| slovo | definícia |
accumulator
(encz) | accumulator,akumulátor n: Zdeněk Brož |
Accumulator
(gcide) | Accumulator \Ac*cu"mu*la`tor\, n. [L.]
1. One who, or that which, accumulates, collects, or amasses.
[1913 Webster]
2. (Mech.) An apparatus by means of which energy or power can
be stored, such as the cylinder or tank for storing water
for hydraulic elevators, the secondary or storage battery
used for accumulating the energy of electrical charges,
etc.
[1913 Webster]
3. A system of elastic springs for relieving the strain upon
a rope, as in deep-sea dredging.
[1913 Webster] |
accumulator
(wn) | accumulator
n 1: a person who is employed to collect payments (as for rent
or taxes) [syn: collector, gatherer, accumulator]
2: a voltaic battery that stores electric charge [syn: {storage
battery}, accumulator]
3: (computer science) a register that has a built-in adder that
adds an input number to the contents of the register [syn:
accumulator, accumulator register] |
accumulator
(foldoc) | accumulator
In a central processing unit, a register in
which intermediate results are stored. Without an
accumulator, it would be necessary to write the result of each
calculation (addition, multiplication, shift, etc.) to {main
memory} and read them back. Access to main memory is slower
than access to the accumulator which usually has direct paths
to and from the arithmetic and logic unit (ALU).
The canonical example is summing a list of numbers. The
accumulator is set to zero initially, each number in turn is
added to the value in the accumulator and only when all
numbers have been added is the result written to main memory.
Modern CPUs usually have many registers, all or many of which
can be used as accumulators. For this reason, the term
"accumulator" is somewhat archaic. Use of it as a synonym for
"register" is a fairly reliable indication that the user has
been around for quite a while and/or that the architecture
under discussion is quite old. The term in full is almost
never used of microprocessor registers, for example, though
symbolic names for arithmetic registers beginning in "A"
derive from historical use of the term "accumulator" (and not,
actually, from "arithmetic"). Confusingly, though, an "A"
register name prefix may also stand for "address", as for
example on the Motorola 680x0 family.
2. A register, memory location or variable being
used for arithmetic or logic (as opposed to addressing or a
loop index), especially one being used to accumulate a sum or
count of many items. This use is in context of a particular
routine or stretch of code. "The FOOBAZ routine uses A3 as an
accumulator."
[Jargon File]
(1999-04-20)
|
accumulator
(jargon) | accumulator
n. obs.
1. Archaic term for a register. On-line use of it as a synonym for register
is a fairly reliable indication that the user has been around for quite a
while and/or that the architecture under discussion is quite old. The term
in full is almost never used of microprocessor registers, for example,
though symbolic names for arithmetic registers beginning in ‘A’ derive from
historical use of the term accumulator (and not, actually, from
‘arithmetic’). Confusingly, though, an ‘A’ register name prefix may also
stand for address, as for example on the Motorola 680x0 family.
2. A register being used for arithmetic or logic (as opposed to addressing
or a loop index), especially one being used to accumulate a sum or count of
many items. This use is in context of a particular routine or stretch of
code. “The FOOBAZ routine uses A3 as an accumulator.”
3. One's in-basket (esp. among old-timers who might use sense 1). “You want
this reviewed? Sure, just put it in the accumulator.” (See stack.)
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| | podobné slovo | definícia |
lead-acid accumulator
(encz) | lead-acid accumulator, n: |
nickel-cadmium accumulator
(encz) | nickel-cadmium accumulator, n: |
nickel-iron accumulator
(encz) | nickel-iron accumulator, n: |
Accumulator
(gcide) | Accumulator \Ac*cu"mu*la`tor\, n. [L.]
1. One who, or that which, accumulates, collects, or amasses.
[1913 Webster]
2. (Mech.) An apparatus by means of which energy or power can
be stored, such as the cylinder or tank for storing water
for hydraulic elevators, the secondary or storage battery
used for accumulating the energy of electrical charges,
etc.
[1913 Webster]
3. A system of elastic springs for relieving the strain upon
a rope, as in deep-sea dredging.
[1913 Webster] |
Hydraulic accumulator
(gcide) | Hydraulic \Hy*drau"lic\, a. [F. hydraulique, L. hydraulicus, fr.
Gr. ?, ?, a water organ; "y`dwr water + ? flute, pipe. See
Hydra.]
Of or pertaining to hydraulics, or to fluids in motion;
conveying, or acting by, water; as, an hydraulic clock,
crane, or dock.
[1913 Webster]
Hydraulic accumulator, an accumulator for hydraulic
machinery of any kind. See Accumulator, 2.
Hydraulic brake, a cataract. See Cataract, 3.
Hydraulic cement, a cement or mortar made of hydraulic
lime, which will harden under water.
Hydraulic elevator, a lift operated by the weight or
pressure of water.
Hydraulic jack. See under Jack.
Hydraulic lime, quicklime obtained from hydraulic
limestone, and used for cementing under water, etc.
Hydraulic limestone, a limestone which contains some clay,
and which yields a quicklime that will set, or form a
firm, strong mass, under water.
Hydraulic main (Gas Works), a horizontal pipe containing
water at the bottom into which the ends of the pipes from
the retorts dip, for passing the gas through water in
order to remove ammonia.
Hydraulic mining, a system of mining in which the force of
a jet of water is used to wash down a bank of gold-bearing
gravel or earth. [Pacific Coast]
Hydraulic press, a hydrostatic press. See under
Hydrostatic.
Hydraulic propeller, a device for propelling ships by means
of a stream of water ejected under water rearward from the
ship.
Hydraulic ram, a machine for raising water by means of the
energy of the moving water of which a portion is to be
raised. When the rush of water through the main pipe d
shuts the valve at a, the momentum of the current thus
suddenly checked forces part of it into the air chamber b,
and up the pipe c, its return being prevented by a valve
at the entrance to the air chamber, while the dropping of
the valve a by its own weight allows another rush through
the main pipe, and so on alternately.
Hydraulic valve. (Mach.)
(a) A valve for regulating the distribution of water in the
cylinders of hydraulic elevators, cranes, etc.
(b) (Gas Works) An inverted cup with a partition dipping into
water, for opening or closing communication between two
gas mains, the open ends of which protrude about the
water.
[1913 Webster] |
accumulator register
(wn) | accumulator register
n 1: (computer science) a register that has a built-in adder
that adds an input number to the contents of the register
[syn: accumulator, accumulator register] |
lead-acid accumulator
(wn) | lead-acid accumulator
n 1: a battery with lead electrodes with dilute sulphuric acid
as the electrolyte; each cell generates about 2 volts [syn:
lead-acid battery, lead-acid accumulator] |
nickel-cadmium accumulator
(wn) | nickel-cadmium accumulator
n 1: a rechargeable battery with a nickel cathode and a cadmium
anode; often used in emergency systems because of its low
discharge rate when not in use [syn: nicad, {nickel-
cadmium accumulator}] |
nickel-iron accumulator
(wn) | nickel-iron accumulator
n 1: a storage battery having a nickel oxide cathode and an iron
anode with an electrolyte of potassium hydroxide; each cell
gives about 1.2 volts [syn: nickel-iron battery, {nickel-
iron accumulator}] |
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