[adaptation] Preconditioning occurs when an animal is exposed to a stressor or stimulus in order to prepare it for a later encounter with a similar stressor or stimulus. For example, in vaccinations, a human is exposed to an artificially weakened virus in order to stimulate the body`s immune system to produce antibodies that fight the virus...
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http://en.wikipedia.org/wiki/Preconditioning_(adaptation)
A generalization of scaling that modifies the hessian so as to improve convergence properties. In the case of quadratic programming, this typically means multiplying the quadratic form matrix, Q, by a preconditioner, P, so that the condition number of PQ is as close to 1 as possible. There are many variations, including splitting a matrix, Q = P -....
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http://glossary.computing.society.informs.org/index.php?page=P.html
the treatment of a specimen with the object of removing or partly counteracting the effect of its previous history with respect, principally, to the temperature and humidity to which it has been exposed NOTE 1 - The preconditioning is sometimes known as normalizing. NOTE 2 - Preconditioning usually precedes conditioning of a specimen. When the comb...
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=212-02-02
preconditioning The creation of a condition, or state, in which a stimulus applied later will incur a certain response.
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http://www.wordinfo.info/words/index/info/view_unit/1744/5
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