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  2. Scale analysis (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Scale_analysis_(mathematics)

    Scale analysis (or order-of-magnitude analysis) is a powerful tool used in the mathematical sciences for the simplification of equations with many terms. First the approximate magnitude of individual terms in the equations is determined.

  3. Vector algebra relations - Wikipedia

    en.wikipedia.org/wiki/Vector_algebra_relations

    The following are important identities in vector algebra.Identities that only involve the magnitude of a vector ‖ ‖ and the dot product (scalar product) of two vectors A·B, apply to vectors in any dimension, while identities that use the cross product (vector product) A×B only apply in three dimensions, since the cross product is only defined there.

  4. Signal magnitude area - Wikipedia

    en.wikipedia.org/wiki/Signal_magnitude_area

    The SMA value of a set of values (or a continuous-time waveform) is the normalized integral of the original values. [1] [2]In the case of a set of n values {,, …,} matching a time length T, the SMA

  5. Magnitude (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Magnitude_(mathematics)

    In mathematics, the magnitude or size of a mathematical object is a property which determines whether the object is larger or smaller than other objects of the same kind. More formally, an object's magnitude is the displayed result of an ordering (or ranking) of the class of objects to which it belongs.

  6. Complex conjugate - Wikipedia

    en.wikipedia.org/wiki/Complex_conjugate

    In mathematics, the complex conjugate of a complex number is the number with an equal real part and an imaginary part equal in magnitude but opposite in sign. That is, if a {\displaystyle a} and b {\displaystyle b} are real numbers, then the complex conjugate of a + b i {\displaystyle a+bi} is a − b i . {\displaystyle a-bi.}

  7. Orders of magnitude (energy) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(energy)

    7.0×10 21 J Thermal energy released by the Toba eruption [201] 7.9×10 21 J: Estimated energy contained in the world's petroleum reserves as of 2010 [213] [222] 9.3×10 21 J: Annual net uptake of thermal energy by the global ocean during 2003-2018 [223] 10 22 1.2×10 22 J Seismic energy of a magnitude 11 earthquake on Earth (M 11) [224] 1.5× ...

  8. Characteristic impedance - Wikipedia

    en.wikipedia.org/wiki/Characteristic_impedance

    This expression extends to DC by letting tend to 0.. A surge of energy on a finite transmission line will see an impedance of prior to any reflections returning; hence surge impedance is an alternative name for characteristic impedance.

  9. Scale invariance - Wikipedia

    en.wikipedia.org/wiki/Scale_invariance

    This variance to mean power law is known in the physics literature as fluctuation scaling, [2] and in the ecology literature as Taylor's law. [ 3 ] Random sequences, governed by the Tweedie distributions and evaluated by the method of expanding bins exhibit a biconditional relationship between the variance to mean power law and power law ...