| slovo | definícia |
cosine
(mass) | cosine
- kosínus |
cosine
(encz) | cosine,kosinus n: Zdeněk Brož |
Cosine
(gcide) | Cosine \Co"sine\ (k?"s?n), n. [For co. sinus, an abbrev. of L.
complementi sinus.] (Trig.)
The sine of the complement of an arc or angle. See Illust. of
Functions.
[1913 Webster] Cosmetic |
cosine
(wn) | cosine
n 1: ratio of the adjacent side to the hypotenuse of a right-
angled triangle [syn: cosine, cos] |
cosine
(foldoc) | COSINE
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cosine
(vera) | COSINE
Cooperation for OSI Networking in Europe (org.)
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| | podobné slovo | definícia |
cosine
(mass) | cosine
- kosínus |
cosine
(encz) | cosine,kosinus n: Zdeněk Brož |
cosiness
(encz) | cosiness,pohodlí Zdeněk Brožcosiness,útulnost n: Zdeněk Brož |
sarcosine
(encz) | sarcosine, n: |
chalcosine
(gcide) | Chalcocite \Chal"co*cite\, n. [Gr. chalko`s brass.] (Min.)
Native copper sulphide, called also copper glance, and
vitreous copper; a mineral of a black color and metallic
luster. [Formerly written chalcosine.]
[1913 Webster] Chalcographer |
Cosine galvanometer
(gcide) | Galvanometer \Gal`va*nom"e*ter\, n. [Galvanic + -meter: cf. F.
galvanom[`e]tre.] (Elec.)
An instrument or apparatus for measuring the intensity of an
electric current, usually by the deflection of a magnetic
needle.
[1913 Webster]
Differential galvanometer. See under Differental, a.
Sine galvanometer, Cosine galvanometer, {Tangent
galvanometer} (Elec.), a galvanometer in which the sine,
cosine, or tangent respectively, of the angle through
which the needle is deflected, is proportional to the
strength of the current passed through the instrument.
[1913 Webster] |
Glycosine
(gcide) | Glycosine \Gly"co*sine\, n. (Chem.)
An organic base, C6H6N4, produced artificially as a white,
crystalline powder, by the action of ammonia on glyoxal.
[1913 Webster] |
hyperbolic cosines
(gcide) | Hyperbolic \Hy`per*bol"ic\, Hyperbolical \Hy`per*bol"ic*al\, a.
[L. hyperbolicus, Gr. ?: cf. F. hyperbolique.]
1. (Math.) Belonging to the hyperbola; having the nature of
the hyperbola.
[1913 Webster]
2. (Rhet.) Relating to, containing, or of the nature of,
hyperbole; exaggerating or diminishing beyond the fact;
exceeding the truth; as, an hyperbolical expression. "This
hyperbolical epitaph." --Fuller.
[1913 Webster]
Hyperbolic functions (Math.), certain functions which have
relations to the hyperbola corresponding to those which
sines, cosines, tangents, etc., have to the circle; and
hence, called hyperbolic sines, hyperbolic cosines,
etc.
Hyperbolic logarithm. See Logarithm.
Hyperbolic spiral (Math.), a spiral curve, the law of which
is, that the distance from the pole to the generating
point varies inversely as the angle swept over by the
radius vector.
[1913 Webster] |
arc cosine
(wn) | arc cosine
n 1: the inverse function of the cosine; the angle that has a
cosine equal to a given number [syn: arc cosine,
arccosine, arccos, inverse cosine] |
arccosine
(wn) | arccosine
n 1: the inverse function of the cosine; the angle that has a
cosine equal to a given number [syn: arc cosine,
arccosine, arccos, inverse cosine] |
cosine
(wn) | cosine
n 1: ratio of the adjacent side to the hypotenuse of a right-
angled triangle [syn: cosine, cos] |
cosiness
(wn) | cosiness
n 1: a state of warm snug comfort [syn: coziness, cosiness,
snugness] |
inverse cosine
(wn) | inverse cosine
n 1: the inverse function of the cosine; the angle that has a
cosine equal to a given number [syn: arc cosine,
arccosine, arccos, inverse cosine] |
sarcosine
(wn) | sarcosine
n 1: a sweetish crystalline amino acid |
cosine
(foldoc) | COSINE
Cooperation for Open Systems Interconnection Networking in
Europe. A EUREKA project.
|
discrete cosine transform
(foldoc) | discrete cosine transform
(DCT) A technique for expressing a waveform as a
weighted sum of cosines.
The DCT is central to many kinds of signal processing,
especially video compression.
Given data A(i), where i is an integer in the range 0 to N-1,
the forward DCT (which would be used e.g. by an encoder) is:
B(k) = sum A(i) cos((pi k/N) (2 i + 1)/2)
i=0 to N-1
B(k) is defined for all values of the frequency-space variable
k, but we only care about integer k in the range 0 to N-1.
The inverse DCT (which would be used e.g. by a decoder) is:
AA(i)= sum B(k) (2-delta(k-0)) cos((pi k/N)(2 i + 1)/2)
k=0 to N-1
where delta(k) is the Kronecker delta.
The main difference between this and a {discrete Fourier
transform} (DFT) is that the DFT traditionally assumes that
the data A(i) is periodically continued with a period of N,
whereas the DCT assumes that the data is continued with its
mirror image, then periodically continued with a period of 2N.
Mathematically, this transform pair is exact, i.e. AA(i) ==
A(i), resulting in lossless coding; only when some of the
coefficients are approximated does compression occur.
There exist fast DCT algorithms in analogy to the {Fast
Fourier Transform}.
(1997-03-10)
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cosine
(vera) | COSINE
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