Shohreh Mirzaei Yeganeh

United Nations Organization · Department of Field Support

Confidence regions are usually based on exact data. However, continuous data are always more or less non-precise, also called fuzzy. For fuzzy data the concept of confidence regions has to be generalized. This is possible and the resulting confidence regions are fuzzy subsets of the parameter space. The construction is explained for classical stati...

CIP index is a composite measure of the competitive industrial performance of countries based on eight indicators reflecting their capacity to produce and export, technological deepening and upgrading and impact on global industrial production. CIP index is based on the normalization procedure of individual indices and their aggregation based on gi...

Sub-annual macroeconomic statistics today are a key tool for economic policymaking, business cycle analysis and forecasting. However, these statistics are often influenced by seasonal fluctuations as well as calendar and trending day effects, which can cover relevant short- and long-term movements of the time series and obscure a clear understandin...

Bei der Analyse realer Systeme treten verschiedene Arten von Ungewissheit (Uncertainty) auf. Die wichtigsten sind Variabilität, Datenunsicherheit, physikalische Ungewissheit, Modellungewissheit, Ungewissheit bezüglich Folgewirkungen und Ungewissheit von Hypothesen. In diesem Beitrag werden mathematische Modelle zur Analyse verschiedener Arten von U...

In reliability analysis there are different kinds of uncertainty present: variability, imprecision of lifetimes, model uncertainty concerning probability distributions, and uncertainty of a-priori information in Bayesian analysis. For the description of imprecise lifetimes so-called fuzzy numbers are suitable. In order to model the uncertainty of a...