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Displaying records 61 to 70 of 106 records.
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61. Copulas for Uncertainty Analysis
Topic: Statistics
Published: 4/20/2010
Author: Antonio M Possolo
Abstract: Applying the Monte Carlo method for propagation of measurement uncertainty described in the GUM Supplement 1, when the input quantities are correlated, involves the specification of a joint probability distribution for these quantities. In practice, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904787

62. Final report of key comparison CCM.P-K3 absolute pressure measurements in gas from 3E-6 Pa to 9E-4 Pa
Topic: Statistics
Published: 3/31/2010
Authors: Douglas A Olson, Patrick J Abbott, Karl Jousten, Fiona J Redgrave, Pardeep Mohan, S S Hong
Abstract: This report describes a CCM key comparison of absolute pressure at five National Metrology Institutes (NMIs) that was carried out from August 1998 to May 2002. The goal of the key comparison was to determine the degree of equivalence at pressures in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904758

63. Sequential Testing to Guarantee The Necessary Sample Size in Clinical Trials
Topic: Statistics
Published: 1/1/2010
Author: Andrew L Rukhin
Abstract: The paper addresses the sequential sampling issues related to attainment of a given number of events in a Poisson process. The problem of guaranteeing the necessary sample size is formulated as that of open-ended hypothesis testing in which one has ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901446

64. Conservative Confidence Ellipsoids for Linear Model Parameters
Topic: Statistics
Published: 12/1/2009
Author: Andrew L Rukhin
Abstract: This paper studies properties of conservative confidence ellipsoids for parameters of a general linear model. These regions are obtained on the basis of a linear estimator when only a vague knowledge of (heterogeneous) error variances is available ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902054

65. Chapter - Batch effects and experimental noise in Microarray Analysis: sources and solutions. Microarray Gene Expressions: The Effects of Varying Certain Measurement Conditions.
Topic: Statistics
Published: 11/2/2009
Author: Walter S Liggett Jr
Abstract: This chapter explores measurements from an experiment with a batch effect induced by switching the mass of RNA analyzed from 400 ng to 200 ng. The experiment has as additional factors the RNA material (liver, kidney, and two mixtures) and the RNA so ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902709

66. Artificial Intelligence Tools for Failure Event Data Management and Probability Risk Analysis for Failure Prevention
Topic: Statistics
Published: 10/25/2009
Authors: Jeffrey T Fong, Pedro Vincente Marcal
Abstract: Over the last thirty years, much research has been done on the development of failure event databases and fatigue modeling of crack growth in pressure vessels and piping. According to a USNRC report (NUREG/CR6674, 2000), results of a fatigue crack g ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903592

67. Innovations in Maximum Likelihood Quantum State Tomography
Topic: Statistics
Published: 10/9/2009
Authors: Scott C Glancy, Emanuel H Knill, Thomas Gerrits, Tracy S. Clement, Brice Robert Calkins, Adriana Eleni Lita, Aaron J Miller, Alan L Migdall, Sae Woo Nam, Richard P Mirin
Abstract: At NIST we are engaged in an experiment whose goal is to create superpositions of optical coherent states (such superpositions are sometimes called "Schroedinger cat" states). We use homodyne detection to measure the light, and we apply ma ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904007

68. 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

69. 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

70. 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



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