layers. The matching...
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