A relevance feedback mechanism for cluster-based retrieval

Contextual document clustering is a novel approach which uses information theoretic measures to cluster semantically related documents bound together by an implicit set of concepts or themes of narrow specificity. It facilitates cluster-based retrieval by assessing the similarity between a query and the cluster themes’ probability distribution. In this paper, we assess a relevance feedback mechanism, based on query refinement, that modifies the query’s probability distribution using a small number of documents that have been judged relevant to the query. We demonstrate that by providing only one relevance judgment, a performance improvement of 33% was obtained.     

日本初中体育《学习指导要领》的修改及其特征

修改后的日本初中学校体育《学习指导要领》在体育课程目标、体育课程水平目标和体育课程运动项目内容方面都有所变化。这种变化呈现三大特征:一是科学性更强;二是指导性更强;三是适用性更强。     

基于LOD的关联参考服务构建研究

分析总结基于关联开放数据(LOD)构建关联参考服务的关键技术和方法,包括关联模型、关联数据获取、实体数据融汇。介绍关联参考服务相关的典型应用,并提出关联参考服务应用面临的关键问题。     

基于相关性判据的学术信息检索系统成功模型建构

基于相关性判据研究成果、学术信息检索系统特征调研成果、信息系统成功模型(ISSM)以及TEDS模型构建面向相关性判据的学术信息检索系统成功模型,对模型中的关系进行简要分析,并提出研究假设。     

Enhancing query translation with relevance feedback in translingual information retrieval

As an effective technique for improving retrieval effectiveness, relevance feedback (RF) has been widely studied in both monolingual and translingual information retrieval (TLIR). The studies of RF in TLIR have been focused on query expansion (QE), in which queries are reformulated before and/or after they are translated. However, RF in TLIR actually not only can help select better query terms, but also can enhance query translation by adjusting translation probabilities and even resolving some out-of-vocabulary terms. In this paper, we propose a novel relevance feedback method called translation enhancement (TE), which uses the extracted translation relationships from relevant documents to revise the translation probabilities of query terms and to identify extra available translation alternatives so that the translated queries are more tuned to the current search. We studied TE using pseudo-relevance feedback (PRF) and interactive relevance feedback (IRF). Our results show that TE can significantly improve TLIR with both types of relevance feedback methods, and that the improvement is comparable to that of query expansion. More importantly, the effects of translation enhancement and query expansion are complementary. Their integration can produce further improvement, and makes TLIR more robust for a variety of queries.     

智障教育课堂指导语运用探析

智障教育课堂教学中,指导语作为师生信息交换的中介,对于课堂教学的有效实施起着桥梁的作用。智障教育课堂实践中,对于如何恰当使用指导语存在着三个误区：＂不清晰＂＂无指向＂和＂不存在＂。要消除指导语使用的误区,需要明晰智障教育学校指导语的四种功能,即导向功能、反馈功能、强化功能和调节功能;正确把握指导语运用的四个原则：稳定性原则、准确性原则、简洁性原则和差异性原则;提高指导语运用的水平需要教师准确把握课程,细致了解学生,并建立反思习惯。     

从关联理论探讨产品说明翻译的效度

根据关联理论,产品说明翻译是动态的明示---推理过程,建立最佳关联是译者追求的目标。产品说明翻译效度受认知语境的影响,但取决于相关因素的趋同度。提高产品说明翻译应遵循3C原则,力求从信息、语言、文化三个方面寻求最佳关联。     

关联理论在翻译中的应用--以《雾都孤儿》之荣译本和何译本为例

从关联理论的角度看,翻译本质上也是一种交际行为。译者的责任是努力做到使原文作者的意图与译文读者的企盼相吻合,力争实现最佳关联。可是,在翻译实践中往往会存在些许翻译交际失败的情况。文章认为在翻译过程中,由于交际环境发生巨大变化而引起的关联性缺失是导致翻译交际失败的原因,具体表现在信息意图与交际意图的分离、语境假设的耗损与取消和语境含意的流失三个方面。选用《雾都孤儿》的荣如德译本和何文安译本作为研究对象,探讨在翻译的过程中应该如何重构关联,使交际在跨语言跨文化环境中得以顺利进行。     

关联理论与跨文化交际会话含义的理解

Sperber&Wilson的关联理论将交际看作一种认知活动,试图从人的认知特点和过程出发,揭示交际规律。关联理论使跨文化交际中的语用会话含意推导摆脱了Grice合作原则的束缚,也从认知的角度探讨了礼貌现象,为跨文化交际中话语的理解提供了新的理论依据,有助于解释跨文化语言交际活动中出现的语用失误与交际失败现象。     

关于数学分析课程中思想方法的教学

通过教学案例说明怎样进行思想方法教学,以促进本科数学专业数学分析的教学与研究.