Results 101 to 110 of about 664,027 (290)
Ultrasonic calibration device [PDF]
, 1973 Device is an instrument for producing known changes in both acoustic absorption and phase velocity. Calibration signal arises from actual change of acoustic parameters, not from electrical simulation. Instrument is able to simulate changes in sensitivity
Heyman, J. S., Miller, J. G.
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Ultrasonic selective hypophysectomy [PDF]
Ultrasonics, 1967 Up to now, new su rg i ca l appl ica t ions of u l t r a sound which have appea red ve ry p r o m i s i n g a r e hypophysectomy; l a rynx pap i l lotomy, by d i r ec t appl ica t ion of the probe (through d i r e c t la ryngoscopy) to the papi l loma; t r i g e m i n a l p r i m a r y neura lg ia , through d i r e c t appl ica t ion of the p robe to ...
openaire +4 more sources
Advanced Engineering Materials, EarlyView.Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin +5 more
wiley +1 more source
Robust position control of ultrasonic motor using VSS observer [PDF]
, 2010 Intrinsic properties of ultrasonic motor (high torque for low speed, high static torque, compact in size, etc.) offer great advantages for industrial applications. However, when load torque is applied, dead-zone occurs in control input.
Darba, Araz +4 more
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Advanced Engineering Materials, EarlyView.The subject of this work is the development of a corrosion‐protective coating on steel sheets for form hardening. Rapid heating in an extreme high vacuum (XHV)‐adequate atmosphere is a useful method to prevent oxidation during alloying of 22MnB5 and aluminum to obtain a metallurgical bonding.
Lorenz Albracht +5 more
wiley +1 more source
Scientific ReportsBased on the ultrasonic welding technology, this study uses three different welding widths to weld copper cables with different specifications. The influence of welding width on the mechanical properties and microstructure of each group of welded joints ...
Yongqi Zhang +7 more
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Correlations among ultrasonic propagation factors and fracture toughness properties of metallic materials [PDF]
Empirical evidence was developed to show that a close relation exists among fracture toughness, yield strength, and ultrasonic attenuation properties of metallic materials.
Vary, A.
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Advanced Engineering Materials, EarlyView.New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold +2 more
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Advanced Engineering Materials, EarlyView.This study develops sustainable MgO–C refractories using recycled materials and eco‐friendly fructose–tannin binders. The enhanced performance of citric acid as a cross‐linker and functional additives on mechanical and thermomechanical properties was examined. Characterization included strength tests, immersion trials, and microstructural and inclusion
Dinesh K. Gunasekar +7 more
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BMC Cardiovascular DisordersBackground The purpose of this study was to review echocardiography-based diagnosis of persistent fifth aortic arch (PFAA) in children. Methods From January 2015 to December 2022, we retrospectively analyzed the echocardiographic findings and the ...
Rui Yuan, Hezhou Li, Juan Wu, Xing Yin
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