Search results for "Conditions initiales"

showing 2 items of 2 documents

Behaviour of common estimators in dynamic error-components models with autocorrelated disturbances

1997

The purpose of this paper is to make a presentation of the properties of a set of estimators comprising the within, between, OLS and GLS estimators in the study of dynamic error - components models with autocorrelated disturbances. We underline in this study the importance of the statistical distribution governing the initial values for the process and the structure of xit variable for the limiting values of the estimators when the temporal dimension is fixed but the individual dimension N grows indefinitly.

Conditions initialesEconomic theoryEconomicsModèles dynamiques à erreurs composéesEstimation convergenteStatisticsLimites en probabilité[ SHS.ECO ] Humanities and Social Sciences/Economies and financesAutocorrélationOperations research[SHS.ECO]Humanities and Social Sciences/Economics and FinanceProriétés asymptotiques[SHS.ECO] Humanities and Social Sciences/Economics and Finance
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Attraction d'ondes pour des systèmes à résonance d'ondes contra-propagatives

2011

Wave attraction in counter-propagating waves systems is a general phenomenon that was first established in Physics in the context of the attraction of the polarization between two counter-propagating waves in optical fibers. This phenomenon has been observed experimentally, and its properties were studied through numerical simulations. The models are Hamiltonian hyperbolic systems of partial differential equations, with time-dependent boundary conditions on a finite interval. The underlying mechanism can be traced back to the existence of singular tori in the corresponding stationary equations. In this work we analyze in detail the simplest example in this family of models. We show that mos…

RésonanceLong time behaviour[ MATH.MATH-GM ] Mathematics [math]/General Mathematics [math.GM]Comportement asymptotiqueInitial boundary value problem[MATH.MATH-GM] Mathematics [math]/General Mathematics [math.GM]Hyperbolic PDEResonanceCounter-propagating waves[MATH.MATH-GM]Mathematics [math]/General Mathematics [math.GM]Wave attractionEDP hyperbolique avec conditions initiales et aux bordsOndes contra-propagativesAttraction d'ondes
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