二手学区房价格溢价研究——以重庆市沙坪坝区为例

为了探究小学质量特征以及其他房屋特征对学区内住宅价格的影响,选取重庆市沙坪坝区的16所小学,以及57个小区的1 158个住宅市场数据,利用价格特征模型进行研究.研究结果表明:在控制了房屋特征、楼盘特征和区位特征等的情况下,对数据进行稳健性回归分析,发现重点小学的学区房比普通小学的非学区房的出售价格高出8.3％.     

Missing value imputation method for disaster decision-making using K nearest neighbor

Due to destructiveness of natural disasters, restriction of disaster scenarios and some human causes, missing data usually occur in disaster decision-making problems. In order to estimate missing values of alternatives, this paper focuses on imputing heterogeneous attribute values of disaster based on an improved K nearest neighbor imputation (KNNI) method. Firstly, some definitions of trapezoidal fuzzy numbers (TFNs) are introduced and three types of attributes (i.e. linguistic term sets, intervals and real numbers) are converted to TFNs. Then the correlated degree model is utilized to extract related attributes to form instances that will be used in K nearest neighbor algorithm, and a novel KNNI method merging with correlated degree model is presented. Finally, an illustrative example is given to verify the proposed method and to demonstrate its feasibility and effectiveness.     

农产品网购意愿影响因素及作用机理研究——基于参照效应视角的分析

以整合型科技接受和使用模型(UTAUT)和价值接受模型(VAM)为基础,通过构建参照群体、参考价格、积极在线评论与感知价值、感知风险以及购买意愿之间的关系模型,从参照效应视角实证分析了农产品网购意愿的影响因素及作用机理,并探讨了消费者农产品质量与安全意识在参照效应影响网购意愿中的调节作用.结果表明:参照效应对农产品网购意愿有显著影响;感知价值和感知风险在参照效应影响网购意愿中均发挥了中介作用,但感知价值的中介作用显著大于感知风险;消费者农产品质量与安全意识在参照效应影响网购意愿中部分地发挥了调节效应.其中,对参照群体和积极在线评论的调节效应显著,即网购过程中,消费者越是重视农产品质量与安全,参照群体的意见和积极在线评论对其网购意愿的影响就会越凸显.     

A log rank type test in observational survival studies with stratified sampling

In randomized clinical trials, the log rank test is often used to test the null hypothesis of the equality of treatment-specific survival distributions. In observational studies, however, the ordinary log rank test is no longer guaranteed to be valid. In such studies we must be cautious about potential confounders; that is, the covariates that affect both the treatment assignment and the survival distribution. In this paper, two cases were considered: the first is when it is believed that all the potential confounders are captured in the primary database, and the second case where a substudy is conducted to capture additional confounding covariates. We generalize the augmented inverse probability weighted complete case estimators for treatment-specific survival distribution proposed in Bai et al. (Biometrics 69:830–839, 2013) and develop the log rank type test in both cases. The consistency and double robustness of the proposed test statistics are shown in simulation studies. These statistics are then applied to the data from the observational study that motivated this research.     

从文化语境顺应看外来词翻译中汉语字词的选择

以当代汉语中出现的常用英源外来词为对象,探讨了文化语境顺应在外来词翻译中对汉语字词选择的作用,研究发现外来词翻译的成功与否很大程度上取决于其是否顺应中国文化语境,其中中华民族文化心理、思维方式以及汉字文化意义双层因素对外来词翻译中汉字词的选择有着重要的作用。     

论作者风格和译者风格的和谐

风格的研究是文学翻译研究的重要议题。风格具有可译性,但是要想在一部译作中复制出原作所有的特征绝非易事。翻译的最高境界是使译文的思想内容、文体风格乃至读者感受等诸多方面与原文完全相同。因此,译者在翻译过程中不应该只追求自己的风格,而应该兼顾作者的风格,以达到原作风格和译文风格的和谐统一。     

以服务基层为导向的全科医学人才培养模式的探索

当前,我国基层卫生技术人员队伍建设相对滞后,已经成为制约基层卫生机构发展的瓶颈。医学院校充分发挥人才培养职能,积极探索符合基层医疗服务特点的全科医生培养模式,对推动我国基层医疗卫生服务质量的提高,促进我国医药卫生体制改革的深化具有重要作用。本文对现阶段我国全科医学人才培养中存在的问题进行了分析,介绍了开展全科医学教育的重要意义,并结合辽宁医学院的工作实践,提出了以服务基层为导向的全科医学人才培养的建议和措施。     

减排约束下的中国石油需求预测

针对中国2015年和2020年CO2排放强度减排目标,建立了以CO2强度减排为主要约束,综合考虑经济增长、能源结构以及产业结构等约束的石油需求优化预测模型.预测结果显示:2015年和2020年中国石油需求量分别为5.28亿吨、6.04亿吨,该结果意味着,未来我国石油需求总量仍将有较大幅度的增加,但占一次能源比重有所下降;与其他研究结果比较发现,减排约束对石油需求的增长起到一定的抑制作用;未来中国的石油对外依存度仍将处于较高水平.