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Density and Redundancy of the Noncoherent Weyl-Heisenberg Superframes
Density and Redundancy Noncoherent Weyl-Heisenberg Superframes
2015/9/29
Density and Redundancy of the Noncoherent Weyl-Heisenberg Superframes.
Density,Overcompleteness,and Localization of Frames.I.Theory
Density excess frames Gabor systems modulation spaces overcompleteness Riesz bases wavelets Weyl–Heisenberg systems
2015/9/29
Frames have applications in numerous fields of mathematics and engineering.The fundamental property of frames which makes them so useful is their overcompleteness.In most applications, it is this over...
Density, Overcompleteness,and Localization of Frames.II.Gabor Systems
Density excess frames Gabor systems modulation spaces overcompleteness Riesz bases wavelets Weyl–Heisenberg systems
2015/9/29
This work develops a quantitative framework for describing the overcompleteness of a large class of frames. A previous article introduced notions of localization and approximation between two frames F...
The Existence of Pair Potential Corresponding to Specified Density and Pair Correlation
Gibbs Field Gibbs Measure Cluster Functions Pair Potential Corrlation Functions Ursell Functions
2015/9/28
Given a potential of pair interaction and a value of activity, one can consider the Gibbs distribution in a finite domain Λ ⊂ Z d . It is well known that for small values of activity there...
Electon density profiles of the topside ionosphere
ionograms electron density profiles satellite orbits altitude
2015/9/25
The existing uncertainties about the electron density profiles in the topside ionosphere, i.e., in the height region from h m F 2 to ~ 2000 km, require the search for new data sources. The ISIS and Al...
Relations between electron contentand peak density: regular and extreme behaviour
contentand electronic
2015/9/14
Electron content statistics offers important information for planning and operation of various application
systems that make use of the transionospheric propagation of radio signals. Electron content...
An improved bottomside for the ionospheric electron density model NeQuick
ionosphere electron density models profilers
2015/9/10
The ionospheric electron density model NeQuick is a 玴rofiler?which uses the peaks of the E-layer, the F1-layer
and the F2-layer as anchor points. In the version prepared for and submitted to the Inte...
The TID model for modulation of large scale electron density models
ionosphere electron density models Travelling Ionospheric Disturbances TID model
2015/9/10
Various modern applications of empirical electron density models need realistic structures of the electron density
distribution with smaller scales than the model background. Travelling Ionospheric D...
Ionospheric topside models compared with experimental electron density profiles
topside ionosphere electron density models topside soundings
2015/9/10
Recently an increasing number of topside electron density profiles has been made available to the scientific community
on the Internet. These data are important for ionospheric modeling purposes, sin...
Comparison of analytical functions used to describe topside electron density profiles with satellite data
topside ionosphere ionospheric modeling ionospheric layer formulation top side soundings
2015/9/10
Electron density models of the ionosphere use different analytical formulations for the electron density vertical
profile in the topside. The present paper compares some single-layer topside analytic...
Validation of a method for ionospheric electron density reconstruction by means of vertical incidence data during quiet and storm periods
electron density model vertical incidence ionograms ionospheric data ingestion
2015/9/10
A preliminary validation of the technique developed using the NeQuick ionospheric model and the 玡ffective ionization
parameter?Az, based on vertical total electron content data ingestion, was carried...
A model assisted ionospheric electron density reconstruction method based on vertical TEC data ingestion
ionospheric data ingestion electrondensity model total electron content
2015/9/10
A technique to reconstruct the electron density of the ionosphere starting from total electron content values has
been developed using the NeQuick ionospheric electron density model driven by its eff...
Imaging of fast moving electron-density structures in the polar cap
polar cap ionosphere data analysis inverse theory ionospheric storms
2015/9/2
The imaging of fast-moving electron-density structures in the polar cap presents a unique set of challenges that
are not encountered in other ionospheric imaging problems. GPS observations of total e...
Tree size frequency distributions, plant density, age and community disturbance
Allometry community ecology plant size stem diameter
2015/8/27
We show that explicit mathematical and biological relationships exist among the scaling exponents and the allometric constants (a and b, respectively) of log–log linear tree-community size frequency d...
Asymptotic Equivalence of Spectral Density Estimation and Gaussian White Noise
Stationary Gaussian process spectral density Sobolev classes Le Cam distance asymptotic equivalence Whittle likelihood log-periodogram regression nonparametric Gaussian scale model signal in Gaussian white noise
2015/8/25
We consider the statistical experiment given by a sample y(1), . . . , y(n) of a stationary Gaussian process with an unknown smooth spectral density f. Asymptotic equivalence, in the sense of Le Cam’s...