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作者：McKeague, IW
作者单位：Columbia University; State University System of Florida; Florida State University
摘要：A Bayesian model for off-line signature verification involving the representation of a signature through its curvature is developed. The prior model makes use of a spatial point process for specifying the knots in an approximation restricted to a buffer region close to a template curvature, along with an independent time-warping mechanism. In this way, prior shape information about the signature can be built into the analysis. The observation model is based on additive white noise superimposed...
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作者：El Barmi, H; Mukerjee, H
作者单位：City University of New York (CUNY) System; Baruch College (CUNY); Wichita State University
摘要：If X-1 and X-2 are random variables with distribution functions F-1 and F-2, then X-1 is said to be stochastically larger than X-2 if F-1 <= F-2. Statistical inferences under stochastic ordering for the two-sample case has a long and rich history. In this article we consider the k-saniple case; that is, we have k populations with distribution functions F-1, F-2,.... F-k, k >= 2, and we assume that F-1 <= F-2 <= (...) <= F-k. For k = 2, the nonparametric maximum likelihood estimators of F, and ...
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作者：Hoff, PD
作者单位：University of Washington; University of Washington Seattle; University of Washington; University of Washington Seattle; University of Washington; University of Washington Seattle
摘要：This article discusses the use of asymmetric multiplicative interaction effect to capture certain types of third-order dependence patterns often present in social networks and other dyadic datasets. Such an effect, along with standard linear fixed and random effects, is incorporated into a generalized linear model, and a Markov chain Monte Carlo algorithm is provided for Bayesian estimation and inference. In an example analysis of international relations data, accounting for such patterns impr...
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作者：Kvam, PH; Peña, EA
作者单位：University System of Georgia; Georgia Institute of Technology; University of South Carolina System; University of South Carolina Columbia
摘要：An estimator for the load-share parameters in an equal load-share model is derived based on observing k-component parallel systems of identical components that have a continuous distribution function F((.)) and failure rate r((.)). In an equal load-share model. after the first of k components fails, failure rates for the remaining components change from r(t) to gamma(1)r(t), then to gamma(2)r(t) after the next failure, and so on. On the basis of observations on n independent and identical syst...
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作者：Merrick, JRW; Soyer, R; Mazzuchi, TA
作者单位：Virginia Commonwealth University; George Washington University; George Washington University
摘要：The Association of American Railroads wished to determine the effect of a maintenance practice known as grinding on the occurrence of rail fatigue defects and on the subsequent total traffic usage before a track must be replaced. Because a designed experiment was not practical, an analysis of historical data from the Canadian Northern Railroad is presented. In the analysis, certain covariate data are available, specifically the amount of grinding and some physical characteristics of the rail; ...
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作者：Shaffer, JP
作者单位：University of California System; University of California Berkeley
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作者：Benjamini, Y; Yekutieli, D
作者单位：Tel Aviv University
摘要：Often in applied research, confidence intervals (CIs) are constructed or reported only for parameters selected after viewing the data. We show that such selected intervals fail to provide the assumed coverage probability. By generalizing the false discover), rate (FDR) approach from multiple testing to selected multiple CIs, we suggest the false coverage-statement rate (FCR) as a measure of interval coverage following selection. A general procedure is then introduced, offering FCR control at l...
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作者：Midthune, DN; Fay, MP; Clegg, LX; Feuer, EJ
作者单位：National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI); National Institutes of Health (NIH) - USA; NIH National Institute of Allergy & Infectious Diseases (NIAID); National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI); NIH Division of Cancer Control & Population Sciences
摘要：The Surveillance, Epidemiology, and End Results (SEER) program of the National Cancer Institute is an authoritative source of cancer incidence statistics in the United States. The SEER program is a consortium of population-based cancer registries from different areas of the country. Each registry is charged with collecting data on all cancers that occur within its geographic area. As with any disease registry, there is a delay between the time that the disease (cancer) is first diagnosed and t...
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作者：Yan, J; Fine, JP
作者单位：University of Iowa; University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison
摘要：We consider multivariate temporal processes that are continuously observed within overlapping time windows. The intended application is in censored multistate and multivariate survival settings, where point processes are continuously observed. These data differ from other functional data, like longitudinal data, which are discretely observed at irregular times. Existing functional approaches to survival processes use intensity models, which require smoothing and depend critically on the choice...
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作者：Stein, ML
作者单位：University of Chicago
摘要：This work considers a number of properties of space-time covariance functions and how these relate to the spatial-temporal interactions of the process. First, it examines how the smoothness away from the origin of a space-time covariance function affects, for example, temporal correlations of spatial differences. Models that are not smoother away from the origin than they are at the origin, such as separable models, have a kind of discontinuity to certain correlations that one might wish to av...
