衔接方式在大学英语写作中应用的实证研究

语言学家及研究者普遍认为,衔接是创建连贯英语语篇不可或缺的部分.以韩礼德的衔接理论为依据,以南昌某大学随意抽取的分属不同年级的120名非英语专业的学生为研究对象,以他们按照国家大学英语四级考试要求所写的作文中使用的衔接手段、存在的衔接问题(包括衔接手段的错误使用及使用不当等)及问卷调查结果为语料,并借助统计软件SPSS,探讨衔接手段的使用与写作质量之间的关系、不同年级学生作文中衔接手段的频度分布状况及不同年级学生衔接手段的运用特点.同时分析学生作文中衔接问题产生的原因,并提出一些建议,以期有助于改进大学英语写作教学,提高教学效果.     

Accounting for income distribution trends: A density function decomposition approach

This paper develops methods for decomposing changes in the income distribution using subgroup decompositions of the income density function. Overall changes are related to changes in subgroup shares and changes in subgroup densities, where the latter are broken down further using elementary transformations of individual incomes. These density decompositions are analogous to the widely-used decompositions of inequality indices by population subgroup, except that they summarize multiple features of the income distribution (using graphs), rather than focusing on a specific feature such as dispersion, and are not dependent on the choice of a specific summary index. Nonetheless, since inequality and poverty indices can be expressed as PDF functionals, our density-based methods can also be used to provide numerical decompositions of these. An application of the methods reveals the multi-faceted nature of UK income distribution trends during the 1980s.     

Abel群中阶为定数的元素的个数

本文主要给出了Abel群中阶为定数的元素的个数的一个公式,完全解决了有限生成Abel群中l阶元的个数的计算以及存在l阶元的条件。     

关下模n剩余类加群的性质应用的一点注记

本文讨论了应用模n剩余类加群的性质求解模n剩余类加群的子群结构和数量问题.     

关子Fuzzy群上的正规Fuzzy子群的一个注记

在[1]中吴望名教授首先提出了 Fuzzy 群上的正规 Fuzzy 子群的概念。本文讨论了它的几个性质,其中命题3及例指出了它与群 G 的正规 Fuzzy 子群两者之间的区别与联系.     

大学日语教学转换课程建设调查分析

在开始学习专业日语时,大学生都有不能立即适应的感觉.通过对沈阳药科大学在校学生和专业日语课任课教师进行问卷调查结果分析发现,在大学基础日语教学阶段后期进行“衔接性日语教学”,在教学内容方面,在继续学习提高基础日语的同时,增加“值日报告”和学习日语科普内容;在教学方法方面,综合采取认知法和任务教学法,构建合作学习模式和参与式教学模式;在教学评估方面,采取形成性评估和终结性评估相结合的形式.     

中国社会科学研究的多重基金资助分析

以SSCI来源期刊为统计源,对一类多重资助(联合资助、共同资助、多次资助和重复资助)问题进行研究,根据SSCI收录中国社科论文标注的基金资助数据,建立了基金多重资助关联网络,讨论了基金多重资助的强度和关联系数,并采用SNA和多元统计分析方法,分析了多重基金资助的凝聚子群分布和基金多重资助关联网络的结构分布与多维尺度分布。中国社会科学基金论文中已有61.1%为多重资助,并形成了以国家自然科学基金为核心的多重资助中心。可以认为,提倡科学研究中的合作基金、持续资助,提高项目申报信息流畅和申报人员的科学素养,是提高基金资助资源利用程度的有效途径。     

Sensitivity analyses for the principal ignorability assumption using multiple imputation

In the context of clinical trials, there is interest in the treatment effect for subpopulations of patients defined by intercurrent events, namely disease-related events occurring after treatment initiation that affect either the interpretation or the existence of endpoints. With the principal stratum strategy, the ICH E9(R1) guideline introduces a formal framework in drug development for defining treatment effects in such subpopulations. Statistical estimation of the treatment effect can be performed based on the principal ignorability assumption using multiple imputation approaches. Principal ignorability is a conditional independence assumption that cannot be directly verified; therefore, it is crucial to evaluate the robustness of results to deviations from this assumption. As a sensitivity analysis, we propose a joint model that multiply imputes the principal stratum membership and the outcome variable while allowing different levels of violation of the principal ignorability assumption. We illustrate with a simulation study that the joint imputation model-based approaches are superior to naive subpopulation analyses. Motivated by an oncology clinical trial, we implement the sensitivity analysis on a time-to-event outcome to assess the treatment effect in the subpopulation of patients who discontinued due to adverse events using a synthetic dataset. Finally, we explore the potential usage and provide interpretation of such analyses in clinical settings, as well as possible extension of such models in more general cases.     

现代汉语“别说”的篇章衔接功能及其语法化

基于2 633余万字的现代汉语平衡语料库,对现代汉语中词语"别说"的分化及"别说"句进行了定量与定性的描写分析.主要区分了"别说"的三种语义类型,重点研究了语法化后的功能性话语标记语"别说2"和关联词语"别说3"的篇章衔接功能,并追溯了"别说"的历时语法化过程.