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本文将聚类分析引入竞争情报分析之中,构建了基于领域本体的竞争情报聚类分析模型。该模型利用竞争情报领域本体指导文本语义分析和标注,抽取特征概念和概念间关系,实现语义层面的文本表示;针对传统的聚类分析算法无法进行深层次的聚类分析,设计了一种基于语义核函数的聚类分析算法进行挖掘分析,实现深层次的聚类分析。实验结果表明,该模型取得了很好的预期效果,显著提高了竞争情报分析的准确率和效率。 相似文献
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针对当前竞争情报分析算法无法有效地处理结构类型多样的Web评论信息,研究并设计了基于Web评论挖掘的动态竞争情报分析算法进行语义层面的情报分析,获取深层次的动态竞争情报。该算法主要由评论内容识别与抽取、语义关联挖掘、文本语义极性分析3个部分组成。实验结果表明,该算法能够显著地提高情报分析的准确率和效率,实现深层次的评论挖掘和情报知识发现。 相似文献
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针对传统的竞争情报分析模型无法有效地对情报源进行深入挖掘分析,获取企业所需的深层情报内容,本文构建了基于语义空间和SVM的竞争情报分类分析模型.该模型利用语义空间来表示文本,提高文本表示的精度;利用基于语义核函数的SVM分类分析算法进行学习和训练,实现语义层面的竞争情报分类分析.实验结果表明,该模型取得了很好的预期效果,显著提高了竞争情报分析的准确率和效率. 相似文献
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[目的/意义]互联网开源信息具有海量、多源异构等特点,如何从中及时发现有价值的信息,并对信息加以情报利用一直是情报研究和实践应用的重点领域之一。文章提出一套开源的学术会议领域信息抽取框架,解决信息抽取语义理解和关联融合的问题,并将其应用于情报研究中,为解决情报分析的智能应用提供工具和方法。[方法/过程]采集网络上新闻报道的内容,采用预训练语言模型方法挖掘学术会议事件信息,提出面向特定领域的信息抽取框架,实现会议名称及其举办时间、地点、出席人、发言人信息的抽取,并进行实际的情报利用研究案例分析。[结果/结论]相较于单一抽取实体的方法,抽取会议核心元素更具有情报关联性和准确性,可以更好地对开源热点事件发现和跟踪监测、目标人物轨迹动向分析等研究提供方法,为情报分析应用和情报研判奠定基础。 相似文献
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针对情报人员在国防产品情报联合搜索中遇到的问题,提出一种基于国防产品情报本体的多信息整合的搜索方法。该方法采用信息抽取技术自动构建本体实例,运用本体对用户查询请求进行语义分析处理,同时实现了基于该方法的原型系统。 相似文献
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面对网络中日益丰富的用户评论信息,利用评论挖掘技术对其进行智能化的自动分析,获取非传统意义上的动态竞争情报,对于企业竞争战略的制定和竞争优势的保持具有重要意义。文章在详细分析Web评价挖掘技术研究现状和当前竞争情报分析存在问题的基础上,将Web评论挖掘融入企业竞争情报分析之中,构建了基于Web评论挖掘的动态竞争情报分析模型,阐述了模型中各个模块的主要功能及其实现策略。 相似文献
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高校与高校之间的数字信息资源因应用的平台、数据结构和实现方式的不同,给资源的共享带来了很大的不便。构想运用语义网格理论,构建语义网格模型CI-Grid,探讨一种利用本体整合分布式异构数据库资源的机制来解决该问题,提高高校的知识服务水平。 相似文献
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本文针对关键词检索无法反映出文章的语义信息及无法满足用户的个性化检索的问题，结合本体和智能Agent技术。提出了一种基于本体的信息检索智能Agent模型，研究并分析了在这种模型框架下检索信息的流程。 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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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
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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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《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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《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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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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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
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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Leah A. Lievrouw 《The Information Society》1998,14(2):83-96
The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests. 相似文献