nugget effect может кто встречал?

[10-4]

Increasing the nugget effect leads to more equal distribution of weights and makes the estimation procedure become more like a simple averaging (это текст по кригингу)

[Mo]

Nugget effect: a feature of the covariance model where the experimental points defining the model do not appear to intersect at the origin. The nugget model shows constant variance at all ranges, but is often modeled as zero variance at the control point (well location).

Источник: http://www.qgsi.com/Terms.html

[10-4]

Придется написать "наггет-эффект".

[Mo]

во-во. прочитав определение, хотела что-нибудь толковое по-русски предложить, но извилины почему-то распрямились...