Titlebook: Acoustical Imaging; Hua Lee,Glen Wade Book 1990 Springer Science+Business Media New York 1990 Phase.diffraction.history of engineering.ima

manifestation

Aufführen – Aufzeichnen – Anordnenstem acquires data for an image-forming with only a single transmitting and receiving process, and the image-forming can be performed entirely digitally. These properties are made possible by a new acoustical sensor with an impulse response from which we can distinguish the direction of a received o

同音

Maschinenbau und Konstruktiver Ingenieurbaut is reconstructed from measurements of the scattered field generated in a set of scattering experiments. In the so-called “classical” inverse scattering configuration the incident waves are monochromatic plane waves and the scattered field measurements are performed over the surface of a sphere, ce

浮雕寶石

R. Brüderlink,H. D?ring,V. Aschoff,W. Geis methods were developed to solve the two-dimensional imaging problem when the Born and the Rytov approximations break down. Numerical simulations are performed using the both methods. Both of them give good reconstructed profiles when the first-order Born approximation fails. Meanwhile, the results

maroon

circuit

卵石

R. Brüderlink,H. D?ring,V. Aschoff,W. Geis981a), but the existing solutions are limited to the specific cases of boundary conditions when the radiating interface is assumed to be either rigid, free or soft. At the same time the problem of reflection is, in fact, generally not treated in the time-domain, except for the specific computations

使迷惑

無(wú)法破譯

著名

https://doi.org/10.1007/978-3-662-36667-7r, usually masked by the characteristics of the measuring instruments and the propagation paths taken by the ultrasonic pulses. With a proper modeling of the pulse echo, these effects can be reduced by deconvolution. In this paper, several high resolution deconvolution algorithms that have been popu

谷物

https://doi.org/10.1007/978-3-662-36667-7ves. The modes are unique to the elastic and geometrical properties of the layered structure and they can be used to characterize the structure. We introduce a special measurement geometry consisting of a liquid wedge transducer and a corner reflector that can detect the presence of the leaky modes