宣传
发表于 2025-3-25 07:21:40
https://doi.org/10.1007/978-3-663-13304-9nvelope and carrier frequency and one set of medium parameters at a time. Since the dependance of the propagation characteristics on these parameters is complicated, such an approach would require many calculations in order to obtain a general knowledge of dispersive pulse-propagation phenomena. The
Cacophonous
发表于 2025-3-25 10:50:14
https://doi.org/10.1007/978-3-662-32910-8mations developed on Chap.6 for the saddle-point locations and the behavior of the complex phase function φ(ω,θ)at the saddle points are used and the advanced asymptotic techniques reviewed in Chap.5 are applied. Applications of the approximations from Chap.6 yields approximate expressions describin
慢跑鞋
发表于 2025-3-25 12:57:39
https://doi.org/10.1007/978-3-322-94745-1ther the results nor their derivations have provided insight into the physical reasons for the field having the particular local properties it does in the various subregions of space moving with specific velocities.
饥荒
发表于 2025-3-25 17:00:35
https://doi.org/10.1007/978-3-322-99862-0netism. If the medium was nondispersive, an arbitrary pulse would propagate unaltered at the phase velocity of the wave field in the medium. In a dispersive medium, however, the pulse is modified as it propagates due to two fundamentally interconnected effects. First of all, each monochromatic spect
landfill
发表于 2025-3-25 21:54:31
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Magnitude
发表于 2025-3-26 04:01:28
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antiandrogen
发表于 2025-3-26 05:42:00
,Primärerhebung in der Stadt München,us, isotropic, locally linear, temporally dispersive medium is now considered. The term “free” is used here. to indicate that there are no externally supplied charge or current sources for the field present in this half-space, the field source residing somewhere in the region ∣z∣ ⩽ .. It is unnecess
我还要背着他
发表于 2025-3-26 10:30:42
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Nerve-Block
发表于 2025-3-26 13:04:39
,Die Konsolidierungen im Überblick,temporally dispersive medium, it is necessary to first determine the topography of the real part X(ω),θ) of the complex phase function φ(ω,θ), defined in (4.37), in the complex ω-plane. In particular, the location of the saddle points of φ(ω, θ), the value of φ(ω, θ) at these points, and the regions
Pseudoephedrine
发表于 2025-3-26 19:37:17
https://doi.org/10.1007/978-3-662-32910-8is presented in this chapter begins with an examination of the exact field behavior for times . such that . = ./. < 1, for a fixed observation distance .. By applying the method . used to treat the step-function modulated signal, it is shown here that for fields with the initial envelope