Results 31 to 40 of about 1,618,729 (319)
Calibrated estimators in two-stage sampling
Communications in Statistics - Theory and Methods, 2018 We consider the problem of the estimation of the population mean of a study variable by assuming that the population means of an auxiliary variable are known at both stages of sample selection. The design weights at the first and second stages of sample selection are calibrated by optimizing the chi-squared type distance between the design weights and ...
Stephen A. Sedory +2 more
openaire +2 more sources
Two-stage re-estimation adaptive design: a simulation study
Epidemiology, Biostatistics and Public Health, 2013 Background: adaptive clinical trial design has been proposed as a promising new approach to improve the drug discovery process. Among the many options available, adaptive sample size re-estimation is of great interest mainly because of its ability to ...
Francesca Galli, Luigi Mariani
doaj +1 more source
Millimeter-Wave Based Localization Using a Two-Stage Channel Estimation Relying on Few-Bit ADCs
IEEE Open Journal of the Communications Society, 2021 Benefiting from the high resolution in beamspace, millimeter wave (mmwave) communication has been regarded as a high-accuracy localization solution, where the location information is embedded in the channel via angle and time delay, for example.
Kunlun Li +2 more
doaj +1 more source
Position and Orientation Estimation through Millimeter Wave MIMO in 5G Systems [PDF]
, 2017 Millimeter wave signals and large antenna arrays are considered enabling technologies for future 5G networks. While their benefits for achieving high-data rate communications are well-known, their potential advantages for accurate positioning are largely
Destino, Giuseppe +4 more
core +3 more sources
Crop Journal, 2022 Accurate, efficient, and timely yield estimation is critical for crop variety breeding and management optimization. However, the contributions of proximal sensing data characteristics (spectral, temporal, and spatial) to yield estimation have not been ...
Qing Li +10 more
doaj +1 more source
Collective Animal Behavior from Bayesian Estimation and Probability Matching [PDF]
, 2011 Animals living in groups make movement decisions that depend, among other factors, on social interactions with other group members. Our present understanding of social rules in animal collectives is based on empirical fits to observations and we lack ...
A Houston +68 more
core +9 more sources
A Novel Two-Stage Illumination Estimation Framework for Expression Recognition
The Scientific World Journal, 2014 One of the critical issues for facial expression recognition is to eliminate the negative effect caused by variant poses and illuminations. In this paper a two-stage illumination estimation framework is proposed based on three-dimensional representative ...
Zheng Zhang, Guozhi Song, Jigang Wu
doaj +1 more source
Two-Stage Limited-Information Estimation for Structural Equation Models of Round-Robin Variables
StatsWe propose and demonstrate a new two-stage maximum likelihood estimator for parameters of a social relations structural equation model (SR-SEM) using estimated summary statistics (Σ^) as data, as well as uncertainty about Σ^ to obtain robust inferential ...
Terrence D. Jorgensen +2 more
doaj +1 more source
Estimation in Two‐Stage Models with Heteroscedasticity
International Statistical Review, 2006 SummaryA surprising number of important problems can be cast in the framework of estimating a mean and variance using data arising from a two‐stage structure. The first stage is a random sampling of “units” with some quantity of interest associated with the unit.
openaire +3 more sources
The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada
Population Ecology, EarlyView.We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley +1 more source