نتایج جستجو برای: vector wave functionsvwf
تعداد نتایج: 409708 فیلتر نتایج به سال:
In this work, we calculated the phonon dispersion of GaNNTs (4,0) and (4,4) by quantum ESPRESSO package using Density Functional Theory (DFT), pseudo potentials, and plane wave self-consistent field (PWscf) method. For the purpose of lattice-dynamical calculation and phononic properties, we used PWscf and Phonon codes. The former produces the self-consistent electronic and all related computati...
The present work introduces a modified scheme for the solution of compressible 2-D full Navier-Stokes equations, using Flux Vector Splitting method. As a result of this modification, numerical diffusion is reduced. The computer code which is developed based on this algorithm can be used easily and accurately to analyze complex flow fields with discontinuity in properties, in cases such as shock...
in this thesis our aim is to construct vector field in r3 for which the corresponding one-dimensional maps have certain discontinuities. two kinds of vector fields are considered, the first the lorenz vector field, and the second originally introced here. the latter have chaotic behavior and motivate a class of one-parameter families of maps which have positive lyapunov exponents for an open in...
The present work introduces a modified scheme for the solution of compressible 2-D full Navier-Stokes equations, using Flux Vector Splitting method. As a result of this modification, numerical diffusion is reduced. The computer code which is developed based on this algorithm can be used easily and accurately to analyze complex flow fields with discontinuity in properties, in cases such as shock...
In this work the production of vector mesons in diffractive DIS is analyzed, with an emphasis on the impact of the internal spin structure of a vector meson upon its virtual photoproduction rate. For the first time, the full sets of s-channel helicity conserving and violating amplitudes were derived for pure S and D wave vector mesons. In the course of analytical and numerical investigation, we...
Ja n 19 99 FZJ - IKP - 99 / 04 Diffractive S and D – wave vector mesons in deep inelastic scattering
We derive helicity amplitudes for diffractive leptoproduction of the S and D wave states of vector mesons. We predict a dramatically different spin dependence for production of the S and D wave vector mesons. We find very small R = σL/σT and abnormally large higher twist effects in production of longitudinally polarized D-wave vector mesons. Diffractive vector meson production γ∗ + p→ V + p′, i...
We derive helicity amplitudes for diffractive leptoproduction of the S and D wave states of vector mesons. We predict a dramatically different spin dependence for production of the S and D wave vector mesons. We find very small R = σL/σT and abnormally large higher twist effects in production of longitudinally polarized D-wave vector mesons. Diffractive vector meson production γ∗ + p→ V + p′, i...
[1] The dependence of the air-sea momentum flux on surface wave fields is investigated at very high winds under tropical cyclones. A coupled wave-wind model is applied to estimate the momentum flux under ten hurricanes in the western Atlantic Ocean during 1998–2003. The model explicitly calculates the wave-induced stress vector and the total wind stress vector from a given wind speed vector and...
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