Results 161 to 170 of about 9,025,079 (233)
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Distributed Point Source Method for CNDE
Computational Nondestructive Evaluation Handbook, 2020Sourav Banerjee, Cara A.C. Leckey
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Numerical simulation of electromagnetic acoustic transducers using distributed point source method
Ultrasonics, 2010In spite of many advances in analytical and numerical modeling techniques for solving different engineering problems, an efficient solution technique for wave propagation modeling of an electromagnetic acoustic transducer (EMAT) system is still missing.
M, Eskandarzade +4 more
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Auxiliary source point method: the Laplace equation
Engineering Analysis with Boundary Elements, 1987Abstract A new boundary collocation method is demonstrated using auxiliary source points located outside the normal boundary. It is shown that this eliminates the intermediate integration step normally found in boundary element methods and the approximating function can be found simply by a matrix inversion.
H.M. Cekirge, W.J. Lehr
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A photoacoustic image reconstruction method for point source recovery
Photons Plus Ultrasound: Imaging and Sensing 2021, 2021In this paper, a novel Delay and Glow (DAG), back projection-based photoacoustic reconstruction, for point source recovery is presented. The projections of the absorber coefficients are delayed and weighed based on the transducer directivity sensitivity and matched with the other projections from other transducer elements leading to glow the point ...
Hamid Moradi Kashkouli +3 more
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A point source/point receiver method for ultrasonic testing
1993 Proceedings IEEE Ultrasonics Symposium, 1993Much of the theory and practice of ultrasonic testing involves the use of the plane wave approximation and of transducers large enough to generate planar wavefronts. Motivated in part by the emergence of engineering materials for which conventional techniques become impractical, the research reported here addresses the use of spherical waves generated ...
N.N. Hsu, C.H. Palmer, S.E. Fick
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Science of the Total Environment, 2019
Although buffer zones around aquatic areas are a useful method for controlling non-point source pollution and restoring natural ecosystem services, proper delineation methods for lakes remain poorly defined, restricting their protection and the rational ...
Chun-hua Li +5 more
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Although buffer zones around aquatic areas are a useful method for controlling non-point source pollution and restoring natural ecosystem services, proper delineation methods for lakes remain poorly defined, restricting their protection and the rational ...
Chun-hua Li +5 more
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Journal of Cleaner Production, 2019
Nitrate pollution of groundwater has increased dramatically worldwide due to increase of population and agricultural productivity. The resulting nitrate concentration in groundwater is usually a combination of various types of point and non-point ...
A. Motevalli +5 more
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Nitrate pollution of groundwater has increased dramatically worldwide due to increase of population and agricultural productivity. The resulting nitrate concentration in groundwater is usually a combination of various types of point and non-point ...
A. Motevalli +5 more
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TIR collimator designs based on point source and extended source methods
SPIE Proceedings, 2015TIR collimator are essential illumination components demanding high efficiency, accuracy, and uniformity. Various illumination design methods have been developed for different design domains, including tailoring method, design via optimization, mapping and feedback method, and the simultaneous multiple surface (SMS) method.
T. Talpur, A. Herkommer
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