semiskilled
发表于 2025-3-23 12:03:28
Spectral Synthesis and Adiabatic Invariants for Non-Uniform Waveguidesed environment. In fact, the notion of a translation invariant waveguide is an idealisation which describes exceptional, rather than generic, cases. In many cases the non-uniformity of the waveguide determines much of the physics of wave propagation in those environments; examples can be found in op
嘲笑
发表于 2025-3-23 17:42:09
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UTTER
发表于 2025-3-23 20:41:32
Ray/Mode Trajectories and Shadows in the Horizontal Plane by Ray Invariantsension was prompted by a study of long range reverberation in an ocean basin. Very long delay times and clear indications of returns from the edge of the basin are commonly seen (1), and the usual explanation for this type of return is scattering from the continental slope. Another possible explanat
Nutrient
发表于 2025-3-24 00:03:39
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小步舞
发表于 2025-3-24 02:42:45
A Spectral Extended Ray Method for Edge Diffractioning or impedance surfaces are considered. The basic high-frequency solution for single diffraction is given by either the uniform GTD or an analogous asymptotic approximation of the exact solution by Maliuzhinets. Uniform high-frequency solutions for the field scattered by double edge structures are
杀死
发表于 2025-3-24 07:18:34
Modal Edge-Diffraction Coefficients for Cylindrically and Spherically Curved Concave Surfacesrelies essentially on the notion of ray. In a homogeneous medium the rays consist of consecutive segments of straight lines, along which field values can be easily transported from one end to the other. The end points of a ray are always placed on physical obstacles on which scattering phenomena tak
Amnesty
发表于 2025-3-24 13:52:42
Numerical Computation of Elastic Wavefields in Anisotropic Elastic Media in the Presence of Causticsgiven source . and a given (often hypothetical) inhomogeneous elastic medium through which the signals propagate from . to .. At least the first 1/3 of the seis- mogram is interpretable in terms of wavefront arrivals and hence can reasonably be explained in terms of geometrical optics. Although a su
Medicaid
发表于 2025-3-24 16:36:58
Complex Raysnt source of complex location (CSP)), complex optics and related techniques have undergone great development, with a variety of applications ranging from antenna systems and radomes to integrated optics . After it was recognized that an elementary source displaced in complex space r
reception
发表于 2025-3-24 22:41:14
Imaging and Propagation of Beams in Metallic or Dielectric Waveguidesetitive cohesive patterns at certain points along the axis of the guide. This imaging property is the result of constructive interference between modes, and is mathematically related to the hybrid ray-mode formulations of Felsen and his colleagues. This paper will review the origins and applications
Stress-Fracture
发表于 2025-3-25 01:04:51
Gaussian Beam Transformation Through Lenses and by Curved Gratingsres, planar strip guides, or strip-derived structures, and then have a nearly Gaussian intensity distribution in the transverse direction parallel to the film waveguide. Film lenses and film prisms as well as gratings may serve to transform or deflect such Gaussian beams in the fundamental film mode