Results 221 to 230 of about 71,101 (267)

The scattering of ultrasonic waves by polycrystals

Physica Status Solidi (a), 1981
The attenuation coefficients of longitudinal and transverse waves are calculated for polycrystals of triclinic and higher symmetries over the entire frequency range. The calculation is made in the Bourret approximation by the methods of renormalization of the wave equation and re-expansion taking account of multiple scattering, with exponential ...
O. A Grigorev, T . D Shermergor
openaire   +1 more source

Inverse scattering with diffusing waves

Journal of the Optical Society of America A, 2001
We consider the problem of imaging the optical properties of a highly scattering medium probed by diffuse light. An analytic solution to this problem is derived from the singular value decomposition of the forward-scattering operator, which leads to explicit inversion formulas for the inverse scattering problem with diffusing waves.
J C, Schotland, V A, Markel
openaire   +2 more sources

Transmittance for wave-packet scattering

Physical Review A, 1992
Different expressions for the transmittance in wave-packet scattering in one dimension are examined. Special attention is paid to the difficulties when the initial packet ρ(0) has negative momentum components. A general formula is provided for this case, and the domain of applicability of a simple approximate expression is indicated.
, Muga, , Brouard, , Snider
openaire   +2 more sources

Multiple scattering of seismic waves

Ultrasonics, 2002
We present theory and numerical simulations to model seismic wave propagation in the Earth crust. We compare them to observations made in Mexico.
N, Trégourès, R, Hennino, C, Lacombe, N M, Shapiro, L, Margerin, M, Campillo, B A, van Tiggelen   +6 more
openaire   +2 more sources

On the information content of scattered waves

2012 IEEE International Symposium on Information Theory Proceedings, 2012
A basic trade-off between spatial and frequency diversities available for communication with multiple scattered waves is presented. A rigorous notion of the total number of space-frequency degrees of freedom of the field is introduced based on Slepian's theory of spectral concentration of L2 functions. This definition agrees with the “rule of thumb” of
openaire   +1 more source

On the bound wave scattering in a wind-wave tank

2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
There exist bound gravity-capillary waves that move at the speed of dominate waves on the ocean surface, besides free gravity-capillary waves that satisfy the dispersion relation. The radar Doppler spectra are believed to be the sum of two parts: one is attributed to free waves, and the other is attributed to bound waves.
Lei Liu, Xiangzhen Yu, Xiaoqing Wang, Jinsong Chong, Wen Hong   +4 more
openaire   +1 more source

Scattering of Waves in Many Dimensions

Journal of Mathematical Physics, 1971
Scattering by a spherical potential is discussed in all dimensions by one formulation using the partial-wave expansion method. The optical theorem relating the total scattering cross section σ to the forward scattering amplitude f(0) is derived.
openaire   +2 more sources

Scattering Of Surface Waves At Anisotropic Wave Barriers

10th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1997
In this paper we consider the screening effectiveness of an infilled trench for isolation from near-surface ground-transmitted vibrations. The infilled trench is modeled by a vertical anisotropic layer embedded into an isotropic half-space. To study surface wave scattering at the layer we employ the Green’s function technique.
Elizabeth Its, Jong Lee
openaire   +1 more source

Wave Scattering by Small Bodies

Reports on Mathematical Physics, 1982
A new method for treating the many body problem for wave scattering by r small bodies is given. Formulae and numerical algorithm for the calculation of the scattering amplitude are given. The method allows for treatment of the case of \(r\sim 10^{23}\).
openaire   +2 more sources

Diffusive Waves in a Dilating Scattering Medium

Physical Review Letters, 2009
We consider the propagation of a diffusive wave in a scattering medium submitted to a homogeneous expansion. The light multiply scattered by a glass spheres sample is measured. We analyze the variations of the scattered light when the material and the optical wavelength are dilated.
Crassous, Jérôme, Erpelding, Marion, Amon, Axelle   +2 more
openaire   +2 more sources