Quadratic estimations in mixed linear models
In the paper four types of estimations of the linear function of the variance components are presented for the mixed linear model with expectation and covariance matrix .
Robust estimations in classical regression models versus robust estimations in fuzzy regression models
In this paper are presented two robust estimators of unknown fuzzy parameters in the fuzzy regression model and investigated the relationship between these robust estimators in the classical regression model and in the fuzzy regression model.
Minimum variance quadratic unbiased estimation of variance components
Estimations of covariance components in mixed linear models
An estimation of the linear function of elements of unknown matrices in the covariance components model is presented.
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