复杂网络上传染病防控的研究     

王剑凌 《福建教育学院学报》2011,(2):125-128

在分析小世界网络和无标度网络的概念和特征的基础上,回顾经典的传染病模型,从隔离和接种疫苗两个方面,对复杂网络上传染病防控的研究成果进行系统总结,并展望未来的发展趋势。  相似文献   

论地方电大在线平台如何应对网络文化的挑战     

杜俊 《广州广播电视大学学报》2011,11(2):42-45,109

网络文化的发展对地方电大在线平台有巨大的影响,从规范化、信息化、个性化到＂自由＂化。在线平台不仅要在平台页面和栏目上精心设计,内容丰富,及时更新,而且要搭建学员与教学人员及时互动的交流平台,同时大力强化网站管理,与相关学习之间门户联合,资源互补,以应对挑战。  相似文献   

基于混合图的在线社交网络朋友推荐算法     

俞琰  邱广华  陈爱萍 《现代图书情报技术》2011,(11):54-59

针对在线社交网络朋友推荐问题,尝试融合多个社会网络为一个混合图模型,采用基于混合图模型的重启动随机游走算法,为用户提供个性化的朋友推荐,并通过参数调节多个网络的权重。实验表明,该算法提高了在线社交网络朋友推荐的准确性。  相似文献   

多维多息特征数据挖掘方法研究——以中药指纹图谱数据为例   总被引：1，自引：0，他引：1  

童逸夫  黄春毅 《现代图书情报技术》2011,(12):69-73

利用R开源统计分析软件平台,以中药HPLC指纹图谱数据为例,构建多维多息特征数据挖掘模型并进行可视化处理分析,研究结果显示主成分分析降维后的综合主成分能够反映多维多息特征数据的规律,并且验证主成分聚类模型及神经网络模型用于揭示多维多息数据的信息特征的有效性与实用性。最终根据主成分聚类分析结果,建立未知产地川芎样晶的产地预测鉴别模型,从而为川芎质量控制提供参考  相似文献   

数字图书馆中的智能推荐技术研究     

王正勤  牛永芹  颜莉莉 《图书情报工作》2011,55(17):108-111

为构建一种精确性较高的智能信息技术模型,对蚁群算法、SOM网络进行分析与研究,并基于两者构建智能推荐技术,运用该技术完成模型的建立与更新。最后利用已建模型对目前较通用的读者原始流通信息记录进行测试,验证结果表明该技术的个性化信息服务的准确率较高,且具有较高理论意义与应用价值。  相似文献   

知识网络的结构及其知识活动分析     

王涛  顾新 《图书情报工作》2011,55(16):107-110

认为知识网络能帮助企业整合资源,获取竞争优势。对以知识链为基本单元的知识网络的内涵、结构及其知识活动进行分析,提出知识网络的构成要素包括网络节点、网络资源、网络活动和支撑环境四个部分,构建出知识网络结构示意图。在此基础上,分析知识网络中的知识活动以及知识活动的基本分析单位之间的知识流动模式。  相似文献   

基于扩展模糊概念网的信息检索结果个性化的研究     

俞扬信 《情报学报》2011,28(3)

电子文档和用户的增长导致了信息检索结果个性化模式的创新,从而更好地为用户偏好服务.个性化的内容检索旨在改善检索过程中考虑个别用户的特殊兴趣.本文提出了一种基于扩展模糊概念网的信息检索结果的个性化的新方法.在这种方法中,网页和用户偏好都将以扩展模糊概念网形式表示.扩展模糊概念网可看作是关系矩阵和关联矩阵模型,关系矩阵中的元素代表模糊概念间的关系,关联矩阵中的元素表明概念间的关联度.这种方法的好处是能找到用户查询的绝大多数文档并且更灵活、更好地显示给用户.  相似文献   

试论手机媒体内容的信息网络传播权     

曲博  党跃臣 《图书馆学研究》2011,(1):74-77

当前,手机已成为继报刊、广播、电视、互联网之后被公众所广泛认知的"第五媒体",即手机媒体。手机媒体内容作为无可置疑的著作权法涵盖客体是手机媒体传播的主要对象,其信息网络传播权因手机媒体传播方式的多样性而受到巨大威胁。手机媒体内容信息网络传播权研究是著作权法学理论应用于手机媒体领域中的一项重要课题。文章以手机媒体内容的作品性为研究基点,探讨其信息网络传播权的内涵与特征,进而界定了常见的侵权行为。  相似文献   

Professional networks, scientific collaboration, and publication productivity in resource-constrained research institutions in a developing country     

Marcus Antonius Ynalvez  Wesley M. Shrum 《Research Policy》2011,40(2):204-216

We test the hypothesis that scientific collaboration is associated with increased publication productivity. We differentiate our approach from other studies by (a) incorporating professional networks in the productivity model, (b) casting productivity and collaboration as distinct phenomena, and (c) examining these phenomena in the context of resource-constrained research institutions in a developing country. We use survey data and employ negative binomial regression models. Results indicate that publication productivity is significantly linked to professional network factors, but there is no evidence of any association with scientific collaboration. We observe that most scientists collaborate in research projects despite coordination difficulties, and without any measurable impact on their productivity. Our interviews reveal that a possible answer to this puzzle appears to be rooted in a practice that views collaborative research projects not mainly as a means to producing knowledge and gaining recognition, but for acquiring professional opportunities and extrinsic rewards. Our findings suggest a new way of modeling publication productivity, with implications for science and innovation policy in both the developed and the developing world.  相似文献   

Knowledge management and communication in Brazilian agricultural research: An integrated procedural approach     

Tércia Zavaglia TorresAuthor VitaeIvo Pierozzi Jr.Author Vitae  Nadir Rodrigues PereiraAuthor VitaeAlexandre de CastroAuthor Vitae 《International Journal of Information Management》2011,31(2):121-127

The great contemporary organizational challenge for enterprises is to create a conceptual and methodological framework allows the management of knowledge by means of networks designed for social interaction. This statement is based on the premise that the competitive drive and sustainable success of the company depend on the introduction of new forms of production innovative processes, which can only be ensured through integrated approaches to knowledge management and the incorporation information technologies (IT). This is a reality that has already been accepted by the Brazilian Agricultural Research Corporation (Embrapa, its acronym in Portuguese), a Brazilian research, development, and innovation (RD&I) institution supporting agricultural sector. For some years now, Embrapa has been incorporating what it has learned about knowledge management into its strategic planning process. In this paper, we present a new approach to managing knowledge and information, and we analyze the need for research institutions to administer the knowledge they produce through an RD&I management model based multi- and inter-disciplinary teams, and multi-institutional research networks.  相似文献