Results 51 to 60 of about 3,001,234 (205)
Ultrasonic Air Coupled Transducer Output Impedance Measurement Technique
Elektronika ir Elektrotechnika, 2019 Estimation of the output impedance of ultrasonic transducers is required for electrical matching circuits design and for receiving amplifiers noise optimization.
Linas Svilainis +2 more
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Important air bases and air distances [in the Pacific Area] [cartographic material].
, 1943 [Sheet 1] is labeled 34zBH.O. Misc. 11,13034yB; Insets on "Pacific Area" sheet: Western Aleutian Islands -- Marshall and Gilbert Islands -- Bismarck Archipelago and Solomon Islands.; Also available online http://nla.gov.au/nla.map-vn4839334; National ...
United States. Air Force.
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Soil-water-air coupled finite deformation analysis considering trapped air and continuous air phases
Soils and FoundationsSince the soil–water characteristic model relates the matric suction and the water content, it cannot describe changes in the water content when the suction is zero and constant, i.e., all the pore air is trapped air.
Takahiro Yoshikawa, Toshihiro Noda
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MATEC Web of Conferences, 2018 In the aerospace industry contactless measurement has been a very versatile and adaptable in recent years, mainly because of its diverse applications. Usually ultrasonic measurement requires acoustic contact media which may disserve the sample and varies
Vyas Jaishree, Kažys Rymantas Jonas
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The application of air-coupled ultrasonic systems and signal processing to the interrogation of concrete [PDF]
This thesis describes the application of ultrasound to the interrogation of concrete for the retrieval of quantitative information. In particular the use of air-coupled ultrasound is applied for the first time with recent improvement in ultrasonic ...
Berriman, James Robert Stockwell
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Low insertion loss air-coupled ultrasonic transducer with parallel laminated piezoelectric structure
AIP Advances, 2020 This work presents a low insertion loss air-coupled ultrasonic transducer with a parallel laminated piezoelectric structure. The relevant parameters of this structure are theoretically analyzed.
Xiaoyu Wang +7 more
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Case Studies in Thermal EngineeringA fully-coupled method that integrates the compressor, inlet duct and anti-icing bleed air system (AI-BAS) was established to offer a quick prediction of the effects of anti-icing bleeding on compressor performance, facilitating the development of a ...
Zuojun Wei +3 more
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, 1994 application/pdfA set of 9 documents provided by the 190th Air Refueling Wing, Kansas Air National Guard, with resources and information for 190th Air Refueling Wing Airmen and Their Families.Air National Guard (2016) 190th Air Refueling Wing (2016 ...
Kansas. Air National Guard. Air Refueling Wing, 190th.
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Relating the ultrasonic and aerosol filtration properties of filters
Scientific ReportsNon-contact methods are useful to improve the quality control of particle filtration media. The purpose of this paper is to investigate the correlation between the filtration efficiency of a porous sheet and its ultrasonic properties obtained using a non-
Tomás E. G. Alvarez-Arenas +4 more
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EMAD: an empirical model of air-sea fluxes
Meteorologische Zeitschrift, 2005 An empirical model of daily fluxes at the sea surface is proposed. The model, referred to as EMAD (Empirical Model of Atmospheric Dynamics), concentrates on the linear dynamics of the time-varying part of the air-sea fluxes.
Jin-Song von Storch +2 more
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