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  2. Quantities of information - Wikipedia

    en.wikipedia.org/wiki/Quantities_of_information

    That can be derived using this definition by considering a compound message & providing information regarding the values of two random variables M and N using a message which is the concatenation of the elementary messages m and n, each of whose information content are given by ⁡ and ⁡ respectively.

  3. Uncertainty quantification - Wikipedia

    en.wikipedia.org/wiki/Uncertainty_quantification

    Uncertainty quantification (UQ) is the science of quantitative characterization and estimation of uncertainties in both computational and real world applications. It tries to determine how likely certain outcomes are if some aspects of the system are not exactly known.

  4. Propagation of uncertainty - Wikipedia

    en.wikipedia.org/wiki/Propagation_of_uncertainty

    Any non-linear differentiable function, (,), of two variables, and , can be expanded as + +. If we take the variance on both sides and use the formula [11] for the variance of a linear combination of variables ⁡ (+) = ⁡ + ⁡ + ⁡ (,), then we obtain | | + | | +, where is the standard deviation of the function , is the standard deviation of , is the standard deviation of and = is the ...

  5. Existential quantification - Wikipedia

    en.wikipedia.org/wiki/Existential_quantification

    Consider the formal sentence . For some natural number , =.. This is a single statement using existential quantification. It is roughly analogous to the informal sentence "Either =, or =, or =, or... and so on," but more precise, because it doesn't need us to infer the meaning of the phrase "and so on."

  6. Burst error-correcting code - Wikipedia

    en.wikipedia.org/wiki/Burst_error-correcting_code

    We are allowed to do so, since Fire Codes operate on . By our assumption, v ( x ) {\displaystyle v(x)} is a valid codeword, and thus, must be a multiple of g ( x ) {\displaystyle g(x)} . As mentioned earlier, since the factors of g ( x ) {\displaystyle g(x)} are relatively prime, v ( x ) {\displaystyle v(x)} has to be divisible by x 2 ℓ − 1 ...

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    mail.aol.com

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  8. Peak signal-to-noise ratio - Wikipedia

    en.wikipedia.org/wiki/Peak_signal-to-noise_ratio

    For color images with three RGB values per pixel, the definition of PSNR is the same except that the MSE is the sum over all squared value differences (now for each color, i.e. three times as many differences as in a monochrome image) divided by image size and by three.

  9. Internet forum - Wikipedia

    en.wikipedia.org/wiki/Internet_forum

    An Internet forum, or message board, is an online discussion site where people can hold conversations in the form of posted messages. [1] They differ from chat rooms in that messages are often longer than one line of text, and are at least temporarily archived. Also, depending on the access level of a user or the forum set-up, a posted message ...