Papers by Keyword: Expanded Uncertainty

Abstract: Measurement uncertainty in the water content test for soil samples is an index for evaluating the reliability of the experiment. It affects the accuracy of some parameters such as porosity and saturation, which are derived from water content. According to the requirements of the standard JJF 1059-1999 Uncertainty Evaluation and Denotation of the Measurement Results, the uncertainty for the measurement results of the water content in soil samples was evaluated. Concerning the characteristics of the water content determination in soil samples, a pail of soil sample was taken as specimen due to its relative homogeneity. The factors affecting the measurement accuracy were discussed. The result shows that the expanded uncertainty of measurement results of the water content in soil samples was 1.6% under the proposed testing conditions.

Abstract: In the public transport vehicle, vertical and lateral behaviors have a significant effect on ride comfort and safety of passengers on curved track. Based on vertical and lateral vibration accelerations measured on floor level in passenger compartment when the K-AGT ran on the minimum curvature of the 2.4km-test track in driverless mode, expanded uncertainties in measurement were estimated statistically. In addition, vertical and lateral dynamic behaviors of the K-AGT were discussed in this paper.