In a travelling wave tube, the wire helix is supported at a few points in each turn by a surrounding tube of, e.g. square or triangular cross-section, whereby the effect of irregularities in the supporting dielectric tube are minimized, and space is provided for the extra thickness at ...
A new approach of solving Green's function for wave propagation in an inhomogeneous absorbing medium A new approach is developed to solve the Green's function that satisfies the Hehmholtz equation with complex refractive index. Especially, the Green's func... Li,Wei,Liu,... - 《Chinese Phys...
The propagation of Love type waves in an infinite non-homogeneous circular cylinder with a central core is investigated here. The rigidity and density of the outer mentle are supposed to vary linearly with the radial distance, while those of the inner core are taken to be constant. Phase veloc...
Landau-Type Damping in Nonlinear Wavepacket Propagation A modulational instability analysis is carried out for a new kind of integro-differential nonlinear Schrdinger equation which describes nonlinear wave鈥揺n... R Fedele,D Anderson,M Lisak - 《Physica Scripta》 被引量: 17发表: 2006年 A ...
关键词: Post-Newtonian approximation perturbation theory related approximations Wave propagation and interactions 被引量: 16 摘要: We consider the propagation of gravitational waves generated by slow motion sources in a Coulomb-type potential due to the mass of the source. Then, the formula for a ...
The design was to incorporate the elevation angle of the satellite fora given location such that, when in operation, the radiation aperture isapproximately in a horizontal position, while the pointing in the azimuth plane isachieved mechanically. This thesis is an investigation of travelling-wave ...
The propagation of two-dimensional nuclear detonation waves in Type Ia supernovae is calculated from Huygens' principle and the resulting flow is then computed with a hydrodynamic code. This has the advantage that one can study asymmetric explosions using wave speeds determined from one-dimensional ...
Back azimuth propagation and a simple acoustic wave propagation model in unison with known event times were used to confirm that the planar, acoustic signals recorded at the arrays had originated from the eruptions. The infrasound array data reflected the differences in eruption styles between Okmok...
A new Boussinesq-type model for surface water wave propagation in coastal regions is derived. The model is fully nonlinear and accurate to {dollar}O(musp4)... MF Gobbi - University of Delaware. 被引量: 0发表: 1998年 A wave-breaking model for Boussinesq type equations including roller effect...
展开 关键词: convergence of numerical methods electromagnetic wave scattering image reconstruction inverse problems iterative methods tomography band limitations contrast convergence inverse-profiling problems 会议名称: Antennas & Propagation Society International Symposium 会议...