Relinquish
发表于 2025-3-23 12:57:45
Ray Optics,matical point of view, nonetheless provide approximate solutions to problems that would otherwise be intractable by using analytical or numerically rigorous techniques. In this chapter, we begin by enunciating the principles of ray optics and show how they enable us to extract the essential characteristics of various scattering phenomena.
ULCER
发表于 2025-3-23 15:23:01
Essentials of Object-Oriented Programming,nciated principles and enable us to determine the diffraction coefficients as well. We saw in Chap. 1 that, in a majority of cases, this approach not only provides useful tools for calculating the fields diffracted by an object, but also helps us to physically interpret the results in terms of rays.
不要严酷
发表于 2025-3-23 20:03:37
Book 1997ical to handle, at high frequencies and one must resort to asymptotic methods to solve the scattering problem at short wavelengths. The asymptotic methods provide closed form expansions for the diffracted fields and are also useful for eliciting physical interpretations of the various diffraction ph
BRAVE
发表于 2025-3-24 00:39:40
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纠缠
发表于 2025-3-24 04:56:00
https://doi.org/10.1007/978-94-015-7704-5or the solution. The only requirement on the solution is that we must recover the results derived by the ray method when applying the stationary phase approximation to the integral representation; the user remains free to choose the integral representation that is most convenient to him. Mathematici
原始
发表于 2025-3-24 09:56:19
https://doi.org/10.1007/978-1-4302-0077-2raction of an electromagnetic wave by an object. The technique relies upon a number of principles, which, though they may not be rigorous from a mathematical point of view, nonetheless provide approximate solutions to problems that would otherwise be intractable by using analytical or numerically ri
爱哭
发表于 2025-3-24 13:14:29
Essentials of Object-Oriented Programming,tion principle; the generalized Fermat’s principle; linear phase variation along a ray; power conservation in a tube of rays; and, polarization conservation. The GTD relies upon the known asymptotic solutions of canonical problems and these solutions play a two-fold role — they help validate the enu
感染
发表于 2025-3-24 15:45:09
https://doi.org/10.1007/978-1-4302-0077-2tion of the diffracted rays. We have also seen that the formal series provides a description of the field only in regions where it is a ray field, and in the present chapter we will concern ourselves with the calculation of the field in the boundary layers.
Mendicant
发表于 2025-3-24 20:06:54
Essentials of Object-Oriented Programming, encountered with the GTD. The basic strategy followed in STD is to represent a complex field, which is not a ray field, in terms of a superposition of plane waves. Such fields are often encountered in diffraction problems.
Decimate
发表于 2025-3-25 02:21:38
https://doi.org/10.1007/978-94-015-7704-5 field at almost all locations in space. However, its implementation becomes extremely involved in the zones where there is an overlap of several boundary layers. In particular, difficulties arise on the cusp lines of the caustic surface where the formulas of Sect. 5.7 no longer apply. A particular