Now showing items 21-30 of 28591
ROBUST IDENTIFICATION OF CONTINUOUS-TIME SYSTEMS FROM SAMPLED DATA
Whilst most physical systems occur naturally in continuous time, it is necessary to deal with sampled data for identification purposes. In principle, one can derive an exact sampled data model for any given linear system ...
Effects of sampling completeness on the structure of plant-pollinator networks
Plant-animal interaction networks provide important information on community organization. One of the most critical assumptions of network analysis is that the observed interaction patterns constitute an adequate sample ...
Sampling precision and variability of tree species abundance ranks in a semideciduous Atlantic forest fragment
(Akademiai Kiado RtBudapestHungria, 2011)
Missing data mechanisms and their implications on the analysis of categorical data
We review some issues related to the implications of different missing data mechanisms on statistical inference for contingency tables and consider simulation studies to compare the results obtained under such models to ...
Inference and estimation in small sample dynamic panel data models
(Universidad Torcuato Di Tella. Escuela de Negocios. Centro de Investigaciones en Finanzas (CIF), 2002-12-27)
We study the finite sample properties of the most important methods of estimation of dynamic panel data models in a special class of small samples: a two-sided small sample (i.e., a sample in which the time dimension is ...
Extraction of building roof planes with stratified random sample consensus
This paper describes a consensus-set estimation for building roof-plane detection using a stratified random sample consensus (sRANSAC) algorithm applied to point clouds acquired by laser scanning systems. The main idea is ...
The Endothelial Sample Size Analysis in Corneal Specular Microscopy Clinical Examinations
(LIPPINCOTT WILLIAMS & WILKINSPHILADELPHIA, 2012)
Purpose: To evaluate endothelial cell sample size and statistical error in corneal specular microscopy (CSM) examinations. Methods: One hundred twenty examinations were conducted with 4 types of corneal specular microscopes: ...
Preliminary results concerning the VSS X- chart with unknow in-control parameters
The VSS X- chart is known to perform better than the traditional X- control chart in detecting small to moderate mean shifts in the process. Many researchers have used this chart in order to detect a process mean shift ...
Comparative studies of the sample decomposition of green and roasted coffee for determination of nutrients and data exploratory analysis
The contents of some nutrients in 35 Brazilian green and roasted coffee samples were determined by flame atomic absorption spectrometry (Ca, Mg, Fe, Cu, Mn, and Zn), flame atomic emission photometry (Na and K) and Kjeldahl ...