hesâb-e dorin, ~ dodoi (#)
Fr.: arithmétique binaire
A system of calculation in which the only numerals used are 0 and 1. All the real numbers are represented in terms of powers of 2.
Fr.: astéroïde binaire
A member of a population of double objects in the main → Asteroid Belt or the → Kuiper Belt which are gravitationally bound together. So far about 200 such binary systems have been identified, while their number is increasing. 243 Ida was the first binary asteroid to be discovered during the Galileo spacecraft flyby in 1993. Other examples are → Antiope and Kalliope in the main belt and QG298 in the Kuiper Belt. The importance of these objects resides in the fact that systems with well measured orbital parameters allow the total mass to be estimated. If the sizes of the components are known then their densities can be accurately calculated. Density is an important parameter since it yields information about composition and internal structure.
binary black hole
siyah câl-e dorin
Fr.: trou noir binaire
binary digit (bit)
raqam-e dorin, ~ dodoi, bit
Fr.: chiffre binaire
Either of the digits 0 or 1, used in the → binary number system.
Fr.: galaxie binaire
A pair of galaxies in orbit around each other.
→ binary; → galaxy.
binary number system
râžmân-e adadhâ-ye dirini
Fr.: système des nombres binaires
A → numeral system that has 2 as its base and uses only two digits, 0 and 1. The positional value of each digit in a binary number is twice the place value of the digit of its right side. Each binary digit is known as a bit. The decimal numbers from 0 to 10 are thus in binary 0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, and 1010. And, for example, the binary number 111012 represents the decimal number (1 × 24) + (1 × 23) + (1 × 22) + (0 × 21) + (1 × 20), or 29. In electronics, binary numbers are the flow of information in the form of zeros and ones used by computers. Computers use it to manipulate and store all of their data including numbers, words, videos, graphics, and music.
Fr.: opération binaire
A mathematical operation that combines two numbers, quantities, sets, etc.,
to give a third. For example, multiplication of two numbers is a binary operation.
pulsâr-e dorin, tapâr-e ~
Fr.: pulsar binaire
A pulsar in a → binary system, the companion of which often being a → neutron star or a → white dwarf. The only known binary system with two pulsars components is the → double pulsar. As of 2010 about 70 binary pulsars have been identified. They are ideal laboratories for testing and studying the effects predicted by → general relativity, such as → spin precession, → Shapiro time delay, and → gravitational waves. The prototype, called PSR 1913+16, was discovered in 1974 by Russell A. Hulse and Joseph H. Taylor, Jr., who received the Nobel Prize for Physics in 1993. → Hulse-Taylor pulsar.
Fr.: étoile binaire
→ binary; → star.
binary supermassive black hole
siyah-câl-e abar-porjerm-e dorin
Fr.: trou noir supermassif double
A → dual supermassive black hole whose components are separated by a few parsecs.
Fr.: système binaire
Two astronomical objects revolving around their common center of mass.
→ binary; → system.
Fr.: arbre binaire
To tie, to fasten, to cause ti stick together.
O.E. bindan "to tie up with bonds," PIE base *bhendh- "to bind;" cf. Av./O.Pers. band- "to bind, fetter," banda- "band, tie," Skt. bandh- "to bind, tie, fasten," bandhah "a tying, bandage."
Bandidan "to bind, confine" [Mo'in, Dehxodâ], from band "band, tie" + -idan infinitive suffix; cognate with E. bind, as explained above.
kâruž-e bandeš, ~ hamgiri
Fr.: énergie de liaison
1) Of a gravitational system, the difference
in energies between the hypothetical state where all bodies of
the system are infinitely separated from each other and the actual bound state.
Combining a few adjacent CCD pixels in bins, during readout; the method used to assemble the bins and transfer the charge by means of an electronic clock. Binning improves signal-to-noise ratio at the expense of spatial resolution.
Binning, from → bin.
Bâvineš, from bâvin, → bin.
docašmi (#), durbin-e ~ (#)
A small optical instrument with two tubes that is used to magnify the view of distant or astronomical objects. → prism binoculars.
From Fr. binoculaire, from binocle, from L. bini "double" (L. bis, bi- "twice," Av. biš "twice") + ocularis "of the eye," from oculus "eye" (compare with Av. axš-, aš- "eye," Skt. akshi- "eye," Gk. ops "eye," opsis "sight, appearance," from PIE okw- "to see;" also O.E. ege, eage, from P.Gmc. *augon, Goth. augo, Lith. akis, Armenian aku).
Fr.: 1) binôme; 2) binomial
1a) An algebraic expression containing 2 terms, as x + y and
2x2 - 3x. In other words, a → polynomial
with 2 terms.
Fr.: coefficient binomial
The factor multiplying the variable in a term of a → binomial expansion. For example, in (x + y)4 = x4 + 4x3y + 6x2y2 + 4xy3 + y4 the binomial coefficients are 1, 4, 6, 4, and 1. In general, the r-th binomial coefficient in the expression (x + y)n is: (n,r) = n!/[r!(n - r)!].
Fr.: binôme différentiel
An expression of the form xm(a + bxn)pdx, where m, n, p, a, and b are constants.
Fr.: distribution binomiale
A probability distribution for independent events for which there are only two possible outcomes i.e., success and failure. The probability of x successes in n trials is: P(x) = [n!/x!(n - x)!] px.qn - x, where p is the probability of success and q = 1 - p the probability of failure on each trial. These probabilities are given in terms of the → binomial theorem expansion of (p + q)n.