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  2. Radon transform - Wikipedia

    en.wikipedia.org/wiki/Radon_transform

    Radon transform. Maps f on the (x, y)-domain to Rf on the (α, s)-domain.. In mathematics, the Radon transform is the integral transform which takes a function f defined on the plane to a function Rf defined on the (two-dimensional) space of lines in the plane, whose value at a particular line is equal to the line integral of the function over that line.

  3. Tomographic reconstruction - Wikipedia

    en.wikipedia.org/wiki/Tomographic_reconstruction

    In theory, the inverse Radon transformation would yield the original image. The projection-slice theorem tells us that if we had an infinite number of one-dimensional projections of an object taken at an infinite number of angles, we could perfectly reconstruct the original object, f ( x , y ) {\displaystyle f(x,y)} .

  4. Surface wave inversion - Wikipedia

    en.wikipedia.org/wiki/Surface_wave_inversion

    The fourth is a modified wave-field transform base on frequency decomposition and slant stacking, performed by Xia et al. (2007). [9] The fifth is a high-resolution Linear Radon transformation performed by Luo et al. (2008). [10] In performing a wave-field transformation, a slant stack is done, followed by a Fourier transform. The way in which ...

  5. Tetens equation - Wikipedia

    en.wikipedia.org/wiki/Tetens_equation

    The Tetens equation is an equation to calculate the saturation vapour pressure of water over liquid and ice. It is named after its creator, O. Tetens who was an early German meteorologist. It is named after its creator, O. Tetens who was an early German meteorologist.

  6. Phase diagram - Wikipedia

    en.wikipedia.org/wiki/Phase_diagram

    The pressure on a pressure-temperature diagram (such as the water phase diagram shown above) is the partial pressure of the substance in question. A phase diagram in physical chemistry , engineering , mineralogy , and materials science is a type of chart used to show conditions (pressure, temperature, etc.) at which thermodynamically distinct ...

  7. Energy cascade - Wikipedia

    en.wikipedia.org/wiki/Energy_cascade

    A three dimensional form of the pressure spectrum may be combined with the Young–Laplace equation to show that: [8] G ( k ) ∝ k − 19 / 3 . {\displaystyle G(k)\propto k^{-19/3}.} Experimental observation of this k −19/3 law has been obtained by optical measurements of the surface of turbulent free liquid jets.

  8. Shallow water equations - Wikipedia

    en.wikipedia.org/wiki/Shallow_water_equations

    The pressure gradient term (c) describes how pressure changes with position, and since the pressure is assumed hydrostatic, this is the change in head over position. The friction term (d) accounts for losses in energy due to friction, while the gravity term (e) is the acceleration due to bed slope.

  9. Radon transformation - Wikipedia

    en.wikipedia.org/?title=Radon_transformation&...

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