An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 14 Search : random
independent random variables
  ورتنده‌های ِ کاتوره‌ی ِ ناوابسته   
vatandehâ-ye kâture-ye nâvâbasté

Fr.: variables aléatoires indépendantes   

Statistics: Two random variables X and Y if and only if the value of X has no influence on the value of Y and vice versa.

dependent; → random; → variable.

random
  کاتوره   
kâturé (#)

Fr.: aléatoire, au hasard   

1) General: Made or occurring without a definite pattern, plan, or system; haphazard arrangement as if due to pure chance.
2) Statistics: Of or characterizing a process of selection in which each item of a population has an equal probability of being chosen.
See also:
random access memory, → random error, → random experiments, → random noise, → random sample, → random structure, → random thermal motion, → random variable , → independent random variables, → random walk, → randomization, → randomize, → randomness.

M.E. raundon, random "impetuosity, speed," from O.Fr. randon "rush, disorder, impetuosity," from randir "to run fast."

Kâturé originally "dazzled, confused," variants katré "disorderly, ragged, tattered, babble, meaningless or incoherent speech," katreyi "disorderly, at random;" maybe from kat- "to fall;" → case.

random access memory (RAM)
  بَرم با دسترسی ِ کاتوره   
barm bâ dastrasi-ye kâtruré

Fr.: mémoire à accès aléatoire   

In computer technique, a configuration of memory cells that hold data for processing by a central processing unit (CPU). The term random derives from the fact that the CPU can retrieve data from any individual location, or address, within RAM.

random; → access; → memory.

random error
  ایرنگ ِ کاتوره   
irang-e kâturé

Fr.: erreur fortuite   

The fluctuating part of the overall error that varies from measurement to measurement. Normally, the random error is defined as the deviation of the total error from its mean value; opposite of → systematic error.

random; → error.

random experiments
  آزمایش‌های ِ کاتوره   
âzmâyešhâ-ye kâturé (#)

Fr.: expériences aléatoires   

Statistics: Experiments in which results will not be essentially the same even though conditions may be nearly identical.

random; → experiment.

random noise
  نوفه‌ی ِ کاتوره   
nufe-ye kâture

Fr.: bruit aléatoire   

Unpredictable noise comprising large numbers of frequent, transient impulses occurring at statistically random time intervals. Thermal noise is a form of random noise.

random; → noise.

random sample
  نمونان ِ کاتوره   
nemunân-e kâturé

Fr.: échantillon aléatoire   

A sample selected at random from a population.

random; → sample.

random structure
  ساختار ِ کاتوره   
sâxtâr-e kâturé

Fr.: structure aléatoire   

Crystalline arrangement in which equivalent positions are not necessarily occupied by atoms of a single kind.

random; → structure.

random thermal motion
  جنبش ِ گرمایی ِ کاتوره   
jonbeš-e garmâyi-ye kâturé

Fr.: mouvement thermique aléatoire   

The agitated motion of molecular, atomic, or → subatomic particles in all possible directions at any temperature, except at → absolute zero, where → thermal motion would cease.

random; → thermal; → motion.

random variable
  ورتنده‌ی ِ کاتوره   
vartande-ye kâturé

Fr.: variable aléatoire   

A quantity that takes different real values as a result of the → outcomes of a → random event or experiment involving specified probabilities.

random; → variable.

random walk
  پویش ِ کاتوره   
puyeš-e kâturé

Fr.: marche aléatoire, ~ au hasard   

The trajectory consisting of a series of successive moves in which the direction and size of each move is randomly determined.

random; → walk.

randomization
  کاتورش   
kâtureš (#)

Fr.: aléation   

Arrangement of data in such a way as to simulate chance occurrence.

Verbal noun of → randomize.

randomize
  کاتوریدن   
kâturidan (#)

Fr.: répartir au hasard   

To arrange or select in a random manner in order to reduce bias and interference caused by irrelevant variables.

Verbal form of → random.

randomness
  کاتورگی   
kâturegi (#)

Fr.: hasard   

The property of being random.

State, condition noun of → random.