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针对用户兴趣和偏好建立用户模型，是整个数字图书馆个性化服务系统中的关键技术。在概速数字图书馆个性化服务及其用户建模的基础上，论述了数字图书馆个性化服务用户模型的表示方法、信息来源和技术类型。 相似文献
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The purpose of this study is to find a theoretically grounded, practically applicable and useful granularity level of an algorithmically constructed publication-level classification of research publications (ACPLC). The level addressed is the level of research topics. The methodology we propose uses synthesis papers and their reference articles to construct a baseline classification. A dataset of about 31 million publications, and their mutual citations relations, is used to obtain several ACPLCs of different granularity. Each ACPLC is compared to the baseline classification and the best performing ACPLC is identified. The results of two case studies show that the topics of the cases are closely associated with different classes of the identified ACPLC, and that these classes tend to treat only one topic. Further, the class size variation is moderate, and only a small proportion of the publications belong to very small classes. For these reasons, we conclude that the proposed methodology is suitable to determine the topic granularity level of an ACPLC and that the ACPLC identified by this methodology is useful for bibliometric analyses. 相似文献
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This article reports the results from an information and knowledge assessment (IKA) to identify information and knowledge needs and, their coverage by information resources to derive recommendations for improvement and proposes a contingeny framework. The approach is based on a review of audit methods from information sciences and management, knowledge management and the engineering discipline and tested with data (N = 580) collected from the engineering domain within an automotive supplier over six European sites. The integrated assessment uses content needs profiles from two complementary perspectives, the coverage of needs by various internal information sources and data on awareness and usage of these information sources. The employment of content categories on a more granular analytical level than information systems sources opens up new possibilities to derive improvement measures and requirements for the design of information systems within an organization. The brief data-gathering instrument also reduces the required resources to implement this approach considerably overcoming weaknesses previously identified in case studies and the IA literature. It makes a contribution to research bridging the gap between research and practice and opens up options to design contingency frameworks for a specific domain. 相似文献
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以概念格理论为基础,在形式概念分析的基础上,提出以粒度概念分析(GCA)的方法进行文献关键词分析,并针对Ontology领域开放存取文献的关键词,构建不同粒度概念格。通过基于粗细不同粒度概念格的挖掘,对Ontology领域相关文献进行领域高频关键词和相关低频关键词的分析,从而揭示和呈现Ontology领域相关知识的结构和内在关联,以期探索一种基于概念格的文献关键词分析的新途径。 相似文献
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回顾信息管理的发展历程,信息工厂将成为未来信息管理的新范式。按照数据和信息加工流程,信息工厂应当包括数据原料车间、信息车间和应用车间。 相似文献
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本文深入地分析了Xuri Yin等人提出的一种数据过滤算法，指出其中欠缺之处，并对该算法作了改进和理论分析。 相似文献
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李红 《辽宁科技学院学报》2007,9(3):6-7,3
文章对涉及各个领域的粒度检测方法进行了总结,介绍了机械法、波动特性法、电感应法等传统颗粒粒度测量技术的方法和原理,并介绍了色谱法、质谱法、数字图像处理测量法等近年来发展起来的颗粒粒度测量新方法. 相似文献
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In a hierarchical XML structure, surrounding elements form the context of an XML element. In document-oriented XML, the context is a part of the semantics of the element and augments its textual information. The process of taking the context of the element into account in element scoring is called contextualization. This study extends the concept of contextualization and presents a classification of contextualization models. In an XML collection, elements are of different granularity, i.e. lower level elements are shorter and carry less textual information. Thus, it seems credible that contextualization interacts differently with diverse elements. Even if it is known that contextualization leads to improved effectiveness in element retrieval, the improvement on different granularity levels has not been investigated. This study explores the effect of contextualization on these levels. Further, a parameterized framework for testing contextualization is presented. 相似文献
9.
粉体粒度检测方法的研究 总被引：1，自引：0，他引：1
李红 《辽宁科技学院学报》2008,10(1):9-10
文章对粉体粒度在线检测方法进行总结研究,并对粒度检测系统进行了设计,提出了设计方案。 相似文献
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研究了Web Service与面向服务技术,介绍了面向服务架构的新型应用程序开发模式——SOA,对企业SOA体系的设计方法进行了探索,提出了一种实用的企业SOA体系设计方法,并给出了SOA体系的最佳技术构架。利用该架构能很好地解决企业应用的快速实现,并能灵活应变企业的流程再造。 相似文献