Results 221 to 230 of about 17,125 (245)
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Measurement of Drag Torque, Lift off Speed and Rotordynamic Force Coefficients in a Shimmed BFB
2015Oil free microturbomachinery relies on gas bearings, in particular bump type foil bearings (BFBs), to make nearly frictionless systems with improved efficiency, long life and extended maintenance intervals. Rotors supported on generation I BFBs often show large amplitude sub synchronous whirl motions that limit their application into high speed ...
Luis San Andrés, Joshua Norsworthy
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IEEE Electron Device Letters, 1985
A new self-aligned substitution gate process, which uses a dual-level resist (photoresist/polymethylmethacrylate (PMMA)) and a double lift-off technique has been successfully developed for the fabrication of MESFET circuits on 3-in GaAs wafers. Good device uniformity (20-mV standard deviation of threshold voltage) and excellent device characteristics (
M.F. Chang +6 more
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A new self-aligned substitution gate process, which uses a dual-level resist (photoresist/polymethylmethacrylate (PMMA)) and a double lift-off technique has been successfully developed for the fabrication of MESFET circuits on 3-in GaAs wafers. Good device uniformity (20-mV standard deviation of threshold voltage) and excellent device characteristics (
M.F. Chang +6 more
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SAE Technical Paper Series, 2017
<div class="section abstract"><div class="htmlview paragraph">Lift-off length is defined as the distance from injector hole to the location where flame stabilized on a high injection pressure direct injection (DI) diesel spray. In this paper we used the high-speed (40 kHz) Schlieren and time-averaged OH chemiluminescence imaging technique ...
Yijie Wei, Tie Li, Bin Wang, Weiquan Shi
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<div class="section abstract"><div class="htmlview paragraph">Lift-off length is defined as the distance from injector hole to the location where flame stabilized on a high injection pressure direct injection (DI) diesel spray. In this paper we used the high-speed (40 kHz) Schlieren and time-averaged OH chemiluminescence imaging technique ...
Yijie Wei, Tie Li, Bin Wang, Weiquan Shi
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Journal of Physics D: Applied Physics, 2009
Gallium nitride (GaN) films grown on sapphire substrates were successfully separated and transferred onto silicon (Si) substrates using the laser lift-off (LLO) process induced by an excimer pulsed laser. The structural and optical properties of the GaN films before and after LLO were characterized by x-ray diffraction, atomic force microscopy and ...
X L Tong +10 more
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Gallium nitride (GaN) films grown on sapphire substrates were successfully separated and transferred onto silicon (Si) substrates using the laser lift-off (LLO) process induced by an excimer pulsed laser. The structural and optical properties of the GaN films before and after LLO were characterized by x-ray diffraction, atomic force microscopy and ...
X L Tong +10 more
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Tribology International, 2019
Abstract Rotors supported by air foil journal bearings often show distinctive subharmonic oscillations arising from the nonlinear force-displacement relationship of the elastic foil structure. Also, air film induced instabilities may be observed in such bearings. A straightforward possibility to decrease the amplitude of subharmonic vibrations and to
Marcel Mahner +3 more
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Abstract Rotors supported by air foil journal bearings often show distinctive subharmonic oscillations arising from the nonlinear force-displacement relationship of the elastic foil structure. Also, air film induced instabilities may be observed in such bearings. A straightforward possibility to decrease the amplitude of subharmonic vibrations and to
Marcel Mahner +3 more
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High-speed micropatterning of oxide thin films by water lift-off with high-pressure water jet
Japanese Journal of Applied PhysicsAbstract We performed selective growth of SrRuO 3 and YBa 2 Cu 3 O 7−x (YBCO) thin films using a water lift-off process in which an amorphous SrCO
Seiya Taguchi +4 more
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Lift on a Low Speed Circular Arc Wing due to Air Compression
Natural Science, 2021Kern E Kenyon
exaly
Low speed aerodynamic performance analysis of vortex lift waveriders with a wide-speed range
Acta Astronautica, 2019Tiantian Zhang, Wei Huang, Shibin Li
exaly