医学英语中“计算机网络图式教学模式”的构建

大学医学英语教学改革的一个重要问题就是改革传统的教学模式,建立基于计算机网络的医学英语教学模式.现以图式理论为依据,结合计算机网络的教学手段,从多媒体网络视角探讨"计算机网络图式教学模式",以期对外语教学实践提供新的教学模式和思路.     

The generalized log-gamma mixture model with covariates: local influence and residual analysis

In a sample of censored survival times, the presence of an immune proportion of individuals who are not subject to death, failure or relapse, may be indicated by a relatively high number of individuals with large censored survival times. In this paper the generalized log-gamma model is modified for the possibility that long-term survivors may be present in the data. The model attempts to separately estimate the effects of covariates on the surviving fraction, that is, the proportion of the population for which the event never occurs. The logistic function is used for the regression model of the surviving fraction. Inference for the model parameters is considered via maximum likelihood. Some influence methods, such as the local influence and total local influence of an individual are derived, analyzed and discussed. Finally, a data set from the medical area is analyzed under the log-gamma generalized mixture model. A residual analysis is performed in order to select an appropriate model. The authors would like to thank the editor and referees for their helpful comments. This work was supported by CNPq, Brazil.     

Missing item imputation for quality-of-life instruments with application to asthma quality-of-life questionnaires

There has been increasing use of quality-of-life (QoL) instruments in drug development. Missing item values often occur in QoL data. A common approach to solve this problem is to impute the missing values before scoring. Several imputation procedures, such as imputing with the most correlated item and imputing with a row/column model or an item response model, have been proposed. We examine these procedures using data from two clinical trials, in which the original asthma quality-of-life questionnaire (AQLQ) and the miniAQLQ were used. We propose two modifications to existing procedures: truncating the imputed values to eliminate outliers and using the proportional odds model as the item response model for imputation. We also propose a novel imputation method based on a semi-parametric beta regression so that the imputed value is always in the correct range and illustrate how this approach can easily be implemented in commonly used statistical software. To compare these approaches, we deleted 5% of item values in the data according to three different missingness mechanisms, imputed them using these approaches and compared the imputed values with the true values. Our comparison showed that the row/column-model-based imputation with truncation generally performed better, whereas our new approach had better performance under a number scenarios.     

自助多水平统计模型在代际收入流动研究中的应用

文章首先对代际收入流动的相关文献进行简单回顾,在此基础上运用自助法多水平统计模型对不同年份的CHNS数据进行分析。结果表明在控制了个体属性变量后,农村家庭子女收入受户主收入影响,即表现出一定程度的代际流动性;文章的结果同时表明农村地区代际流动性不存在中部、东部以及西部之间地域上的差别。最后,文章指出研究中的一些不足之处,指出了未来研究方向。     

论公英翻译课的性质与课程模式

本文对公英翻译课的性质与课程模式加以论述。     

基于ASP的在线学习系统的构建

传统的教学由于受时间和空间的限制,越来越满足不了现代社会的终身学习需要,网络教育、远程教育因其具有远距离、实时、交互性强、多媒体化、随时随地学习的特点已成为现代教育最重要的组成部分。     

医疗纠纷可仲裁性的法理思考

在医患矛盾时常发生的今天,探求解决医疗纠纷的机制已经成为必要。针对医疗纠纷的可仲裁性展开法理分析,通过对国外医疗纠纷仲裁机制的考察,分析医疗纠纷仲裁的特殊功能,论证其可仲裁性,显得尤其重要。在我国立法现状的基础上,提出我国医疗纠纷可仲裁性采用一般模式的建议,具有一定的现实意义。     

自贡盐业契约“出山约”与“出丢上中下节约”研究

在清代民国时期,四川自贡井盐生产过程中出现了“出山约”、“上、中、下节约”等特殊契约形式,导致这种契约形式出现的原因是多方面的,其中自然环境、盐井开采技术以及市场竞争是导致这些契约关系出现的重要原因。这些契约形式的出现对当时自贡地区盐业生产产生了极大的影响,有效地解决了投资者与地主之间的矛盾,保证了井盐开采所需资金来源,分散了投资风险,优化了盐井生产组织形式,提升了投资的积极性,从而使自贡地区的井盐生产能形成独特的生产模式,长盛不衰。     

村治模式转型：由封闭性自治到开放性自治的演进

村民自治模式具有封闭性自治的特点。在现代化进程的强烈冲击下,农村社会已经发生历史性变迁,农村社会逐步走向开放性与异质性,村民自治赖以存在的经济与社会基础逐步瓦解。农村经济与社会变迁的既有现实决定了必须建立适应当前农村社会开放性、流动性社会要求的新型自治实践模式。由“开放性自治”到“封闭性自治”的转型是农村基层民主发展的演进逻辑。     

移动互联网商业模式探讨

随着互联网技术与移动通信技术的不断发展和融合,以及人们手持移动终端设备(如手机、PDA、MID等)的大量普及,移动互联网的应用已经是大势所趋。移动互联网给电信业带来新的发展机会,也为移动增值业务创造了全新的商业运作模式,即“终端+服务”一体化商业模式、“软件服务化”商业模式、广告商业模式、电信与广电双网运营商业模式、FON类商业模式、传统移动增值商业模式等六类。