| slovo | definícia |
difference
(mass) | difference
- odlišnosť, rozdiel |
difference
(encz) | difference,diferenční adj: [mat.] Tolda |
difference
(encz) | difference,neshoda n: Zdeněk Brož |
difference
(encz) | difference,odlišnost n: Zdeněk Brož |
difference
(encz) | difference,odlišovat v: Zdeněk Brož |
difference
(encz) | difference,rozdíl n: [mat.] |
difference
(encz) | difference,schodek n: RNDr. Pavel Piskač |
Difference
(gcide) | Difference \Dif"fer*ence\, v. t. [imp. & p. p. Differenced; p.
pr. & vb. n. Differencing.]
To cause to differ; to make different; to mark as different;
to distinguish.
[1913 Webster]
Thou mayest difference gods from men. --Chapman.
[1913 Webster]
Kings, in receiving justice and undergoing trial, are
not differenced from the meanest subject. --Milton.
[1913 Webster]
So completely differenced by their separate and
individual characters that we at once acknowledge them
as distinct persons. --Sir W.
Scott.
[1913 Webster] |
Difference
(gcide) | Difference \Dif"fer*ence\, n. [F. diff['e]rence, L.
differentia.]
1. The act of differing; the state or measure of being
different or unlike; distinction; dissimilarity;
unlikeness; variation; as, a difference of quality in
paper; a difference in degrees of heat, or of light; what
is the difference between the innocent and the guilty?
[1913 Webster]
Differencies of administration, but the same Lord.
--1 Cor. xii.
5.
[1913 Webster]
2. Disagreement in opinion; dissension; controversy; quarrel;
hence, cause of dissension; matter in controversy.
[1913 Webster]
What was the difference? It was a contention in
public. --Shak.
[1913 Webster]
Away therefore went I with the constable, leaving
the old warden and the young constable to compose
their difference as they could. --T. Ellwood.
[1913 Webster]
3. That by which one thing differs from another; that which
distinguishes or causes to differ; mark of distinction;
characteristic quality; specific attribute.
[1913 Webster]
The marks and differences of sovereignty. --Davies.
[1913 Webster]
4. Choice; preference. [Obs.]
[1913 Webster]
That now he chooseth with vile difference
To be a beast, and lack intelligence. --Spenser.
[1913 Webster]
5. (Her.) An addition to a coat of arms to distinguish the
bearings of two persons, which would otherwise be the
same. See Augmentation, and Marks of cadency, under
Cadency.
[1913 Webster]
6. (Logic) The quality or attribute which is added to those
of the genus to constitute a species; a differentia.
[1913 Webster]
7. (Math.) The quantity by which one quantity differs from
another, or the remainder left after subtracting the one
from the other.
[1913 Webster]
Ascensional difference. See under Ascensional.
Syn: Distinction; dissimilarity; dissimilitude; variation;
diversity; variety; contrariety; disagreement; variance;
contest; contention; dispute; controversy; debate;
quarrel; wrangle; strife.
[1913 Webster] |
difference
(wn) | difference
n 1: the quality of being unlike or dissimilar; "there are many
differences between jazz and rock" [ant: sameness]
2: a variation that deviates from the standard or norm; "the
deviation from the mean" [syn: deviation, divergence,
departure, difference]
3: a disagreement or argument about something important; "he had
a dispute with his wife"; "there were irreconcilable
differences"; "the familiar conflict between Republicans and
Democrats" [syn: dispute, difference, {difference of
opinion}, conflict]
4: a significant change; "the difference in her is amazing";
"his support made a real difference"
5: the number that remains after subtraction; the number that
when added to the subtrahend gives the minuend [syn:
remainder, difference] |
DIFFERENCE
(bouvier) | DIFFERENCE. A dispute, contest, disagreement, quarrel.
|
| | podobné slovo | definícia |
indifference
(mass) | indifference
- ľahostajnosť |
accommodate differences
(encz) | accommodate differences,urovnat spory v: |
difference engine
(encz) | difference engine,diferenční stroj web |
difference equation
(encz) | difference equation,diferenční rovnice n: [mat.] |
difference limen
(encz) | difference limen, n: |
difference of opinion
(encz) | difference of opinion, n: |
difference threshold
(encz) | difference threshold, n: |
differences
(encz) | differences,rozdíly n: pl. Zdeněk Brož |
indifference
(encz) | indifference,lhostejnost n: Zdeněk Brož |
indifference curve
(encz) | indifference curve,indiferenční křivka [eko.] RNDr. Pavel Piskač |
indifference map
(encz) | indifference map,indiferenční mapa [eko.] RNDr. Pavel Piskač |
it makes no difference
(encz) | it makes no difference, |
just-noticeable difference
(encz) | just-noticeable difference, n: |
make a difference
(encz) | make a difference,mít vliv v: [fráz.] na něco Vít Zajacmake a difference,mít význam v: [fráz.] v nějaké věci Vít Zajacmake a difference,prosadit se v: [fráz.] Vít Zajacmake a difference,rozlišovat v: Zdeněk Brožmake a difference,záleží na tom v: [fráz.] Ivan Masár |
make no difference
(encz) | make no difference,nemít význam [fráz.] neovlivnit výsledek [něčeho] Vít
Zajac |
makes no difference
(encz) | makes no difference, |
potential difference
(encz) | potential difference, n: |
rank-difference correlation
(encz) | rank-difference correlation, n: |
rank-difference correlation coefficient
(encz) | rank-difference correlation coefficient, n: |
rawlsian difference principle
(encz) | Rawlsian Difference Principle,Rawlsianův princip rozdílu [eko.] RNDr.
Pavel Piskač |
split the difference
(encz) | split the difference, |
what makes a difference
(encz) | what makes a difference,na čem záleží [fráz.] Ivan Masár |
world of difference
(encz) | world of difference,obrovský rozdíl [fráz.] např. "There's a world of
difference between what we say and what we do." Pino |
linear finite-difference
(czen) | Linear Finite-Difference,LFD[zkr.] [voj.] Zdeněk Brož a automatický
překlad |
Ascensional difference
(gcide) | Ascensional \As*cen"sion*al\, a.
Relating to ascension; connected with ascent; ascensive;
tending upward; as, the ascensional power of a balloon.
[1913 Webster]
Ascensional difference (Astron.), the difference between
oblique and right ascension; -- used chiefly as expressing
the difference between the time of the rising or setting
of a body and six o'clock, or six hours from its meridian
passage.
[1913 Webster]Difference \Dif"fer*ence\, n. [F. diff['e]rence, L.
differentia.]
1. The act of differing; the state or measure of being
different or unlike; distinction; dissimilarity;
unlikeness; variation; as, a difference of quality in
paper; a difference in degrees of heat, or of light; what
is the difference between the innocent and the guilty?
[1913 Webster]
Differencies of administration, but the same Lord.
--1 Cor. xii.
5.
[1913 Webster]
2. Disagreement in opinion; dissension; controversy; quarrel;
hence, cause of dissension; matter in controversy.
[1913 Webster]
What was the difference? It was a contention in
public. --Shak.
[1913 Webster]
Away therefore went I with the constable, leaving
the old warden and the young constable to compose
their difference as they could. --T. Ellwood.
[1913 Webster]
3. That by which one thing differs from another; that which
distinguishes or causes to differ; mark of distinction;
characteristic quality; specific attribute.
[1913 Webster]
The marks and differences of sovereignty. --Davies.
[1913 Webster]
4. Choice; preference. [Obs.]
[1913 Webster]
That now he chooseth with vile difference
To be a beast, and lack intelligence. --Spenser.
[1913 Webster]
5. (Her.) An addition to a coat of arms to distinguish the
bearings of two persons, which would otherwise be the
same. See Augmentation, and Marks of cadency, under
Cadency.
[1913 Webster]
6. (Logic) The quality or attribute which is added to those
of the genus to constitute a species; a differentia.
[1913 Webster]
7. (Math.) The quantity by which one quantity differs from
another, or the remainder left after subtracting the one
from the other.
[1913 Webster]
Ascensional difference. See under Ascensional.
Syn: Distinction; dissimilarity; dissimilitude; variation;
diversity; variety; contrariety; disagreement; variance;
contest; contention; dispute; controversy; debate;
quarrel; wrangle; strife.
[1913 Webster] |
Difference
(gcide) | Difference \Dif"fer*ence\, v. t. [imp. & p. p. Differenced; p.
pr. & vb. n. Differencing.]
To cause to differ; to make different; to mark as different;
to distinguish.
[1913 Webster]
Thou mayest difference gods from men. --Chapman.
[1913 Webster]
Kings, in receiving justice and undergoing trial, are
not differenced from the meanest subject. --Milton.
[1913 Webster]
So completely differenced by their separate and
individual characters that we at once acknowledge them
as distinct persons. --Sir W.
Scott.
[1913 Webster]Difference \Dif"fer*ence\, n. [F. diff['e]rence, L.
differentia.]
1. The act of differing; the state or measure of being
different or unlike; distinction; dissimilarity;
unlikeness; variation; as, a difference of quality in
paper; a difference in degrees of heat, or of light; what
is the difference between the innocent and the guilty?
[1913 Webster]
Differencies of administration, but the same Lord.
--1 Cor. xii.
5.
[1913 Webster]
2. Disagreement in opinion; dissension; controversy; quarrel;
hence, cause of dissension; matter in controversy.
[1913 Webster]
What was the difference? It was a contention in
public. --Shak.
[1913 Webster]
Away therefore went I with the constable, leaving
the old warden and the young constable to compose
their difference as they could. --T. Ellwood.
[1913 Webster]
3. That by which one thing differs from another; that which
distinguishes or causes to differ; mark of distinction;
characteristic quality; specific attribute.
[1913 Webster]
The marks and differences of sovereignty. --Davies.
[1913 Webster]
4. Choice; preference. [Obs.]
[1913 Webster]
That now he chooseth with vile difference
To be a beast, and lack intelligence. --Spenser.
[1913 Webster]
5. (Her.) An addition to a coat of arms to distinguish the
bearings of two persons, which would otherwise be the
same. See Augmentation, and Marks of cadency, under
Cadency.
[1913 Webster]
6. (Logic) The quality or attribute which is added to those
of the genus to constitute a species; a differentia.
[1913 Webster]
7. (Math.) The quantity by which one quantity differs from
another, or the remainder left after subtracting the one
from the other.
[1913 Webster]
Ascensional difference. See under Ascensional.
Syn: Distinction; dissimilarity; dissimilitude; variation;
diversity; variety; contrariety; disagreement; variance;
contest; contention; dispute; controversy; debate;
quarrel; wrangle; strife.
[1913 Webster] |
Differenced
(gcide) | Difference \Dif"fer*ence\, v. t. [imp. & p. p. Differenced; p.
pr. & vb. n. Differencing.]
To cause to differ; to make different; to mark as different;
to distinguish.
[1913 Webster]
Thou mayest difference gods from men. --Chapman.
[1913 Webster]
Kings, in receiving justice and undergoing trial, are
not differenced from the meanest subject. --Milton.
[1913 Webster]
So completely differenced by their separate and
individual characters that we at once acknowledge them
as distinct persons. --Sir W.
Scott.
[1913 Webster] |
Indifference
(gcide) | Indifference \In*dif"fer*ence\, n. [L. indifferentia similarity,
lack of difference: cf. F. indiff['e]rence.]
[1913 Webster]
1. The quality or state of being indifferent, or not making a
difference; lack of sufficient importance to constitute a
difference; absence of weight; insignificance.
[1913 Webster]
2. Passableness; mediocrity.
[1913 Webster]
3. Impartiality; freedom from prejudice, prepossession, or
bias.
[1913 Webster]
He . . . is far from such indifference and equity as
ought and must be in judges which he saith I assign.
--Sir T. More.
[1913 Webster]
4. Absence of anxiety or interest in respect to what is
presented to the mind; unconcernedness; as, entire
indifference to all that occurs.
[1913 Webster]
Indifference can not but be criminal, when it is
conversant about objects which are so far from being
of an indifferent nature, that they are highest
importance. --Addison.
Syn: Carelessness; negligence; unconcern; apathy;
insensibility; coldness; lukewarmness.
[1913 Webster] |
iron out differences
(gcide) | Iron \I"ron\, v. t. [imp. & p. p. Ironed; p. pr. & vb. n.
Ironing.]
[1913 Webster]
1. To smooth with an instrument of iron; especially, to
smooth, as cloth, with a heated flatiron; -- sometimes
used with out.
[1913 Webster]
2. To shackle with irons; to fetter or handcuff. "Ironed like
a malefactor." --Sir W. Scott.
[1913 Webster]
3. To furnish or arm with iron; as, to iron a wagon.
iron out differences resolve differences; settle a dispute.
[PJC] Ironbark |
Tabular difference
(gcide) | Tabular \Tab"u*lar\, a. [L. tabularis, fr. tabula a board,
table. See Table.]
Having the form of, or pertaining to, a table (in any of the
uses of the word). Specifically:
[1913 Webster]
(a) Having a flat surface; as, a tabular rock.
[1913 Webster]
(b) Formed into a succession of flakes; laminated.
[1913 Webster]
Nodules . . . that are tabular and plated.
--Woodward.
[1913 Webster]
(c) Set in squares. [R.]
[1913 Webster]
(d) Arranged in a schedule; as, tabular statistics.
[1913 Webster]
(e) Derived from, or computed by, the use of tables; as,
tabular right ascension.
[1913 Webster]
Tabular difference (Math.), the difference between two
consecutive numbers in a table, sometimes printed in its
proper place in the table.
Tabular spar (Min.), wollastonite.
[1913 Webster] |
To make no difference
(gcide) | make \make\, v. t. [imp. & p. p. made (m[=a]d); p. pr. & vb.
n. making.] [OE. maken, makien, AS. macian; akin to OS.
mak?n, OFries. makia, D. maken, G. machen, OHG. mahh?n to
join, fit, prepare, make, Dan. mage. Cf. Match an equal.]
1. To cause to exist; to bring into being; to form; to
produce; to frame; to fashion; to create. Hence, in
various specific uses or applications:
(a) To form of materials; to cause to exist in a certain
form; to construct; to fabricate.
[1913 Webster]
He . . . fashioned it with a graving tool, after
he had made it a molten calf. --Ex. xxxii.
4.
[1913 Webster]
(b) To produce, as something artificial, unnatural, or
false; -- often with up; as, to make up a story.
[1913 Webster]
And Art, with her contending, doth aspire
To excel the natural with made delights.
--Spenser.
[1913 Webster]
(c) To bring about; to bring forward; to be the cause or
agent of; to effect, do, perform, or execute; -- often
used with a noun to form a phrase equivalent to the
simple verb that corresponds to such noun; as, to make
complaint, for to complain; to make record of, for to
record; to make abode, for to abide, etc.
[1913 Webster]
Call for Samson, that he may make us sport.
--Judg. xvi.
25.
[1913 Webster]
Wealth maketh many friends. --Prov. xix.
4.
[1913 Webster]
I will neither plead my age nor sickness in
excuse of the faults which I have made.
--Dryden.
[1913 Webster]
(d) To execute with the requisite formalities; as, to make
a bill, note, will, deed, etc.
(e) To gain, as the result of one's efforts; to get, as
profit; to make acquisition of; to have accrue or
happen to one; as, to make a large profit; to make an
error; to make a loss; to make money.
[1913 Webster]
He accuseth Neptune unjustly who makes shipwreck
a second time. --Bacon.
[1913 Webster]
(f) To find, as the result of calculation or computation;
to ascertain by enumeration; to find the number or
amount of, by reckoning, weighing, measurement, and
the like; as, he made the distance of; to travel over;
as, the ship makes ten knots an hour; he made the
distance in one day.
(h) To put in a desired or desirable condition; to cause
to thrive.
[1913 Webster]
Who makes or ruins with a smile or frown.
--Dryden.
[1913 Webster]
2. To cause to be or become; to put into a given state verb,
or adjective; to constitute; as, to make known; to make
public; to make fast.
[1913 Webster]
Who made thee a prince and a judge over us? --Ex.
ii. 14.
[1913 Webster]
See, I have made thee a god to Pharaoh. --Ex. vii.
1.
[1913 Webster]
Note: When used reflexively with an adjective, the reflexive
pronoun is often omitted; as, to make merry; to make
bold; to make free, etc.
[1913 Webster]
3. To cause to appear to be; to constitute subjectively; to
esteem, suppose, or represent.
[1913 Webster]
He is not that goose and ass that Valla would make
him. --Baker.
[1913 Webster]
4. To require; to constrain; to compel; to force; to cause;
to occasion; -- followed by a noun or pronoun and
infinitive.
[1913 Webster]
Note: In the active voice the to of the infinitive is usually
omitted.
[1913 Webster]
I will make them hear my words. --Deut. iv.
10.
[1913 Webster]
They should be made to rise at their early hour.
--Locke.
[1913 Webster]
5. To become; to be, or to be capable of being, changed or
fashioned into; to do the part or office of; to furnish
the material for; as, he will make a good musician; sweet
cider makes sour vinegar; wool makes warm clothing.
[1913 Webster]
And old cloak makes a new jerkin. --Shak.
[1913 Webster]
6. To compose, as parts, ingredients, or materials; to
constitute; to form; to amount to; as, a pound of ham
makes a hearty meal.
[1913 Webster]
The heaven, the air, the earth, and boundless sea,
Make but one temple for the Deity. --Waller.
[1913 Webster]
7. To be engaged or concerned in. [Obs.]
[1913 Webster]
Gomez, what makest thou here, with a whole
brotherhood of city bailiffs? --Dryden.
[1913 Webster]
8. To reach; to attain; to arrive at or in sight of. "And
make the Libyan shores." --Dryden.
[1913 Webster]
They that sail in the middle can make no land of
either side. --Sir T.
Browne.
[1913 Webster]
To make a bed, to prepare a bed for being slept on, or to
put it in order.
To make a card (Card Playing), to take a trick with it.
To make account. See under Account, n.
To make account of, to esteem; to regard.
To make away.
(a) To put out of the way; to kill; to destroy. [Obs.]
[1913 Webster]
If a child were crooked or deformed in body or
mind, they made him away. --Burton.
[1913 Webster]
(b) To alienate; to transfer; to make over. [Obs.]
--Waller.
To make believe, to pretend; to feign; to simulate.
To make bold, to take the liberty; to venture.
To make the cards (Card Playing), to shuffle the pack.
To make choice of, to take by way of preference; to choose.
To make danger, to make experiment. [Obs.] --Beau. & Fl.
To make default (Law), to fail to appear or answer.
To make the doors, to shut the door. [Obs.]
[1913 Webster]
Make the doors upon a woman's wit, and it will out
at the casement. --Shak.
[1913 Webster]
To make free with. See under Free, a.
To make good. See under Good.
To make head, to make headway.
To make light of. See under Light, a.
To make little of.
(a) To belittle.
(b) To accomplish easily.
To make love to. See under Love, n.
To make meat, to cure meat in the open air. [Colloq.
Western U. S.]
To make merry, to feast; to be joyful or jovial.
To make much of, to treat with much consideration,,
attention, or fondness; to value highly.
To make no bones. See under Bone, n.
To make no difference, to have no weight or influence; to
be a matter of indifference.
To make no doubt, to have no doubt.
To make no matter, to have no weight or importance; to make
no difference.
To make oath (Law), to swear, as to the truth of something,
in a prescribed form of law.
To make of.
(a) To understand or think concerning; as, not to know
what to make of the news.
(b) To pay attention to; to cherish; to esteem; to
account. "Makes she no more of me than of a slave."
--Dryden.
To make one's law (Old Law), to adduce proof to clear one's
self of a charge.
To make out.
(a) To find out; to discover; to decipher; as, to make out
the meaning of a letter.
(b) to gain sight of; to recognize; to discern; to descry;
as, as they approached the city, he could make out the
tower of the Chrysler Building.
(c) To prove; to establish; as, the plaintiff was unable
to make out his case.
(d) To make complete or exact; as, he was not able to make
out the money.
(d) to write out; to write down; -- used especially of a
bank check or bill; as, he made out a check for the
cost of the dinner; the workman made out a bill and
handed it to him.
To make over, to transfer the title of; to convey; to
alienate; as, he made over his estate in trust or in fee.
To make sail. (Naut.)
(a) To increase the quantity of sail already extended.
(b) To set sail.
To make shift, to manage by expedients; as, they made shift
to do without it. [Colloq.].
To make sternway, to move with the stern foremost; to go or
drift backward.
To make strange, to act in an unfriendly manner or as if
surprised; to treat as strange; as, to make strange of a
request or suggestion.
To make suit to, to endeavor to gain the favor of; to
court.
To make sure. See under Sure.
To make up.
(a) To collect into a sum or mass; as, to make up the
amount of rent; to make up a bundle or package.
(b) To reconcile; to compose; as, to make up a difference
or quarrel.
(c) To supply what is wanting in; to complete; as, a
dollar is wanted to make up the stipulated sum.
(d) To compose, as from ingredients or parts; to shape,
prepare, or fabricate; as, to make up a mass into
pills; to make up a story.
[1913 Webster]
He was all made up of love and charms!
--Addison.
[1913 Webster]
(e) To compensate; to make good; as, to make up a loss.
(f) To adjust, or to arrange for settlement; as, to make
up accounts.
(g) To dress and paint for a part, as an actor; as, he was
well made up.
To make up a face, to distort the face as an expression of
pain or derision.
To make up one's mind, to reach a mental determination; to
resolve.
To make way, or To make one's way.
(a) To make progress; to advance.
(b) To open a passage; to clear the way.
To make words, to multiply words.
[1913 Webster] |
difference limen
(wn) | difference limen
n 1: the smallest change in stimulation that a person can detect
[syn: difference threshold, differential threshold,
difference limen, differential limen] |
difference of opinion
(wn) | difference of opinion
n 1: a disagreement or argument about something important; "he
had a dispute with his wife"; "there were irreconcilable
differences"; "the familiar conflict between Republicans
and Democrats" [syn: dispute, difference, {difference
of opinion}, conflict] |
difference threshold
(wn) | difference threshold
n 1: the smallest change in stimulation that a person can detect
[syn: difference threshold, differential threshold,
difference limen, differential limen] |
indifference
(wn) | indifference
n 1: unbiased impartial unconcern
2: apathy demonstrated by an absence of emotional reactions
[syn: emotionlessness, impassivity, impassiveness,
phlegm, indifference, stolidity, unemotionality]
3: the trait of lacking enthusiasm for or interest in things
generally [syn: apathy, indifference, numbness,
spiritlessness]
4: the trait of remaining calm and seeming not to care; a casual
lack of concern [syn: nonchalance, unconcern,
indifference] |
just-noticeable difference
(wn) | just-noticeable difference
n 1: (psychophysics) the difference between two stimuli that
(under properly controlled experimental conditions) is
detected as often as it is undetected [syn: {just-
noticeable difference}, jnd] |
potential difference
(wn) | potential difference
n 1: the difference in electrical charge between two points in a
circuit expressed in volts [syn: electric potential,
potential, potential difference, potential drop,
voltage] |
rank-difference correlation
(wn) | rank-difference correlation
n 1: the most commonly used method of computing a correlation
coefficient between the ranks of scores on two variables
[syn: rank-order correlation coefficient, {rank-order
correlation}, rank-difference correlation coefficient,
rank-difference correlation] |
rank-difference correlation coefficient
(wn) | rank-difference correlation coefficient
n 1: the most commonly used method of computing a correlation
coefficient between the ranks of scores on two variables
[syn: rank-order correlation coefficient, {rank-order
correlation}, rank-difference correlation coefficient,
rank-difference correlation] |
difference engine
(foldoc) | Difference Engine
Charles Babbage's design for the first
automatic mechanical calculator. The Difference Engine was a
special purpose device intended for the production of
mathematical tables. Babbage started work on the Difference
Engine in 1823 with funding from the British Government. Only
one-seventh of the complete engine, about 2000 parts, was
built in 1832 by Babbage's engineer, Joseph Clement. This was
demonstrated successfully by Babbage and still works
perfectly. The engine was never completed and most of the
12,000 parts manufactured were later melted for scrap.
It was left to Georg and Edvard Schuetz to construct the first
working devices to the same design which were successful in
limited applications. The Difference Engine No. 2 was finally
completed in 1991 at the Science Museum, London, UK and is on
display there.
The engine used gears to compute cumulative sums in a series
of registers: r[i] := r[i] + r[i+1]. However, the addition
had the side effect of zeroing r[i+1]. Babbage overcame
this by simultaneously copying r[i+1] to a temporary register
during the addition and then copying it back to r[i+1] at the
end of each cycle (each turn of a handle).
{Difference Engine at the Science Museum
(http://nmsi.ac.uk/on-line/treasure/plan/2ndcomp.htm#babbage)}.
(1997-09-29)
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difference equation
(foldoc) | difference equation
A relation between consecutive elements of a
sequence. The first difference is
D u(n) = u(n+1) - u(n)
where u(n) is the nth element of sequence u. The second
difference is
D2 u(n) = D (D u(n))
= (u(n+2) - u(n+1)) - (u(n+1) - u(n))
= u(n+2) - 2u(n+1) + u(n)
And so on. A recurrence relation such as
u(n+2) + a u(n+1) + b u(n) = 0
can be converted to a difference equation (in this case, a
second order linear difference equation):
D2 u(n) + p D u(n) + q u(n) = 0
and vice versa. a, b, p, q are constants.
(1995-02-10)
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potential difference
(foldoc) | voltage
potential difference
(Or "potential difference", "electro-motive
force" (EMF)) A quantity measured as a signed difference
between two points in an electrical circuit which, when
divided by the resistance in Ohms between those points,
gives the current flowing between those points in Amperes,
according to Ohm's Law. Voltage is expressed as a signed
number of Volts (V). The voltage gradient in Volts per metre
is proportional to the force on a charge.
Voltages are often given relative to "earth" or "ground" which
is taken to be at zero Volts. A circuit's earth may or may
not be electrically connected to the actual earth.
The voltage between two points is also given by the charge
present between those points in Coulombs divided by the
capacitance in Farads. The capacitance in turn depends on
the dielectric constant of the insulators present.
Yet another law gives the voltage across a piece of circuit as
its inductance in Henries multiplied by the rate of change
of current flow through it in Amperes per second.
A simple analogy likens voltage to the pressure of water in a
pipe. Current is likened to the amount of water (charge)
flowing per unit time.
(1995-12-04)
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DIFFERENCE
(bouvier) | DIFFERENCE. A dispute, contest, disagreement, quarrel.
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