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power law

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  • Power law — A power law is any polynomial relationship that exhibits the property of scale invariance. The most common power laws relate two variables and have the form:f(x) = ax^k! +o(x^k),where a and k are constants, and o(x^k) is of x. Here, k is… …   Wikipedia

  • power law — noun (psychophysics) the concept that the magnitude of a subjective sensation increases proportional to a power of the stimulus intensity • Syn: ↑Stevens law, ↑Stevens power law • Topics: ↑psychophysics • Hypernyms: ↑law, ↑ …   Useful english dictionary

  • Power law — Una relación power law entre dos escalares cuantitativos x e y es aquella tal que la relación puede ser escrita como donde a (la constante de proporcionalidad) y k (el exponente de la power law) son constantes. Power laws puede ser interpretada… …   Enciclopedia Universal

  • Power law — Dieser Artikel oder Abschnitt bedarf einer Überarbeitung. Näheres ist auf der Diskussionsseite angegeben. Hilf mit, ihn zu verbessern, und entferne anschließend diese Markierung. Die Potenzgesetze (engl. power law) gehören zu den Skalengesetzen… …   Deutsch Wikipedia

  • power law — noun Any of many mathematical relationships in which something is related to something else by an equation of the form f(x) = a.x …   Wiktionary

  • Power-law fluid — NOTOC A Power law fluid is a type of generalized Newtonian fluid for which the shear stress, tau; , is given by : au = K left( frac {partial u} {partial y} ight)^n where: * K is the flow consistency index (SI units Pa bull;s n ), * part; u /… …   Wikipedia

  • Power-law index profile — For optical fibers, a power law index profile is an index of refraction profile characterized by : n(r) = egin{cases} n 1 sqrt{1 2Deltaleft({r over alpha} ight)^g} r le alpha n 1 sqrt{1 2Delta} r ge alpha end{cases}whereDelta = {n 1^2 n 2^2 over …   Wikipedia

  • Power Law of Practice — The Power Law of Practice states that the logarithm of the reaction time for a particular task decreases linearly with the logarithm of the number of practice trials taken. It is an example of the learning curve effect on performance …   Wikipedia

  • Stevens' power law — is a proposed relationship between the magnitude of a physical stimulus and its perceived intensity or strength. It is often considered to supersede the Weber Fechner law on the basis that it describes a wider range of sensations, although… …   Wikipedia

  • Wind profile power law — The wind profile power law is a relationship between the wind speeds at one height, and those at another. The power law is often used in wind power assessments [Elliott, D.L., C.G. Holladay, W.R. Barchet, H.P. Foote, and W.F. Sandusky, 1986,… …   Wikipedia

  • Stevens' power law — noun (psychophysics) the concept that the magnitude of a subjective sensation increases proportional to a power of the stimulus intensity • Syn: ↑Stevens law, ↑power law • Topics: ↑psychophysics • Hypernyms: ↑law, ↑ …   Useful english dictionary

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