empirical rule

empirical rule

[em′pir·ə·kəl ′rül]
(science and technology)
A rule which is derived from measurements or observations, and is not based on any theory.
References in periodicals archive ?
Without a robust empirical rule with which to draw conclusions, we can only proceed by a thorough investigation of the dynamics in the labor market, and we believe that circumstantial evidence is compelling in its suggestion that at least a portion of the rise in unemployment is more structural than cyclical in nature:
Even so, Kumsa eventually strayed from the faith she had grown up with--influenced by Ethiopia's political situation that was moving from centuries of empirical rule to a communist regime.
The data set acquired should be large enough to allow deriving empirical rules, tendencies and performed the chemical modeling.
The innovation of this study is trying to stitch together those empirical rules with the underlying physics and find some sort of generality," Brodsky said.
Several basic empirical rules are sometimes used to determine if the surge-control system adequately protects the compressor.
He said that an expansion of trading volume leads to a rise in share prices according to empirical rules.
However, Castles does not do full justice to Boyd's insistence on the rule of law and how this brought him into sharp conflict with those Brooke officers whom he characterized as employing "rough and ready empirical rules, called by some the rule of common sense and made up as and when occasion requires.
Many empirical rules and amendatory formulas have been proposed to improve the accuracy of the mechanical property measurement of hard coatings.
Cookbook; Empirical rules can be found that apply most of the time.
Nonetheless, Arrowsmith is now able to produce large numbers of suggestive juxtapositions of Medline titles or records, and it is reasonable to expect further improvement with the accumulation of additional inelegant ad hoc empirical rules with little else to recommend them except that they seem to work.
This example clearly shows that the various empirical rules commonly used in the literature can lead to very large errors for some material systems.

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