共查询到19条相似文献，搜索用时 171 毫秒
1.
中刊库检索效率及其影响因素比较分析 总被引：5，自引：0，他引：5
Based on the retrieval function of the Chinese Journal Database and the China Journal Net Bibliography and Abstract Database, the article analyzes the retrieval results of the two databases and their influence factors for the same retrieval missions. The article also discusses how to construct and evaluate a database. 相似文献
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网络信息分类检索问题研究 总被引：4，自引：0，他引：4
This paper studies network information classification retrieval from the theory of information management. With a brief introduction to search engines, it focuses on analyzing the characteristics of network documents and their classification system. Problems in network document classification are pointed out. Suggestions such as constructing a catalog classification search engine system are made. 相似文献
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论自然语言检索 总被引：8，自引：1，他引：8
With its advantages in information retrieval, such as simple in indexing and convenient in information re-trieval, natural language is now widely used in idonnafion retrieval and network retrieval. However, due to some charac-teristics of the natural language itself, its retrieval result is usually tmsafisfactory. This paper sumamrizes several main fac-tots that restrict natural language retrieval and introduces a concept space method to improve its retrieval efficiency. 相似文献
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万维网上的全文检索技术及其发展 总被引：6，自引：2，他引：4
The conception and characteristics of full text retrieval are expounded. The basic structure and key technologies of a full text retrieval system on WWW are put forward. According to the development direction of intelligent information retrieval, the author discusses three approaches of combining artificial intelligence with information retrieval. 相似文献
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With the globalization of the world, language teaching becomes more important than ever before, and many universities and classroom teachers are active to exploret he most efficient and effective methodology to teach languages to achieve a desirable result. When they seek to improve the quality of language teaching, they often research teaching methodologies by referring to general theories about language and language learning. Theoretical bases and teachers‘ hands-out experience have informed methodologies of language teaching, and methods of language teaching have been improved with the developments about linguistics, psychology and education. But there is a question which extent the information that theory has made available can be used to explore language teaching methodology and of the relevance of theory to language teaching methodology. 相似文献
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CA光盘版检索方法与技巧 总被引：1，自引：0，他引：1
Chemical Abstracts (CA) is widely used all over the world. In this article, the methods and skills of retrieving CA on CD are studied. Methods of combining CA on CD retrieval with Dialog online retrieval are also described. 相似文献
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多约束条件下检索组合模型的应用 总被引：2，自引：0，他引：2
With an analysis of the main document databases, this paper discusses the combined retrieval models used under the multi-restrictive conditions by use of the conditional probability theory. The paper provides system programmers with combined probability theory and its application examples. It's useful for users to increase recall ratio, pertinency ratio and search rate. 相似文献
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Yang Chun yan 《科教文汇》2006,(4)
Ⅰ.Introduction For a number of years, the teaching of vocabulary was neg- lected in language teaching. For much of this century, the prin- cipal focus of language teaching has been on the grammar of the language. But recently, the status of vocabulary ha… 相似文献
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全文检索研究 总被引：11，自引：0，他引：11
A new algorithm for automatic segmentation of Chinese word with the stop word list and post-controlled thesaurus, that has absorbed the ideas from the single-Chinese character method and the thesaurus method, is given. Based on this algorithm, a new full text retrieval mode is built. 相似文献
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文章强调了文献检索课内容基础理论创新的必要性及意义。提出和阐述了该课程内容设置的基础理论-文献检索；直接检索与间接检索的科学性，并举实例说明了这一理论在教学内容设计中的实际运用。 相似文献
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现代信息技术正对传统的文献检索课程目标、教学内容、教学方式和评价产生深刻的变革和影响。计算机辅助教学已经不能完全覆盖信息技术对信息素养教育所产生的影响。信息技术与课程整合正开辟了一个崭新的研究领域和实践空间。因此,本文探讨了信息技术与文献检索课整合的含义、层次和整合点,旨在在新技术条件下从文检课的教与学方式、教学结构方面探索教学改革的新思路。 相似文献
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目前大多数机器翻译和跨语言检索系统都是基于通用语料,对外文科技资料的翻译效果不理想,本文结合科技文献的加工方法,研究面向科技文献的跨语言信息检索系统的模型。首先对跨语言信息检索的概念和特点进行简单的概述,从3个角度介绍跨语言信息检索的研究方法,然后讨论构建跨语言信息检索系统的必要性,在此基础上设计出一个面向科技文献的跨语言信息检索系统模型以及主要功能结构。 相似文献
16.
自然语言在Pubmed检索系统中的应用 总被引：4，自引：0，他引：4
自然语言检索是情报检索的发展趋势。Pubmed检索系统通过自然语言自动转换及截词检索、词组的自动识别及特定符号的使用、限定检索范围、Preview/Index等功能，有效地克服了自然语言检索的局限，提高了检索效率。 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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关于研究生医学文献检索课的改革与思考 总被引：9，自引：0，他引：9
本文分析了信息时代研究生医学文献检索课教学存在的问题，探讨了研究生文检课的改革和发展。指出研究生文献检索课是研究生素质教育的重要组成部分，并根据多年年的教学实践，对于课时数较少的普通医学院校，如何调整文检课教学内容，加强计算机检索课教学，从方法、方式上进行了讨论，并对今后研究生医学文献检索课的发展，提出自己的看法及建议。 相似文献