Now showing items 1-10 of 4998
The reversed-axis method to estimate precision in standard additions analysis
The standard additions (SA) method is one of the most important calibration strategies in quantitative chemical analysis. It is a powerful tool to minimize matrix effects and enable precise and accurate determinations. On ...
Técnicas geoestatísticas aplicadas ao mapeamento de variáveis limnológicas e quantificação da incerteza associada às estimativas
Aim: This study aimed to map the concentrations of limnological variables in a reservoir employing semivariogram geostatistical techniques and Kriging estimates for unsampled locations, as well as the uncertainty calculation ...
Análise do desempenho de gráficos de controle X-Bar considerando diferentes estimadores do desvio padrão
(Universidade Federal de São CarlosUFSCarPrograma de Pós-graduação em Engenharia de ProduçãoCâmpus São Carlos, 2018-02-16)
The reference works about control charts consider the statistical parameters as known to calculate the control limits. However, in the last decades, the literature about SPC (Statistical Process Control) has indicated a ...
INEQUALITIES INVOLVING THE MEAN AND THE STANDARD DEVIATION OF NONNEGATIVE REAL NUMBERS
(GORDON AND BREACH SCIENCE PUBLISHERS, 2006)
Adaptive control charts for attributes
We develop a general model for adaptive c, np, u and p control charts in which one, two or three design parameters (sample size, sampling interval and control limit width) switch between two values, according to the most ...
The effects of auditory stimulation with music on heart rate variability in healthy women
(Universidade de São Paulo (USP), Faculdade de Medicina, 2013-07-01)
OBJECTIVES: There are no data in the literature with regard to the acute effects of different styles of music on the geometric indices of heart rate variability. In this study, we evaluated the acute effects of relaxant ...
Mean, median, and standard deviation for random values
(Wolfram Demonstrations freeware using MathematicaPlayer, 2016)