Results 11 to 20 of about 489,056 (215)

Mach Fronts in Random Media with Fractal and Hurst Effects [PDF]

open access: yesFractal and Fractional, 2021
An investigation of transient second sound phenomena due to moving heat sources on planar random media is conducted. The spatial material randomness of the relaxation time is modeled by Cauchy or Dagum random fields allowing for decoupling of fractal and
Junren Ran   +2 more
doaj   +4 more sources

Computer-free computational imaging: optical computing for seeing through random media [PDF]

open access: yesLight: Science & Applications, 2022
Diffractive Deep Neural Network enables computer-free, all-optical “computational imaging” for seeing through unknown random diffusers at the speed of light.
Yunzhe Li, Lei Tian
doaj   +2 more sources

Terahertz bistatic three-dimensional computational imaging of hidden objects through random media [PDF]

open access: yesScientific Reports
Random media pose limitations on the imaging capability of photoelectric detection devices. Currently, imaging techniques employed through random media primarily operate within the laser wavelength range, leaving the imaging potential of terahertz waves ...
Quanchun Yu   +5 more
doaj   +2 more sources

PRELIMINARY INVESTIGATIONS OF TRANSPORT IN HETEROGENEOUS RANDOM MEDIA [PDF]

open access: yesEPJ Web of Conferences, 2021
Random media emerge in several applications in reactor physics and safety analysis. Most often, models of stochastic media assume spatial homogeneity, whereas real-world complex materials, such as fuel chunks resulting from core degradation, typically ...
Larmier C.   +4 more
doaj   +1 more source

EFFECT OF β ON EFFECTIVE MULTIPLICATION FACTOR IN 1/fβ SPECTRUM RANDOM SYSTEM [PDF]

open access: yesEPJ Web of Conferences, 2021
We investigated the effect of β on effective multiplication factor(keff) in the 1/fβ spectrum random system. The random system was generated by the 1/fβ noise model.
Araki Shouhei   +3 more
doaj   +1 more source

Full-Wave Electromagnetic Model Simulations of P-Band Radio Signal Propagation Through Forest Using the Fast Hybrid Method

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
This article presents an analysis of P-band radio signal propagation through forest based on 3D Numerical Method of Maxwell's equations (NMM3D). The simulation domain of the forested region covers an area of 35.8 × 35.8 m2 that includes 112&
Jongwoo Jeong   +4 more
doaj   +1 more source

Propagation of 2-D SH waves in random media: Insights from ab initio numerical simulations and transport theory

open access: yesFrontiers in Earth Science, 2022
Increasing the frequency range of physics-based predictions of earthquake ground motions requires to account for small-scale heterogeneities, which can only be described in a stochastic way.
Malcon Celorio   +4 more
doaj   +1 more source

Hybrid Method for Full-Wave Simulations of Forests at L-Band

open access: yesIEEE Access, 2022
The full-wave simulations of 3D Maxwell equations of forests at L-band are carried out with a two-step hybrid method. The tallest trees considered include one 8-meter tall trunk, 18 primary branches and 108 secondary branches.
Weihui Gu   +3 more
doaj   +1 more source

Improvement of Image Classification by Multiple Optical Scattering

open access: yesIEEE Photonics Journal, 2021
Multiple optical scattering occurs when light propagates in a non-uniform medium. During the multiple scattering, images were distorted and the spatial information they carried became scrambled.
Xinyu Gao   +9 more
doaj   +1 more source

Stochastic finite elements: Where is the physics? [PDF]

open access: yesTheoretical and Applied Mechanics, 2011
The micromechanics based on the Hill-Mandel condition indicates that the majority of stochastic finite element methods hinge on random field (RF) models of material properties (such as Hooke’s law) having no physical content, or even at odds with ...
Ostoja-Starzewski Martin
doaj   +1 more source

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