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then uses an event tree to develop a set of compromise paths. Probability models are developed for each of the compromise … insider and visitor intelligence collectors has been developed based on an event-tree analysis of the intelligence collection … paths that user parameters based on expert judgment or historical data on security violations. The resulting probability …
Persistent link: https://www.econbiz.de/10009435395
Environmental radiological assessments rely heavily on the use of mathematical models. The predictions of these models are inherently uncertain because these models are inexact representations of real systems. The major sources of this uncertainty are related to biases in model formulation and...
Persistent link: https://www.econbiz.de/10009435418
A previous report explored and discussed statistical methods and procedures that may be applied to validate the survivability of a complex system of systems that cannot be tested as an entity. It described a methodology where Monte Carlo simulation was used to develop the system survivability...
Persistent link: https://www.econbiz.de/10009435451
The increasing use of results from probabilistic risk assessments in the decision-making process makes it ever more important to eliminate simplifications in probabilistic models that might lead to conservative results. One area in which conservative simplifications are often made is modeling...
Persistent link: https://www.econbiz.de/10009435480
This document, written for the US Department of Energy, discusses current information and the need for future research on estimating the impacts on wages and property values that could result from people's perceptions of the risks associated with noxious facilities. Psychometric studies indicate...
Persistent link: https://www.econbiz.de/10009435650
probability, with confidence interval, of the time that a prescribed degradation level is exceeded is shown to be practical, as … demonstrated in the analysis of irradiated fuel cladding. The methodology for the estimation of the probability is predicated on …
Persistent link: https://www.econbiz.de/10009435687
Concentrations of environmental pollutants tend to follow positively skewed frequency distributions. Two such density functions are the gamma and lognormal. Minimum variance unbiased estimators of the expected value for both densities are available. The small sample statistical properties of...
Persistent link: https://www.econbiz.de/10009435692
and prediction uncertainty with different probability structures. Several examples are presented utilizing this metric. We …
Persistent link: https://www.econbiz.de/10009435763
probability of individual component failure is sometimes interpreted as the percentage of components likely to fail, this … multiplying by the probability of individual component failure. However, more complicated cost models require a break down of how … many components are likely to fail. This break down enables the calculation of costs associated with various probability of …
Persistent link: https://www.econbiz.de/10009435781
uncertainty. The significant innovation of this framework is that it allows for the allocation of a probability mass to sets or … intervals. Dempster-Shafer theory does not require an assumption regarding the probability of the individual constituents of the …
Persistent link: https://www.econbiz.de/10009435897