Results 81 to 90 of about 44,850 (204)
Scientific ReportsThe high-frequency pulse flow, equivalent to the natural frequency of rocks, is generated by a self-excited oscillating cavity to achieve resonance rock-breaking.
Qiang Wu +10 more
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MachinesThis paper introduces a novel diagnostic approach called partial-discharge-activated impulse frequency response analysis (PD-IFRA), developed to overcome the limitations of conventional frequency response analysis (FRA) in detecting partial discharges ...
Bonginkosi A. Thango
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Automatic noise limiter-blanker [PDF]
A blanker system that may be used with audio noise limiters or automatic noise limiters was described. The system employs a pair of silicon diodes and two RC filters connected across the feedback impedance of an operational amplifier so as to counteract ...
Burhans, R. W.
core +1 more source
Measurement of thin films using very long acoustic wavelengths
, 2013 A procedure for measuring material thickness by means of necessarily-long acoustic wavelengths is examined. The approach utilizes a temporal phase lag caused by the impulse time of wave momentum transferred through a thin layer that is much denser than ...
Adachi, H. +3 more
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High-temperature LM cathode ion thrusters Quarterly progress report, 5 Aug. - 4 Nov. 1968 [PDF]
Thermodynamic and operating characteristics of high temperature liquid mercury cathode ion ...
Bayless, J. R., Hyman, J., Jr.
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Time and frequency characterization of the high speed I/O data bus [PDF]
, 2007 High speed data transfer between the CPU and peripherals on the PC motherboard is needed to support data traffic in future generation applications such as multimedia, games and broadband networks.
Huang, Jimmy Huat Since
core
The site of airway obstruction among patients of emphysema: Role of impulse oscillometry
Lung India, 2008 Objectives: To detect the site of airway obstruction in patients of emphysema by impulse oscillometry (IOS) and to compare its observatios with flow volume loop (FV loop) studies.
Hira H +4 more
doaj
Theoretical analysis of the electrical aspects of the basic electro-impulse problem in aircraft de-icing applications [PDF]
A method of modelling a system consisting of a cylindrical coil with its axis perpendicular to a metal plate of finite thickness, and a simple electrical circuit for producing a transient current in the coil, is discussed in the context of using such a ...
Henderson, Robert A., Schrag, Robert L.
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Studies of the acoustic transmission characteristics of coaxial nozzles with inverted velocity profiles, volume 1 [PDF]
The efficiency of internal noise radiation through coannular exhaust nozzle with an inverted velocity profile was studied. A preliminary investigation was first undertaken to: (1) define the test parameters which influence the internal noise radiation ...
Ahuja, K. K. +4 more
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Exploratory electromagnetic thruster research, phase 3, 23 June - 23 December 1969 [PDF]
Performance evaluation of MPD arc jets operating in quasi-steady ...
Ducati, A. C., Jahn, R. G.
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