Results 211 to 220 of about 103,842 (257)

Calculation of the expanded uncertainty for large uncertainties using the lognormal distribution

Accreditation and Quality Assurance, 2020
For large uncertainties, calculating the expanded uncertainty using a normal distribution for the values of the measurand can lead to negative values for the lower limit of the expanded uncertainty and unrealistic large values for the upper limit, when the relative uncertainty is constant over wide concentration range.
Alex Williams
exaly   +2 more sources

Benchmark Test Distributions for Expanded Uncertainty Evaluation Algorithms

IEEE Transactions on Instrumentation and Measurement, 2016
Expanded uncertainty estimation is normally required for mission-critical applications, e.g., those involving health and safety. It helps to get a distribution range of the required confidence level for the uncertainty evaluation of a system. There are a number of available techniques to estimate the expanded uncertainty. However, there is currently no
Melanie Ooi   +2 more
exaly   +2 more sources

Rounding the expanded uncertainty

Accreditation and Quality Assurance, 2019
When reporting expanded uncertainty, rounding the number of significant figures can affect the associated level of confidence. A simple numerical method is used to measure the level of confidence obtained after different rounding methods have been applied. This also offers some insight into the meaning of level of confidence.
Blair Hall
exaly   +2 more sources

Performance comparison between expanded uncertainty evaluation algorithms

2015 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2015
The use of normal approximation to estimate expanded uncertainty has been very widespread; yet this is one of the practices that is being criticized by various quarters for lack of rigor and potentially misleading. Monte Carlo method is probably the only method trusted to generate reliable expanded uncertainty.
Serge Demidenko   +2 more
exaly   +2 more sources

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