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  2. Open-circuit time constant method - Wikipedia

    en.wikipedia.org/wiki/Open-circuit_time_constant...

    Figure 2 illustrates the approximation. The x-axis is the ratio τ 1 / τ 2 on a logarithmic scale. An increase in this variable means the higher pole is further above the corner frequency. The y-axis is the ratio of the OCTC (open-circuit time constant) estimate to the true time constant.

  3. Eureqa - Wikipedia

    en.wikipedia.org/wiki/Eureqa

    In November 2009 the program was made available to download as freeware. [4] Lipson described the tool's benefit as dealing with fields that are overwhelmed with data but lack theory to explain it. [5] In the October 2011 edition of "Physical Biology", Lipson described a yeast experiment that predicted seven known equations. [6]

  4. Cutoff frequency - Wikipedia

    en.wikipedia.org/wiki/Cutoff_frequency

    As a voltage ratio this is a fall to / of the passband voltage. [1] Other ratios besides the 3 dB point may also be relevant, for example see § Chebyshev filters below. Far from the cutoff frequency in the transition band, the rate of increase of attenuation ( roll-off ) with logarithm of frequency is asymptotic to a constant.

  5. Alpha cutoff frequency - Wikipedia

    en.wikipedia.org/wiki/Alpha_cutoff_frequency

    Alpha cutoff frequency, or is the frequency at which the common base DC current gain drops to 0.707 of its low frequency value. The common base DC current gain is the ratio of a transistor's collector current to the transistor's emitter current , or α = i C i E {\displaystyle \alpha ={\frac {i_{C}}{i_{E}}}} .

  6. Formula editor - Wikipedia

    en.wikipedia.org/wiki/Formula_editor

    A formula editor is a computer program that is used to typeset mathematical formulas and mathematical expressions. Formula editors typically serve two purposes: They allow word processing and publication of technical content either for print publication, or to generate raster images for web pages or screen presentations.

  7. Spatial cutoff frequency - Wikipedia

    en.wikipedia.org/wiki/Spatial_cutoff_frequency

    where is the wavelength expressed in millimeters and F # is the lens' focal ratio. As an example, a telescope having an f /6 objective and imaging at 0.55 micrometers has a spatial cutoff frequency of 303 cycles/millimeter. High-resolution black-and-white film is capable of resolving details on the film as small as 3 micrometers or smaller ...

  8. Structural cut-off - Wikipedia

    en.wikipedia.org/wiki/Structural_cut-off

    The structural cut-off is a concept in network science which imposes a degree cut-off in the degree distribution of a finite size network due to structural limitations (such as the simple graph property). Networks with vertices with degree higher than the structural cut-off will display structural disassortativity.

  9. TableCurve 2D - Wikipedia

    en.wikipedia.org/wiki/TableCurve_2D

    Once the user has selected the best fit equation, they can output high-quality function and test programming codes or generate comprehensive reports and publication quality graphs. TableCurve 2D was originally developed by Ron Brown of AISN Software. The first version of TableCurve 2D was released in 1989. The first version was a DOS product.