Results 251 to 260 of about 1,877,864 (293)
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Phase ordering in random media
Physical Review B, 1993The 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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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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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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Diverse Manifolds in Random Media
Physical Review Letters, 1989We 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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Random walks in fluctuating random media
1996Summary: 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 +1 more
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Random walks in symmetric random media
Russian Mathematical Surveys, 1983The paper shortly writes down several conclusions. A connection between such random walks and special so-called quasi-diffusion processes is given ({\S} 1). A general quasi-diffusion process depends on some distribution. The convergence of a sequence of distributions implies convergence of the corresponding sequence of finite-dimensional distribution ...
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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 +3 more
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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 +3 more
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Random walks in random media with random signs
Physica A: Statistical Mechanics and its Applications, 1991Abstract 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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Frontiers in Optics 2014, 2014
We find that the variation inside a random sample with depth of the contrast in focusing equals the eigenchannel participation number for the field matrix inside a random sample.
Xiaojun Cheng, Azriel Z. Genack
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We find that the variation inside a random sample with depth of the contrast in focusing equals the eigenchannel participation number for the field matrix inside a random sample.
Xiaojun Cheng, Azriel Z. Genack
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Proceedings, 2014
I will present an introduction to the mathematical theory of wave propagation in heterogeneous media with uncertain micro-scale, modelled as random media. I will summarize the scattering effects in such media and how to mitigate them in order to obtain high fidelity imaging results.
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I will present an introduction to the mathematical theory of wave propagation in heterogeneous media with uncertain micro-scale, modelled as random media. I will summarize the scattering effects in such media and how to mitigate them in order to obtain high fidelity imaging results.
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Waves in Random Media, 1993
Summary: Based on the parabolic equation, the problem of a statistical description for caustic origin in random media is considered. The method from White and co-workers [\textit{V. A. Kulkarny} and \textit{B. S. White}, Phys. Fluids 25, 1770-1784 (1982; Zbl 0531.76059); and \textit{D. I. Zwillinger} and \textit{B. S.
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Summary: Based on the parabolic equation, the problem of a statistical description for caustic origin in random media is considered. The method from White and co-workers [\textit{V. A. Kulkarny} and \textit{B. S. White}, Phys. Fluids 25, 1770-1784 (1982; Zbl 0531.76059); and \textit{D. I. Zwillinger} and \textit{B. S.
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