نتایج جستجو برای: multiple building diffractions
تعداد نتایج: 959959 فیلتر نتایج به سال:
Road traffic noise affects the quality of life in the areas adjoining the road. The effect of traffic noise on people is wide ranging and may include sleep disturbance and negative impact on work efficiency. To address the problem of traffic noise, it is necessary to estimate the noise level. For this, a number of noise estimation models have been developed which can estimate noise at the recep...
Advances in the fundamentals and applications of diffraction gratings have received much attention. However, conventional diffraction gratings often suffer from higher-order diffraction contamination. Here, we introduce a simple and compact single optical element, named inclined rectangular aperture gratings (IRAG), for quasi suppression of higher-order diffractions. We show, both in the visibl...
Wavefront healing, in which diffractions interfere with directly traveling waves causing a reduction in recorded traveltime delays, has been postulated to cause a bias towards faster estimated Earth models. This paper reviews the theory from the mathematical physics community that explains the properties of diffractions and applies it to a suite of increasingly complicated numerical examples. W...
The self-assembly of porous molecular nanocapsules offer unique opportunities to investigate a range interesting phenomena and applications. However, design with pre-defined properties, thorough understanding their structure-property relation is required. Here, we report the two elusive members Keplerate family, [Mo132Se60O312(H2O)72(AcO)30]42− {Mo132Se60} 1 [W72Mo60Se60O312(H2O)72(AcO)30]42− {...
A difficult challenge in geometrical acoustic modeling is computing propagation paths from sound sources to receivers fast enough for interactive applications. This paper describes a beam tracing method that enables interactive updates of propagation paths from a stationary source to a moving receiver in large building interiors. During a precomputation phase, convex polyhedral beams traced fro...
We demonstrate self-trapping of light by simultaneously compensating normal and anomalous (saddle-shaped) diffractions with self-focusing and self-defocusing hybrid nonlinearity in optically induced ionic-type photonic lattices. Innovative two-dimensional gap solitons, named "saddle solitons," are established, whose phase and spectrum characteristics are different from all previously observed s...
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