挠性转子动不平衡量的极大似然估计

本文提出利用模态参数识别技术进行挠性转子动平衡的方法。为了计及平衡过程中测试数据的误差,对动不平衡量采用极大似然估计。本文给出计算机模拟的几个实例以论证此种方法,并提出加速收敛的措施。计算结果表明此法效果是鸿意的。     

主流叶片气动有限元计算及试验研究

为了减少蒸汽透平高压级中存在的严重流动损失,本文提出一种新的由主、分流叶片组成的多分流喷嘴叶栅结构,文章着重讨论了主流叶片的气动设计原理,试验表明,这些原则是成功的。     

网上CAI

用好现代先进技术,开展网络建设,是教育信息化的第一步。本文基于这一思想,介绍了网上CAI的设计思路,描述了该系统的功能,以及实现系统所采用的技术措施。     

穗港两所高校《英语教学法》课程结构比较

本文通过对比穗港两所高校《英语教学法》课程模式的异同,阐述当前的师培工作中一些引人注意的特点,如反思教学、行为研究、教师职业发展、教师认知过程等等。显然,当前师培者正承担越来越重要的自我更新的责任     

Parallel tempering for dynamic generalized linear models

ABSTRACT

Markov chain Monte Carlo (MCMC) methods can be used for statistical inference. The methods are time-consuming due to time-vary. To resolve these problems, parallel tempering (PT), as a parallel MCMC method, is tried, for dynamic generalized linear models (DGLMs), as well as the several optimal properties of our proposed method. In PT, two or more samples are drawn at the same time, and samples can exchange information with each other. We also present some simulations of the DGLMs in the case and provide two applications of Poisson-type DGLMs in financial research.     

Estimation on semi-functional linear errors-in-variables models

Abstract

Semi-functional linear regression models are important in practice. In this paper, their estimation is discussed when function-valued and real-valued random variables are all measured with additive error. By means of functional principal component analysis and kernel smoothing techniques, the estimators of the slope function and the non parametric component are obtained. To account for errors in variables, deconvolution is involved in the construction of a new class of kernel estimators. The convergence rates of the estimators of the unknown slope function and non parametric component are established under suitable norm and conditions. Simulation studies are conducted to illustrate the finite sample performance of our method.     

On distribution-weighted partial least squares with diverging number of highly correlated predictors

Summary.  Because highly correlated data arise from many scientific fields, we investigate parameter estimation in a semiparametric regression model with diverging number of predictors that are highly correlated. For this, we first develop a distribution-weighted least squares estimator that can recover directions in the central subspace, then use the distribution-weighted least squares estimator as a seed vector and project it onto a Krylov space by partial least squares to avoid computing the inverse of the covariance of predictors. Thus, distrbution-weighted partial least squares can handle the cases with high dimensional and highly correlated predictors. Furthermore, we also suggest an iterative algorithm for obtaining a better initial value before implementing partial least squares. For theoretical investigation, we obtain strong consistency and asymptotic normality when the dimension p of predictors is of convergence rate O { n ^1/2/ log ( n )} and o ( n ^1/3) respectively where n is the sample size. When there are no other constraints on the covariance of predictors, the rates n ^1/2 and n ^1/3 are optimal. We also propose a Bayesian information criterion type of criterion to estimate the dimension of the Krylov space in the partial least squares procedure. Illustrative examples with a real data set and comprehensive simulations demonstrate that the method is robust to non-ellipticity and works well even in 'small n –large p ' problems.     

21世纪大学生心理压力探析

本文认为 ,当今大学生的心理压力主要有 3种 :大学生活的压力、个人成长的压力和社会大环境的压力。大学生活的压力包括适应的压力、学业的压力和集体生活的压力 ;个人成长的压力包括人际成长的压力、自我完善的压力、与性和爱情有关的成长压力 ;社会大环境的压力包括就业的压力、社会对人才的高要求压力和经济压力。指出进行压力处理的心理健康教育十分重要。     

跨文化意识的培养：问题与对策

在外语教学活动中，有效地培养学生的跨文化意识，增强学生的跨文化交际能力，既是教育工作者的历史使命，也是外语教学改革的一项重大课题。探索在外语教学中培养学生跨文化意识的主要途径，很有现实意义。     

中国多民族"混居"自治区域权利样态研究

多民族“混居”自治区域的各个民族政治、经济发展不平衡,历史文化也存在差异,对权利的理解和要求必然有所不同。过去我国对多民族“混居”自治区域往往重点关注政治权利的发展,对经济等权利的发展重视不够;同时多强调民族权利的共性,对各民族之间的权利差异有意无意给予回避,导致人们的权利意识发育不良。随着社会的发展,多民族“混居”自治区域的权利意识必定增长,由此也会带来权利资源的严重短缺,并引发各民族之间的权利冲突。多民族“混居”自治区域具有特殊性,其权利也应有其特殊的内容,它关系到民族的发展和国家的繁荣昌盛。