acoustic+scattering

См. также в других словарях:

• Scattering — is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight trajectory by one or more localized non uniformities in the medium through which they pass. In… …   Wikipedia

• Acoustic Radiation Force Impulse (ARFI) Imaging — uses acoustic radiation force to generate images of the mechanical properties of soft tissue. How it worksAcoustic radiation force is a phenomenon associated with the propagation of acoustic waves in attenuating media. Attenuation includes both… …   Wikipedia

• Acoustic microscopy — Introduction = Acoustic microscopes employ very high or ultra high frequency ultrasound. These microscopes operate nondestructively and penetrate most solid materials to make visible images of internal features, including defects such as cracks,… …   Wikipedia

• Brillouin scattering — Brillouin scattering, named after Léon Brillouin, occurs when light in a medium (such as air, water or a crystal) interacts with time dependent optical density variations and changes its energy (frequency) and path. The density variations may be… …   Wikipedia

• Radio acoustic sounding system — A radio acoustic sounding system (RASS) is a system for measuring the atmospheric lapse rate using backscattering of radio waves from an acoustic wave front to measure the speed of sound at various heights above the ground. This is possible… …   Wikipedia

• Carrier scattering — Defect types include atom vacancies, adatoms, steps, and kinks which occur most frequently at surfaces due to finite material size causing crystal discontinuity. What all types of defects have in common, whether they be surface or bulk, is that… …   Wikipedia

• Small-angle scattering — (SAS) is a scattering technique based on the deflection of a beam of particles, or an electromagnetic or acoustic wave, away from the straight trajectory after it interacts with structures that are much larger than the wavelength of the radiation …   Wikipedia

• Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …   Wikipedia

• Faisceau de Bessel — Un faisceau de Bessel est un champ de radiations électromagnétiques[1],[2],[3], acoustiques ou gravitationnelles dont l amplitude suit une fonction de Bessel de première espèce. Pour le faisceau de Bessel d ordre zéro, l amplitude est maximale à… …   Wikipédia en Français

• undersea exploration — Introduction       the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments       Included in the scope of undersea exploration are the physical and chemical… …   Universalium

• Numerische Dispersion — Als numerische Dispersion wird bei der numerischen Lösung von partiellen Differentialgleichungen ein Diskretisierungsfehler von 3. Ordnung im Raum bezeichnet. Dies wird dazu benutzt, den Diskretisierungsfehler nicht nur quantitativ, sondern… …   Deutsch Wikipedia