Results 221 to 230 of about 70,174 (264)
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The reflection of road traffic noise
Journal of Sound and Vibration, 1983Abstract In the U.K. prediction method for L 10 noise levels from road traffic single figure corrections are used to allow for the effects of reflecting facades. In this paper, simple expressions are proposed as improved corrections. These are derived for facades lying parallel to the road by using geometrical reflection theory and the equations ...
D.C. Hothersall, S. Simpson
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Multiple reflections as an additive noise limitation in seismic reflection work
Proceedings of the IEEE, 1984A principal problem in seismic exploration is the heterogeneous partially reflecting medium that makes up the transmission zone to the target reflectors of interest. Multiple reflection between the free surface and the shallower reflectors produces additive noise that interferes with our view of the bedding plane geometry and rock properties in the ...
M.M. Backus, J.L. Simmons
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White noise driven SPDEs with reflection
Probability Theory and Related Fields, 1993We study reflected solutions of a nonlinear heat equation on the spatial interval [0,1] with Dirichlet boundary conditions, driven by space-time white noise. The nonlinearity appears both in the drift and in the diffusion coefficient. Roughly speaking, at any point \((t,x)\) where the solution \(u(t,x)\) is strictly positive it obeys the equation, and ...
Donati-Martin, C., Pardoux, E.
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Effect on inlet reflections on fan noise radiation
15th Aeroacoustics Conference, 1993The purpose of this initial investigation into the effect of inlet reflections on turbofan noise radiation is to discover whether the contribution from reflected waves is sufficient to warrant the extra complexity of including reflection in prediction methodologies.
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Reflection of noise from a building's facade
Applied Acoustics, 1994The reflection from the facade of a building is considered in terms of specular reflection and diffuse scattering. Using the concept of the continuous A-weighted sound pressure level, the importance of reflected noise is evaluated by comparing it with the contribution of the direct wave and background noise.
Rufin Makarewicz, Piotr Kokowski
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Fiber Optic System Reflection Noise
SPIE Proceedings, 1990As fiber optic transmission technology matures, its development interestingly tracks that of the millimeter and microwave technology of 30 to 40 years ago. Since return loss and multipath interference were found to be of concern in those systems, it is not surprising to learn that reflections present in fiber optic spans can cause similar problems in ...
Joyce Kilmer, B. A. Mortimer
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Estimating the noise influence on recovering reflectances
SPIE Proceedings, 2010The evaluation of the noise present in the image acquisition system and the influence of the noise is essential to image acquisition. However the mean square errors (MSE) is not divided into two terms, i.e., the noise independent MSE (MSE free ) and noise dependent MSE (MSE noise ) were not discussed separately before.
Mikiya Hironaga, Noriyuki Shimano
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Reflective Learning With Label Noise
IEEE Transactions on Circuits and Systems for Video Technology, 2023Lin Wang 0004 +4 more
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WHITE NOISE DRIVEN SPDEs WITH TWO REFLECTING WALLS
Infinite Dimensional Analysis, Quantum Probability and Related Topics, 2011In this paper, we study stochastic partial differential equations with two reflecting smooth walls h1 and h2, driven by space-time white noise with non-constant diffusion coefficients. The existence and uniqueness of the solutions are established.
Zhang, Tusheng, Yang, Juan
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Reflection noise in vertical cavity surface emitting lasers
51st Annual Device Research Conference, 1993We describe the effect of back reflections on the relaxation-oscillation peaks of low threshold (<6 mA), high intrinsic bandwidth (31 GHz) vertical cavity surface emitting lasers. With the largest feedback possible with our experimental arrangement, x=−5.8 dB, the relaxation-oscillation peak breaks up into a series of sharp resonances with the ...
J. W. Bae +7 more
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