Počet záznamů: 1

Weak anisotropy-attenuation parameters

  1. 1.
    0330515 - GFU-E 2010 RIV US eng J - Článek v odborném periodiku
    Vavryčuk, Václav
    Weak anisotropy-attenuation parameters.
    Geophysics. Roč. 74, č. 5 (2009), WB203-WB213 ISSN 0016-8033
    Grant CEP: GA AV ČR IAA300120801
    Grant ostatní: EC(XE) MTKI-CT-2004-517242
    Výzkumný záměr: CEZ:AV0Z30120515
    Klíčová slova: weak anisotropy parameters * weak anisotropy-attenuation parameters * seismic waves
    Kód oboru RIV: DC - Seismologie, vulkanologie a struktura Země
    Impakt faktor: 1.662, rok: 2009

    Velocity anisotropy and attenuation in weakly anisotropic and weakly attenuating structures can be treated uniformly using weak anisotropy-attenuation (WAA) parameters. The WAA parameters are constructed in away analogous to weak anisotropy (WA) parameters designed for weak elastic anisotropy. The WAA parameters generalize WA parameters by incorporating attenuation effects. They can be represented alternatively by one set of complex values or by two sets of real values. Assuming high-frequency waves and using the firstorder perturbation theory, all basic wave quantities such as the slowness vector, the polarization vector, propagation velocity, attenuation, and the quality factor are linear functions ofWAAparameters. Numerical modeling shows that perturbation equations have different accuracy for different wave quantities. The propagation velocity usually is calculated with high accuracy.
    Trvalý link: http://hdl.handle.net/11104/0176290