Results 11 to 20 of about 1,129,305 (370)
Journal of Petroleum Exploration and Production Technology, 2019 Structural interpretation and inversion analysis were used to characterize hard-to-image reservoirs, to predict subsurface interwell reservoir properties for optimum reservoir heterogeneity description, and to fine-tune drilling locations in ‘DJ’ Field ...
Ayodeji Alabi, Pius Adekunle Enikanselu
doaj +2 more sources
Enhancement of Ultrasonic Transducer Bandwidth by Acoustic Impedance Gradient Matching Layer. [PDF]
Sensors (Basel), 2022 High-performance broadband ultrasound transducers provide superior imaging quality in biomedical ultrasound imaging. However, a matching design that perfectly transmits the acoustic energy between the active piezoelectric element and the target medium ...
Zhu K +6 more
europepmc +2 more sources
Acoustic behavior of composites with gradient impedance
Materials & Design, 2020 Conventional acoustic materials with uniform media which are of fixed impedance and density are unable to satisfy the requirements of the development of modern acoustic technology in volume, weight, pressure resistance and stealth performance.
Yiwen Feng, Jing Qiao, Longqiu Li
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Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces. [PDF]
Sensors (Basel), 2020 The knowledge of the acoustic impedance of a material allows for the calculation of its acoustic absorption. Impedance can also be linked to structural and physical proprieties of materials.
Bianco F +5 more
europepmc +2 more sources
Acoustic impedance matched buffers enable separation of bacteria from blood cells at high cell concentrations. [PDF]
Sci Rep, 2018 Sepsis is a common and often deadly systemic response to an infection, usually caused by bacteria. The gold standard for finding the causing pathogen in a blood sample is blood culture, which may take hours to days. Shortening the time to diagnosis would
Ohlsson P +3 more
europepmc +2 more sources
An Overview of Acoustic Impedance Measurement Techniques and Future Prospects
Metrology, 2021 In order to progress in the area of aeroacoustics, experimental measurements are necessary. Not only are they required for engineering applications in acoustics and noise engineering, but also they are necessary for developing models of acoustic ...
Nandeesh V. Hiremath +3 more
semanticscholar +1 more source
Semi-supervised learning for acoustic impedance inversion [PDF]
SEG technical program expanded abstracts, 2019 Recent applications of deep learning in the seismic domain have shown great potential in different areas such as inversion and interpretation. Deep learning algorithms, in general, require tremendous amounts of labeled data to train properly. To overcome
Motaz Alfarraj, G. AlRegib
semanticscholar +1 more source
Broadband impedance modulation via non-local acoustic metamaterials
National Science Review, 2021 Causality of linear time-invariant systems inherently defines the wave-matter interaction process in wave physics. This principle imposes strict constraints on the interfacial response of materials on various physical platforms.
Zhiling Zhou +4 more
semanticscholar +1 more source
Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers [PDF]
, 2009 Conventionally, in order to acoustically match thickness mode piezoelectric transducers to a low acoustic impedance load medium, multiple quarter wavelength (QW) matching layers are employed at the front face of the device.
Hayward, Gordon +6 more
core +1 more source
Measurement of Acoustic Impedance [PDF]
The Journal of the Acoustical Society of America, 1939 Apparatus developed for determining acoustic impedance will be described and demonstrated. The device is the acoustical equivalent of an electrical transmission line.
W. M. Hall, R. D. Fay
openaire +2 more sources