农地经营权流转与宁夏生态移民发展研究

笔者通过对宁夏生态移民迁入地发展滞后的现状分析,发现农地建设与经营成本负担是制约生态移民迁入地发展的主因。根据制度变迁理论,结合十七届三中全会决议,文章探讨了生态移民农地经营权流转制度,提出采取“农地收购”、“招募式移民安置与农地产业化经营模式”是解决当前农地短缺和生态移民发展问题的有效途径。     

美国学者的“政治文化”概念、意义及其争论

“政治文化”作为现代政治学的重要概念,自从阿尔蒙德在20世纪50年代提出以来,受到了诸多美国学者的重视与争论。在阅读半个世纪以来的美国学者有关“政治文化”重要文献的基础上,文章作者梳理了“政治文化”概念的本意及其相关的争议,分析了政治文化概念的重要意义,认为该概念的意义不仅在于它具有重要的解释功能,还在于它是一种重要的比较研究的路径,同时文章述评了围绕政治文化概念与作用的相关争论与批评,以期推动对中国政治文化的研究。     

特色与瑕疵——《新编汉英翻译教程》评析

作为普通高等教育"十五"国家级规划教材新世纪高等院校英语专业本科生系列教材之一,陈宏薇教授主编的<新编汉英翻译教程>彰显了鲜明的文化特色,渗透了当代翻译理论,体现了传统与当代翻译研究的有机结合,且练习形式多样化.该教程既有自己的特色,同时也存在不足之处,以此为鉴可以进一步改进教材编写工作.     

当代电视发展视角的都市审美文化及其世俗化特征

在当代特定的经济环境和社会背景下,审美文化,尤其以都市审美文化为代表,开始了从理想主义向世俗化的转变。以电视这一当代重要媒介的发展为视角,从电视剧、电视娱乐节目、电视广告和电视的技术优势四个方面详细分析了都市审美文化世俗化特征的具体表现,从而对我国审美文化的健康发展提供理论上的指导和帮助。     

土地流转、资本兼并与扩大内需

立足于我国“三农”问题的根源性问题——土地问题,关注党的十七届三中全会提出的土地经营权流转问题,分析土地经营权流转的意义,主要在于土地、资本、劳动这三个基本生产要素的激活,盘活土地资源,引入非农资本,释放劳动力资源。同时,在土地流转过程中要警惕资本兼并问题;要循序渐进,谨慎推进土地流转。     

我国研究生培养机制改革下“三助”成本分担研究

随着我国研究生教育规模不断扩大,有限的高等教育公共财政资源日趋紧张.在高校研究生培养机制改革的背景下,分析了研究生"三助"工作的现状,探讨了研究生"三助"成本分担中导师对助研劳酬的分担、学院和任课教师对助教劳酬的分担、学校行政部门对助管劳酬的分担以及社会和企业的成本分担问题,并提出了相应的对策.     

目的论关照下的商务翻译

首先探讨了商务翻译译文中存在的各种问题,并由此引出解决问题的方法,即在目的论的关照下进行商务翻译.随后,分别讨论了在目的论的关照下如何解决商务广告、商务信函、说明书、公司简介、外贸合同等商务文本的翻译问题.     

Optimum covariate designs in partially balanced incomplete block (PBIB) design set-ups

The use of covariates in block designs is necessary when the covariates cannot be controlled like the blocking factor in the experiment. In this paper, we consider the situation where there is some flexibility for selection in the values of the covariates. The choice of values of the covariates for a given block design attaining minimum variance for estimation of each of the parameters has attracted attention in recent times. Optimum covariate designs in simple set-ups such as completely randomised design (CRD), randomised block design (RBD) and some series of balanced incomplete block design (BIBD) have already been considered. In this paper, optimum covariate designs have been considered for the more complex set-ups of different partially balanced incomplete block (PBIB) designs, which are popular among practitioners. The optimum covariate designs depend much on the methods of construction of the basic PBIB designs. Different combinatorial arrangements and tools such as orthogonal arrays, Hadamard matrices and different kinds of products of matrices viz. Khatri–Rao product, Kronecker product have been conveniently used to construct optimum covariate designs with as many covariates as possible.     

Analysis of supersaturated designs via the Dantzig selector

A supersaturated design is a design whose run size is not enough for estimating all the main effects. It is commonly used in screening experiments, where the goals are to identify sparse and dominant active factors with low cost. In this paper, we study a variable selection method via the Dantzig selector, proposed by Candes and Tao [2007. The Dantzig selector: statistical estimation when p$p$ is much larger than n$n$. Annals of Statistics 35, 2313–2351], to screen important effects. A graphical procedure and an automated procedure are suggested to accompany with the method. Simulation shows that this method performs well compared to existing methods in the literature and is more efficient at estimating the model size.     

Inference of non-centrality parameter of a truncated non-central chi-squared distribution

Non-central chi-squared distribution plays a vital role in statistical testing procedures. Estimation of the non-centrality parameter provides valuable information for the power calculation of the associated test. We are interested in the statistical inference property of the non-centrality parameter estimate based on one observation (usually a summary statistic) from a truncated chi-squared distribution. This work is motivated by the application of the flexible two-stage design in case–control studies, where the sample size needed for the second stage of a two-stage study can be determined adaptively by the results of the first stage. We first study the moment estimate for the truncated distribution and prove its existence, uniqueness, and inadmissibility and convergence properties. We then define a new class of estimates that includes the moment estimate as a special case. Among this class of estimates, we recommend to use one member that outperforms the moment estimate in a wide range of scenarios. We also present two methods for constructing confidence intervals. Simulation studies are conducted to evaluate the performance of the proposed point and interval estimates.