| 词条 | Random.org |
| 释义 |
| name = Random.org | logo = Random.org logo.svg | logo_size = 250px | screenshot = random.org screenshot 2009-10-23.png | screenshot_size = 250px | caption = Random.org as of October, 2009 | url = [//www.random.org/ Random.org] | alexa = {{Decrease}} 8,701 ({{as of|2018|05|30|alt=May 2018}})[1] | commercial = | type = Web service | language = English | registration = optional | owner = Mads Haahr | author = Mads Haahr | launch date = 1998 | current status = online | revenue = | slogan = | content license = }}Random.org is a website that produces random numbers based on atmospheric noise.[2] In addition to generating random numbers in a specified range and subject to a specified probability distribution, it has free tools to simulate events such as flipping coins, shuffling cards, and rolling dice. It also offers paid services to generate longer sequences of random numbers and act as a third-party arbiter for raffles, sweepstakes, and promotions. The website was created in 1998 by Mads Haahr,[3][4] a doctor and computer science professor at Trinity College in Dublin, Ireland. Random numbers are generated based on atmospheric noise captured by several radios tuned between stations.[5][6] BitsA binary digit (bit) can be either 0 or 1. There are several Random.org radios located in Copenhagen, Dublin, and Ballsbridge, each generating 3,000 bits per second from the atmospheric noise picked up.[7] The generators produce a continuous string of random bits which are converted into the form requested (integer, Gaussian distribution, etc.) QuotaThere are limits to the number of bits supplied to a particular IP address. A new user (identified by IP address) starts with a free-of-charge quota of 1,000,000 bits which is depleted every time bits are supplied, and topped up by 200,000 bits (or to 1,000,000 bits if the user has more than 800,000 bits remaining) every day at midnight UTC. Larger numbers of bits can be purchased for US$10 for 10 million bits with no time limit, less per bit for larger quantities.[8] References1. ^{{cite web|url= http://www.alexa.com/siteinfo/Random.org |title= Random.org Site Info | publisher= Alexa Internet |accessdate= 2016-10-19 }} 2. ^{{cite news |last=O'Connell |first=Pamela LiCalzi |title=Lottery Numbers and Books With a Voice |url=https://www.nytimes.com/2004/04/08/technology/circuits/08diar.html |accessdate=2009-10-23 |date=2004-04-08 |publisher=New York Times |quote=Other sites also offer true random numbers, said Mads Haahr, lecturer in computer science at Trinity College, Dublin |deadurl=yes |archiveurl=https://web.archive.org/web/20090726093822/http://www.nytimes.com/2004/04/08/technology/circuits/08diar.html |archivedate=July 26, 2009 |df= }} 3. ^{{cite web | last = McNichol | first = Tom | title = Totally Random | url = https://www.wired.com/wired/archive/11.08/random.html | accessdate = 2009-10-23 | date = 2003-08-11 | publisher = Conde Nast Publications | page = 2 | quote = Mads Haahr, a lecturer in computer science at Trinity College in Dublin, designed the system}} 4. ^{{cite news | last = Klarreich | first = Erica | title = Take a chance: scientists put randomness to work | url = http://www.accessmylibrary.com/article-1G1-126447247/take-chance-scientists-put.html | archiveurl = //www.random.org/media/ScienceNews-2004.html | archivedate = 2009-10-23 | date = 2004-12-04 | publisher = Science News | quote = Haahr's Web site (//www.random.org/) can generate up to 3,000 random numbers per second}} 5. ^{{cite news | last = Johnson | first = George | title = Connoisseurs of Chaos Offer A Valuable Product: Randomness | url = https://www.nytimes.com/2001/06/12/science/connoisseurs-of-chaos-offer-a-valuable-product-randomness.html | accessdate = 2009-10-23 | date = 2001-06-12 | publisher = New York Times | quote = Random.org generates unpredictable sequences of data using a radio tuned between stations, harvesting the atmospheric noise}} 6. ^{{cite news | last = Bialik | first = Carl | title = How Random Is the iPod's Shuffle? | url = https://www.wsj.com/articles/SB115876952162469003 | accessdate = 2009-10-23 | date = 2009-10-14 | publisher = Wall Street Journal}} 7. ^[https://www.random.org/history/ random.org: History] 8. ^{{cite web |url=//www.random.org/quota/ |title=Your Quota |publisher=Random.org |accessdate=2011-10-30}} External links
2 : Irish websites|Random number generation |
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