Phase Fluctuation Statistics
نویسنده
چکیده
Over t h e frequency range between 107 cis an d 1010 cis, r adio seein g is controll ed by t he distortions in t he phase of the waves propagating t hrough the eart h 's 'ttmo~ph el' e. For elevation angles above two degrees, t he dorn inant effect is refraction at l 00 j\[c/s, Lhe lolal bending o f abo ut one and one-half degr ees is d ivided equa ll ,v between t il(' t ropospher e and ionosphere. C ur ves s howin g t he total phase change and associatC'd r ay bl' ll d ing arC' presented for many cases of in te rest . Statis tical fluctuation s caused by i Il s tl'lI n1('11 tal ion enol's in measu ri ng t he physical properties of t he at mosphere, and by irl'cguiarilicii in th e m ed ium are s umm a rized.
منابع مشابه
Stochastic Phase - Field Simulations of Symmetric
We study initial transient stages in directional solidification by means of a non-variational phase field model with fluctuations. This model applies for the symmetric solidification of dilute binary solutions and does not invoke fluctuation-dissipation theorem to account for the fluctuation statistics. We devote our attention to the transient regime during which concentration gradients are bui...
متن کاملMonofractal Density Fluctuations and Scaling Laws for Count Probabilities and Combinants
The relation of combinants to various statistics characterizing the fluctuation pattern of multihadron final states is discussed. Scaling laws are derived for count probabilities and combinants in the presence of homogeneous and clustered monofractal density fluctuations. It is argued that both types of scaling rules are well suited to signal Quark-Gluon Plasma formation in a second-order QCD p...
متن کاملSemiflexible polymer solutions. I. Phase behavior and single-chain statistics
We study the thermodynamics and single-chain statistics of wormlike polymer solutions with Maier–Saupe-type interactions using self-consistent-field ~SCF! theory. The SCF equations are derived using a systematic field-theoretical approach which yields the SCF equations as the lowest order approximation, but permits fluctuation corrections to be incorporated. We solve the SCF equations using the...
متن کاملCorrelation Length and Negative Phase Velocity in Isotropic Dielectric–magnetic Materials
A composite material comprising randomly distributed spherical particles of two different isotropic dielectric–magnetic materials is homogenized using the second–order strong– property–fluctuation theory in the long–wavelength approximation. Whereas neither of the two constituent materials by itself supports planewave propagation with negative phase velocity (NPV), the homogenized composite mat...
متن کاملFlow Pattern and Oil Holdup Prediction in Vertical Oil–Water Two–Phase Flow Using Pressure Fluctuation Signal
In this work, the feasibility of flow pattern and oil hold up the prediction for vertical upward oil–water two–phase flow using pressure fluctuation signals was experimentally investigated. Water and diesel fuel were selected as immiscible liquids. Oil hold up was measured by Quick Closing Valve (QCV) technique, and five flow patterns were identified using high-speed photo...
متن کامل