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近几年来国外信息检索模型研究进展 总被引：2，自引：0，他引：2
信息检索模型是信息检索的核心.近几年来国外对于布尔模型的研究主要表现在对布尔模型的改进及对扩展布尔模型的进一步优化.对向量空间模型的研究,主要集中在对向量空间模型的扩展研究及对向量空间模型的应用方面.概率模型的发展主要集中在继续对概率模型进一步的研究,其与其它信息检索模型的结合,以及语言模型的研究和发展.近年来对于新兴的基于本体的信息检索模型的研究,主要集中在对基于本体的信息检索模型理论的研究,与其它检索模型的融合,以及基于本体检索模型的应用.国外信息检索模型研究的最新成果,为国内此方面的研究提供了前沿性的参考信息. 相似文献
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P2P网络信息检索的研究进展 总被引：2，自引：0，他引：2
韩毅 《现代图书情报技术》2007,2(7):36-40
在分析P2P网络概念和P2P网络信息检索的基本机制的基础上，基于信息检索的一般原理给出P2P网络信息检索的研究模型，并基于该模型从资源定位、检索模型及用户模型3个方面讨论当前P2P网络信息检索的研究现状，展望P2P网络信息检索的发展趋势。 相似文献
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利用查询术语同义词关系扩展信念网络检索模型 总被引：2，自引：0，他引：2
信念网络模型是一种重要的、基于贝叶斯网络的信息检索模型.它定义了一个明确的样本空间,给出了信息检索的一个灵活有效的基本框架.本文针对传统信念网络模型没有利用术语之间关系的缺陷,利用信息检索用同义词和词语相似度等概念,提出了最优同义词、相似概念、概念相似度等定义,提出了一种概念相似度的计算方法.然后利用上述定义对传统信念网络模型进行扩展,提出了一种基于查询术语同义词关系的扩展信念网络检索模型,讨论了扩展模型的拓扑结构和利用扩展模型进行信息检索的具体方法.实验结果表明,扩展后的信念网络模型比传统模型具有更好的检索性能. 相似文献
4.
基于认知观点的信息检索交互模型 总被引：4，自引：1，他引：4
基于情报学认知观点的信息检索交互研究是信息检索研究的一个重要领域。信息检索模型相当复杂,各类生产者、中介和用户的认知结构发生交互,影响着信息检索过程。图3。参考文献5。 相似文献
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当今的科技信息发展环境中,信息检索用户的认知行为和需求心理极为复杂.如何将信息检索中用户的潜意识显现出来,以便更好地服务于检索系统建设,是信息检索研究中的核心难题之一.研究基于流行于欧美国家及港台地区多年的身心语言程式(NLP)理论,从身心、语言和程式三个核心维度出发,构建了信息检索用户的"需求认知、表达与交互模式"、"检索语言认知、表达与交互模式"和"检索目标制定中的心理取向模型".同时结合MP中的锚理论,分析信息检索用户的"心锚"和相关的"空间锚",总结出相应的信息检索规律,构建出检索中锚交互模型、集合关系、双因子矩阵模型和表达式,并对相关的假设模型进行数据检验和优化. 相似文献
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用户在Web2.0交互式环境中,以非线性、非单一、非大众的方式搜索信息。基于LISA文献和C.C.Kuhlthau的信息检索行为模型,本文设计了一项对中科院研究生院的研究生在Web2.0环境中的学术信息检索的问卷调查。这项使用信息检索行为模型的实证研究产生了16项优化与4个应用途径的建议。 相似文献
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文章对高校数字图书馆信息检索进行了简单阐述,在对信息检索过程中存在的障碍问题进行具体分析的基础上,从认知风格、认知能力、知识与经验三方面探讨了用户认知因素对信息检索的影响,构建了高校数字图书馆信息检索用户认知模型,并认为智能化、多元化和个性化是基于用户认知的高校数字图书馆信息检索的发展趋势. 相似文献
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论文引入信息整合理论,对信息整合在网络信息检索系统中的应用问题进行探讨.文章在分析网络信息检索存在的问题后,探讨了采用信息整合原理来解决网络信息检索中的问题在理论上的可能性,提出信息整合理论是解决网络信息检索系统存在问题的一种有效策略的观点.信息整合的机制按照信息整合的层次可分为信息浅层整合、信息深层整合和信息语义整合三种类型.最后,文章论述了数据库整合、检索结果整合、应用程序整合和网络信息检索系统整合的步骤和方法,构建了数据库整合和网络信息检索系统整合的模型. 相似文献
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二元语义信息检索模型* 总被引：1，自引：0，他引：1
提出一个基于二元语义的信息检索模型。该模型包含文档的表示、查询语句的表示、文档和查询的匹配3个部分。相对于传统的基于查询关键词精确匹配的信息检索模型,该模型能较好地满足用户查询要求中的灵活性。 相似文献
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Josie Barnes Parker 《图书馆管理杂志》2013,53(6):731-737
ABSTRACTIn today's current political environment raising support for millage renewals, bond campaigns or even millage continuations for public libraries is affected by national politics, and a tendency towards tax aversion on principle across the country. The lessons we can learn from the governing boards of small and rural public libraries are worth raising up to a greater national consciousness. Board governance, community consciousness, and facilities management are clear and logical tools that elected boards of public libraries can use to politick for support of libraries. 相似文献
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Milan Grba 《Slavic & East European Information Resources》2017,18(3-4):152-164
This article surveys a sample of sources of the information about Romania available to British readers in nineteenth century British newspapers and periodicals. It traces first contacts between the Romanian lands and Britain after the union of the principalities of Wallachia and Moldavia in 1859, then after their independence from the Ottoman Empire. The article highlights an increased Romanian interest in British periodicals, which reported and reviewed Romanian literature and scholarship. The article concludes that nineteenth century British newspapers and periodicals offer a great variety and wealth of new material previously unavailable or unknown to researchers. It also states that only a portion of a large quantity of this material has been indexed and is therefore available via the bibliographic sources mentioned in the article. The author argues for the need of a new and updated British-Romanian bibliography, which can draw on new online resources offering access to thousands of new newspapers and periodical records. 相似文献
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《Slavic & East European Information Resources》2013,14(1):25-74
ABSTRACT The history of the almanac in Croatia is reconstructed through primary research in bibliographic and archival sources. The almanac is a vehicle for knowledge communication in informal contexts, engaging both oral tradition and literary forms traceable to medieval literacy and ways of structuring knowledge. The history of the almanac in Croatia reflects the changing context of the book trade, literacy, and the evolution of language. Four main stages are identified: (1) the beginning of the annual almanac in the seventeenth century; astrological almanacs reflecting the sensibility of the Baroque period; (2) the Enlightenment's stimulation of almanac publishing in the spirit of contemporary secular reforms in agriculture and education; (3) nineteenth-and twentieth-century almanac trade, showing complex and overlapping networks for the production, distribution and appropriation of printed almanacs;(4) roughly the end of World War II, when the almanac slowly moved out of the role of a popular mass medium and into specialized niches represented by regional, diaspora, and religious almanacs. 相似文献
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《Slavic & East European Information Resources》2013,14(4):25-33
ABSTRACT The paper looks at library approval plans for material published in Slavic, East European, and Eurasian countries from the selector's point of view. Reasons why a selector would or would not want one are examined. Success with approval plans requires monitoring receipts, as well as good and ongoing communication among the selector, the acquistions department, and the vendor. A preliminary list of vendors offering approval plans for the countries of the region appears in the appendix. 相似文献
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Neil De Young 《Publishing Research Quarterly》2009,25(3):139-146
Some key questions for publishers in today’s market are: Could Amazon’s recent merger and acquisitions strategy create a disruptive or paradigm shifting business model in the publishing industry? Do their recent actions post mergers and acquisitions illustrate a predicable pattern of behaviour that publishers can strategize around? This paper will explore these questions and look at some of the possible reasons behind Amazon’s business practices and the possible consequences to publishers. 相似文献
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Barbara Lison 《图书馆管理杂志》2013,53(2):180-187
ABSTRACTGerman authorities are expecting more than 1 million refugees by the end of 2015. These people come to Germany to seek protection and assistance and to build a new life, therefore it is important to welcome them and to assist them in their integration as soon as possible. This situation creates a versatile and perfectly fitting opportunity for cultural and educational programs, including libraries, which can play a vital role in this integration process. The key to integration is the knowledge of the German language, and the most important challenge now is to teach the necessary language skills to as many asylum-seekers as possible. 相似文献
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《Journal of Web Librarianship》2013,7(1):41-59
Abstract Many libraries use RSS to syndicate information about their collections to users. A survey of 65 academic libraries revealed their most common use for RSS is to disseminate information about library holdings, such as lists of new acquisitions. Even though typical RSS feeds are ill suited to the task of carrying rich bibliographic metadata, great potential exists for developing applications that can exploit metadata exposed to Web services via RSS. Using the MODS metadata format, entire catalog records can be seamlessly embedded in RSS 2.0 feeds. Existing tools, such as Library of Congress Java toolkits and XSLT stylesheets, can facilitate this process, while a new XSLT stylesheet may be used to create the RSS feeds complete with MODS records. As an example of the added functionality these MODS/RSS feeds can offer, records from a MODS-enriched RSS feed can be ingested into a non-RSS application such as Zotero. As more emerging library technologies use Web services architectures to handle data objects, the ability to syndicate catalog records will become more critical to providing innovative library Web services. 相似文献
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为进一步提升武汉科技信息共享服务平台使用效率,本文从平台资源建设、资源应用、供需对接方式和供需特点等方面分析了武汉科技信息资源服务现状;基于需求和利用的角度,结合平台管理实践和走访用户、问卷调查等研究方法,从信息资源需求主体和平台自身建设管理两个维度,找出制约科技资源供需对接的主要因素;以市场化和制度化为创新理念,从政策创新、机制创新、市场化服务、环境营造、人才培养等方面提出平台建设由“资源集聚”向“需求导向”转变的对策建议. 相似文献
19.
Michelle Rodino-Colocino 《Critical Studies in Media Communication》2013,30(5):375-390
This essay investigates key moments in the history of personal digital assistant (PDA) marketing to women. Analyzing promotional texts for three PDAs that received considerable press coverage from 1999 to 2001, this essay explores the cultural significance of the convergence of anxieties about women's place in the gendered division of labor with the computer industry's changing marketing imperatives. Drawing on an array of promotional texts, including news articles, press releases, promotional Web sites, and ads appearing in newspapers and magazines, this paper tells the story of how the computer industry aimed to sell smaller, faster computing devices to women while promising to mediate and thus reproduce women's overwork as paid and familial laborers. After experimenting with the PDA as a sexy fashionable gadget for working women, marketers approached women as mothers with “Audrey,” an Internet appliance designed for the kitchen. 相似文献
20.
Lindsay Dillingham 《Journal of Business & Finance Librarianship》2013,18(4):313-327
This study explores the attitudes and actions of bank managers toward communication spending during recession. Results of this study indicate that organizational leaders cut communication spending early during recession and also erroneously rely on the bank's financials to mitigate irrational customer withdrawals. This research is used to illustrate the need for public librarians to meet the needs of bank stakeholders when their institution ceases to communicate during crises, for academic librarians to educate students in undergraduate and graduate programs regarding heightened information needs during recession, and for corporate librarians to understand a potential avenue for competitive advantage during recession. 相似文献