Results 251 to 260 of about 14,505 (295)

An approximate epistemic uncertainty analysis approach in the presence of epistemic and aleatory uncertainties

Reliability Engineering and System Safety, 2002
Abstract Epistemic uncertainty analysis is an essential feature of any model application subject to ‘state of knowledge’ uncertainties. Such analysis is usually carried out on the basis of a Monte Carlo simulation sampling the epistemic variables and performing the corresponding model runs.
Martina Kloos
exaly   +2 more sources

Reliability analysis under epistemic uncertainty

Reliability Engineering and System Safety, 2016
Abstract This paper proposes a probabilistic framework to include both aleatory and epistemic uncertainty within model-based reliability estimation of engineering systems for individual limit states. Epistemic uncertainty is considered due to both data and model sources.
Saideep Nannapaneni, Sankaran Mahadevan   +1 more
exaly   +2 more sources

Epistemic uncertainty in Bayesian predictive probabilities

Journal of Biopharmaceutical Statistics, 2023
Bayesian predictive probabilities have become a ubiquitous tool for design and monitoring of clinical trials. The typical procedure is to average predictive probabilities over the prior or posterior distributions. In this paper, we highlight the limitations of relying solely on averaging, and propose the reporting of intervals or quantiles for the ...
Charles C. Liu, Ron Xiaolong Yu
openaire   +2 more sources

Modelling epistemic uncertainty in ir evaluation

Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, 2007
Modern information retrieval (IR) test collections violate the completeness assumption of the Cranfield paradigm. In order to maximise the available resources, only a sample of documents (i.e. the pool) are judged for relevance by a human assessor(s).
Yakici, M., Baillie, M., Ruthven, I., Crestani, F.   +3 more
openaire   +2 more sources

UNCERTAINTY AND EPISTEMIC CURIOSITY

British Journal of Psychology, 1962
Two experiments were concerned with the effects of uncertainty on epistemic curiosity. Quotations, each coupled with the names of possible authors and with a distribution of fictitious experts' guesses regarding the true author, formed the experimental material.
openaire   +2 more sources

Quantification of margins and uncertainties: Alternative representations of epistemic uncertainty

Reliability Engineering & System Safety, 2011
Abstract In 2001, the National Nuclear Security Administration of the U.S. Department of Energy in conjunction with the national security laboratories (i.e., Los Alamos National Laboratory, Lawrence Livermore National Laboratory and Sandia National Laboratories) initiated development of a process designated Quantification of Margins and Uncertainties
Jon C. Helton, Jay D. Johnson
openaire   +1 more source

Epistemic Uncertainty Modeling for Vessel Segmentation

2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019
X-ray angiograms are currently the gold-standard in percutaneous guidance during cardiovascular interventions. However, due to lack of contrast, to overlapping artifacts and to the rapid dilution of the contrast agent, they remain difficult to analyze either by cardiologists, or automatically by computers.
Rémi Martin, Joaquim Miró, Luc Duong
openaire   +2 more sources

Model validation under epistemic uncertainty

Reliability Engineering & System Safety, 2011
Abstract This paper develops a methodology to assess the validity of computational models when some quantities may be affected by epistemic uncertainty. Three types of epistemic uncertainty regarding input random variables – interval data, sparse point data, and probability distributions with parameter uncertainty – are considered.
Shankar Sankararaman, Sankaran Mahadevan
openaire   +1 more source