不同学年医学生的心理特点及教育

处在不同阶段的医学生有着不同的心理特点。作为思想政治辅导员,应根据医学院校的实际情况作出及时的分析与把握,从而培养出祖国需要的医学人才。对于初年级同学,主要是帮助其适应大学生活;对于中年级同学,主要是引导其不断完善自己,提高自主能力与实践能力;而对于实习毕业年级,则应该加强他们的择业就业心理辅导。     

走出电子游戏的“概念化”误区

目前我国电子游戏业所面临的问题是,市场上充斥着大量模式单一、缺乏内涵的作品,在看似繁荣的游戏事业表象下,隐藏着巨大的发展危机。这一危机带来的不良后果使大批的青少年沉迷于虚幻的网络世界而不能自拔,并且严重阻碍了电子游戏事业自身的发展。对待这些问题,既不能简单的围追堵截,也不能置之不管任由其恶化．而应该以长远的眼光重新去审视这一现象的根本问题所在,寻找有效可行的解决办法。针对某些游戏从业者所持有的错误观点,试图从电子游戏美学角度去诠释制约电子游戏发展的几点观念上的问题。     

论高校阳光辅导员的培育

新时期高校辅导员要象阳光般充满朝气和活力,才能焕发青年大学生求知的激情,进取的意识,创新的精神。高校阳光辅导员要有适应高校学生教育管理的诸多时代特点,才能在高校学生教育管理和学生成长成才中发挥积极的作用。选拔和培养好新时期高校阳光辅导员,是提升高校的办学水平和提高人才培养质量重要方面。     

新时期社会转型的中国经验——新时期社会转型与和谐社会构建问题战略层面上的比较价值

中国新时期社会转型与和谐社会构建问题,是中国经济社会发展进程中提出和探索的具有全局性、战略性的双重命题,是对我国现代社会发展规律的基本认识,也是对中国改革与发展进程的一种新的理解.这双重命题必须同时上升为执政党和政府的时代性理念,必须置于中国特色社会主义这一"核心主题"的主流分析框架之下;必须从同等程度意义上,上升为执政党和政府的战略性决策层面;改革开放30年的今天,迫切需要分析中国特色社会主义的现代社会转型与和谐社会构建的内在联系;必须从真理性与价值性之统一的角度解析中国特色的现代社会转型与和谐社会构建问题双重命题的同等程度范畴的现实价值.     

Using relative utility curves to evaluate risk prediction

Summary.  Because many medical decisions are based on risk prediction models that are constructed from medical history and results of tests, the evaluation of these prediction models is important. This paper makes five contributions to this evaluation: the relative utility curve which gauges the potential for better prediction in terms of utilities, without the need for a reference level for one utility, while providing a sensitivity analysis for misspecification of utilities, the relevant region, which is the set of values of prediction performance that are consistent with the recommended treatment status in the absence of prediction, the test threshold, which is the minimum number of tests that would be traded for a true positive prediction in order for the expected utility to be non-negative, the evaluation of two-stage predictions that reduce test costs and connections between various measures of performance of prediction. An application involving the risk of cardiovascular disease is discussed.     

Confidence interval estimation of the difference between paired AUCs based on combined biomarkers

In many diagnostic studies, multiple diagnostic tests are performed on each subject or multiple disease markers are available. Commonly, the information should be combined to improve the diagnostic accuracy. We consider the problem of comparing the discriminatory abilities between two groups of biomarkers. Specifically, this article focuses on confidence interval estimation of the difference between paired AUCs based on optimally combined markers under the assumption of multivariate normality. Simulation studies demonstrate that the proposed generalized variable approach provides confidence intervals with satisfying coverage probabilities at finite sample sizes. The proposed method can also easily provide P-values for hypothesis testing. Application to analysis of a subset of data from a study on coronary heart disease illustrates the utility of the method in practice.     

青藏高原特色农业国际竞争力评价指标体系的构建

基于农业国际竞争力评价指标体系相关文献回顾的基础上,从国内比较优势指标、显示性指标、解释性指标和实体性指标四个方面提出了青藏高原特色农业国际竞争力的评价标准,建立了包括4个一级指标、12个二级指标和24个三级指标的特色农业国际竞争力的评价指标体系,以期为进一步研究青藏高原特色农业发展提供参考.     

Combined asymmetric spatial weights matrix with application to housing prices

In this study, a combined asymmetric spatial weights matrix is proposed for capturing the unequal spatial dependence of housing prices, where the advantage of this matrix was demonstrated by a non-nested hypothesis test. To explore the heterogeneous spatial impacts of urban essential characteristics on housing prices over the eastern, central, and western regions of China, after the Lagrange multiplier and likelihood ratio tests, the spatial Durbin model using the proposed weights matrix was applied to each region. The estimation results showed that the direct impacts of college and new employment were significantly negative in the eastern region, but not significant in the central and western regions. By contrast, the direct impacts of hospitals and scenic spots were significantly positive in eastern China, but not significant in central and western China. In addition, the indirect impacts of the four variables were not significant in the three regions. These results suggest that in eastern China, the government may increase the requirements for using medical resources and close tourist attractions in a single city to cool down the skyrocketing housing prices in this area.