【摘 要】
：
Background,Motivation and Objective Brillouin scattering enables a nondestructive and noncontact technique to measure the hypersonic wave velocity in thin materials.However,weak thermal phonons result
论文部分内容阅读
Background,Motivation and Objective Brillouin scattering enables a nondestructive and noncontact technique to measure the hypersonic wave velocity in thin materials.However,weak thermal phonons result in the long time and low accuracy measurement.
其他文献
Background, Motivation and Objective In order to obtain the high performance of Surface Acoustic Wave (SAW) devices, it is very important for the interdigital transducer (IDT) to be made the unidirect
Background, Motivation and Objective In this paper we present designs of an aluminum nitride (AlN) based mechanical stack for transmit/receive applications in silicon. By optimal design of the mechani
Background,Motivation and Objective Vascular velocity measures by conventional duplex ultrasound can be unreliable since color Doppler is affected by aliasing and beam/flow angle.Several strategies we
Background, Motivation and Objective In ultrasound transducers, the most popular fabrication method for 1-3 piezocomposites (i.e. aligned piezoelectric rods in a polymer matrix) is the ?Dice and Fill?
Background,Motivation and Objective Recently,intravascular diagnosis like intravascular ultrasonography(IVUS)has been used clinically in medical field.The ultrasound probe should be rotated within the
Background,Motivation and Objective Micromachined ultrasonic transducers(MUTs) are an emerging class of MEMS devices,which can be used in a wide variety of potential applications such as in gesture re
Background,Motivation and Objective Recently,ultrasound applications with the assistance of high-intensity ultrasound pulse are used increasingly in medical systems.It is necessary to measure the dist
Background,Motivation and Objective Ultrasonic imaging transducer is often required to compose a beam pattern of a low sidelobe level and a small beam width over a long focal region to achieve good im
Background,Motivation and Objective Recently,1-3 piezocomposites are widely used in underwater acoustic transducers to overcome the limitation of conventional piezoceramics.However,the structure of th
Background,Motivation and Objective In the ultrasonic transducer,a backing layer is generally made of composite material using metal powder and polymer to provide proper attenuation coefficient and ac