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  2. Superposition principle - Wikipedia

    en.wikipedia.org/wiki/Superposition_principle

    Mode superposition method uses the natural frequencies and mode shapes to characterize the dynamic response of a linear structure. [10] In hydrogeology, the superposition principle is applied to the drawdown of two or more water wells pumping in an ideal aquifer.

  3. Green's function - Wikipedia

    en.wikipedia.org/wiki/Green's_function

    The following table gives an overview of Green's functions of frequently appearing differential operators, where = + +, = +, is the Heaviside step function, () is a Bessel function, () is a modified Bessel function of the first kind, and () is a modified Bessel function of the second kind. [2]

  4. Superposition calculus - Wikipedia

    en.wikipedia.org/wiki/Superposition_calculus

    The superposition calculus is a calculus for reasoning in equational logic. It was developed in the early 1990s and combines concepts from first-order resolution with ordering-based equality handling as developed in the context of (unfailing) Knuth–Bendix completion .

  5. Method of undetermined coefficients - Wikipedia

    en.wikipedia.org/wiki/Method_of_undetermined...

    The method consists of finding the general homogeneous ... using a superposition principle, ... Below is a table of some typical functions and the solution to guess ...

  6. Duhamel's integral - Wikipedia

    en.wikipedia.org/wiki/Duhamel's_integral

    Regarding the arbitrarily varying excitation p(t) as a superposition of a series of impulses: < ()then it is known from the linearity of system that the overall response can also be broken down into the superposition of a series of impulse-responses:

  7. Time–temperature superposition - Wikipedia

    en.wikipedia.org/wiki/Time–temperature...

    The time–temperature superposition principle is a concept in polymer physics and in the physics of glass-forming liquids. [ 1 ] [ 2 ] [ 3 ] This superposition principle is used to determine temperature-dependent mechanical properties of linear viscoelastic materials from known properties at a reference temperature.

  8. Quantum superposition - Wikipedia

    en.wikipedia.org/wiki/Quantum_superposition

    Quantum superposition is a fundamental principle of quantum mechanics that states that linear combinations of solutions to the Schrödinger equation are also solutions of the Schrödinger equation. This follows from the fact that the Schrödinger equation is a linear differential equation in time and position.

  9. Structural alignment - Wikipedia

    en.wikipedia.org/wiki/Structural_alignment

    Often the purpose of seeking a structural superposition is not so much the superposition itself, but an evaluation of the similarity of two structures or a confidence in a remote alignment. [1] [2] [3] A subtle but important distinction from maximal structural superposition is the conversion of an alignment to a meaningful similarity score.