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Number of Results: 10 Search : perturbation

linear perturbation theory negare-ye partureš-e xatti Fr.: théorie de perturbation linéaire Assumption that the variations in the plasma parameters, due to the presence of waves, are small (to the first order) as compared to the undisturbed parameters. This makes it possible to linearize equations by dropping out second order (and higher) nonlinear terms. → |

method of small perturbations raveš-e parturešhâ-ye kucak Fr.: méthode des petites perturbations The linearization of the appropriate equations governing a system by
the assumption of a steady state, with departures from that steady
state limited to small perturbations. Also called → |

perturbation partureš Fr.: perturbation 1) Any departure introduced into a steady state of a system.
The magnitude is often assumed to be small so
that the resulting terms in the dependent variables may be neglected.
The term "perturbation" is therefore sometimes used as synonymous with "small perturbation." Verbal noun of → |

perturbation equation hamugeš-e partureš Fr.: équation de perturbation Any equation governing the behavior of a → → |

perturbation method raveš-e partureš Fr.: méthode de perturbation Approximate method of solving a difficult problem if the equations to be solved depart only slightly from those of a problem already solved. → |

primordial curvature perturbation partureš-e xamidegi-ye bonâqâzin Fr.: perturbation de courbure primordiale In cosmological models, the phenomenon that is supposed to seed the
→ → |

scalar perturbation partureš-e marpeli Fr.: perturbation scalaire The energy density fluctuations in the → → |

secular perturbation partureš-e diryâz Fr.: perturbation séculaire A variation of planetary orbital elements which is always in the same direction as time increases. → |

tensor perturbation partureš-e tânsori Fr.: perturbation tensorielle The perturbation in the → → |

vector perturbation partureš-e bordâri Fr.: perturbation vectorielle The perturbation in the → → |