Results 41 to 50 of about 1,549,653 (180)
Effect of the pulse trajectory on ultrasonic fluid velocity measurement [PDF]
Experiments in Fluids, 2007 In a general situation a non-uniform velocity field gives rise to a shift of the otherwise straight acoustic pulse trajectory between the transmitter and receiver transducers of a sonic anemometer. The aim of this paper is to determine the effects of trajectory shifts on the velocity as measured by the sonic anemometer.
Franchini Longhi, Sebastian Nicolas +2 more
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Mathematical model for predicting the ultrasonic pulse velocity of concrete
Cogent Engineering, 2023 AbstractThis paper proposes a mathematical model approach to predict the Ultrasonic Pulse Velocity (UPV) of concrete. This paper presents the formulation, calibration, evaluation, and validation of the proposed UPV model. An experimental program was developed to calibrate and evaluate the proposed model.
Fayez Moutassem, Issam Miqdadi
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Global distributions of age- and sex-related arterial stiffness: systematic review and meta-analysis of 167 studies with 509,743 participants [PDF]
, 2023 Background: Arterial stiffening is central to the vascular ageing process and a powerful predictor and cause of diverse vascular pathologies and mortality.
Kiechl S +7 more
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, 2006 This paper presents an experimental study to investigate the suitability of thick-film ultrasonic transducers for composition measurements in heterogeneous mixtures. Following on from earlier developments [G. Meng, A.J. Jaworski, T. Dyakowski, J.M. Hale,
Jaworski, Artur +2 more
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The development of an ultrasonic Doppler bed-load velocimeter [PDF]
, 1989 Includes bibliography.A instrument has been developed for measuring the velocity of solid particles adjacent to the pipe wall in a solids-liquid pipeline.
Lazarus, Mark Doron
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Methodology for Determining the Correct Ultrasonic Pulse Velocity in Concrete
BuildingsQuite often, concrete strength parameters must be determined in the shortest possible time. Due to the strong correlation between concrete’s mechanical and acoustic properties, ultrasonic devices can be used for this purpose. However, the ultrasonic pulse velocity (UPV) is influenced by a variety of factors, including the curing and exploitation ...
Uldis Lencis +3 more
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Investigation of Concrete Segregation by Ultrasonic Pulse Velocity
Journal of Architectural Engineering Technology, 2017 Segregation is the separation of the components of fresh concrete or mortar, which can be caused by bad proportioning, insufficient mixing or excessive vibration. There are several tests which can be measured on hardened concrete or at the beginning of hardening. These are generally based on the percentage of the Fine aggregates between the top and the
Grini Abdelouaheb, Benouis Abdelhalim
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Journal of Engineering and Sustainable Development, 2014 The concrete is tested non destructively to determine its mechanical properties (compressive strength) which is considered as the main property and the parameter used in its evaluation.
Laith A. Al-jaberi, Asmaa Mahdi Ali
doaj
Analysis of the Stress-Strain State of operated reinforced Concrete Structures Using Ultrasound
Вестник Дагестанского государственного технического университета: Технические наукиObjective. Research and analysis of parameters of the stress-strain state of reinforced concrete beams using periodic ultrasonic testing in compressed and tensile zones and development of proposals for the application of the method in the inspection and ...
G. V. Nesvetaev +4 more
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Influence of Ultrasonic Treatment on the Sedimentation Performance of Slime
Kuangchan zonghe liyongThis is an article in the field of mining engineering. Kaolinite and montmorillonite are the main clay minerals in coal slime, and clay minerals are the main factors affecting the sedimentation of coal slime.
Xiaobin ZHANG +4 more
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