Search results for "Second order moments"

showing 5 items of 5 documents

Stationary Point Processes

2008

CombinatoricsSaddle pointNearest neighbour distributionStatistical physicsSecond order momentsStationary pointMathematics
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Elementary hypergeometric functions, Heun functions, and moments of MKZ operators

2019

We consider some hypergeometric functions and prove that they are elementary functions. Consequently, the second order moments of Meyer-Konig and Zeller type operators are elementary functions. The higher order moments of these operators are expressed in terms of elementary functions and polylogarithms. Other applications are concerned with the expansion of certain Heun functions in series or finite sums of elementary hypergeometric functions.

Pure mathematicsAlgebra and Number TheorySeries (mathematics)Applied Mathematics010102 general mathematicsMathematics::Classical Analysis and ODEsNumerical Analysis (math.NA)Type (model theory)33C05 33C90 33E30 41A3601 natural sciencesSecond order moments010101 applied mathematicsComputational MathematicsMathematics - Classical Analysis and ODEsClassical Analysis and ODEs (math.CA)FOS: MathematicsElementary functionHigher order momentsGeometry and TopologyMathematics - Numerical Analysis0101 mathematicsHypergeometric functionAnalysisMathematics
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Stochastic dynamics and mean field approach in a system of three interacting species

2008

The spatio-temporal dynamics of three interacting species, two preys and one predator, in the presence of two different kinds of noise sources is studied. To describe the spatial distributions of the species we use a model based on Lotka-Volterra equations. A correlated dichotomous noise acts on \beta, the interaction parameter between the two preys, and a multiplicative white noise affects directly the dynamics of each one of the three species. We study the time behaviour of the three species in single site for different values of the multiplicative noise intensity, finding noise-induced oscillations of the three species densities with an anticorrelated behaviour of the two preys. Afterwar…

Settore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciQC1-99987.23.ccstatistical mechanicFOS: Physical sciencesGeneral Physics and AstronomyMultiplicative noiseStochastic dynamics02.50.-r05.45.raSingle siteLattice (order)population dynamicsnoise-induced effectsQuantitative Biology::Populations and EvolutionStatistical physicsCondensed Matter - Statistical MechanicsMathematics05.40.-aStatistical Mechanics (cond-mat.stat-mech)PhysicsSecond order momentspopulation dynamicMean field theorystatistical mechanicsCoupled map latticeMoment equationsOpen Physics
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The alhambra photometric system

2010

Aparicio Villegas, Teresa et al.

StandardsCosmology and Nongalactic Astrophysics (astro-ph.CO)media_common.quotation_subjectFOS: Physical sciencesPhotometric systemAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysicsfundamental parameters [Stars]Instrumentation: photometersPhotometry (optics)Galaxies: distances and redshiftsdistances and redshifts [Galaxies]Astrophysics::Solar and Stellar Astrophysicsobservations [Cosmology]Instrumentation and Methods for Astrophysics (astro-ph.IM)Stars: fundamental parametersAstrophysics::Galaxy Astrophysicsmedia_commonPhysicsCosmology: observationsphotometric [Techniques]Astrophysics::Instrumentation and Methods for AstrophysicsAstronomy and AstrophysicsSecond order momentsWavelengthStarsphotometers [Instrumentation]Space and Planetary ScienceSkyAstrophysics::Earth and Planetary AstrophysicsAstrophysics - Instrumentation and Methods for AstrophysicsTechniques: photometricAstrophysics - Cosmology and Nongalactic Astrophysics
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Combined dynamic response of primary and multiply connected cascaded secondary subsystems

1991

A method is proposed for the deterministic and stochastic non-stationary analysis of linear composite systems with cascaded secondary subsystems subjected to a seismic input. This method makes it possible to evaluate, by means of a unitary formulation, the deterministic and non-stationary stochastic response of both classically and non-classically damped subsystems and of secondary subsystems multiply supported on the primary one, as well as the ground. The proposed procedure is very efficient from a computational point of view, because of the Kronecker algebra systematically employed. Indeed, by using this algebra, it is possible to obtain in a very compact and elegant form the eigenproper…

Stochastic processFunction (mathematics)Geotechnical Engineering and Engineering GeologyTopologyUnitary stateSecond order momentssymbols.namesakeSimple (abstract algebra)Ordinary differential equationKronecker deltaEarth and Planetary Sciences (miscellaneous)symbolsPoint (geometry)AlgorithmMathematicsEarthquake Engineering & Structural Dynamics
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