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System uncertainties play a major role in reliability analysis performed in design optimization. According to the Guide to the expression of Uncertainty in Measurement, linear approximation or Monte Carlo simulation can be used to perform the reliability analysis. Unfortunately the linear approximation is unreliable for non-linear problems and the Monte Carlo approach is computationally expensive...
A critical venturi nozzle with conical inlet is designed on account of the machining difficulty for the structure with circular arc entrance under small scales such as diameter less than 200μm The numerical simulation method is adopted to optimize the structure of the cirtical nozzles. The impact on the discharge coefficient of the nozzle is analyzed caused by the various geometrical parameters such...
This study aims to analyze the reflectivity measurement uncertainty of a spectrophotometer, with considerations of the perpendicular incidence/reflection, scattering, and artificial manipulation. The operation procedure is designed to utilize a double beam spectrophotometric system, taking advantage of the direct comparison of the luminous intensity to evaluate the uncertainty. The environmental range...
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