In this paper, the denoising problem is tackled using a hidden Markov model with the hidden states being the unknown (noiseless) time-to-peak values. A particle filter is then used for smoothing out the time-to-
When operated at the resonance condition, a device consisting of a large number of layers produces ultrasonic waves that are highly directional in space. A structure excited by a single short pulse from a Nd:YAG laser generates a train of acoustic square waves, the pulsewidth of each being ...
What’s more, with careful control of the ultrasonic transducers, it’s possible to control the rotation of the target — allowing researchers to produce 3D scans of the insects using just one camera. There isn’t a whole lot of technical detail on the device itself, other than the fact ...
Continuous monitoring of the central blood pressure waveform from deeply embedded vessels such as the carotid artery and jugular vein has clinical value for the prediction of all-cause cardiovascular mortality. However, existing non-invasive approaches,
This paper presents the results of a series of experiments which were conducted to study the feasibility of using the photoelastic method to observe ultrasonic waves in a large plate on quantitative basis. The frequency used was as high as 0.79 MHz. Due to inherent limitations of the power of...
An apparatus for treating a patient with ultrasound waves comprises a treatment head and an amplifier receiving an input signal depending on the desired intensity of the ultrasound waves and providing an electrical output signal on its output. The treatment head can be connected to the output of ...
Today, ultrasonic(超声的) waves are being put to work in laboratories and factories. If an ultrasound generator is placed in a liquid, the waves move the liquid back and forth hundreds of thousands of times each second. This causes materials to mix quickly or to dissolve(使分解,使溶解) in...
The effectiveness of the velocity model improved when Vp was modeled as a function of these investigated parameters collectively rather than in isolation. Thus, an integrated study such as multi-regression analysis would help to present a more realistic picture that affect the relations between ...
There are 2 main types of cataract surgery. The more common type is called phacoemulsification (phaco) or "Ultrasonics." The doctor makes a tiny incision in the eye and breaks up the lens using ultrasonic waves. The lens is removed, and an intraocular lens (IOL) is put in its place. In...
During this period, the sloped wetland was irrigated via sprinklers using shallow groundwater from a well located approximately 50 m from the wetland. In April 2017, treated effluent from the wastewater treatment plant was first introduced to the horizontal levee at a total flow of 265 m3 d−...