by Propulsion Research Center, University of Alabama in Huntsville, National Aeronautics and Space Administration, National Technical Information Service, distributor in [Huntsville, Ala.], [Washington, DC, Springfield, Va .
Written in English
|Statement||prepared by Kendall K. Brown ; Hugh W. Coleman, principal investigator; Clark W. Hawk.|
|Series||NASA contractor report -- NASA CR-201137.|
|Contributions||Coleman, Hugh W., Hawk, Clark W., United States. National Aeronautics and Space Administration.|
|The Physical Object|
This book is a practical guide to the uncertainty analysis of computer model applications. Used in many areas, such as engineering, ecology and economics, computer models are subject to various uncertainties at the level of model formulations, parameter values and input : Springer International Publishing. Create a new account. The model uncertainties for the static analysis (determination of the settlement at a given load and the ultimate bearing capacity) of square foundations on sand under axial compression are characterized using 67 field load tests. The model uncertainty for calculating the ultimate bearing capacity is represented by a Cited by: 2. It is now becoming recognized in the measurement community that it is as important to communicate the uncertainty related to a specific measurement as it is to report the measurement itself. Without knowing the uncertainty, it is impossible for the users of the result to know what confidence can be placed in it; it is also impossible to assess the comparability of different measurements of the. Determination of concentration C Crm kStd nCrm d Std k Where: C au = Concentration of Au in sample Crm m = ICP measured concentration of sample Crm f = Dilution factor for sample Std p = Prepared concentration of SRM Std m = ICP measured concentration of standard C _ s L L10, mg/L Component Symbol Value NIST SRM conc.
The in looking in a reference book, the student finds a published value of m/s. Since both of these are measurements, and therefore have some uncertainty associated with them, we cannot be absolutely sure that either is exactly correct. None the less, we believe that there is less. The average deviation, = cm The standard deviation is: The significance of the standard deviation is this: if you now make one more measurement using the same meter stick, you can reasonably expect (with about 68% confidence) that the new measurement will be within cm of the estimated average of cm. What Are the Three Types of Uncertainty in Management?. Small-business managers face a wide range of challenges. Between handling employee issues, maintaining product or service quality and trying to keep cash flows positive, managers get pulled in multiple directions. One of the hardest parts of managing a business. Yong Bai, Wei-Liang Jin, in Marine Structural Design (Second Edition), Model Uncertainty. Model uncertainty is uncertainty due to imperfections and idealizations made in physical model formulations for load and resistance, as well as in the choices of probability distribution types for the representation of uncertainties.. With very few exceptions, it is often not possible to make highly.
The same reference group consisting of six persons with a broad and varied competence from oil and gas measurement has again evaluated and commented the handbook. The reference group consisted of: Eide, John, Holta & Håland Folkestad, Trond, Norsk Hydro Frøystein, Hans Arne, The Norwegian Metrology and Accreditation Service. procedures for estimating measurement uncertainties (ISO/IEC, ). The National Environ-mental Laboratory Accreditation Conference (NELAC) has also published a standard on labora-tory quality systems, which requires a radiochemical testing laboratory to report with each result its associated measurement uncertainty (NELAC, , ch. 5). The uncertainty components that were quantified in the previous lecture are now combined into the combined standard uncertainty (uc) – standard uncertainty that takes into account contributions from all important uncertainty sources by combining the respective uncertainty components. The concept of indirect measurement – whereby the value of the output quantity (measurement result) is. A critical drift correction, especially for a new instrument, is the surface degradation of the artificial, wide d-spacing, PET analyzing crystal due to X-ray bombardment. The PET crystal is used for the determination of Al and Si intensities therefore it is vital for the .