density fluctuation

См. также в других словарях:

• Fluctuation theorem — The fluctuation theorem (FT) is a theorem from statistical mechanics dealing with the relative probability that the entropy of a system which is currently away from thermodynamic equilibrium (maximum entropy) will increase or decrease over a… …   Wikipedia

• Density matrix — Mixed state redirects here. For the psychiatric condition, see Mixed state (psychiatry). In quantum mechanics, a density matrix is a self adjoint (or Hermitian) positive semidefinite matrix (possibly infinite dimensional) of trace one, that… …   Wikipedia

• Detrended fluctuation analysis — In stochastic processes, chaos theory and time series analysis, detrended fluctuation analysis (DFA) is a method for determining the statistical self affinity of a signal. It is useful for analysing time series that appear to be long memory… …   Wikipedia

• Quantum fluctuation — In quantum physics, a quantum fluctuation is the temporary change in the amount of energy in a point in space, arising from Werner Heisenberg s uncertainty principle.According to one formulation of the principle, energy and time can be related by …   Wikipedia

• cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

• Exosphere — Earth atmosphere diagram showing the exosphere and other layers. The layers are to scale. From Earth s surface to the top of the stratosphere (50km) is just under 1% of Earth s radius. The exosphere is the uppermost layer of Earth s atmosphere.… …   Wikipedia

• Film grain — or granularity is the random optical texture of processed photographic film due to the presence of small grains of a metallic silver developed from silver halide that have received enough photons.RMS granularityGranularity, or RMS granularity, is …   Wikipedia

• 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

• Cosmic inflation — In physical cosmology, cosmic inflation is the idea that the universe passed through a phase of exponential expansion that was driven by a negative pressure vacuum energy density. [Liddle and Lyth (2000) and Mukhanov (2005) are recent cosmology… …   Wikipedia

• physical science, principles of — Introduction       the procedures and concepts employed by those who study the inorganic world.        physical science, like all the natural sciences, is concerned with describing and relating to one another those experiences of the surrounding… …   Universalium

• Wilkinson Microwave Anisotropy Probe — WMAP redirects here. WMAP may also refer to either radio station WXNC or WGSP FM. Wilkinson Microwave Anisotropy Probe General information NSSDC ID 2001 027A …   Wikipedia