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  2. Scattering parameters - Wikipedia

    en.wikipedia.org/wiki/Scattering_parameters

    Any 2-port S-parameter may be displayed on a polar diagram using polar co-ordinates. In either graphical format each S-parameter at a particular test frequency is displayed as a dot. If the measurement is a sweep across several frequencies a dot will appear for each.

  3. Stokes parameters - Wikipedia

    en.wikipedia.org/wiki/Stokes_parameters

    The Stokes I, Q, U and V parameters. The Stokes parameters are a set of values that describe the polarization state of electromagnetic radiation.They were defined by George Gabriel Stokes in 1851, [1] [2] as a mathematically convenient alternative to the more common description of incoherent or partially polarized radiation in terms of its total intensity (I), (fractional) degree of ...

  4. Polar diagram (sailing) - Wikipedia

    en.wikipedia.org/wiki/Polar_diagram_(sailing)

    A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom.

  5. Impedance parameters - Wikipedia

    en.wikipedia.org/wiki/Impedance_parameters

    A Z-parameter matrix describes the behaviour of any linear electrical network that can be regarded as a black box with a number of ports.A port in this context is a pair of electrical terminals carrying equal and opposite currents into and out-of the network, and having a particular voltage between them.

  6. Taft equation - Wikipedia

    en.wikipedia.org/wiki/Taft_equation

    In addition to Taft's steric parameter E s, other steric parameters that are independent of kinetic data have been defined. Charton has defined values v that are derived from van der Waals radii . [ 9 ] [ 10 ] Using molecular mechanics , Meyers has defined V a values that are derived from the volume of the portion of the substituent that is ...

  7. Polar diagram - Wikipedia

    en.wikipedia.org/wiki/Polar_diagram

    A polar diagram could refer to: Polar area diagram, a type of pie chart; Radiation pattern, in antenna theory; A diagram based on polar coordinates; Spherical coordinate system, the three-dimensional form of a polar response curve; In sailing, a Polar diagram is a graph that shows a sailing boats potential wind speed over a range of wind and ...

  8. Root locus analysis - Wikipedia

    en.wikipedia.org/wiki/Root_locus_analysis

    Typically, a root locus diagram will indicate the transfer function's pole locations for varying values of the parameter . A root locus plot will be all those points in the s -plane where G ( s ) H ( s ) = − 1 {\\displaystyle G(s)H(s)=-1} for any value of K {\\displaystyle K} .

  9. Fermat's spiral - Wikipedia

    en.wikipedia.org/wiki/Fermat's_spiral

    The representation of the Fermat spiral in polar coordinates (r, φ) is given by the equation = for φ ≥ 0. The parameter is a scaling factor affecting the size of the spiral but not its shape. The two choices of sign give the two branches of the spiral, which meet smoothly at the origin.