Abstract：Deal with the limitations of measurement uncertainty evaluation method based on ISO GUM, A new approach to the evaluation of measurement uncertainty based on the polynomial chaos theory is presented. The main assumptions behind the measurement uncertainty propagation based on the GUM is analyzed. The measurement uncertainty evaluation used the PCT approach is provided. By the GUM and PCT method, the relative absolute difference between the confidence obtained in the two cases and the true value is computed. It is show that in case of a distribution very different from the Gaussian, the polynomial approach leads to results very close to the ideal case.
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2015, Vol. 36 
