• Thumbnail for Allan variance
    The Allan variance (AVAR), also known as two-sample variance, is a measure of frequency stability in clocks, oscillators and amplifiers. It is named after...
    64 KB (9,318 words) - 19:58, 20 April 2024
  • Thumbnail for Modified Allan variance
    The modified Allan variance (MVAR), also known as mod σy2(τ), is a variable bandwidth modified variant of Allan variance, a measurement of frequency stability...
    5 KB (587 words) - 21:18, 1 April 2024
  • Thumbnail for David W. Allan
    Wayne Allan (born September 25, 1936) is an American atomic clock physicist and author of the Allan variance, also known as the two-sample variance, a measure...
    6 KB (569 words) - 22:15, 11 September 2024
  • stability of Allan deviation. It is commonly defined from the modified Allan deviation, but other estimators may be used. Time variance (TVAR) also known...
    2 KB (295 words) - 18:08, 23 June 2024
  • Thumbnail for Statistical dispersion
    Department of Commerce. "Allan Variance -- Overview by David W. Allan". www.allanstime.com. Retrieved 2021-09-16. "Hadamard Variance". www.wriley.com. Retrieved...
    7 KB (936 words) - 23:55, 23 June 2024
  • Thumbnail for Pink noise
    between ticks of the physical clock and ticks of an ideal clock. The Allan variance of the clock frequency is half the mean square of change in average...
    54 KB (6,620 words) - 08:52, 11 November 2024
  • Thumbnail for Network Time Protocol
    the reference ntpd and chrony, using samba for the domain connection. Allan variance – Measure of frequency stability in clocks and oscillators Clock network –...
    57 KB (5,965 words) - 19:10, 28 October 2024
  • computer-generated imagery Avar(), symbol for asymptotic variance, in statistics Allan variance, a statistical measure of frequency stability Trade name...
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  • Thumbnail for Clock
    d'Horlogerie de Genève [de] (GPHG) Goldene Unruh [de] 24-hour analog dial Allan variance Allen-Bradley Clock Tower at Rockwell Automation Headquarters Building...
    96 KB (11,212 words) - 02:53, 6 November 2024
  • Thumbnail for Phase noise
    frequency range by filters in the IF (intermediate frequency) amplifier. Allan variance Flicker noise Leeson's equation Maximum time interval error Noise spectral...
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  • systems used in nuclear power generating stations. Data acquisition (DAQ) Allan variance Photomultiplier Positron emission tomography Class-D amplifier W. R...
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  • the course of synchronisation, which optimises the method by itself. Allan variance Berkeley algorithm Clock synchronization Daytime Protocol, older time...
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    clock manufacturers List of watch manufacturers Winthrop Kellogg Edey Allan variance Clock drift International Earth Rotation and Reference Systems Service...
    27 KB (3,238 words) - 04:03, 20 October 2024
  • Thumbnail for Crystal oscillator
    stresses. The short-term stability is measured by four main parameters: Allan variance (the most common one specified in oscillator data sheets), phase noise...
    89 KB (9,497 words) - 00:24, 8 November 2024
  • Algorithmic inference Algorithms for calculating variance All models are wrong All-pairs testing Allan variance Alignments of random points Almost surely Alpha...
    87 KB (8,285 words) - 04:29, 7 October 2024
  • Frequency drift Frequency deviation Jitter Automatic frequency control Allan variance Rudolf Kingslake (2 December 2012). Applied Optics and Optical Engineering...
    1 KB (119 words) - 19:29, 24 November 2017
  • Thumbnail for Median
    the minimum-variance mean (for large normal samples), which is to say the variance of the median will be ~50% greater than the variance of the mean....
    62 KB (7,974 words) - 11:08, 2 November 2024
  • and necessary result of modulation in both FM and phase modulation. Allan variance Clock drift Phase noise Automatic frequency control (AFC) Phase-locked...
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  • gives a chart useful for characterizing the stability of the clock. Allan variance Clock drift Instantaneous phase Jitter Phase noise Plesiochronous digital...
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  • (the time between successive measurements of the atomic system). The Allan variance for an oscillator with White frequency noise is given by σ y 2 ( τ )...
    51 KB (6,985 words) - 00:14, 17 July 2024
  • 350–1050 nm 60 μrad/pixel Cassini ISS RSE Radio Science Experiment Allan variance of radio oscillators: T = 100 s of 1×10−13 Transponders operating at...
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  • Thumbnail for Pressure reference system
    sensors used within the IMU. The sensor quality can be evaluated by Allan Variance technique. A precise IMU uses laser gyroscopes and precise accelerometers...
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  • of transformations); for example, the sample variance is a biased estimator for the population variance. These are all illustrated below. An unbiased...
    34 KB (5,359 words) - 21:46, 1 November 2024
  • estimate (MLE), the square root of the variance. There are several ways to consistently estimate the variance matrix which in finite samples leads to...
    17 KB (2,232 words) - 23:13, 22 March 2024
  • Thumbnail for Multivariate normal distribution
    X i {\displaystyle X_{i}} are independent and each is a zero-mean unit-variance normally distributed random variable, i.e. if X i ∼   N ( 0 , 1 ) {\displaystyle...
    65 KB (9,519 words) - 19:47, 3 October 2024
  • Thumbnail for Statistics
    Mendelian Inheritance (which was the first to use the statistical term, variance), his classic 1925 work Statistical Methods for Research Workers and his...
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  • premiere on 1 September 2022. National Geographic, in partnership with Variance Films, gave the film a limited theatrical release beginning in New York...
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  • Kirrilee Berger, Jonathan Jackson, Candace Cameron Bure, Lucas Black Breathe Variance Films / Thunder Road Films Stefon Bristol (director); Doug Simon (screenplay);...
    295 KB (10,694 words) - 21:19, 11 November 2024
  • Demographics Environment Gender fluidity Gender identity Gender role Gender variance Homosexuality Intersex Non-heterosexual Non-binary gender Queer Queer heterosexuality...
    149 KB (7,296 words) - 12:28, 11 November 2024
  • Wolverine, Cassandra Nova is referred as an Omega-level mutant by the Time Variance Authority. These characters were once termed as Omega-level mutants or...
    17 KB (1,487 words) - 05:47, 2 November 2024