power law

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Noun1.power law - (psychophysics) the concept that the magnitude of a subjective sensation increases proportional to a power of the stimulus intensity
law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
psychophysics - the branch of psychology concerned with quantitative relations between physical stimuli and their psychological effects
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References in periodicals archive ?
The Power Law describes how so-called "critical systems" like those that produce earthquakes and forest fires are completely undiscriminating about the scale of the event.
According to Media report, the US Treasury Department is considering ways to restrict sensitive Chinese investment in the United States by invoking an emergency power law and declaring some security review reforms for corporate acquisitions, Xinhua reported.
Now, we assume the power law form of scale factor; that is, a = [a.sub.0][t.sup.n], where n and [a.sub.0] appear as constant parameters.
The P(t) and [psi](t) in bent tube and in hemisphere are reduced by the factor 1/2 and 1/4, respectively, which makes the comparison in Figure 2 clear without altering the power law. We take the values of power from the data of P(t) because [psi](t) has more violent fluctuations.
dispersion) and they observed that the statistical distribution of these variations follows a power law taking the following form:
Probabilistic distribution functions such as the Pareto power law and exponential functions are more appropriate than the traditional functions in interpreting these extreme/rare events.
where [eta] is the viscosity, [??] is the one component shear rate (the absolute value brackets are used because viscosity is positive definite), and n is the power law constant.
The most common type of Non-Newtonian power law behavior is shear thickening fluid (n > 1), where the viscosity appears to increase when the shear rate increases [14].
The following generalized power law can be derived from the Hencky total deformation theory [13]:
The data also demonstrated that this relationship between quantity and quality is a power law, which matched well with the predictions of our model.