Results 21 to 30 of about 421,329 (326)
High-redshift cosmography: auxiliary variables versus Padé polynomials [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT Cosmography becomes non-predictive when cosmic data span beyond the redshift limit z ≃ 1. This leads to a strong convergence issue that jeopardizes its viability. In this work, we critically compare the two main solutions of the convergence problem, i.e.
O Luongo, R D’Agostino, S Capozziello
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Membrane geometry with auxiliary variables and quadratic constraints [PDF]
, 2004 Consider a surface described by a Hamiltonian which depends only on the metric and extrinsic curvature induced on the surface. The metric and the curvature, along with the basis vectors which connect them to the embedding functions defining the surface ...
Canham P +21 more
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Improved Mixed Estimator Using Two Auxiliary Variables For Full Extreme Maximum And Minimum Values In Single Phase Sampling [PDF]
المجلة العراقية للعلوم الاحصائيةThe use of multiple auxiliary variables has been established to improve precision in the estimators of ratio, regression and product respectively. However, the presence of extreme values in the distribution could annul such efficiency Olatayo et al ...
Timothy O. Olatayo +2 more
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A chain ratio exponential type estimator in two-phase sampling using auxiliary information
Statistica, 2014 This paper advocates the problem of estimating the population mean of the study variable y using the information on two auxiliary variables x and z. We have suggested the family of chain ratio exponential type estimators in two-phase (or double) sampling.
Rohini Yadav +3 more
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Efficient estimation combining exponential and ln functions under two phase sampling
AIMS Mathematics, 2020 In this study, we propose the combination of exponential and ln ratio type estimator to estimate the mean of Y (Study Variable) by incorporating two auxiliary variables in two phase sampling scheme.
Yasir Hassan +3 more
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Defining and Estimating Intervention Effects for Groups that will Develop an Auxiliary Outcome [PDF]
, 2007 It has recently become popular to define treatment effects for subsets of the target population characterized by variables not observable at the time a treatment decision is made.
Hsu, Chi-Yuan +2 more
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Estimation of the finite population covariance using calibration
Nonlinear Analysis, 2010 Estimators of the finite population covariance with several systems of weights are considered. New calibrated estimators of the finite population covariance (variance) are derived, using two and three weighting systems that are defined by various ...
A. Plikusas, D. Pumputis
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On Lossless Coding With Coded Side Information [PDF]
, 2009 This paper considers the problem, first introduced by Ahlswede and Korner in 1975, of lossless source coding with coded side information. Specifically, let X and Y be two random variables such that X is desired losslessly at the decoder while Y serves as
Effros, Michelle, Marco, Daniel
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, 2017 Auxiliary variables are often needed for verifying that an implementation is correct with respect to a higher-level specification. They augment the formal description of the implementation without changing its semantics–that is, the set of behaviors that it describes.
Lamport, Leslie, Merz, Stephan
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Multiple Auxiliary Variables in Nonresponse Adjustment
Sociological Methods & Research, 2011 Prior work has shown that effective survey nonresponse adjustment variables should be highly correlated with both the propensity to respond to a survey and the survey variables of interest. In practice, propensity models are often used for nonresponse adjustment with multiple auxiliary variables as predictors.
Kreuter, Frauke, Olson, Kristen
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