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作者：Dorazio, RM; Royle, JA
作者单位：United States Department of the Interior; United States Geological Survey; United States Department of the Interior; United States Geological Survey
摘要：We develop a model that uses repeated observations of a biological community to estimate the number and composition of species in the community. Estimators of community-level attributes are constructed from model-based estimators of occurrence of individual species that incorporate imperfect detection of individuals. Data from the North American Breeding Bird Survey are analyzed to illustrate the variety of ecologically important quantities that are easily constructed and estimated using our m...
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作者：Sim, CH; Gan, FF; Chang, TC
作者单位：Universiti Malaya; National University of Singapore; University of Macau
摘要：In this article we focus on the detection of possible outliers based on the widely used boxplot procedures. The outliers in a set of data are defined to be a subset of observations that appear to be inconsistent with the remaining observations. We identify the outliers by constructing a boxplot with its lower fence (LF) and upper fence (UF) either (a) satisfying the requirement that if the given sample is outlier-free, then the probability that one or more of the sample data would fall outside...
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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：Kosorok, MR; Ma, SG
作者单位：University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison
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作者：Cook, RD; Ni, LQ
作者单位：University of Minnesota System; University of Minnesota Twin Cities; State University System of Florida; University of Central Florida
摘要：A family of dimension-reduction methods, the inverse regression (IR) family, is developed by minimizing a quadratic objective function. An optimal member of this family, the inverse regression estimator (IRE), is proposed, along with inference methods and a computational algorithm. The IRE has at least three desirable properties: (1) Its estimated basis of the central dimension reduction subspace is asymptotically efficient, (2) its test statistic for dimension has an asymptotic chi-squared di...
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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：Reiter, JP
作者单位：Duke University
摘要：When statistical agencies release microdata to the public, malicious users (intruders) may be able to link records in the released data to records in external databases. Releasing data in ways that fail to prevent such identifications may discredit the agency or, for some data, constitute a breach of law. To limit disclosures, agencies often release altered versions of the data; however, there usually remain risks of identification. This article applies and extends the framework developed by D...
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作者：Scott, SL; James, GM; Sugar, CA
作者单位：University of Southern California
摘要：Medical researchers interested in temporal, multivariate measurements of complex diseases have recently begun developing health state models, which divide the space of patient characteristics into medically distinct clusters. The current state of the art in health services research uses k-means clustering to form the health states and a first-order Markov chain to describe transitions between the states. This fitting procedure ignores information from temporally adjacent observations and preve...
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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：Liao, JG; Qaqish, BF
作者单位：Rutgers University System; Rutgers University New Brunswick; Rutgers University Biomedical & Health Sciences; University of North Carolina; University of North Carolina Chapel Hill
