共查询到19条相似文献，搜索用时 296 毫秒
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本概述了美国对公共图书馆网络信息过滤问题的争论；介绍了网络不良信息对美国未成年人的影响、美国政府近年来出台的有关的法案、美国图书馆协会反对在图书馆使用网络信息过滤的主要原因；提出有关我国图书馆网络信息过滤问题的一些看法。 相似文献
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齐蕾 《中国科技资源导刊 (中国信息导报)》2007,(5):35-37
本文论述了国内外制约网络信息过滤的问题,强调了图书馆网络信息过滤只有在法律的基础上,运用现代技术手段,结合网络道德教育,加强网络管理,才能使网络信息的过滤更加完善。 相似文献
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图书馆网络信息过滤问题研究 总被引：9，自引：0，他引：9
网络信息过滤是根据一定的标准和利用有关的工具,从动态的网络信息流中剔除或选取相关信息的一系列过程。图书馆过滤网络不良信息的对策有:明确过滤的范围;选择合适的过滤软件;制定合理的网络使用规定;对网络信息进行分级管理,等等。参考文献4。 相似文献
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网络信息过滤系统研究 总被引：22，自引：0，他引：22
网络信息过滤是根据一定的标准和利用一定的工具从动态的网络信息流中选取相关的信息或剔除不相关信息的一系列过程。本文论述了网络信息过滤的原理 ,概述了网络信息过滤系统的主要类型 ,分析网络信息过滤软件的结构和功能、介绍了过滤软件的评价与选择方法 相似文献
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阐述了网络信息过滤系统的类型,包括从过滤系统的结构、操作的主动性、信息过滤的目的、过滤模板所在的位置、从用户获取信息的方法、过滤的不同应用等方面进行分类,为进一步研究信息过滤系统的实现奠定了基础。 相似文献
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作为一门学科的网络信息传播 总被引：5，自引：0，他引：5
网络信息传播已经成为学术界的研究热点,但对网络信息传播作为一门学科认识还很模糊。文章从学科的角度对网络信息传播的研究对象、学科属性以及与相关学科的关系进行了研究。 相似文献
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搜索引擎的信息过滤技术 总被引：16，自引：0，他引：16
姜恩波 《现代图书情报技术》2001,17(3):33-35
随着网络信息数量的迅猛增长,“信息过载”、“信息超载”现象引起了人们的重视。信息过滤技术就是为了克服上述现象, 减少用户在获得信息过程中的负担, 向用户提供数量适宜、质量优良的信息。本文在略述了信息过滤技术的产生背景后, 介绍了两种比较常用的信息过滤模型——布尔逻辑模型和向量空间模型。SIFT 是一个著名的信息服务系统, 它的核心就是信息过滤技术。因此, 文章还详细地介绍了SIFT 的工作原理和其中所使用到的信息过滤技术, 并且对S IFT 的性能、特点进行了分析, 指出了它的一些不足。 相似文献
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网络的迅速发展，使信息的传递更加方便和快捷，但随之出现了“信息过载”、“信息超载”及负面信息在网络广泛传播等问题。为了不让那些负面的、无用的信息影响到图书馆的信息服务，图书馆应考虑通过信息技术对网络信息进行过滤。 相似文献
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文章描述了网络生态系统非理性信息的概念与特征,分析了非理性信息对信息人的认知和行为产生的影响,提出了对网络生态环境非理性信息分类、甄别、监督的过滤策略.在此基础上,构建了网络生态环境非理性信息过滤模型,并以微信系统为例,对其非理性信息的过滤流程进行了具体设计. 相似文献
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网络信息过滤方法的比较研究 总被引：14，自引：0，他引：14
系统地研究了网络信息过滤的主要方法,包括分级法、URL地址列表法、自动文本分析法和图像识别技术等,指出了每种方法的主要优缺点,并在此基础上探讨了网络不良信息过滤方法存在的主要问题及其发展方向。 相似文献
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本文以美国为背景,分别从相关政策法规和法院判例两个方面对图书馆提供的互联网服务所引发的社会矛盾进行研究。研究发现,在过滤软件的使用问题上,联邦政府与图书馆协会的立场迥异。联邦政府要求图书馆使用过滤软件,而图书馆协会则持异议。对比和研究法院判例发现,争议主要聚焦于两个方面：过滤软件是否会过滤掉有用信息,对于儿童是智识自由重要还是保护儿童更重要。通过研究美国图书馆互联网服务引发的争议,可以揭示互联网环境下智识自由与社会责任之间关系的复杂性,对我国图书馆界在相关问题的处理上有借鉴意义。表1。参考文献32。 相似文献
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《图书馆管理杂志》2013,53(2-3):87-95
Abstract This article considers the use of filtering software (“censor-ware”) and the World Wide Web. It argues that the United States government, religious groups, and corporations should not deter freedom of speech and access to information in libraries. The article describes how governments and religious groups try to prevent Web sites from reaching Internet users, and explains how corporations sell and use filters for their own benefit. It also introduces organizations that rate Web sites as an alternative to electric filters, and presents people and groups that oppose filtering. In conclusion, it supports the idea that librarians and information professionals can educate Internet users without the interference of external entities and censorship. 相似文献
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Internet个性化智能信息检索的分析与研究 总被引：9，自引：0，他引：9
本文首先对Internet网上信息检索进行了综述与分析 ,针对存在的问题 ,介绍了智能Agents的解决方法 ,最后本文提出了一个多Agents系统的个性化智能信息检索系统的模型 ,该模型集成了神经网络、最好优先算法、信息过滤、相关反馈等多种算法 相似文献
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Adaptive filtering of news is an area of information retrieval gaining substantial interest as services become more available on the Internet. This paper reports on a number of experiments involving a two-level clustering approach using a variety of techniques including threshold adaptation, topic vocabulary adaptation and both noun phrase and named entity adaptation. Our goal in this exploratory research is to empirically compare alternative configurations of our filtering approach that will allow us to better understand the relative value of the component subsystems. 相似文献
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搜索引擎中信息存储结构的改进 总被引：3，自引：0，他引：3
网络已经成为世界上最大的数字图书馆。目前网上信息数量仍在急剧膨胀 ,无用信息所占比例愈来愈大 ,而且网络传输速度较慢 ,由于数据的存储结构直接影响着查询质量和查询速度 ,因此网络信息的存储方式亟需改进。本文针对网络信息固有的特点提出一种新的文档存储结构 ,改进了搜索引擎的性能。主要内容包括信息的自动分类 ,网页相关度的计算 ,垃圾信息以及重复信息的过滤等技术 相似文献
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Xiaoying Dong 《International Information and Library Review》2003,35(2-4):163
This study examines the use of Internet resources and the evaluation of their usefulness from the perspectives of Chinese students and academics. The questionnaires were distributed at Peking University, ISTIC, and at the Information Institute of Science and Technology of Zhe Jiang Province, where 706 valid samples were collected. The data was analyzed according to: The background of the Internet users; the standard of Internet resources; Internet information-seeking behaviour; users’ evaluations of Internet resources and their perceived expectations about future Internet services. The study found that users with higher educational degrees tend to spend more time on the Internet and find Internet resources more useful than less-educated users. Although Internet search engines are the preferred information retrieval tool, other traditional or informal retrieval methods are also used. Many respondents agree that the Internet is helpful for narrowing the knowledge gap between developed and developing countries. Besides its richness and high speed, accuracy and authority are the most important factors when users judge the quality of the Internet; but, more specialized information filtering and navigation services are required. Further studies should focus on the information-seeking behaviour of different target groups, and with specific comparisons of Chinese academic users from economically developed areas, versus users from China's comparatively undeveloped Northwest provinces. 相似文献
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Xiaoying Dong 《International Information and Library Review》2013,45(2-4):163-187
This study examines the use of Internet resources and the evaluation of their usefulness from the perspectives of Chinese students and academics. The questionnaires were distributed at Peking University, ISTIC, and at the Information Institute of Science and Technology of Zhe Jiang Province, where 706 valid samples were collected. The data was analyzed according to: The background of the Internet users; the standard of Internet resources; Internet information-seeking behaviour; users’ evaluations of Internet resources and their perceived expectations about future Internet services. The study found that users with higher educational degrees tend to spend more time on the Internet and find Internet resources more useful than less-educated users. Although Internet search engines are the preferred information retrieval tool, other traditional or informal retrieval methods are also used. Many respondents agree that the Internet is helpful for narrowing the knowledge gap between developed and developing countries. Besides its richness and high speed, accuracy and authority are the most important factors when users judge the quality of the Internet; but, more specialized information filtering and navigation services are required. Further studies should focus on the information-seeking behaviour of different target groups, and with specific comparisons of Chinese academic users from economically developed areas, versus users from China's comparatively undeveloped Northwest provinces. 相似文献
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《Government Information Quarterly》2006,23(1):123-141
The provision of public Internet access and related networked services by public libraries is affected by a number of information policy issues. This article analyzes the policy dimensions of Internet connectivity in public libraries in light of the data and findings from a national survey of public libraries conducted by the authors of this article. After providing a summary of the study methodology and findings, this article examines key policy issues that include the nature of sufficient bandwidth and broadband, the perpetuation of the digital divide of Internet access in libraries, the role of libraries as e-government access points, the complexities of funding Internet access, the impacts and contradictions of filtering, and the chilling effect of homeland security legislation in public libraries. This article concludes with a discussion of how examining these policy issues can lead to a better understanding of public libraries and the Internet access they offer within the context of public policy. 相似文献