0-3岁婴幼儿亲子阅读中亲子互动策略优化的行动研究

基于 0-3 岁婴幼儿亲子阅读互动现状调查发现的家长互动经验缺乏、形式单一等问题,开展“计划—行动—观察—反思—再计划”三轮亲子阅读互动循环提升的行动研究。实践表明,创设情境多元互动、拓展经验促成互动、审美体验美化互动是提升阅读互动质量的有效策略;家长对婴幼儿身心发展特点和教育规律的认知、对美的鉴赏与表达能力是影响互动策略实施的重要因素;专家的精心指导和及时评价、家庭间的作品展示和体会交流是营造阅读互动氛围提升互动效果的良好举措。建议家长自主学习、积极实践、主动交流来推进有效互动策略的实施。     

海报设计的竞争优势及发展趋向

海报设计在长达一个多世纪的发展过程中,经历了不断的发展和演变,形成了独特的风格和特点。文章主要分析了海报在当代社会的存在状况以及竞争优势;论述了海报设计作为一种设计艺术形态,在全球一体化的社会环境中蕴涵着个人化、艺术化以及多元化的发展趋势。     

中英文医学科研论文摘要的比较研究

目的：探讨和对比中英文医学科研论文摘要部分所存在的差异。方法：通过自身写作及阅读大量的中英文参考文献,对比、分析其摘要的基本结构、基本内容和写作要求,比较中英文医学科研论文的基本结构、基本内容的描述及人称代词的使用等方面的内容。结果：中英文医学科研论文摘要部分在基本结构、基本内容的描述以及人称代词的使用方面存在很大的差异。结论：中英文医学科研论文的摘要部分写作要求不完全相同,提示作者在进行中英文医学科研论文写作时,应根据中英文期刊的具体要求进行有针对性的写作,以提高论文录用率。     

形成性评估与大学生课外英语自主学习

大学生具有较强的课外英语自主学习意识,但并未都转化为相应的课外英语自主学习行为。高质量的形成性评估可以促进大学生课外自主学习意识向自主学习行为的迁徙,提高大学生的英语自主学习能力。     

Double Sampling Ratio-product Estimator of a Finite Population Mean in Sample Surveys

It is well known that two-phase (or double) sampling is of significant use in practice when the population parameter(s) (say, population mean X¯) of the auxiliary variate x is not known. Keeping this in view, we have suggested a class of ratio-product estimators in two-phase sampling with its properties. The asymptotically optimum estimators (AOEs) in the class are identified in two different cases with their variances. Conditions for the proposed estimator to be more efficient than the two-phase sampling ratio, product and mean per unit estimator are investigated. Comparison with single phase sampling is also discussed. An empirical study is carried out to demonstrate the efficiency of the suggested estimator over conventional estimators.     

2012年中国民族法学研究述评

2012年中国民族法学研究成果颇丰。其中,论文约有320余篇,比2011年增加了100余篇。这些研究在内容上有以下特点：一是内容较为全面,其中,民族习惯法、民族司法的研究比往年增多,民族政治权利成为年度重要话题;二是内容上的交叉研究增多;三是出现了一些综述性、反思性研究成果;四是关注了一些热点事件和话题;五是应用性研究成果较多。这些研究在方法上有以下特点：一是研究视角的多元化,协商民主成为年度新话题;二是注重实证研究;三是注重比较研究。在全面梳理的基础上,笔者根据研究内容所涉及的民族法学基本理论、民族权利保护、民族区域自治、民族法制建设、民族习惯法、民族法制史、民族司法等方面分别对其主要成果进行了介绍与评价,在辨别良莠、展示精华的同时,为不断繁荣中国民族法学提供可借鉴的年度综合性史料。     

区域主导产业评价指标与数学模型

以现有研究成果为基础,建立了区域主导产业评价指标体系;基于灰色聚类的思想,提出了评价区域主导产业优度的数学模型-定权聚类评估模型,并对河南省武陟县工业主导产业选择进行了实证研究。     

《高等代数》教程之我见

《高等代数》是一门普遍让学生感到头疼的课,这与所用教材的教程有一定关系,本文就目前所用的教材提出了一种较为适宜的教程,并论述了实施它的可能性与有利因素.     

Using quantile averages in matched observational studies

In two observational studies, one investigating the effects of minimum wage laws on employment and the other of the effects of exposures to lead, an estimated treatment effect's sensitivity to hidden bias is examined. The estimate uses the combined quantile averages that were introduced in 1981 by B. M. Brown as simple, efficient, robust estimates of location admitting both exact and approximate confidence intervals and significance tests. Closely related to Gastwirth's estimate and Tukey's trimean, the combined quantile average has asymptotic efficiency for normal data that is comparable with that of a 15% trimmed mean, and higher efficiency than the trimean, but it has resistance to extreme observations or breakdown comparable with that of the trimean and better than the 15% trimmed mean. Combined quantile averages provide consistent estimates of an additive treatment effect in a matched randomized experiment. Sensitivity analyses are discussed for combined quantile averages when used in a matched observational study in which treatments are not randomly assigned. In a sensitivity analysis in an observational study, subjects are assumed to differ with respect to an unobserved covariate that was not adequately controlled by the matching, so that treatments are assigned within pairs with probabilities that are unequal and unknown. The sensitivity analysis proposed here uses significance levels, point estimates and confidence intervals based on combined quantile averages and examines how these inferences change under a range of assumptions about biases due to an unobserved covariate. The procedures are applied in the studies of minimum wage laws and exposures to lead. The first example is also used to illustrate sensitivity analysis with an instrumental variable.     

The zero-inflated Poisson model and the decayed, missing and filled teeth index in dental epidemiology

For frequency counts, the situation of extra zeros often arises in biomedical applications. This is demonstrated with count data from a dental epidemiological study in Belo Horizonte (the Belo Horizonte caries prevention study) which evaluated various programmes for reducing caries. Extra zeros, however, violate the variance–mean relationship of the Poisson error structure. This extra-Poisson variation can easily be explained by a special mixture model, the zero-inflated Poisson (ZIP) model. On the basis of the ZIP model, a graphical device is presented which not only summarizes the mixing distribution but also provides visual information about the overall mean. This device can be exploited to evaluate and compare various groups. Ways are discussed to include covariates and to develop an extension of the conventional Poisson regression. Finally, a method to evaluate intervention effects on the basis of the ZIP regression model is described and applied to the data of the Belo Horizonte caries prevention study.