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信息检索过程模型的认知分析 总被引:1,自引:0,他引:1
从认知观点来看,信息检索活动本质上是一种认知活动,信息检索过程就是一种认知过程。在分析Ingw-ersen的多元表示模型、Kuhlthau的六阶段信息检索过程模型等具有代表性的信息检索认知模型的基础上,提出了一个信息检索过程模型,对信息检索活动及相关的知识表示作了认知分析。 相似文献
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对信息检索模型研究的主要内容和构建策略进行了描述,总结了目前存在的几种信息检索模型,分析了它们的优缺点并就存在的问题进行了探讨,总结了信息检索模型的研究现状和发展趋势。 相似文献
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介绍了基于关联规则挖掘的信息检索模型的研究现状,提出一种基于加权正负关联规则挖掘的信息检索系统模型,阐述了该模型的设计思路、各模块的功能及其检索算法,为信息检索研究提供一些新的思路。 相似文献
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基于本体论的个性化信息检索 总被引:1,自引:0,他引:1
传统的网络信息检索存在很多缺陷,导致检索效率低下。提出了一种基于本体论的个性化网络信息检索的模型。该模型的实现可以在一定程度上缓解Internet网上信息过载的问题,提供用户个性化信息检索服务,提高网络信息检索的准确率。 相似文献
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阐述信息检索的概念,简要介绍比较常见的信息检索模型,详细介绍新的信息检索模型——基于量子的交互式信息检索模型。 相似文献
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以信息检索为应用背景,引入Web语义与Agent技术;通过语义Web丰富的描述能力和强大的逻辑推理能力来准确地描述信息资源,以Agent完成用户交互、信息检索、信息过滤、结果返回,构建了一种基于语义Web的信息检索模型,从而满足用户对信息检索的需求。 相似文献
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信息检索发展中的一个重要理论问题是如何对查询与文档进行匹配,由此形成了不同的信息检索模型。跨语言信息检索是信息检索研究的一个分支,也是近年来的热点问题。本文主要对信息检索模型的研究进展,及其在跨语言信息检索中的应用进展进行分析与综述。 相似文献
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本文提出了一个基于语义网的个性化信息检索模型以实现用户的个性化信息检索。文章论述了该模型的模块组成,并对模型的功能模块进行了分析。 相似文献
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A new model for aggregating multiple criteria evaluations for relevance assessment is proposed. An Information Retrieval context is considered, where relevance is modeled as a multidimensional property of documents. The usefulness and effectiveness of such a model are demonstrated by means of a case study on personalized Information Retrieval with multi-criteria relevance. The following criteria are considered to estimate document relevance: aboutness, coverage, appropriateness, and reliability. 相似文献
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李远明王文兵祝方林等 《现代情报》2014,34(2):136-141
良好的信息能力是大学生由接受被动式教育向自主性学习,进而向终身学习转变的必要条件。本文以湖北民族学院2013年春季学期选修过《信息检索》课的普通本科学生为调查样本,测评他们的信息能力及其信息检索行为与习惯,并检验《信息检索》课程效果。研究发现,该校大学生信息能力堪忧,《信息检索》课改空间大。提出实施《信息检索》课改时,尤其应关注教学层面、领导层面、行业指导层面、授课教师权益保障层面等四方面的问题。 相似文献
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《Information processing & management》2016,52(5):840-854
The quality of stemming algorithms is typically measured in two different ways: (i) how accurately they map the variant forms of a word to the same stem; or (ii) how much improvement they bring to Information Retrieval systems. In this article, we evaluate various stemming algorithms, in four languages, in terms of accuracy and in terms of their aid to Information Retrieval. The aim is to assess whether the most accurate stemmers are also the ones that bring the biggest gain in Information Retrieval. Experiments in English, French, Portuguese, and Spanish show that this is not always the case, as stemmers with higher error rates yield better retrieval quality. As a byproduct, we also identified the most accurate stemmers and the best for Information Retrieval purposes. 相似文献
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Qing Li Yuanzhu Peter Chen Sung-Hyon Myaeng Yun Jin Bo-Yeong Kang 《Information processing & management》2009
For historical and cultural reasons, English phases, especially proper nouns and new words, frequently appear in Web pages written primarily in East Asian languages such as Chinese, Korean, and Japanese. Although such English terms and their equivalences in these East Asian languages refer to the same concept, they are often erroneously treated as independent index units in traditional Information Retrieval (IR). This paper describes the degree to which the problem arises in IR and proposes a novel technique to solve it. Our method first extracts English terms from native Web documents in an East Asian language, and then unifies the extracted terms and their equivalences in the native language as one index unit. For Cross-Language Information Retrieval (CLIR), one of the major hindrances to achieving retrieval performance at the level of Mono-Lingual Information Retrieval (MLIR) is the translation of terms in search queries which can not be found in a bilingual dictionary. The Web mining approach proposed in this paper for concept unification of terms in different languages can also be applied to solve this well-known challenge in CLIR. Experimental results based on NTCIR and KT-Set test collections show that the high translation precision of our approach greatly improves performance of both Mono-Lingual and Cross-Language Information Retrieval. 相似文献
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The Multilevel Information System (MLIS), extension of typical Information Retrieval System towards more complete data processing, is discussed. MLIS integrates functions typical for data base management systems and retrieval-oriented systems. Several levels of data accessing are provided, each level developed for a different class of users. End-user level is based on simple query language, trained user level on a relational model, and application programmer level on a Data Manipulation Language nested in high level programming language. The last two levels are discussed in detail. 相似文献