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bus    音标拼音: [b'ʌs]
n. 公共汽车

公共汽车

bus
汇流排


bus
多汇流排

bus
汇流排

bus
n 1: a vehicle carrying many passengers; used for public
transport; "he always rode the bus to work" [synonym: {bus},
{autobus}, {coach}, {charabanc}, {double-decker}, {jitney},
{motorbus}, {motorcoach}, {omnibus}, {passenger vehicle}]
2: the topology of a network whose components are connected by a
busbar [synonym: {bus topology}, {bus}]
3: an electrical conductor that makes a common connection
between several circuits; "the busbar in this computer can
transmit data either way between any two components of the
system" [synonym: {busbar}, {bus}]
4: a car that is old and unreliable; "the fenders had fallen off
that old bus" [synonym: {bus}, {jalopy}, {heap}]
v 1: send or move around by bus; "The children were bussed to
school"
2: ride in a bus
3: remove used dishes from the table in restaurants

Bus \Bus\, n. [Abbreviated from omnibus.]
An omnibus. [Colloq.]
[1913 Webster] busbar

66 Moby Thesaurus words for "bus":
auto, autobus, autocar, automobile, barge, bicycle, bike, boat,
buggy, cab, car, cart, catch a train, chartered bus, chauffeur,
coach, crate, cycle, diligence, double-decker, dray, drive,
entrain, ferry, float, go by rail, hack, haul, heap, hired car,
jalopy, jitney, joyride, lighter, machine, mail coach,
make a train, motor, motor coach, motor vehicle, motorbus,
motorcar, motorcycle, motorized vehicle, omnibus, pedal,
post coach, raft, ride, ship, sled, sledge, stage, stagecoach,
take a joyride, taxi, taxicab, truck, tub, van, voiture, wagon,
wheel, wheelbarrow, wheels, wreck

A set of electrical conductors
(wires, PCB tracks or connections in an {integrated circuit})
connecting various "stations", which can be {functional units}
in a computer or {nodes} in a {network}. A bus is a
{broadcast} channel, meaning that each station receives every
other station's transmissions and all stations have equal
access to the bus.

Various schemes have been invented to solve the problem of
collisions: multiple stations trying to transmit
at once, e.g. {CSMA/CD}, {bus master}.

The term is almost certainly derived from the electrical
engineering term "bus bar" - a substantial, rigid power supply
conductor to which several connections are made. This was
once written "'bus bar" as it was a contraction of "omnibus
bar" - a connection bar "for all", by analogy with the
passenger omnibus - a conveyance "for all".

{More on derivation (http://foldoc.org/pub/misc/omnibus.html)}.

There are busses both within the {CPU} and connecting it to
external {memory} and {peripheral} devices. The data bus,
address bus and control signals, despite their names, really
constitute a single bus since each is useless without the
others.

The width of the data bus is usually specified in {bits} and
is the number of parallel connectors. This and the {clock
rate} determine the bus's data rate (the number of {bytes} per
second which it can carry). This is one of the factors
limiting a computer's performance. Most current
{microprocessors} have 32-bit busses both internally and
externally. 100 or 133 {megahertz} bus clock rates are
common. The bus clock is typically slower than the processor
clock.

Some processors have internal busses which are wider than
their external busses (usually twice the width) since the
width of the internal bus affects the speed of all operations
and has less effect on the overall system cost than the width
of the external bus.

Various bus designs have been used in the {PC}, including
{ISA}, {EISA}, {Micro Channel}, {VL-bus} and {PCI}. Other
peripheral busses are NuBus, TURBOchannel, VMEbus, MULTIBUS and
STD bus.

See also {bus network}.

{Ukranian (http://open-taxi.com/mynews/~adrian/10)}.

(2010-07-10)

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