Hypersonic velocity measurement using Brillouin scattering technique. Application to water under high pressure and temperature.

abstract：:Ultrasonic wave tunneling through seriously mismatched media, such as steel and water, is possible only when the frequency matches the resonance of the steel plate. But it is nearly impossible to realize continuous wave tunneling if the low acoustic impedance media is air because the transducer frequency cannot be mad...

journal_title：Ultrasonics

authors： Wang C,Chen Z,Cao W

更新日期：2018-01-01 00:00:00

abstract：:Estimation of the attenuation is important in medical ultrasound not only for correct time-gain compensation but also for tissue characterization. In this paper, the feasibility of a new method for attenuation estimation is tested. The proposed method estimates the attenuation by repeatedly solving the forward wave pr...

journal_title：Ultrasonics

authors： Ilyina N,Hermans J,Verboven E,Van Den Abeele K,D'Agostino E,D'hooge J

更新日期：2018-03-01 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

authors： Clement GT

更新日期：2004-08-01 00:00:00

abstract：:Diversity of acoustic streaming field in a 2D rectangular chamber with a traveling wave and using water as the acoustic medium is numerically investigated by the finite element method. It is found that the working frequency, the vibration excitation source length, and the distance and phase difference between two sepa...

journal_title：Ultrasonics

authors： Tang Q,Hu J

更新日期：2015-04-01 00:00:00

abstract：:It is now accepted that an effective way to investigate the elastic properties of soft tissues is to generate a localized transient acoustic radiation force and to follow the associated displacements in the time/space domain. Shear waves induced by this stress field are particularly interesting in this kind of medium ...

journal_title：Ultrasonics

authors： Elkateb Hachemi M,Callé S,Remenieras JP

更新日期：2006-12-22 00:00:00

abstract：:In this paper, the radial basis function (RBF) collocation method based on the nonlocal Eringen piezoelectricity theory is developed to compute the band structures of nanoscale multilayered piezoelectric phononic crystals taking account of nonlocal interface effects. Detailed calculations are performed for anti-plane ...

journal_title：Ultrasonics

authors： Yan Z,Wei C,Zhang C

更新日期：2017-01-01 00:00:00

abstract：:Transducer is the necessary and most important part in the maxonics. New applications demand for new transducer, and the renovation of the transducer will open a new field for the application of the maxonics. The important method to develop new transducer is to find and develop new material. The rare earth giant magne...

journal_title：Ultrasonics

authors： Liu W,Zhou L,Xia T,Yu H

更新日期：2006-12-22 00:00:00

abstract：:Numerical simulations of bubble oscillations in liquid water irradiated by an ultrasonic wave are performed for various acoustic amplitudes and various ambient pressures. In the numerical simulations, effect of non-equilibrium evaporation and condensation of water vapor at the bubble wall and that of chemical reaction...

journal_title：Ultrasonics

authors： Yasui K,Tuziuti T,Iida Y

更新日期：2004-04-01 00:00:00

abstract：:Ultrasound evaluation permits the state of rocks to be determined quickly and cheaply, satisfying the demands faced by today's producers of ornamental stone, such as environmental sustainability, durability and safety of use. The basic objective of the present work is to analyse and develop the usefulness of ultrasoun...

journal_title：Ultrasonics

authors： Cerrillo C,Jiménez A,Rufo M,Paniagua J,Pachón FT

更新日期：2014-01-01 00:00:00

abstract：:Single clouds of cavitation bubbles, driven by 254kHz focused ultrasound at pressure amplitudes in the range of 0.48-1.22MPa, have been observed via high-speed shadowgraphic imaging at 1×10(6) frames per second. Clouds underwent repetitive growth, oscillation and collapse (GOC) cycles, with shock-waves emitted periodi...

journal_title：Ultrasonics

authors： Johnston K,Tapia-Siles C,Gerold B,Postema M,Cochran S,Cuschieri A,Prentice P

更新日期：2014-12-01 00:00:00

abstract：:In the food industry, ultrasonic cutting is used to improve separation by a reduction of the cutting force. This reduction can be attributed to the modification of tool-workpiece interactions at the cutting edge and along the tool flanks because of the superposition of the cutting movement with ultrasonic vibration of...

journal_title：Ultrasonics

authors： Schneider Y,Zahn S,Schindler C,Rohm H

更新日期：2009-06-01 00:00:00

abstract：:The objective of this study was to examine the potential of ultrasonic velocity as a rapid and nondestructive method to predict the dimensional stability of oak (Quercus petraea (Mattuschka) Lieblein) and chestnut (Castanea sativa Mill.) that are commonly used in flooring industry. Ultrasonic velocity, specific gravit...

journal_title：Ultrasonics

authors： Dündar T,Wang X,As N,Avcı E

更新日期：2016-03-01 00:00:00

abstract：:The acoustic source localization technique for anisotropic plates proposed by the authors in an earlier publication ([1] Kundu et al., 2012) is improved in this paper by adopting some modifications. The improvements are experimentally verified on anisotropic flat and curved composite plates. Difficulties associated wi...

journal_title：Ultrasonics

authors： Nakatani H,Kundu T,Takeda N

更新日期：2014-09-01 00:00:00

abstract：:A diagnostic ultrasound method is being developed for measuring surface contact areas at the tibio-femoral interface of a total knee replacement in a non-clinical industrial setting as an engineering design tool. As an initial step towards this, a previous study mathematically predicted the effect of ultrasound beam t...

journal_title：Ultrasonics

authors： Zdero R,Fenton PV,Bryant JT

更新日期：2002-10-01 00:00:00

abstract：:Discovery and evaluation concerns of barely visible impact damage in composite materials is a well-known issue in industries using these materials. This work proposes a frequency sweep method where damage assessment is conducted with respect to the time domain. Firstly, a combined linear and nonlinear ultrasound imagi...

journal_title：Ultrasonics

authors： Malfense Fierro GP,Meo M

更新日期：2019-03-01 00:00:00

abstract：:The present paper studies experimentally and numerically the surface acoustic wave (SAW) field on a piezoelectric substrate generated by interdigital transducers (IDT). On the one hand, mechanical displacements produced by the SAW are measured with the help of a laser Doppler vibrometer. On the other hand, mechanical ...

journal_title：Ultrasonics

authors： Weser R,Darinskii AN,Weihnacht M,Schmidt H

更新日期：2020-08-01 00:00:00

abstract：:Two merits of the surface acoustic wave (SAW) device are its high energy density and small size. However, the driving frequency is around 10 MHz or higher. In spite of the difficulties involved with high frequency, the high energy density is attractive for actuator applications. The SAW linear motor's no load speed an...

journal_title：Ultrasonics

authors： Kurosawa MK

更新日期：2000-03-01 00:00:00

abstract：:The aim of this work was to show the applicability of light diffraction tomography on airborne ultrasound in the frequency range 40 kHz-2 MHz. Seven different air-coupled transducers were measured to show the method's performance regarding linearity, absolute pressure measurements, phase measurements, frequency respon...

journal_title：Ultrasonics

authors： Almqvist M,Holm A,Persson HW,Lindström K

更新日期：2000-01-01 00:00:00

abstract：:The Arg-Gly-Asp (RGD) peptide sequence was conjugated to poly (lactid acid), (PLA), microcapsules. These hollow, biodegradable PLGA microcapsules were developed in our laboratory for use as ultrasound contrast agents. By modifying the surface of the agent with a targeting ligand, it can be targeted to a specific addre...

journal_title：Ultrasonics

authors： Lathia JD,Leodore L,Wheatley MA

更新日期：2004-04-01 00:00:00

abstract：:Interference noising originating from the ultrasonic testing defect signal seriously influences the accuracy of the signal extraction and defect location. Time-frequency analysis methods are mainly used to improve the defects detection resolution. In fact, the S-transform, a hybrid of the Short time Fourier transform ...

journal_title：Ultrasonics

authors： Benammar A,Drai R,Guessoum A

更新日期：2014-02-01 00:00:00

abstract：:Lactic acid, psychrophilic, and mesophilic bacteria, Escherichia coli, Salmonella spp. and Staphylococcus aureus were enumerated on chicken breasts after treatment with different high intensity ultrasound (frequency 40 kHz, intensity 9.6 W/cm-2) application times (0, 30, and 50 min) and packaging atmospheres (aerobic ...

journal_title：Ultrasonics

authors： Piñon MI,Alarcon-Rojo AD,Renteria AL,Carrillo-Lopez LM

更新日期：2020-03-01 00:00:00

abstract：:Experimental and theoretical studies on degradation of composite-epoxy adhesive joints were carried out on samples having different interfacial and cohesive properties. Oblique incidence ultrasonic inspection of bonded joints revealed that degradation in the adhesive can be measured by significant variation in reflect...

journal_title：Ultrasonics

authors： Vijaya Kumar RL,Bhat MR,Murthy CR

更新日期：2013-08-01 00:00:00

abstract：:Guided waves propagating in cylindrical tubes are frequently applied for the characterization of material or geometrical properties of tubes. In a tube, guided waves can propagate in the axial direction and called axial guided waves, or in the circumferential direction called circumferential guided waves. Dispersion s...

journal_title：Ultrasonics

authors： Yeh CH,Yang CH

更新日期：2011-05-01 00:00:00

abstract：:The acousto-optic interaction with leaky surface acoustic wave radiation into the bulk of YX-cut LiTaO(3) crystals has been investigated. The light incidence and diffraction angles corresponding to the strongest acousto-optic interaction were calculated and measured as functions of the acoustic wave frequency. The dep...

journal_title：Ultrasonics

authors： Belovickis J,Rimeika R,Ciplys D

更新日期：2012-07-01 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

authors： Kesharaju M,Nagarajah R

更新日期：2015-09-01 00:00:00

abstract：:In many ultrasound applications-especially in the area of medical diagnostics-conventional sensors and particularly piezoelectric hydrophones do not comply with the requirements for "point detectors". It therefore suggests itself to develop methods, which allow ultrasonic fields to be reconstructed from the spatially ...

journal_title：Ultrasonics

authors： Boutkedjirt T,Reibold R

更新日期：2002-08-01 00:00:00

abstract：:The purpose of this study was to investigate practical, safe, easy-to-use, non-cytotoxic, and reliable parameters to apply to an ultrasound (US) naked gene therapy system. The ultrasound pressure at the point of cell exposure was measured using a calibrated hydrophone and the intensity calculated. An acoustic power me...

journal_title：Ultrasonics

authors： Wei W,Zhengzhong B,Yongjie W,Lafeng Y,Yalin M

更新日期：2004-12-01 00:00:00

abstract：:Many sparse signal representation (SSR) algorithms have been developed in the past decade. The advantages of SSR such as compact representations and super resolution lead to the state of the art performance of SSR for processing ultrasonic non-destructive evaluation (NDE) signals. Choosing a suitable SSR algorithm and...

journal_title：Ultrasonics

authors： Zhang GM,Zhang CZ,Harvey DM

更新日期：2012-03-01 00:00:00

abstract：:Silver epoxy was selected to bond transducer plates on glass substrates. The properties and thickness of the bonding medium affect the electrical input impedance of the transducer. Thus, the thickness of the silver epoxy bonding layer was used as a design parameter to optimize the structure for the transducer input im...

journal_title：Ultrasonics

authors： Son KT,Lee CC

更新日期：2012-04-01 00:00:00

abstract：:Current medical ultrasonic scanning instrumentation permits the display of fine image detail (speckle) which does not transfer useful information but degrades the apparent low contrast resolution in the image. An adaptive two-dimensional filter has been developed which uses local features of image texture to recognize...

journal_title：Ultrasonics

authors： Bamber JC,Daft C

更新日期：1986-01-01 00:00:00