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非正规部分因子设计的最小 $G_2$ 混杂准则AI 解读

Deng and Tang proposed generalized resolution and minimum aberration criteria for comparing and assessing nonregular fractional factorials, of which Plackett–Burman designs are special cases.A relaxed variant of generalized aberration is proposed and studied in this paper.We show that a best design according to this criterion minimizes the contamination of nonnegligible interactions on the estimation of main effects in the order of importance given by the hierarchical…

农业调查中利用多年轮换抽样设计进行估计AI 解读

In the annual June Enumerative Surveys (JES) of the U.S. Department of Agriculture (USDA), the area frame sampling involves multiyear rotation designs with 20% replacement of sample units each year. Currently, USDA uses the latest year sample data almost exclusively in its estimation procedure. We propose that the multiyear sample survey data should be used for estimation of crop acreages and livestock. We develop a multiyear estimation method based on an analysis of…

农业调查中利用多年轮换抽样设计进行估计AI 解读

In the annual June Enumerative Surveys (JES) of the U.S. Department of Agriculture (USDA), the area frame sampling involves multiyear rotation designs with 20% replacement of sample units each year. Currently, USDA uses the latest year sample data almost exclusively in its estimation procedure. We propose that the multiyear sample survey data should be used for estimation of crop acreages and livestock. We develop a multiyear estimation method based on an analysis of…

有限总体均值的渐近设计无偏估计量AI 解读

Certain regression-type estimators of a finite population mean are examined for their asymptotic design properties. A sufficient condition that implies the design-consistency or asymptotic design-unbiasedness is discussed for a general regression estimator. The leading term of its asymptotic bias is explicitly derived when this condition holds as well as when it does not hold.

有限总体均值估计量的渐近设计无偏性AI 解读

Certain regression-type estimators of a finite population mean are examined for their asymptotic design properties. A sufficient condition that implies the design-consistency or asymptotic design-unbiasedness is discussed for a general regression estimator. The leading term of its asymptotic bias is explicitly derived when this condition holds as well as when it does not hold.

回归估计量的方差估计AI 解读

The regression estimator and the ratio estimator are commonly used in survey practice. In the past more attention has been given to the ratio estimator because of its computational ease and applicability for general sampling designs. The ratio estimator is appropriate for populations whose regression line passes close to the origin. If the intercept of the regression line is significantly nonzero, however, it is much less efficient than the regression estimator (Deng 1984).…

调查抽样中回归估计量的方差估计AI 解读

The regression estimator and the ratio estimator are commonly used in survey practice. In the past more attention has been given to the ratio estimator because of its computational ease and applicability for general sampling designs. The ratio estimator is appropriate for populations whose regression line passes close to the origin. If the intercept of the regression line is significantly nonzero, however, it is much less efficient than the regression estimator (Deng 1984).…