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The pathological or physiological changes of the crystalline lens directly affect the eye accommodation and transmittance, and then increase the risk of the presbyopia and cataract for people in middle and old age groups. There is no universally accepted quantitative method to measure the lens' mechanical properties in vivo so far. This study aims to investigate the possibility of assessing the age-related...
The pathological or physiological changes of the crystalline lens directly affect the eye accommodation and transmittance, and then increase the risk of the presbyopia and cataract for people in middle and old age groups. This risk has a remarkable rise with age, seriously influencing the living quality of the elderly, and also posing a huge burden on public health. There is no universally accepted...
Most ultrasound elastographic methods utilize a purely elastic model to describe the liver mechanical properties. However, to describe tissue that is dispersive and to obtain an accurate measure of tissue elasticity, the tissue viscoelastic property should be examined. The objective of this study was to investigate the shear viscoelastic characteristics, as measured by ultrasound elastography, of...
In this article, we demonstrate a piezoelectric micromachined diaphragm device based on PMN-PT single crystal thin layer. The electrical properties of the device are characterized. A finite element analysis is carried out for the fabricated model. Harmonic analysis is performed to investigate the vibrational modalities of the diaphragm. The FEA results show very good agreement with the experimental...
There is an important military significance about aircrafts type recognition based on shortwave communication. Acoustic signals received by shortwave radio about aircrafts are complex and they contain some valuable information. It is very difficult to identify the aircraft type based on background sound signals of shortwave communication. In order to solve this problem, in this paper two methods for...
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