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X 2
X2 may refer to: Computers * X2 (protocol), a pre-V.90 standard for 56k downstream modem communications * Athlon 64 X2, the first dual-core desktop CPU manufactured by AMD * A two-lane PCI Express, slot * A type of 10 Gigabit Ethernet, optical transceiver * X2, a transport interface used to connect enodeBs in a LTE/4G network Vehicles and transportation * Bathyscaphe ''Trieste II'', also known as ''X-2'', the US Navy bathyscaphe based on the ''Trieste'' * Bell X-2, an experimental supersonic aircraft * BMW X2, a SUV vehicle produced by BMW * HMS ''X2'', a Royal Navy submarine * Kawasaki X2, a personal water craft * Mitsubishi X-2 Shinshin, a Japanese experimental stealth fighter (formerly known as ATD-X) * North Wing Sport X2, an American ultralight trike design * Orba, also known as ''X-2'', a planned British satellite * Sikorsky X2, a prototype, coaxial high-speed helicopter * SJ X2, used for the X 2000 train system in Sweden * Skycycle X-2, a rocket used by Evel Kniev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chi-squared Distribution
In probability theory and statistics, the chi-squared distribution (also chi-square or \chi^2-distribution) with k degrees of freedom is the distribution of a sum of the squares of k independent standard normal random variables. The chi-squared distribution is a special case of the gamma distribution and is one of the most widely used probability distributions in inferential statistics, notably in hypothesis testing and in construction of confidence intervals. This distribution is sometimes called the central chi-squared distribution, a special case of the more general noncentral chi-squared distribution. The chi-squared distribution is used in the common chi-squared tests for goodness of fit of an observed distribution to a theoretical one, the independence of two criteria of classification of qualitative data, and in confidence interval estimation for a population standard deviation of a normal distribution from a sample standard deviation. Many other statistical tests a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X2 (protocol)
A modulator-demodulator or modem is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio. A modem transmits data by Modulation#Digital modulation methods, modulating one or more carrier wave signals to encode digital information, while the receiver Demodulation, demodulates the signal to recreate the original digital information. The goal is to produce a Signal (electronics), signal that can be transmitted easily and decoded reliably. Modems can be used with almost any means of transmitting analog signals, from light-emitting diodes to radio. Early modems were devices that used audible sounds suitable for transmission over traditional telephone systems and leased lines. These generally operated at 110 or 300 bits per second (bit/s), and the connection between devices was normally manual, using an attached telephone handset. By the 1970s, higher speeds of 1,200 and 2,400 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X2 (New York City Bus)
The Metropolitan Transportation Authority (MTA) operates 80 express bus routes in New York City, United States. Generally, express routes operated by MTA Bus Company are assigned multi-borough (BM, BxM, QM, SIM) prefixes. Exceptions to this rule are 7 Brooklyn and Queens express routes operated by MTA New York City Transit. Those routes use an X prefix. The unidirectional fare, payable with MetroCard or OMNY, a contactless payment system which will replace the Metrocard by 2023, is $6.75. Discount fare media is available. Except for the ad hoc X80 service, coins are not accepted on express buses; only a MetroCard (for now) or OMNY is accepted. Express buses operate using over-the-road diesel-powered, 45-ft-long coaches, from Motor Coach Industries and Prevost Car. See also: MTA Regional Bus Operations Bus Fleet Manhattan to Staten Island Most routes travel to and from Staten Island via the Verrazzano-Narrows Bridge, Gowanus Expressway, and Hugh L. Carey Tunnel into Lower Manha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square (algebra)
In mathematics, a square is the result of multiplication, multiplying a number by itself. The verb "to square" is used to denote this operation. Squaring is the same as exponentiation, raising to the power 2 (number), 2, and is denoted by a superscript 2; for instance, the square of 3 may be written as 32, which is the number 9. In some cases when superscripts are not available, as for instance in programming languages or plain text files, the notations ''x''^2 (caret) or ''x''**2 may be used in place of ''x''2. The adjective which corresponds to squaring is ''wikt:quadratic, quadratic''. The square of an integer may also be called a square number or a perfect square. In algebra, the operation of squaring is often generalized to polynomials, other expression (mathematics), expressions, or values in systems of mathematical values other than the numbers. For instance, the square of the linear function (calculus), linear polynomial is the quadratic polynomial . One of the imp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X2 (roller Coaster)
X2 (formerly known as X) is a steel roller coaster operating at Six Flags Magic Mountain in Valencia, California. It is the world's first 4th Dimension roller coaster and was the final roller coaster conceived and installed by ride manufacturer Arrow Dynamics. The ride is unique in that the trains' seats pitch 360 degrees forwards and in reverse independent of the main chassis. The coaster initially opened to the public on January 12, 2002; numerous malfunctions delayed it from debuting in 2001 as was originally anticipated. On December 2, 2007, the ride closed for its transformation into X2. It was completely repainted, received new third-generation trains, and featured new special effects including a sound system and a pair of flame throwers. The ride reopened on May 24, 2008, following the upgrades. History On December 19, 2000, Six Flags Magic Mountain announced that it would be adding three roller coasters for the 2001 season as part of a $30 million expansion: Déjà ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Of The Union
The State of the Union Address (sometimes abbreviated to SOTU) is an annual message delivered by the president of the United States to the U.S. Congress near the beginning of each calendar year on the current condition of the nation. The State of the Union Address generally includes reports on the nation's budget, economy, news, agenda, achievements and the president's priorities and legislative proposals. The address fulfills the requirement in Article II, Section 3, Clause 1 of the U.S. Constitution for the president to periodically "give to the Congress Information of the State of the Union, and recommend to their Consideration such measures as he shall judge necessary and expedient." During most of the country's first century, the president primarily submitted only a written report to Congress. After 1913, Woodrow Wilson, the 28th U.S. president, began the regular practice of delivering the address to Congress in person as a way to rally support for the president's ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X2 (film)
''X2'' (also marketed as ''X2: X-Men United,'' and internationally as ''X-Men 2'') is a 2003 American superhero film directed by Bryan Singer and written by Michael Dougherty, Dan Harris (screenwriter), Dan Harris and David Hayter, from a story by Singer, Hayter and Zak Penn. The film is based on the X-Men superhero team appearing in Marvel Comics. It is the sequel to ''X-Men (film), X-Men'' (2000), as well as the second installment in the X-Men (film series), ''X-Men'' film series, and features an ensemble cast including Patrick Stewart, Hugh Jackman, Ian McKellen, Halle Berry, Famke Janssen, James Marsden, Rebecca Romijn, Rebecca Romijn-Stamos, Brian Cox (actor), Brian Cox, Alan Cumming, Bruce Davison, Shawn Ashmore, Aaron Stanford, Kelly Hu, and Anna Paquin. Its plot, inspired by the graphic novel ''X-Men: God Loves, Man Kills, God Loves, Man Kills'', concerns the genocide, genocidal Colonel William Stryker leading an assault on Charles Xavier (film character), Professor Xavi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
