Exponential integral — is a mathematical function of a single argument which has no established notation.DefinitionsFor real values of x , the exponential integral Ei( x ) can be defined as : mbox{Ei}(x)=int { infty}^xfrac{e^t}t,dt., The definition above can be used… … Wikipedia
Exponential smoothing — is a technique that can be applied to time series data, either to produce smoothed data for presentation, or to make forecasts. The time series data themselves are a sequence of observations. The observed phenomenon may be an essentially random… … Wikipedia
error — errorless, adj. errorlessly, adv. /er euhr/, n. 1. a deviation from accuracy or correctness; a mistake, as in action or speech: His speech contained several factual errors. 2. belief in something untrue; the holding of mistaken opinions. 3. the… … Universalium
Exponential power distribution — The exponential power distribution, also known as the generalized error distribution, is a probability distribution that takes a scale parameter a and exponent (or shape parameter) b . The probability density is: p(x) , dx = {1 over 2 a… … Wikipedia
List of exponential topics — This is a list of exponential topics, by Wikipedia page. See also list of logarithm topics. *Accelerating change *Artin Hasse exponential *Bacterial growth *Baker Campbell Hausdorff formula *Cell growth *Barometric formula *Basic infection number … Wikipedia
Concatenated error correction code — In coding theory, concatenated codes form a class of error correcting codes that are derived by combining an inner code and an outer code. They were conceived in 1966 by Dave Forney as a solution to the problem of finding a code that has both… … Wikipedia
Standard error (statistics) — For a value that is sampled with an unbiased normally distributed error, the above depicts the proportion of samples that would fall between 0, 1, 2, and 3 standard deviations above and below the actual value. The standard error is the standard… … Wikipedia
Characterizations of the exponential function — In mathematics, the exponential function can be characterized in many ways. The following characterizations (definitions) are most common. This article discusses why each characterization makes sense, and why the characterizations are independent … Wikipedia
Mean absolute scaled error — In statistics, the mean absolute scaled error (MASE) is a measure of the accuracy of forecasts . It was proposed in 2006 by Australian statistician Rob Hyndman, who described it as a generally applicable measurement of forecast accuracy without… … Wikipedia
List of integrals of exponential functions — The following is a list of integrals (antiderivative functions) of exponential functions. For a complete list of Integral functions, please see the list of integrals. Note that x can be substituted for u, or any other variable, so long as the… … Wikipedia