# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 43 Search : linear
 linear regression   وایازی ِ خطی   vâyâzi-ye xattiFr.: regression linéaire   In statistics, a regression method that establishes a linear relationship between two random variables.→ linear; → regression. linear size   اندازه‌ی ِ خطی   andâze-ye xattiFr.: taille linéaire   The real, physical size, as opposed to angular size.→ linear; → size. linear system   راژمان ِ خطی   râžmân-e xattiFr.: système linéaire   Physics: A → dynamical system whose evolution is a linear process. If a change in any variable at some initial time produces a change in the same or some other variable at some later time, twice as large a change at the same initial time will produce twice as large a change at the same later time.→ linear; → system. linear velocity   تندای ِ خطی   tondâ-ye xattiFr.: vitesse linéaire   The rate of change of the position of an object that is traveling along a straight path. In other words, the velocity of an object when its moving direction is not changing. For a given → angular velocity (ω), the linear velocity v of the particle is directly proportional to the distance of the particle from the center of the circular path: v = ω ×r.→ linear; → velocity. linearity   خطیگی   xattigiFr.: linéarité   The property, condition, or state of being linear. Math.: A relationship between two variables so that when plotted on a graph they yield a straight line.→ linear; → -ity. linearization   خطش، خطانش   xatteš, xattânešFr.: linéarisation   A process of reduction to linear form by appropriate change of variables or by approximation.Verbal noun of → linearize. linearize   خطیدن، خطانیدن   xattidan, xattânidanFr.: linéariser   To make linear; give linear form to.→ linear + → -ize. linearized differential equation   هموگش ِ دگرسانه‌ای ِ خطی   hamugeš-e degarsâneyi-ye xattiFr.: équation différentielle linéarisée   A differential equation that has been derived from an original nonlinear equation.Linearized, p.p. of → linearize; → differential; → equation. linearly   خطانه   xattânéFr.: linéairement   In a manner characterized by first-degree algebraic terms.Adverb of → linear. linearly dependent   خطانه وابسته   xattâné vâbastéFr.: linéairement dépendant   A set of objects x1, x2, ..., xn (→ vectors, → matrices, → polynomials, etc.) on a given set if there is a linear combination of them: a1x1 + a2x2 + ... + anxn, which is zero, but at least one of the coefficients is non-zero. For example the binomials (2x + y) and (6x + 3y) are linearly dependent, since 3(2x + y) - (6x + 3y) = 0.→ linearly; → dependent. linearly independent   خطانه ناوابسته   xattâné nâvâbastéFr.: linéairement indépendant   1) A set of objects x1, x2, ..., xn (→ vectors, → matrices, → polynomials, etc.) if it si not → linearly dependent. 2) Of two particular solutions (y1, y2) of a → homogeneous linear differential equation of the second order (y'' + a1 y' + a2y = 0) on an interval [a, b], if their ratio in this interval is not a constant: y1/y2≠ constant.→ linearly; → independent. linearly polarized light   نور ِ قطبیده‌ی ِ خطی   nur-e qotbide-ye xattiFr.: lumière polarisée linéairement   Light exhibiting → linear polarization.→ linearly; → polarized; → light. nonhomogeneous linear differential equation   هموگش ِ دگرسانه‌ای ِ خطی ناهمگن   hamugeš-e degarsâne-yi-ye xatti nâhamgenFr.: équation différentielle linéaire non homogène   A → linear differential equation if Q(x)≠ 0 on interval I.→ nonhomogeneous; → linear; → differential; → equation. nonlinear   ناخطی   nâxatti (#)Fr.: non-linéaire   Not a linear function of the relevant variables. Containing a variable with an exponent other than one; opposite of → linear.→ non-; → linear. nonlinear device   دستگاه ِ ناخطی   dastgâh-e nâxattiFr.: dispositif non-linéaire   An electronic device whose output is not directly proportional to its input. For example, in a → diode the current is a nonlinear function of the voltage; its voltage-current characteristics do not obey → Ohm's law.→ nonlinear; → device. nonlinear dynamics   توانیک ِ ناخطی   tavânik-e nâxattiFr.: dynamique non-linéaire   Same as → chaos.→ nonlinear; → dynamics. nonlinear instability   ناپایداری ِ ناخطی   nâpâydâri-ye nâxattiFr.: instabilité non-linéaire   The instability of a physical or mathematical system that arises from the nonlinear nature of relevant variables and their interactions within the system.→ nonlinear; → instability. nonlinear system   راژمان ِ ناخطی   râžmân-e nâxattiFr.: système non-linéaire   A system in which small changes can result in large effects, and large changes in small effects.→ nonlinear; → system. nonlinearity   ناخطیگی   nâxattigiFr.: non-linéarité   The property, condition, or state of being → nonlinear.→ non-; → linearity. quasi-linear theory   نگره‌ی ِ چونان-خطی   negare-ye cunân-xattiFr.: théorie quasi-linéaire   In plasma physics, the theory that considers the interactions between waves and particles are of first order only. It ignores all terms of second order in the fluctuating quantities.→ quasi-; → linear; → theory.

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