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Displaying records 61 to 70 of 115 records.
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61. 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 R. 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

62. Interlaboratory Comparisons
Topic: Statistics
Published: 12/10/2007
Author: William F Guthrie
Abstract: An interlaboratory comparison for a measurement procedure is an exercise carried out by a group of laboratories to compare their performance or assess a measurement standard. Interlaboratory comparisons are typically used for one of three main purpos ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51102

63. Laplace Random Effects Models for Interlaboratory Studies
Topic: Statistics
Published: 11/25/2010
Authors: Andrew L Rukhin, Antonio M Possolo
Abstract: A model is introduced for measurements obtained in collaborative interlaboratory studies, comprising measurement errors and random laboratory effects that have Laplace distributions, possibly with heterogeneous, laboratory-specific variances. Estima ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903611

64. Limit of detection determination for censored samples.
Topic: Statistics
Published: 1/11/2011
Author: Andrew L Rukhin
Abstract: The problem of setting the limit of detection is considered for censored samples and heterogeneous errors. After formal definitions of the critical level and of the method detection limit, we introduce simplified maximum likelihood-type estimators ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906715

65. Linking the Results of CIPM and RMO Key Comparisons with Linear Trends
Series: Journal of Research (NIST JRES)
Topic: Statistics
Published: 6/30/2010
Author: Nien F Zhang
Abstract: A statistical approach to link the results of interlaboratory comparisons with linear trends is proposed. This approach can be applied to the case that the comparisons have the same nominal values or of a same magnitude. The degrees of equivalence be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902845

66. Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Interlaboratory Comparison of Mixtures of Polystyrene With Different End Groups: Statistical Analysis of Mass Fractions and Mass Moments
Topic: Statistics
Published: 7/1/2005
Authors: Charles Martin Guttman, S Wetzel, Kathleen M. Flynn, B M Fanconi, David Lloyd VanderHart, William E Wallace III
Abstract: A matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) interlaboratory comparison was conducted on mixtures of synthetic polymers having the same repeat unit and closely matching molecular mass distributions but ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852470

67. Maximum Likelihood and Restricted Likelihood Solutions in Multiple-Method Studies
Series: Journal of Research (NIST JRES)
Topic: Statistics
Published: 1/31/2011
Author: Andrew L Rukhin
Abstract: A formulation of the problem of combining data from several sources is discussed in terms of random effects models. The unknown measurement precision is not supposed to be constant among laboratories whose summary results may seem not to conform to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906278

68. Maximum-likelihood fits to histograms for improved parameter estimation
Topic: Statistics
Published: 2/7/2014
Author: Joseph Westbrook Fowler
Abstract: Straightforward methods for adapting the familiar {chi}^u2^ statistic to histograms of discrete events and other Poisson distributed data generally yield biased estimates of the parameters of a model. The bias can be important even when the total ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914398

69. Model Selection for Good Estimation and Prediction Over a User-Speci ed Covariate Distribution for Linear Models Under the Frequentist Paradigm
Topic: Statistics
Published: 10/26/2011
Author: Adam L Pintar
Abstract: Model selection is an important part of estimation and prediction for linear models with multiple explanatory variables (covariates). A variety of approaches exist that focus on estimation of model parameters or the t of the model where data have be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908794

70. Models and Confidence Intervals for True Values in Interlaboratory Trials
Topic: Statistics
Published: 12/6/2004
Authors: Hariharan K Iyer, Chih-Ming Wang, T Mathew
Abstract: We consider the one-way random effects model with unequal sample sizes and heterogeneous variances. Using the method of generalized confidence intervals, we develop a new confidence interval procedure for the mean. Additionally, we investigate two ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51088



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