共查询到20条相似文献,搜索用时 156 毫秒
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Problems of zero-output and over-output in a full text retrieval system are discussed. Methods of how to solve these problems are described. 相似文献
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学科交叉与信息自动检索--科学发展呼唤新的信息自动检索工具 总被引:4,自引:0,他引:4
The intercrossing of disciphnes is an important impetus of scientific development. The existing automatic information retrieval systems are not propitious for the generation of new ideas and the interdisciplinary multiplication as they are developing towards more intelligent, knowledgeable and specialized ones. The scientific development calls for a new automatic information retrieval tool. The research will be a comprehensive subject involved with many disciplines and rields, and need to be conducted in order and step by step. 相似文献
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从信息资源的分类看搜索引擎的优化 总被引:1,自引:0,他引:1
The traditional infon-nation resources are classified according to scientificness and practicality. However,the classification of Internet information resources pays more attention to practicality while paying equal attention to scien-tificness. This article, starting from the classification methods of the traditional information resources and Intemet informs-lion resources, discusses how to optimize the search engines in classified catalogue retrieval and multiple keyword retrieval. 相似文献
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两种全文信息检索系统的比较研究 总被引:4,自引:0,他引:4
The paper compares two kinds of full text retrieval systems,that is, For-search system and TRS system,and analyzes their differences and similarities in structure and function. 相似文献
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用户情报检索机制的历时性分析研究 总被引:5,自引:0,他引:5
The paper analyzes the information retrieval mechanism with diachrony method, divides information retrieval process into four circumstances, that is, information need, infomnation want, information demand and retrieval, and information assimilation and use, and based on Brooks Equation, goes further into details of information retrieval mechanism. 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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网络文本数据搜索引擎与搜索技术 总被引:3,自引:0,他引:3
This paper describes the functions, characteristics and operating principles of search engines based on Web text, and the searching and data mining technologies for Web-based text information. Methods of computer-aided text clustering and abstacting are also given. Finally, it gives some guidelines for the assessment of searching quality. 相似文献
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基于WWW的全文数据库信息服务系统的设计与实现 总被引:4,自引:0,他引:4
With the development of information service industry, establishing the full text database information ser-vice system based on WWW has become a trend. This article introduces a kind of this system, elucidating the technolgies and methods that can be used in the design of this system in detail. Finally, an example is given. 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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通过建设双层PDF全文数据库、创建索引和全文检索等实现过程来阐述相关技术的研究和运用。以建设全文数据库为基础,研究结构化信息与非结构化数据的合并管理,对目录数据和全文数据的同步索引,基于Lucene技术,实现档案管理系统的一站式智能化档案全文检索,提升档案查全率。 相似文献
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知识检索过程必须借助于语言工具来实现,这一过程在用户同系统知识库的交互中,表现为知识→语言→知识→……的互相转换过程。在知识检索中普遍存在语境支持等语用现象,这些现象尤其集中存在于人机交互的检索界面,而其中的锚文本等及其分布构成了检索交流中重要的语境支持信息。知识检索系统界面的语用设计直接决定了系统检索的成效。系统界面及锚文本的语用设计的基本要求包括语境充分和整体优化等。 相似文献
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基于WWW的全文检索系统检索性能探讨 总被引:9,自引:2,他引:9
本文以美国UMI公司开发的ProQuestDirect全文检索系统以及EBSCO公司开发的EBSCOhost全文检索系统为例,探讨了基于WWW的全文检索系统在检索语言、用户界面、检索功能等方面的性能。 相似文献
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基于科技文献检索的信息发现与信息检索,探讨VIP、CNKI、万方数据知识服务平台系统功能在课题检索中的应用。在信息发现方面,综合运用各数据库系统功能寻找检索概念的同义词、课题相关的分类号和所属学科类别、抽象检索概念的相关词、课题相关的研究机构和研究者。在信息检索方面,根据各系统的功能特点不同,制定相应的课题检索策略——主题 相似文献
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[目的/意义] 在信息检索、科技论文评价和知识结构演化方面,引文分析都起着至关重要的作用。随着格式化全文数据库的出现,引文分析迈入了4.0时代——全文引文分析阶段。但是,目前还没有中文的格式化全文数据库,这极大地制约了全文引文分析在我国科技文献中的研究和应用。[方法/过程] 在本文中我们提出建立高效的中文全文引文分析依赖的数据集和检索平台的方法,主要包括:1)提出了基于规则和SVM分类方法的论文元数据和引用提取方法;2)提出基于Spark平台的实现高效引文内容分析标准化数据集生成方法;3)提出建立引用内容的科技文献检索平台。[结果/结论] 引文内容分析标准化数据集的建立将全面提升全文引文分析在我国科技领域中的研究效能,提高科技文献查找精度。 相似文献
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