The aim of this study is to fit a calibration curve to a multivariate system. The experimental data are generated from the calibration of the aerodynamic external balance of the subsonic wind n.º 2, the TA-2, of the Brazilian Aerospace Institute, IAE. Multilayer Perceptrons (MLPs) Artificial Neural Networks are employed. To fit the calibration curve, the MLPs are submitted to the learning process. The measurement uncertainties are taken into consideration, through the modification of the MLP learning algorithm, which in its classical approach, considers the data points free from error sources. The results of both methodologies, learning algorithm endowed or without uncertainties, are compared.

The main purpose of this paper is to present a possibility theory-based generalization of conventional interval propagation to coverage intervals. Indeed, the whole set of coverage intervals for all the probability levels stacked on top of one another constitutes a possibility distribution. Thus by slight modifications of Zadeh’s extension principle, we will prove that it is possible to compute the coverage intervals of an indirect measurement from many other measurements (possibly dependent) by a known non decreasing relationship.

Paper considers the problems of globalisation of the world economy and the role of national metrological services, main directions activity of international and regional organizations in the field of metrology.

The demands for qualified metrology consultancy and technical support are increasing exponentially due to the current market conditions. Consumers are more aware of quality issues than ever before, informed by the mass media and supported by organizations of consumer–right defense. Companies are investing in better testing and inspection facilities to bear the development of new products and processes, to maintain the processes operating on target with minimum variance and to segregate non-conforming products before they can reach the hands of the customer. In this scenery, there is a complete collection of free-lance professionals, technology centers and other companies and organizations that provide consultancy and metrology services pushed by the above-mentioned demand. Central LASAR is a remote laboratory that appeared as a channel to normalize these relations. The solution has been tested, showing that the approach is technically and economically feasible for the service suppliers as well as for their customers, including the increasing of social coresponsibility aspects between customers and suppliers.

This bilateral comparison in HRC was conducted in order to confirm the accuracy claimed by National Institute of Metrology (Thailand) or (NIMT) and Vietnam Metrology Institute (VMI). Also, this bilateral comparison compares the difference of measurement results between lever-type machine and deadweight-type machine of two NMIs, which are NIMT and VMI, respectively.