The estimation of treatment effect for the censored bivariate data under the univariate censoring

This paper establishes a nonparametric estimator for the treatment effect on censored bivariate data under unvariate censoring. This proposed estimator is based on the one from Lin and Ying(1993)'s nonparametric bivariate survival function estimator, which is itself a generalized version of Park and Park(1995)' quantile estimator. A Bahadur type representation of quantile functions were obtained from the marginal survival distribution estimator of Lin and Ying' model. The asymptotic property of this estimator is shown below and the simulation studies are also given     

美国等五国"华人三重性"的比较研究

20世纪90年代以来,对华侨、华人的研究涉及历史、政治、经济、文化、社会等众多领域,涌现了一批有重要学术价值的专著。其中,韩方明博士在其论著《华人与马来西亚现代化进程》中,以马来西亚为例阐释了“华人三重性”即中华性、本地性、国际性的基本内涵。他提出的“华人三重性”理论使笔者深受启发。他指出:“华人三重性是对海外华人本质特征的一个理论表述……在不同的国家会有不同的内容及表现形式,对此进行研究,可以揭示不同国家华人问题的共性和个性。”①而目前学术界多侧重对同一地域不同国家的华人进行比较研究,尚未有人将“华人三重…     

近五年陕西省中小学教师培训多元化需求分析调查及解决策略研究

通过对自2009年以来近五年我国中小学教师专业培训需求研究成果进行分析和整理,分别从培训需求政策、培训动机需求、课程需求、模式需求等方面进行分析,最后提出解决培训中出现的问题和策略,旨在为教育行政部门提供可借鉴的参考。     

Symmetrical Design of Experiment in Global Sensitivity Analysis Based on ANOVA High-dimensional Model Representation

This article reviews symmetrical global sensitivity analysis based on the analysis of variance of high-dimensional model representation. To overcome the computational difficulties and explore the use of symmetrical design of experiment (SDOE), two methods are presented. If the form of the objective function f is known, we use SDOE to estimate the symmetrical global sensitivity indices instead of Monte Carlo or quasi-Monte Carlo simulation. Otherwise, we use the observed values of the experiment to do symmetrical global sensitivity analysis. These methods are easy to implement and can reduce the computational cost. An example is given by symmetrical design of experiment.     

New recursive estimators of the time-average variance constant

Estimation of the time-average variance constant (TAVC) of a stationary process plays a fundamental role in statistical inference for the mean of a stochastic process. Wu (2009) proposed an efficient algorithm to recursively compute the TAVC with \(O(1)\) memory and computational complexity. In this paper, we propose two new recursive TAVC estimators that can compute TAVC estimate with \(O(1)\) computational complexity. One of them is uniformly better than Wu’s estimator in terms of asymptotic mean squared error (MSE) at a cost of slightly higher memory complexity. The other preserves the \(O(1)\) memory complexity and is better then Wu’s estimator in most situations. Moreover, the first estimator is nearly optimal in the sense that its asymptotic MSE is \(2^{10/3}3^{-2} \fallingdotseq 1.12\) times that of the optimal off-line TAVC estimator.     

考古学与未来:工业文明的忧虑

在从考古学角度对玛雅、复活节岛和良渚文明崩溃回顾的基础上,文章从"报酬递减"和"最省力"原理介绍了古代文明崩溃的机制,然后对现代工业文明的发展趋势表示了忧虑.文章认为,今天的地球只不过是一个放大了的玛雅低地和复活节岛.历史教训告诉我们,环境恶化总是文明崩溃的一个前提.面对当代工业文明所面临的人口激增、环境恶化和资源枯竭的严峻形势,我们应该提倡"知足最好"而非"越多越好",避免重蹈古代文明崩溃的覆辙.     

On Bartlett correction of empirical likelihood for regularly spaced spatial data

Bartlett correction constitutes one of the attractive features of empirical likelihood because it enables the construction of confidence regions for parameters with improved coverage probabilities. We study the Bartlett correction of spatial frequency domain empirical likelihood (SFDEL) based on general spectral estimating functions for regularly spaced spatial data. This general formulation can be applied to testing and estimation problems in spatial analysis, for example testing covariance isotropy, testing covariance separability as well as estimating the parameters of spatial covariance models. We show that the SFDEL is Bartlett correctable. In particular, the improvement in coverage accuracies of the Bartlett‐corrected confidence regions depends on the underlying spatial structures. The Canadian Journal of Statistics 47: 455–472; 2019 © 2019 Statistical Society of Canada     

基于“翻转课堂”的大学生信息素质教育设计研究

翻转课堂是一种以学生学习为中心的新型教学方法,通过"翻转课堂"和"传统课堂"的优势比较可知,大学生信息素质教育非常适合这一教学方法,并对"翻转课堂"进行了以学生为中心,以活动为导向的教学设计。     

论档案价值与档案价值实现

依据档案价值的特性及档案价值实现的规律,对档案价值与档案价值的实现进行了思考。人们只有对档案价值的客观性、潜在性、多元性及其具体表现形式有了深刻的了解,才能切实做好档案利用工作,最大限度地开发和利用档案资源,充分发挥档案的价值。     

人文创新对科技创新的影响

科技创新活跃时代的成因涉及到诸多的科学因素和社会因素,其中人文创新的影响是不可缺少的一个重要因素。人文创新对科技创新有着多层面的影响,基本层面和主要途径是:人文创新通过思想解放运动引发科技创新活跃时代的到来;人文创新通过社会制度变迁改变科技创新的人文环境;人文创新通过战略政策调整导引科技创新的主攻方向;人文创新通过教育制度改革提升人才队伍的素质。