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  2. Ternary plot - Wikipedia

    en.wikipedia.org/wiki/Ternary_plot

    A ternary flammability diagram, showing which mixtures of methane, oxygen gas, and inert nitrogen gas will burn. A ternary plot, ternary graph, triangle plot, simplex plot, or Gibbs triangle is a barycentric plot on three variables which sum to a constant. [1]

  3. Flammability diagram - Wikipedia

    en.wikipedia.org/wiki/Flammability_diagram

    Any stoichiometric mixture of methane and oxygen will lie on the straight line between pure nitrogen (and zero percent methane) and 33 percent methane (and 67 percent oxygen) – this is shown as the red stoichiometric line. The upper and lower flammability limits of methane in oxygen are located on the methane axis, as shown.

  4. Three-mirror anastigmat - Wikipedia

    en.wikipedia.org/wiki/Three-mirror_anastigmat

    A Paul design has a parabolic primary with spherical secondary and tertiary mirrors; a Paul–Baker design modifies the secondary slightly to flatten the focal plane. A three-mirror anastigmat is an anastigmat telescope built with three curved mirrors, enabling it to minimize all three main optical aberrations – spherical aberration , coma ...

  5. Phase diagram - Wikipedia

    en.wikipedia.org/wiki/Phase_diagram

    [12] [13] For example, for a single component, a 3D Cartesian coordinate type graph can show temperature (T) on one axis, pressure (p) on a second axis, and specific volume (v) on a third. Such a 3D graph is sometimes called a p–v–T diagram. The equilibrium conditions are shown as curves on a curved surface in 3D with areas for solid ...

  6. Hermann–Mauguin notation - Wikipedia

    en.wikipedia.org/wiki/Hermann–Mauguin_notation

    First position – primary direction – z direction, assigned to the higher-order axis. Second position – symmetrically equivalent secondary directions, which are perpendicular to the z-axis. These can be 2, m, or ⁠ 2 / m ⁠. Third position – symmetrically equivalent tertiary directions, passing between secondary directions ...

  7. Axis–angle representation - Wikipedia

    en.wikipedia.org/wiki/Axis–angle_representation

    The angle θ and axis unit vector e define a rotation, concisely represented by the rotation vector θe.. In mathematics, the axis–angle representation parameterizes a rotation in a three-dimensional Euclidean space by two quantities: a unit vector e indicating the direction of an axis of rotation, and an angle of rotation θ describing the magnitude and sense (e.g., clockwise) of the ...

  8. Helical wheel - Wikipedia

    en.wikipedia.org/wiki/Helical_wheel

    The plot reveals whether hydrophobic amino acids are concentrated on one side of the helix, usually with polar or hydrophilic amino acids on the other. This arrangement is common in alpha helices within globular proteins, where one face of the helix is oriented toward the hydrophobic core and one face is oriented toward the solvent-exposed surface.

  9. Confusion matrix - Wikipedia

    en.wikipedia.org/wiki/Confusion_matrix

    The template for any binary confusion matrix uses the four kinds of results discussed above (true positives, false negatives, false positives, and true negatives) along with the positive and negative classifications.