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  2. Comparison of raster graphics editors - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_raster...

    Free MIT: F-Spot: Image viewer and organizer for GNOME: Ettore Perazzoli 2005: 0.8.2 [5] [6] [7] 2010-12-19 Free MIT: G'MIC: Free command line software for 2D or 3D image processing and visualization David Tschumperlé October 2008: 3.5.2 [8] 2025-01-29 Free CECILL-2.1 or CECILL-C: GIMP: Free image editor and graphics creator Spencer Kimball ...

  3. Mergers and acquisitions - Wikipedia

    en.wikipedia.org/wiki/Mergers_and_acquisitions

    Approximately 23 percent of the 416 M&A deals announced in the U.S. M&A market in 2014 involved non-U.S. acquirers. For 2016, market uncertainties, including Brexit and the potential reform from a U.S. presidential election, contributed to cross-border M&A activity lagging roughly 20% behind 2015 activity.

  4. Rice distribution - Wikipedia

    en.wikipedia.org/wiki/Rice_distribution

    The probability density function is (,) = ⁡ ((+)) (),where I 0 (z) is the modified Bessel function of the first kind with order zero.. In the context of Rician fading, the distribution is often also rewritten using the Shape Parameter =, defined as the ratio of the power contributions by line-of-sight path to the remaining multipaths, and the Scale parameter = +, defined as the total power ...

  5. Autoregressive moving-average model - Wikipedia

    en.wikipedia.org/wiki/Autoregressive_moving...

    The notation AR(p) refers to the autoregressive model of order p.The AR(p) model is written as = = + where , …, are parameters and the random variable is white noise, usually independent and identically distributed (i.i.d.) normal random variables.

  6. Multitaper - Wikipedia

    en.wikipedia.org/wiki/Multitaper

    The multitaper method overcomes some of the limitations of non-parametric Fourier analysis.When applying the Fourier transform to extract spectral information from a signal, we assume that each Fourier coefficient is a reliable representation of the amplitude and relative phase of the corresponding component frequency.

  7. Signal-to-noise ratio - Wikipedia

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

    In physics, the average power of an AC signal is defined as the average value of voltage times current; for resistive (non-reactive) circuits, where voltage and current are in phase, this is equivalent to the product of the rms voltage and current: =

  8. Landau theory - Wikipedia

    en.wikipedia.org/wiki/Landau_theory

    Landau theory (also known as Ginzburg–Landau theory, despite the confusing name [1]) in physics is a theory that Lev Landau introduced in an attempt to formulate a general theory of continuous (i.e., second-order) phase transitions. [2]

  9. Piezoelectric sensor - Wikipedia

    en.wikipedia.org/wiki/Piezoelectric_sensor

    A force applied along a neutral axis (y) displaces charges along the (x) direction, perpendicular to the line of force. The amount of charge depends on the geometrical dimensions of the respective piezoelectric element.