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  2. Wide area multilateration - Wikipedia

    en.wikipedia.org/wiki/Wide_area_multilateration

    Wide area multilateration (WAM) is a cooperative aircraft surveillance technology based on the same time difference of arrival principle that is used on an airport surface. . WAM is a technique where several ground receiving stations listen to signals transmitted from an aircraft; then the aircraft's location is mathematically calculated -- typically in two dimensions, with the aircraft ...

  3. Weighted-average life - Wikipedia

    en.wikipedia.org/wiki/Weighted-Average_Life

    WAL should not be confused with the following distinct concepts: Bond duration Bond duration is the weighted-average time to receive the discounted present values of all the cash flows (including both principal and interest), while WAL is the weighted-average time to receive simply the principal payments (not including interest, and not discounting).

  4. List of electromagnetism equations - Wikipedia

    en.wikipedia.org/wiki/List_of_electromagnetism...

    Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal nĚ‚, d is the dipole moment between two point charges, the volume density of these is the polarization density P.

  5. Lambert W function - Wikipedia

    en.wikipedia.org/wiki/Lambert_W_function

    The notation convention chosen here (with W 0 and W −1) follows the canonical reference on the Lambert W function by Corless, Gonnet, Hare, Jeffrey and Knuth. [3]The name "product logarithm" can be understood as follows: since the inverse function of f(w) = e w is termed the logarithm, it makes sense to call the inverse "function" of the product we w the "product logarithm".

  6. Useful conversions and formulas for air dispersion modeling

    en.wikipedia.org/wiki/Useful_conversions_and...

    This article presents a set of useful conversions and formulas for air dispersion modeling of atmospheric pollutants and for complying with the various regulations as to how to express the concentrations obtained by such modeling.

  7. Boeing MQ-25 Stingray - Wikipedia

    en.wikipedia.org/wiki/Boeing_MQ-25_Stingray

    MQ-25 deck handling demonstration, 2018. On 30 August 2018, the U.S. Navy announced Boeing as the winner of the competition and awarded an $805 million development contract for four MQ-25A aircraft to be completed by August 2024. [1] An additional three test MQ-25As were ordered on 2 April 2020 for a current total order of seven. [16]

  8. Academic grading in Australia - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_Australia

    Some other universities, such as the University of Melbourne, University of New South Wales, University of Sydney, and University of Wollongong [68] use a Weighted Average Mark (WAM) for the same purpose as a GPA. The WAM is based on the raw percentage grades, or marks, achieved by the student, rather than grade points such as High Distinction ...

  9. Hudson's equation - Wikipedia

    en.wikipedia.org/wiki/Hudson's_equation

    Hudson's equation, also known as Hudson formula, is an equation used by coastal engineers to calculate the minimum size of riprap (armourstone) required to provide satisfactory stability characteristics for rubble structures such as breakwaters under attack from storm wave conditions.