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Displaying records 71 to 80 of 109 records.
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71. Gauging the Repeatability of 3D Imaging Systems by Sphere Fitting
Topic: Statistics
Published: 9/30/2009
Authors: Marek Franaszek, Geraldine S Cheok, Kamel Shawki Saidi
Abstract: Multiple scans of the same object acquired with 3D imaging system (e.g., laser scanner) in the same experimental conditions could provide valuable information about the instrument s performance (e.g., stability, existence of bias, measurement error). ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903444

72. Sensitivities and Variances for Fitted Parameters of Spheres
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7616
Topic: Statistics
Published: 7/1/2009
Authors: Christoph Johann Witzgall, Marek Franaszek
Abstract: Experimental data have been gathered by applying 3D imaging systems, such as LIDAR/LADAR instruments, to spherical objects. This report provides a compilation of the statistical and analytical procedures to be used for an evaluation, to be reported ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903340

73. A generalized method for multiple artifacts problem in interlaboratory comparisons with linear trends
Topic: Statistics
Published: 5/22/2009
Authors: Weiping Zhang, Nien F Zhang
Abstract: A generalized statistical approach for interlaboratory comparisons with linear trends is proposed. This new approach can be applied to the general case when the artifacts are measured and reported multiple times in each participating laboratory. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890065

74. Weighted Means Statistics in Interlaboratory Studies
Topic: Statistics
Published: 5/6/2009
Author: Andrew L Rukhin
Abstract: The usefulness of weighted means statistics as a consensus mean estimator in collaborative studies is discussed. A random effects model designed to combine information from several sourcesis employed to justify their appeal to metrologists. Some met ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901445

75. An Application of the Residue Calculus: The Distribution of the Sum of Non-Homogeneous Gamma Variates
Topic: Statistics
Published: 2/2/2009
Author: Robert Charles Hagwood
Abstract: The probability density function for the sum of gamma variates with different shape parameters is found, using the inversion formula and the calculus of residues. This derivation seems more elegant than previous methods to derive the probability dens ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51284

76. Three Statistical Paradigms for The Assessment and Interpretation of Measurement Uncertainty
Topic: Statistics
Published: 1/12/2009
Authors: William F Guthrie, Hung-Kung Liu, Andrew L Rukhin, Blaza Toman, Chih-Ming Wang, Nien F Zhang
Abstract: The goals of this chapter are to present different approaches to uncertainty assessment from a statistical point of view and to relate them to the methods that are currently being used in metrology or are being developed within the metrology communit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51273

77. My experience as a Commerce Science and Technology Fellow on Capitol Hill
Topic: Statistics
Published: 12/31/2008
Author: Ana I. Aviles
Abstract: How did I age a decade in less than a year? I worked for a Member of Congress and I made the most of my time on Capitol Hill! For ten months I served as primary advisor to Congressman Fortu o (R-PR) on science, space, technology, and telecommunicat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900201

78. Fiducial Intervals for the Magnitude of a Complex-Valued Quantity
Topic: Statistics
Published: 12/19/2008
Authors: Chih-Ming Wang, Hariharan K Iyer
Abstract: This paper discusses a fiducial approach for constructing uncertainty intervals for the distance between k normal means and the origin. When k=2 this distance is equivalent to the magnitude of a complex-valued quantity. Uncertainty intervals for the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890046

79. Calibration and Uncertainty Analysis of Predictions from Computational Models
Topic: Statistics
Published: 8/18/2008
Author: Blaza Toman
Abstract: Computer experiments, that is, experiments performed using a mathematical model of a physical or chemical process implemented using a computer simulation are especially useful when extensive physical experimentation is either impossible or too expens ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152145

80. Classical and Bayesian Interpretation of the Birge Test of Consistency and Its Generalized Version in Interlaboratory Evaluations
Topic: Statistics
Published: 4/10/2008
Authors: Raghu N Kacker, Alistair Forbes, Ruediger Kessel, K D Sommer
Abstract: The results from an interlaboratory evaluation are said to be consistent if their dispersion is not more than what can reasonably be attributed to their stated variances. A well known test of consistency in interlaboratory evaluations is the Birge te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51220



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