Results 211 to 220 of about 27,631 (265)
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Ultrasonic vibration method and ultrasonic vibration apparatus
The Journal of the Acoustical Society of America, 2005An ultrasonic vibration method and an ultrasonic vibration apparatus, which do not have a directional property in the direction of vibrations, are disclosed. A pair of ultrasonic horns ( 11 ), ( 12 ), each having an ultrasonic vibrator ( 13 ), ( 14 ) provided at an end portion thereof, are disposed in an intersecting relationship to each other, and the
Morio Tominaga, Shinji Iwahashi
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The complex-mode vibration of ultrasonic vibration systems
Ultrasonics, 2002The longitudinal-flexural and torsional-flexural vibrations are studied for the ultrasonic solid horn and the ultrasonic vibration system comprised of a sandwich transducer and a solid horn. The discussed solid horn is of arbitrary non-uniform cross-section. The analysis on flexural-mode vibration is based on Timoshenko theory.
Guangping, Zhou +2 more
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Ultrasonic-vibration-assisted pelleting of switchgrass: Effects of ultrasonic vibration
Transactions of Tianjin University, 2011Biofuels produced from cellulosic biomass can be used to replace petroleum-based transportation fuels. However, the manufacturing cost of cellulosic biofuels is still high, partly due to the low density of cellulosic feedstocks. Pelleting of cellulosic feedstocks can increase their density, making their transportation and storage as well as biofuel ...
Weilong Cong +5 more
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Ultrasonic sensing of vibrations
Ultrasonics, 1998A noncontact system for vibration measurement using airborne ultrasound is studied as an alternative to optical techniques. An ultrasonic beam is emitted towards the moving surface and is received after reflection from the object under test. Two different physical effects contribute to the phase modulation of the received signal.
O.Bou Matar +4 more
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A.M.A. Archives of Dermatology and Syphilology, 1953
THE VIBRATIONS or wave lengths beyond those audible to the human ear (which hears vibrations of 20 to 20,000 cps) are known as ultrasonic or supersonic vibrations. These vibrations have interesting possibilities in the field of investigative dermatology.
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THE VIBRATIONS or wave lengths beyond those audible to the human ear (which hears vibrations of 20 to 20,000 cps) are known as ultrasonic or supersonic vibrations. These vibrations have interesting possibilities in the field of investigative dermatology.
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Burner with ultrasonic vibrator
The Journal of the Acoustical Society of America, 1980A burner with an ultrasonic vibrator wherein a plurality of electrostrictive vibrator elements are clamped between a front metal plenum having an atomizing surface formed at the leading end thereof and a rear metal plenum; an intermediate supporting member is joined to said front or rear metal plenum in proximity to one of said vibrator elements most ...
Katsuhiko Yamamoto +2 more
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The Ultrasonic Measurement for Object Vibration
2009This paper provides a kind of ultrasonic measurement for object vibration. Through the use of LabVIEW and ultrasonic sensors, the whole system would be simple and cost would be much lower. And then some key problems have been solved, such as the nearby wavelet produced by the ultrasonic sensor, the background noise and also the dead zone for ...
Li-Ping Zhang, Qiu Yu
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Foam Destabilization by Mechanical and Ultrasonic Vibrations
Journal of Colloid and Interface Science, 1999The need to destabilize foams and control their formation arises in many industrial applications. Vibrations are known to affect the structure and rheology of various soft solids but have not been exploited in destroying persistent foams. Being noninvasive, they offer elegant potential alternatives to chemical and mechanical foam breaking techniques ...
, Morey, , Deshpande, , Barigou
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Frictional effect of ultrasonic-vibration on upsetting
Ultrasonics, 2007The ultrasonic-vibration ring compression test and finite element analysis were performed on aluminum alloy specimens to explore the frictional effect of superimposing ultrasonic-vibration during upsetting. The extrapolated compression test was first adopted to obtain the frictionless material properties for finite element analysis.
Jung-Chung, Hung +2 more
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Ultrasonic Vibration Potentials
1982Ultrasonic vibration potentials are phenomena which result from the interaction between ultrasonic waves and electrolytic solutions in the bulk or at interfaces.1 These effects have thus far received little attention in spite of the information that can be obtained from their study and their possible applications in various fields.
Raoul Zana, Ernest B. Yeager
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