busy beaver - определение. Что такое busy beaver
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Что (кто) такое busy beaver - определение

A HALTING, BINARY-ALPHABET TURING MACHINE WHICH WRITES THE MOST 1S ON THE TAPE, USING ONLY A LIMITED SET OF STATES
Busy Beaver; Busy beaver function; Busy beaver problem; Busy Beaver function; Busy Beaver problem; Busy Beaver Problem; Busy Beaver Number; Maximum shifts function; Busy-beaver; N-state busy beaver game; BB-n game; Generalized busy beaver functions; Busy Beaver game
  • Animation of a 3-state, 2-symbol busy beaver
  • Animation of a 4-state, 2-symbol busy beaver
  • Shows the first 100,000 timesteps of the current best 5-state busy beaver. Orange is "1", white is "0" (image compressed vertically).
Найдено результатов: 310
Busy Beaver         
<theory> (BB) One of a series of sets of Turing Machine programs. The BBs in the Nth set are programs of N states that produce a larger finite number of ones on an initially blank tape than any other program of N states. There is no program that, given input N, can deduce the productivity (number of ones output) of the BB of size N. The productivity of the BB of size 1 is 1. Some work has been done to figure out productivities of bigger Busy Beavers - the 7th is in the thousands. (1994-10-24)
Busy beaver (disambiguation)         
WIKIMEDIA DISAMBIGUATION PAGE
Busy beaver is an English language idiom describing of a person who is particularly busy or industrious. Busy beaver and related terms may also refer to:
Busy Beavers         
ONLINE CHILDREN'S EDUCATIONAL PROGRAM
Draft:Busy Beavers; We Are Busy Beavers; Billy Beaver; Betty Beaver; Busy Beavers TV; Busy Beavers Jukebox; Baby Beavers
Busy Beavers (also known as We Are Busy Beavers) is an online children's educational program. It is aimed at parents and teachers of toddlers who speak English or are learning English as a second language, and parents of children with a learning disability, autism or delayed speech.
busy-wait         
COMPUTER PROGRAMMATION TECHNIQUE IN WHICH A PROCESS REPEATEDLY CHECKS TO SEE IF A CONDITION IS TRUE
Busy spin; Busy-wait; Busy-loop; Busy loop; Busy wait; Busy-wait loop; Busy-wait loops; Busy wait loops; Busy wait loop; Busy-waiting
<programming> To wait for an event by spinning through a tight loop or timed-delay loop that polls for the event on each pass, as opposed to setting up an interrupt handler and continuing execution on another part of the task. This is a wasteful technique, best avoided on time-sharing systems where a busy-waiting program may hog the processor. [Jargon File] (1999-06-10)
Busy waiting         
COMPUTER PROGRAMMATION TECHNIQUE IN WHICH A PROCESS REPEATEDLY CHECKS TO SEE IF A CONDITION IS TRUE
Busy spin; Busy-wait; Busy-loop; Busy loop; Busy wait; Busy-wait loop; Busy-wait loops; Busy wait loops; Busy wait loop; Busy-waiting
In computer science and software engineering, busy-waiting, busy-looping or spinning is a technique in which a process repeatedly checks to see if a condition is true, such as whether keyboard input or a lock is available. Spinning can also be used to generate an arbitrary time delay, a technique that was necessary on systems that lacked a method of waiting a specific length of time.
busy-loop         
COMPUTER PROGRAMMATION TECHNIQUE IN WHICH A PROCESS REPEATEDLY CHECKS TO SEE IF A CONDITION IS TRUE
Busy spin; Busy-wait; Busy-loop; Busy loop; Busy wait; Busy-wait loop; Busy-wait loops; Busy wait loops; Busy wait loop; Busy-waiting
The Lion's Busy         
1950 FILM BY FRIZ FRELENG
The Lions Busy
The Lion's Busy is a 1950 Warner Bros. Looney Tunes cartoon written by Tedd Pierce and directed by Friz Freleng.
Beaver coins         
Beaver dollar; Beaver Money; Beaver gold coins; Oregon gold coinage; Oregon gold coins; Beaver Coins; Gold beaver; Beaver coin; Oregon gold; Oregon territorial gold
Beaver Coins, also known in pioneer days as Beaver Money, were gold coins minted in Oregon in 1849. Their name comes from the prominent beaver depicted on the obverse of the coins.
Roger A. Beaver         
ENTOMOLOGIST
R A Beaver; R.A. Beaver; RA Beaver; R. A. Beaver; Roger Beaver
Roger A. Beaver is a biologist who has worked at University College of North Wales, Chiang Mai University, the University of Zambia and the University of the South Pacific.
Busy Bee         
  • Fokker F-27 in Air Executive livery in 1978
  • Boeing 737-200C]] at [[Faro Airport]] in 1984.
  • Busy Bee [[Boeing 737-200]] at [[Aberdeen Airport]]
  • Fokker F27-200 Friendships]] landing at [[London Heathrow Airport]] in 1989
  • Fokker F27-100 Friendships]] which was taken over from [[Braathens SAFE]], here depicted at [[Basel Airport]] in 1982
  • Boeing 737-200C]] at [[Rotterdam The Hague Airport]] in 1987.  This plane will later be sold to [[Sahara Airlines]]. It will later be involved in [[1994 Sahara Airlines Boeing 737 crash]]
FORMER NORWEGIAN CHARTER AIRLINE
Airexecutive Norway; Busy Bee Air Service; Busy Bee of Norway; Air Executive Norway
Busy Bee was an airline which operated in Norway between 1966 and 1992. Entirely based around wet lease, it conducted a mix of regional services for larger airlines and the military, as well as corporate, ad hoc and inclusive tour charters.

Википедия

Busy beaver

In theoretical computer science, the busy beaver game aims at finding a terminating program of a given size that produces the most output possible. Since an endlessly looping program producing infinite output is easily conceived, such programs are excluded from the game.

More precisely, the busy beaver game consists of designing a halting Turing machine with alphabet {0,1} which writes the most 1s on the tape, using only a given set of states. The rules for the 2-state game are as follows:

  1. the machine must have two states in addition to the halting state, and
  2. the tape initially contains 0s only.

A player should conceive a transition table aiming for the longest output of 1s on the tape while making sure the machine will halt eventually.

An nth busy beaver, BB-n or simply "busy beaver" is a Turing machine that wins the n-state Busy Beaver Game. That is, it attains the largest number of 1s among all other possible n-state competing Turing Machines. The BB-2 Turing machine, for instance, achieves four 1s in six steps.

Determining whether an arbitrary Turing machine is a busy beaver is undecidable. This has implications in computability theory, the halting problem, and complexity theory. The concept was first introduced by Tibor Radó in his 1962 paper, "On Non-Computable Functions".