Results 251 to 260 of about 1,890,515 (294)

Random Walks in Random Media on a Cayley Tree

Ukrainian Mathematical Journal, 2001
Summary: We describe sufficient conditions of the transience for random walks with bounded jumps in random media on the Cayley tree.
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Random walks in random media with random signs

Physica A: Statistical Mechanics and its Applications, 1991
Abstract Monte Carlo calculations indicate that the transverse displacement and free energy fluctuations of 1 + 1 dimensional directed random walks in media with sign randomness are characterized by the same exponents as directed walks in ordinary random media, with positive statistical weights.
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Random walks in fluctuating random media

1996
Summary: We consider a discrete-time random walk on the lattice \(\mathbb{Z}^\nu\), in mutual interaction with a fluctuating random environment. We extend previous results on the validity of the central limit theorem for the displacement of the random walk.
BERNABEI, Maria Simonetta, C. BOLDRIGHINI   +1 more
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Phase ordering in random media

Physical Review B, 1993
The phase-ordering process in random media, which alters the local exchange coupling, is studied with the nonconserved time-dependent Ginzburg-Landau model. At the late stage of phase ordering the effects of randomness, which are not sufficiently strong to destroy long-range order are essential when the spatial dimension d is less than 4.
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Modes in Random Media

Frontiers in Optics 2010/Laser Science XXVI, 2010
The transmitted speckle pattern of localized microwave radiation is decomposed into the underlying modes. Strong correlation is found between neighboring modes.
Azriel Z. Genack, Jing Wang
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Deformation of Solitons in Random Media

Journal of the Physical Society of Japan, 1990
Summary: A nonlinear partial differential equation which describes wave propagations is random media is presented. Under the assumption of Gaussian white randomness, it is shown that the amplitude of a soliton decreases asymptotically as \(x^{-1/2}\), \(x\) being the distance of the propagation.
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Intermittency in random media

Uspekhi Fizicheskih Nauk, 1987
Some specific structures in which a growing quantity reaches record high values typically arise for instabilities in random media. Despite the rarity of these concentrations, they dominate the integral characteristics of the growing quantity (the mean value, the mean square value, etc.).
Ya B Zel'dovich, S A Molchanov, A A Ruzmaĭkin, Dmitrii D Sokolov   +3 more
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Diverse Manifolds in Random Media

Physical Review Letters, 1989
We suggest a unifying perspective of various manifolds subject to quenched correlated disorder. The new picture incorporates seemingly disparate problems as domain walls in impurity-stricken Ising magnets and directed walks upon random lattices.
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Time Reversal and Refocusing in Random Media

SIAM Journal on Applied Mathematics, 2003
Summary: In time reversal acoustics experiments, a signal is emitted from a localized source, recorded at an array of receivers, time reversed, and finally reemitted into the medium. A celebrated feature of time reversal experiments is that the refocusing of the reemitted signals at the location of the initial source is improved when the medium is ...
Guillaume Bal, Leonid Ryzhik
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Imaging in random media

The Journal of the Acoustical Society of America, 2001
We present a general method for estimating the location of small scatterers buried in a random, weakly scattering medium, using an active antenna array. The main features of this method are (i) an arrival time analysis of the echo received from the scatterers, (ii) a singular value decomposition of the array response matrix in the frequency domain, and
Liliana Borcea, James Berryman, George Papanicolaou, Chrysoula Tsogka   +3 more
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