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  2. Bode plot - Wikipedia

    en.wikipedia.org/wiki/Bode_plot

    Figure 1B: Low-pass filter (1st-order, one-pole) Bode magnitude plot (top) and Bode phase plot (bottom). The red data curve is approximated by the straight black line. In electrical engineering and control theory, a Bode plot (/ ˈ b oʊ d i / BOH-dee) is a graph of the frequency response of a system.

  3. Lambert azimuthal equal-area projection - Wikipedia

    en.wikipedia.org/wiki/Lambert_azimuthal_equal...

    As defined in the preceding section, the Lambert azimuthal projection of the unit sphere is undefined at (0, 0, 1). It sends the rest of the sphere to the open disk of radius 2 centered at the origin (0, 0) in the plane. It sends the point (0, 0, −1) to (0, 0), the equator z = 0 to the circle of radius √ 2 centered at (0, 0), and the lower ...

  4. Method of image charges - Wikipedia

    en.wikipedia.org/wiki/Method_of_image_charges

    Diagram illustrating the image method for Laplace's equation for a sphere of radius R. The green point is a charge q lying inside the sphere at a distance p from the origin, the red point is the image of that point, having charge −qR/p, lying outside the sphere at a distance of R 2 /p from the origin. The potential produced by the two charges ...

  5. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    The length of the line would then be scaled to P 1 assuming the Smith chart radius to be unity. For example, if the actual radius measured from the paper was 100 mm, the length OP 1 would be 63 mm. The following table gives some similar examples of points which are plotted on the Z Smith chart. For each, the reflection coefficient is given in ...

  6. Stereographic projection - Wikipedia

    en.wikipedia.org/wiki/Stereographic_projection

    Stereographic projection of the unit sphere from the north pole onto the plane z = 0, shown here in cross section. The unit sphere S 2 in three-dimensional space R 3 is the set of points (x, y, z) such that x 2 + y 2 + z 2 = 1. Let N = (0, 0, 1) be the "north pole", and let M be the rest of the sphere.

  7. Nyquist stability criterion - Wikipedia

    en.wikipedia.org/wiki/Nyquist_stability_criterion

    The Nyquist plot for () = + + with s = jω.. In control theory and stability theory, the Nyquist stability criterion or Strecker–Nyquist stability criterion, independently discovered by the German electrical engineer Felix Strecker [] at Siemens in 1930 [1] [2] [3] and the Swedish-American electrical engineer Harry Nyquist at Bell Telephone Laboratories in 1932, [4] is a graphical technique ...

  8. What does the Spirit Airlines bankruptcy mean for airfares ...

    www.aol.com/news/does-spirit-airlines-bankruptcy...

    Spirit Airlines brought in roughly $1.3 billion in revenue over a recent three-month stretch, which marked a 10% decline compared to the same period a year ago, according to an earnings release in ...

  9. List of centroids - Wikipedia

    en.wikipedia.org/wiki/List_of_centroids

    h = the height of the semi-ellipsoid from the base cicle's center to the edge Solid paraboloid of revolution around z-axis: a = the radius of the base circle h = the height of the paboloid from the base cicle's center to the edge