Inference in the presence of ranking error in ranked set sampling

The author proposes inference techniques for ranked set sample data in the presence of judgment ranking errors. He bases his analysis on the models of Bohn & Wolfe (1994) and Frey (2007a, b), of which parameters are estimated by minimizing a distance measure. He then uses the fitted models to calibrate confidence intervals and tests. He shows the validity of his approach through simulation and illustrates its application through the construction of distribution‐free confidence intervals for the median area of apple tree leaves covered by a spray.     

谈清单计价模式下的造价控制

从保障建设单位利益出发,把握好项目招标及合同管理,抓好施工阶段管理,严把竣工决算审核关三方面来阐述清单计价模式下的造价控制.     

我国资本外逃的规模测算及动因分析

由于转轨期产权制度不完善、对内外资的差别待遇、私人财产保护制度不健全和财政赤字政策等制度性因素,我国出现了大规模的资本外逃现象。为防范和控制资本外逃,应通过健全现代产权制度、取消外资的"超国民待遇"等制度措施减弱资本外逃的动机,以及通过加强金融监管、严厉打击地下银行等措施对资本外逃的渠道加以截堵。     

An online copy number variant detection method for short sequencing reads

The availability of the next generation sequencing (NGS) technology in today's biomedical research has provided new opportunities in scientific discovery of genetic information. The high-throughput NGS technology, especially DNA-seq, is particularly useful in profiling a genome for the analysis of DNA copy number variants (CNVs). The read count (RC) data resulting from NGS technology are massive and information rich. How to exploit the RC data for accurate CNV detection has become a computational and statistical challenge. We provide a statistical online change point method to help detect CNVs in the sequencing RC data in this paper. This method uses the idea of online searching for change point (or breakpoint) with a Markov chain assumption on the breakpoints loci and an iterative computing process via a Bayesian framework. We illustrate that an online change-point detection method is particularly suitable for identifying CNVs in the RC data. The algorithm is applied to the publicly available NCI-H2347 lung cancer cell line sequencing reads data for locating the breakpoints. Extensive simulation studies have been carried out and results show the good behavior of the proposed algorithm. The algorithm is implemented in R and the codes are available upon request.     

Generalized Estimation of the BLUP in Mixed-Effects Models: A Comparison with ML and REML

The Best Linear Unbiased Predictor (BLUP) in mixed models is a function of the variance components and they are estimated using maximum likelihood (ML) or restricted ML methods. Nonconvergence of BLUP would occur due to a drawback of the standard likelihood-based approaches. In such situations, ML and REML either do not provide any BLUPs or all become equal. To overcome this drawback, we provide a generalized estimate (GE) of BLUP that does not suffer from the problem of negative or zero variance components, and compare its performance against the ML and REML estimates of BLUP. Simulated and published data are used to compare BLUP.     

A Nonparametric Test Procedure Based on Quantiles for the Right Censored Data

In this study, we propose nonparametric tests using the several quantile statistics simultaneously for the right censored data. First of all, we consider statistics of the quadratic form with estimated covariance matrices. Then we derive the limiting distribution using the large sample approximation theory. Also we consider different forms of statistics such as the maximal and summing types with their limiting distributions. Then we illustrate our procedure with examples and compare performance among tests with empirical powers through a simulation study. Also we comment briefly on some interesting features including re-sampling methods as concluding remarks. Finally in Appendices, we provide proofs for the theoretic results needed for the derivation of the limiting distributions of the proposed test statistics.     

加强西部开发中建设项目的投资控制

随着西部大开发战略的实施 ,通过基本建设投资改进我国西部地区的基础条件已成为重点。而在基本建设投资过程中 ,投资控制往往被人们忽略。本文提出了几种有效的投资控制措施 ,以确保基本建设投资综合效益的实现     

模糊综合评判法在课堂授课质量评价中的应用

课堂授课质量的评价是教学环节中一项重要的工作,在评价过程中不可避免地存在大量的模糊性等不确定性因素,为了更客观、公正、恰当地给出相应的评价,以便促进课堂教学质量的提高。本文给出了一种模糊综合评判方法,并以具体的实例验证和说明了该方法的有效性和可行性。     

基于 JCR 的不同学科类目文献计量学指标的统计与分析

基于2011年JCR网络版,对JCR所划分的176个学科类目的文献计量学指标,包括总被引频次、中值影响因子、学科集合影响因子、学科集合立即指数、学科集合被引半衰期、学科期刊数和学科总文章数,进行了统计与分析.结果表明：不同学科类目计量指标差异很大.建议在学术期刊评比和科研绩效评价时,应使用相对指标来消除学科之间的差异.     

A Characterization of the Normal Family of Distributions Based on the Bias of the Maximum Likelihood Estimator

This paper characterizes the family of Normal distributions within the class of exponential families of distributions, via the structure of the bias of the maximum likelihood estimator Θ _n of the canonical parameter Θ . More specifically, when E _θ ( Θ n ) – Θ = (1/ n ) Q ( Θ ) + o (1/ n ), the equality Q ( Θ ) = 0 proves to be a property of the Normal distribution only. The same conclusion is obtained for the one-dimensional case bt assuming that Q ( Θ ) is a polynomial of Θ .