-
作者：Bailey, TC; Sapatinas, T; Powell, KJ; Krzanowski, WJ
作者单位：University of Exeter; University of Bristol
摘要：This article considers the use of wavelet methods in relation to a common signal processing problem, that of detecting transient features in sound recordings that contain interference or distortion. In this particular case, the data are various types of underwater sounds, and the objective is to detect intermittent departures (potential signals) from the background sound environment in the data (noise), where the latter may itself be evolving and changing over time. We develop an adaptive mode...
-
作者：Chao, A; Tsay, PK
作者单位：National Tsing Hua University
摘要：The concept of sample coverage used in animal abundance estimation is modified to evaluate the undercount of a census. Lack of independence between the census and its postenumeration survey leads to correlation bias for the standard estimator of population size. An additional recapture sample (besides the census and postenumeration survey) can be used to estimate the correlation bias due to two types of dependences. This work expresses the correlation bias for the three-sample model as a funct...
-
作者：Hansen, M; Kooperberg, C; Sardy, S
作者单位：AT&T; Nokia Corporation; Nokia Bell Labs; Fred Hutchinson Cancer Center; University of Washington; University of Washington Seattle
摘要：In this article we introduce the Triogram method for function estimation using piecewise linear, bivariate splines based on an adaptively constructed triangulation. We illustrate the technique for bivariate regression and log-density estimation and indicate how our approach can be applied directly to model bivariate functions in the broader context of an extended linear model. The entire estimation procedure is invariant under affine transformations and is a natural approach for modeling data ...
-
作者：Yu, KM; Jones, MC
作者单位：Open University - UK
摘要：In this article we study nonparametric regression quantile estimation by kernel weighted local linear fitting. Two such estimators are considered. One is based on localizing the characterization of a regression quantile as the minimizer of E{rho(p)(Y-a)\X = x}, where rho(p) is the appropriate check function. The other follows by inverting a local linear conditional distribution estimator and involves two smoothing parameters, rather than one. Our aim is to present fully operational versions of...
-
作者：Boneh, S; Boneh, A; Caron, RJ
作者单位：Technion Israel Institute of Technology; University of Windsor
摘要：A sample of N units is taken from a population consisting of an unknown number of species. We are interested in estimating the number of species and the prediction function for future sampling. The prediction function is defined as the expected number of new species that will be found if an additional sample of size tN is taken for any positive real number t. In this paper we point out that an estimator suggested by Efron and Thisted lacks some essential properties of the true prediction funct...
-
作者：Wang, YN; McDermott, MP
作者单位：University of Rochester
摘要：The conditional likelihood ratio test is derived for significance of a multivariate mean having nonnegative components. This test is shown to be uniformly more powerful than the unconditional likelihood ratio test derived by Perlman. The computation involved in the new test is a straightforward progamming task. Simulation results suggest that this test is also uniformly more powerful than a half-space test proposed by Tang and Hotelling's T-2 test. The consistency, invariance and unbiasedness ...
