Abstract：
:The dispersion and attenuation features of the multi-physical fields coupled waves propagating in an infinite piezoelectric semiconductor and the reflection problem at a boundary which is mechanically free, electrically insulation and the dielectrically open circuit are studied in this paper. Different from the classic dielectric piezoelectric medium, there are four kinds of coupled elastic waves, i.e. the quasi-longitudinal wave (QP), the quasi-traverse wave (QSV), the electric-acoustic wave (EA) and the electron or hole carriers wave (CP), in a piezoelectric semiconductor. The influences of the steady carrier density and biasing electric field upon the dispersion and attenuation features of these coupled elastic waves and the reflection amplitude ratios are studied numerically. The energy flux of each wave and the interaction energy fluxes among all waves are also calculated, and the energy flux balance is checked. It is found that the piezoelectric semiconductor behaves like the viscoelastic solid to carry a decaying wave. The steady carrier density and biasing electric field have significant influences on the dispersion and attenuation features and can be used to regulate the propagation of the coupled elastic waves.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Jiao F,Wei P,Zhou X,Zhou Ydoi
10.1016/j.ultras.2018.09.009subject
Has Abstractpub_date
2019-02-01 00:00:00pages
68-78eissn
0041-624Xissn
1874-9968pii
S0041-624X(18)30253-1journal_volume
92pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:In this newly developed method, the ultrasonic diagnosis has become quantitative. The data will remain quantitative so far as an image storage tube is used. With the conventional storage type CRT, it is impossible to memorize the reflected echo signals of different strength levels. But with our method, it becomes poss...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(75)90036-0
更新日期：1975-09-01 00:00:00
abstract：:In the present paper, we report the first results concerning a centimetre cantilever driven through non-linear effects in thin magnetostrictive films. Bimorph centimetre beams (24 mm x 5 mm) were designed using 160 microns thick glass and 0.4 micron thick multilayer TbFe/Fe films deposited via RF sputtering, using sev...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00061-x
更新日期：2000-03-01 00:00:00
abstract：:Most methods used to measure the thickness of thin liquid or solid surface films and coatings need access to the coated surface. In this work reflected ultrasonic pulses were used to measure a coating thickness from a solid back face. Piezoelectric transducers on the solid back face emitted ultrasound waves and receiv...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106291
更新日期：2021-02-01 00:00:00
abstract：:The motivation for this research stems from a need for providing a non-destructive testing method capable of detecting and locating any defects and microstructural variations within armour ceramic components before issuing them to the soldiers who rely on them for their survival. The development of an automated ultras...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.05.027
更新日期：2015-09-01 00:00:00
abstract：:Our objective was to investigate whether hemorrhage control can be achieved faster when high-intensity focused ultrasound (HIFU) is applied in the presence of ultrasound contrast agents (UCA) as compared to HIFU only application. Incisions (3 cm long and 0.5 cm deep) were produced in the livers of anesthetized rabbits...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.07.018
更新日期：2006-12-01 00:00:00
abstract：:In many ultrasonic applications frictional effects play an important role (e.g. ultrasonic machining, ultrasonic motors). For optimising the applications in terms of quality, efficiency and lifetime it is important to understand the frictional coupling of the vibrating and the non-vibrating part. This contribution is ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00126-9
更新日期：2002-05-01 00:00:00
abstract：:In this paper, we investigated theoretically and experimentally the effect of the conductivity of the film located in the immediate vicinity of the free side of a piezoelectric resonator based on the PZT ceramics on its characteristics. It is shown that with increasing the conductivity of the film at first the paralle...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.09.016
更新日期：2019-04-01 00:00:00
abstract：:The main component of every device used for investigating internal object structure by Ultrasound Transmission Tomography (UTT) is a special ultrasonic probe. This paper presents the structure of model multielement ring probe for examining objects using this method in divergent ray projection geometry. The probe is ma...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.126
更新日期：2006-12-22 00:00:00
abstract：:An ultrasonic probe consisting of two optical fiber-based miniaturized transducers for wideband ultrasound emission and detection is employed for the characterization of in vitro biological tissues. In the probe, ultrasound generation is obtained by thermoelastic emission from patterned carbon films in Micro-Opto-Mech...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.11.024
更新日期：2017-03-01 00:00:00
abstract：:The objective was to use multiple paths through the slurry to determine the lowest concentration that provided accurate attenuation measurements and to measure the velocity of sound through an effective long path. Ultrasonic attenuation measurements were obtained for slurries of silica (10 microm diameter) in water fo...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.024
更新日期：2006-12-22 00:00:00
abstract：:Elastography is an imaging technique based on strain estimation in soft tissues under quasi-static compression. The stress is usually created by a compression plate, and the target is imaged by an ultrasonic linear array. This configuration is used for breast elastography, and has been investigated both theoretically ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00228-7
更新日期：2002-05-01 00:00:00
abstract：:This work was devoted to the development of a health monitoring system assigned to aerospace applications. Those applications concerned the detection of damaging impacts and debonding between stiffeners and composite skins, since they are the major causes of in-service damage of aircraft structures. The chosen health ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.01.058
更新日期：2004-04-01 00:00:00
abstract：:It is necessary to identify speckled regions in ultrasound images to control adaptive speckle suppression algorithms, for tissue characterisation, and to estimate the elevational separation of B-scans by speckle decorrelation. Previous authors have proposed classification techniques based on second order powers of the...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00104-x
更新日期：2002-05-01 00:00:00
abstract：:The paper investigates the existence of interfacial (Stoneley-type) acoustic waves localised at the internal boundary between two semi-infinite superlattices which are adjoined with each other to form one-dimensional phononic bicrystal. Each superlattice is a periodic sequence of perfectly bonded homogeneous and/or fu...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106237
更新日期：2021-01-01 00:00:00
abstract：:The main challenge faced by 3D ultrasonic imaging with 2D array transducers is the large number of elements required to achieve an acceptable level of quality in the images. Therefore, the optimisation of the array layout, in order to reduce the number of active elements in the aperture, has been a research topic in t...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2009.09.010
更新日期：2010-02-01 00:00:00
abstract：:Knowing the low-frequency response of hydrophones, down to 100 kHz at least, is important for accurate biomedical ultrasound measurements. However, current international standards do not extend below 500 kHz. Furthermore, commercial hydrophone sources typically do not supply sensitivity data below 1-2 MHz. Therefore, ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2003.12.008
更新日期：2004-04-01 00:00:00
abstract：:When casting ceramic items in potteries, liquid 'slip' is passed from a settling tank, through overhead pipelines, before being pumped manually into the moulds. It is not uncommon for bubbles to be introduced into the slip as it passes through the complex piping network, and indeed the presence of bubbles is a major s...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2009.07.008
更新日期：2010-01-01 00:00:00
abstract：:This paper presents a novel linear piezoelectric motor which is suitable for rapid ultra-precision positioning. The finite element analysis (FEA) was applied for optimal design and further analysis, then experiments were conducted to investigate its performance. By changing the input signal, the proposed motor was fou...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.07.010
更新日期：2016-12-01 00:00:00
abstract：:Measurements of elastic constants of the austenite phase when approaching the phase transformation either upon cooling or stressing is of the crucial interest for the shape memory alloy field. Acoustic properties (wave velocity and also attenuation changes) of the Cu-Al-Ni single crystal were investigated in situ duri...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.01.029
更新日期：2004-04-01 00:00:00
abstract：:A surface ultrasonic wave approach was presented for measuring surface stress of brush electro-plating nickel coating specimen, and the influence of coating thickness on surface stress measurement was discussed. In this research, two Rayleigh wave transducers with 5MHz frequency were employed to collect Rayleigh wave ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2012.02.003
更新日期：2012-09-01 00:00:00
abstract：:Focused ultrasound holds promise in a large number of therapeutic applications. It has long been known that high intensity focused ultrasound can kill tissue through coagulative necrosis. However, it is only in recent years that practical clinical applications are becoming possible, with the development of high power ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.04.003
更新日期：2004-08-01 00:00:00
abstract：:The T-matrix approach is used to calculate the scattering of sound waves by an ellipsoidal void in a fluid. Results are presented for the total cross-section of a sphere as a function of frequency; this is related to the detection of the onset of bends in divers. Results are also presented for the angular variation in...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(83)90073-2
更新日期：1983-07-01 00:00:00
abstract：:This paper presents a method which combines electromagnetic simulation and ultrasonic simulation to build EMAT array models. For a specific sensor configuration, Lorentz forces are calculated using the finite element method (FEM), which then can feed through to ultrasonic simulations. The propagation of ultrasound wav...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.10.020
更新日期：2016-03-01 00:00:00
abstract：:Angle beam wedge transducers are widely used in nonlinear Rayleigh wave experiments as they can generate Rayleigh wave easily and produce high intensity nonlinear waves for detection. When such a transducer is used, the spurious harmonics (source nonlinearity) and wave diffraction may occur and will affect the measure...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.05.004
更新日期：2018-09-01 00:00:00
abstract：OBJECTIVES:This paper aims to apply median filters for reducing interpolation error and improving the quality of 3D images in a freehand 3D ultrasound (US) system. BACKGROUND AND MOTIVATION:Freehand 3D US imaging has been playing an important role in obtaining the entire 3D impression of tissues and organs. Reconstruc...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2007.11.005
更新日期：2008-07-01 00:00:00
abstract：:Elasticity assessment based on bulk wave velocity (BWV) measurements is the most popular technique to characterize the anisotropic stiffness tensor in cortical bone. Typically, a cuboid bone specimen is cut with its sides along the different anatomical directions. Then, the velocity of shear and longitudinal waves pro...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.05.009
更新日期：2017-09-01 00:00:00
abstract：:Ultrasound image guided brain surgery (UGBS) requires an automatic and fast image segmentation method. The level-set and active contour based algorithms have been found to be useful for obtaining topology-independent boundaries between different image regions. But slow convergence limits their use in online US image s...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106304
更新日期：2021-03-01 00:00:00
abstract：:In this paper, an improved touch probe sensor device for higher sensitivity and low contact force is reported. In order to improve the resolution, we have evaluated the sensitivity and fabricated a miniaturized sensor. The sensor transducer was 3 mm long and had higher resonance frequency. The resonance frequency of t...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00091-4
更新日期：2002-05-01 00:00:00
abstract：:This paper describes ultrasonic measurements of normal and tangential stiffnesses of the contacting interface between polished aluminum blocks subjected to nominal contact pressures up to about 3.8 MPa. These stiffnesses were evaluated by ultrasonic spectroscopy methods for the bulk (longitudinal and transverse) wave ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2007.08.005
更新日期：2007-12-01 00:00:00
abstract：:This article describes the use of the frequency domain finite element (FDFE) technique for guided wave mode selection in inhomogeneous waveguides. Problems with Rayleigh-Lamb and Shear-Horizontal mode excitation in isotropic homogeneous plates are first studied to demonstrate the application of the approach. Then, two...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.12.007
更新日期：2016-04-01 00:00:00
