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本体模块的抽取是解决本体复用问题的关键技术.分析了本体模块抽取的相关研究现状,提出一种基于粒度抽取本体模块的算法.该算法利用WordNet和本体上下文来得到可表示本体结构中粒度特征的一组介于0和1之间的实数值,即本体中概念词和关系词的分面权值,使本体模块的边界得到合理的区分.实验表明,该算法能够有效地抽取出符合指定粒度参数的本体模块. 相似文献
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指出传统心理咨询专家系统存在的问题,以及本体技术对解决这些问题的优势,设计了基于本体的心理咨询专家系统模型.以儿童青少年心理咨询方面的知识为例,构建本体库,作为专家系统知识库的核心.最后对系统的查询预处理模块、语义处理模块和检索推理模块等主要功能模块进行阐述. 相似文献
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基于本体的隐性知识转化研究 总被引：1，自引：1，他引：0
根据当前关于知识转化的相关研究,从本体出发,提出一种基于本体的隐性知识转化框架,从而能有效地应用和共享隐性知识。这种框架由获取模块、存储模块、推理模块和传递模块组成,最后会给出一个电脑故障诊断实例来加以阐述该框架。 相似文献
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针对大本体构建、本体复用和推理效率问题,模块化本体受到学者们的广泛关注。领域本体随着领域、时间、应用环境等的变化而不断发生着演变,由于分模块构建的子领域本体之间存在联系,所以当某个子领域本体发生进化时,其进化的影响会传播给与之有关的其他子领域本体,所以领域本体进化问题就变成了子领域本体之间的协同进化问题。本文在以领域词表为基础构建了子领域核心本体模块并进行连接的基础上,给出了协同进化相关形式化定义,提出了一种子领域本体协同进化方法,并设计了协同进化算法,然后以高速铁路领域为背景验证了其可行性。 相似文献
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基于本体的数字图书馆信息检索模型构建 总被引：1，自引：0，他引：1
针对数字图书馆信息检索中存在的问题引入本体的概念,对本体的作用和构建原则进行了分析。在此基础上,提出了从本体角度出发的数字图书馆文献信息集成方法以及基于本体的数字图书馆信息检索模型,解析了其核心模块和本体学习的相关技术。 相似文献
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著作权集体管理制度有别于专利、商标和其他知识产权领域,是一种独有的、较为特殊的知识产权保护机制。美国从第一家著作权集体管理组织诞生至今已有近百年的历史,著作权集体管理已成为美国知识产权保护、知识经济发展不可或缺的工具;我国著作权集体管理组织起步较晚,目前尚处于初级阶段,还面临着诸多问题和困难。本文重点概述美国具有代表性的著作权集体管理组织,并对比分析我国著作权集体管理组织的现状,指出我国著作权集体管理组织尚待完善,科技期刊进行著作权集体管理十分必要,集体管理是著作权保护的必由之路。 相似文献
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介绍了本体的定义及表示语言、数据集成的难点和方法 ,并对所设计的基于本体的图书馆集成系统(OILS)的结构以及主要组成模块进行阐述。 相似文献
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面向个性化服务的信息组织本体模式 总被引：1，自引：0，他引：1
本文在总结目前个性化服务信息组织的特点和模式的基础上,结合智能化本体方法,提出一种基于用户本体和领域本体的面向个性化服务的信息组织模式,并详述了其中的资源描述、用户建模和信息重组3个模块的详细流程、描述语言和具体算法. 相似文献
10.
本文阐述了文本单元向知识单元转化的必要性和过程。利用本体技术构造知识单元，采用本体描述语言实现对知识的本体表示，阐述了OTKTS系统的两个主要模块。 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
16.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献