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Topic Area: Statistics

Displaying records 1 to 10 of 107 records.
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1. Optimizing Hybrid Metrology through a Consistent Multi-Tool Parameter Set and Uncertainty Model
Topic: Statistics
Published: 4/14/2014
Authors: Richard M Silver, Bryan M Barnes, Nien F Zhang, Hui Zhou, Andras Vladar, John S Villarrubia, Regis J Kline, Daniel Franklin Sunday, Alok Vaid
Abstract: There has been significant interest in hybrid metrology as a novel method for reducing overall measurement uncertainty and optimizing measurement throughput (speed) through rigorous combinations of two or more different measurement techniques into a ...

2. Bootstrap Variability Studies in ROC Analysis on Large Datasets
Topic: Statistics
Published: 3/19/2014
Authors: Jin Chu Wu, Alvin Martin, Raghu N Kacker
Abstract: The nonparametric two-sample bootstrap is employed to compute uncertainties of measures in receiver operating characteristic (ROC) analysis on large datasets in areas such as biometrics, and so on. In this framework, the bootstrap variability was emp ...

3. 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 ...

4. Restricted Likelihood Representation for Multivariate Heterogeneous Random Effects Models
Topic: Statistics
Published: 1/31/2014
Author: Andrew L Rukhin
Abstract: In the random-effects model of meta-analysis for heterogeneous multidimensional data a canonical representation of the restricted likelihood function is obtained. This representation is related to a linear data transform which is based on the algebr ...

5. Comparison of 1D, 2D and 3D nodule sizing methods by radiologists for spherical and complex nodules on thoracic CT phantom images
Topic: Statistics
Published: 1/11/2014
Authors: John Lu, Charles D. Fenimore
Abstract: Purpose: To estimate the bias and variance of radiologists measuring the size of spherical and complex synthetic nodules. Methods: This study did not require IRB approval. Six radiologists estimated the size of 10 synthetic nodules embedded within ...

6. Bayes Estimators of Heterogeneity Variance and T-Systems
Topic: Statistics
Published: 1/8/2014
Author: Andrew L Rukhin
Abstract: The considered problem concerns simultaneous inference for curve-confined natural parameters of independent, heterogeneous gamma-random variables with known shape parameters. The meta-analysis motivated loss function is suggested and some propertie ...

7. R implementation of a polyhedral approximation to a 3D set of points using the alpha-shape
Topic: Statistics
Published: 1/1/2014
Authors: Thomas Victor Emmanuel Lafarge, Beatriz Pateiro Lopez, Antonio M Possolo, Joy P Dunkers
Abstract: This work describes the implementation in R of the alpha-shape of a finite set of points in three-dimensional space. This geometric construct generalizes the convex hull and estimates the shape of non-convex and even non-connected sets in 3D, given r ...

8. Compatibility Verification of Certified Reference Materials and User Measurements
Topic: Statistics
Published: 12/9/2013
Author: Andrew L Rukhin
Abstract: A problem that frequently occurs in metrology is one of assessing compatibility of data obtained by a user laboratory with the specified values and uncertainty estimates from the certificate of analysis. The user‰s data are summarized by a measura ...

9. Allocating Attribute-Specific Information-Gathering Resources to Improve Selection Decisions
Topic: Statistics
Published: 12/8/2013
Author: Dennis D Leber
Abstract: When collecting data to select an alternative from a finite set of alternatives that are described by multiple attributes, one must allocate effort to activities that provide information about the value of each attribute. This is a particularly rele ...

10. Testing Equality of Cell Populations Based on Shape and Geodesic Distance
Topic: Statistics
Published: 12/3/2013
Authors: Robert Charles Hagwood, Javier Bernal, Michael W Halter, John T Elliott
Abstract: Image cytometry has emerged as a valuable in-vitro screening tool and advances in automated microscopy have made it possible to readily analyze large cellular populations of image data. A statistical procedure to study homogeneity of such data ...

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