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作者：NEUHAUSER, C
摘要：We construct a statistical test for a sequence alignment problem which enables us to decide whether two given sequences are related. Such a test can be used in DNA and protein sequence comparisons. It is based on a comparison of two long sequences of i.i.d. letters taken from a finite alphabet. The test statistic typically employed is the length of the longest matching region between the two sequences in which a certain number of insertions and deletions but no mismatches are allowed. We give ...
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作者：MURPHY, SA
摘要：The frailty model is a generalization of Cox's proportional hazards model which includes a random effect. Nielsen, Gill, Andersen and Sorensen proposed an EM algorithm to estimate the cumulative baseline hazard and the variance of the random effect. Here existence and consistency of the estimators are proved. An example using truncated and censored data is considered.
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作者：LI, B; MCCULLAGH, P
作者单位：University of Chicago
摘要：A quasiscore function, as defined by Wedderbum and by McCullagh, frequently fails to have a symmetric derivative matrix Such a score function cannot be the gradient Of any Potential function on the parameter space; that is, there is no ''quasilikelihood.'' Without a likelihood function it is difficult to distinguish good roots from bad roots or to set satisfactory confidence limits. From a different perspective, a potential function seems to be essential in order to give the theory an approxim...
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作者：NABEYA, S; TANAKA, K
作者单位：Hitotsubashi University
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作者：DEVROYE, L
摘要：We use the probabilistic method to show that iff(nh) is the standard kernel estimate with smoothing factor h, then there exists a deterministic sequence h(n) such that, for all densities, [GRAPHICS]
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作者：SHAO, J
摘要：We study linear combinations of order statistics (L-statistics) in survey problems with a stratified multistage sampling design. Two general types of L-statistics are considered: smooth L-statistics with weights generated by a smooth function and nonsmooth L-statistics (sample quantiles). The trimmed sample mean, the decile mean and variance, the sample Lorenz curve and the sample Gini's family parameters are examples of smooth L-statistics or functions of smooth L-statistics used in survey pr...
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作者：NAGARAJA, HN; DAVID, HA
作者单位：Medical College of Wisconsin
摘要：For a random sample of size n from an absolutely continuous bivariate population (X,Y), let X(i:n) denote the ith order statistic of the X sample values. The Y-value associated with X(i:n) is denoted by Y([i:n]) and is called the concomitant of the ith order statistic. For 1 less-than-or-equal-to k less-than-or-equal-to n, let V(k,n) = Max(Y([n-k+1: n)],..., Y([n:n])). In this paper, we discuss the finite-sample and the asymptotic distributions of V(k,n). We investigate the limit distribution ...
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作者：DONNELL, DJ; BUJA, A; STUETZLE, W
作者单位：AT&T; Nokia Corporation; Nokia Bell Labs; University of Washington; University of Washington Seattle
摘要：Additive principal components are a nonlinear generalization of linear principal components. Their distinguishing feature is that linear forms Sigma(i) alpha(i)X(i) are replaced with additive functions Sigma(i) phi(i)(X(i)). A considerable amount of flexibility for fitting data is gained when linear methods are replaced with additive ones. Our interest is in the smallest principal components, which is somewhat uncommon. Smallest additive principal components amount to data descriptions in term...
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作者：DOSS, H
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作者：TIERNEY, L
摘要：Several Markov chain methods are available for sampling from a posterior distribution. Two important examples are the Gibbs sampler and the Metropolis algorithm. In addition, several strategies are available for constructing hybrid algorithms. This paper outlines some of the basic methods and strategies and discusses some related theoretical and practical issues. On the theoretical side, results from the theory of general state space Markov chains can be used to obtain convergence rates, laws ...
