共查询到20条相似文献，搜索用时 78 毫秒
1.
在创新孵化网络演化机制的基础上,描述了创新孵化网络内知识双重扩散过程;同时考虑网络关系边权演化和知识势差等因素,提出三种知识扩散方选择策略并进行模拟仿真。结果显示:具有无标度特征的创新孵化网络能够有效提升网络整体知识水平和知识均衡度;以知识势差为扩散准则的实用策略可暂时提高网络整体知识水平,但会降低知识均衡度;从长远来看,综合考虑知识势差和关系强度的融合策略是提高网络整体知识水平以及均衡度的有效策略。 相似文献
2.
3.
4.
跨国知识交流对发展中国家具有十分重要的意义。组织的显性知识与隐性知识经由实物形态的产出和人员交流,即有形和无形的流动渠道得以扩散。基于我国电力系统专利的引用、合作申请以及共同发明人信息,分析和对比了显性和隐性知识的跨国溢出与创新扩散网络结构特征。研究发现,显性知识溢出网络和创新扩散网络相对比较分散,且度分布具有明显的无标度特性。而基于发明人交流的隐性知识流动网络结构明显不同,不仅为组织提供了更多的知识渠道,而且缩短了知识的传播距离并降低了核心节点的信息控制作用,有利于网络中知识传播效率的提高。 相似文献
5.
本文建立了一个基于层次的企业间网络演化分析框架,将企业间网络演化过程分解为知识网络、信任网络、资源网络和电子商务协同网络四个层次,着重分析了知识、信任和资源在企业间网络演化中的作用和地位,提出作为复杂过程的企业间网络演化是各个层次网络演化的叠加。 相似文献
6.
[目的/意义] 面向科研合作网络中的学术社群,提出基于合作者吸收能力的知识扩散种子选择方法,以提升社群知识扩散效率,促进社群成员知识吸收。[方法/过程] 运用R软件完成仿真实验。基于斯坦福大型网络数据集（SNAP）的真实科研合作网络数据,运用社团检测算法"WalkTrap"检测出学术社群。将各学术社群中合作对象吸收能力总和最大的节点作为各社群的知识扩散种子,基于此,在各社群内部实施知识扩散仿真实验,并用其余4种基于网络中心性的方法与本文方法作对比。[结果/结论] 基于合作者吸收能力的种子选择方法,在网络整体知识水平、知识水平分布均匀性与扩散初期的知识增长速度等方面均优于其它4种方法,且节点吸收能力差异越大,这种优势就越突出。节点平均吸收能力越强或网络中节点平均度越大,知识扩散效率受种子选择方法的影响越小。 相似文献
7.
知识型团队有效知识转移的社会资本结构优化研究 总被引：23，自引：0，他引：23
知识型团队是组织进行知识创造的理想场所或者“Ba”,在开放系统下团队内外部的知识转移能力很大程度上决定了知识创造结果．根据团队运行需要,本文认为“内部偏重于隐性知识转移而外部加强显性知识转移”是一个合理的安排,而与此相应的社会资本结构优化设计是：团队内部社会资本应具有强连结、紧密型网络、一般信任和共同的结构性知识等特征,而外部社会资本则应表现为弱连结、松散型网络、特殊信任和共同的组件性知识,前者有利于成员之间进行隐性知识的深度转移,而后者则有利于成员从外部主体进行显性知识的广度转移． 相似文献
8.
隐性知识是创造新知识的重要源泉,是一个组织获取竞争优势、持续发展的资源.图书馆内部隐性知识的有效转移是促进知识创新、增值并增强自身核心竞争力的重要途径.本文阐述了隐性知识的涵义、特征和图书馆内部隐性知识转移的本质与方式,深入探讨了提高图书馆内部隐性知识转移成效的策略:①建设图书馆组织文化,②构建灵活的组织结构,③建立良好的信任关系,④运用现代信息技术,⑤建立多元化的激励机制,⑥开发知识共享方式,加速图书馆隐性知识的应用. 相似文献
9.
在简要介绍产业集群的基础上,对知识扩散的相关研究成果进行述评.阐述显性知识基于Web2.0和基于引证网络两种常见的扩散模式,归纳非正式的隐性知识、分散在社会文化中的隐性知识、语义的隐性知识以及睿智的隐性知识的扩散特点.分析知识外化和内化过程.指出产业集群中企业高度密集的特点以及提升整体技术水平的需要,使得企业通过直接交流和技术扶持等方式促进知识扩散.根据扩散边界,将知识扩散划分为个人层次、企业层次以及国家层次.最后展望下一步的研究工作. 相似文献
10.
从二次孵化情景下创新链与产业链融合度,以及企业知识吸收能力两个维度定义新兴产业企业结网策略,基于复杂网络理论构建新兴产业知识网络涌现的动态仿真模型,揭示二次孵化时企业不同结网策略下,新兴产业创新网络和知识水平的演化规律。研究结果表明：企业结网策略会影响创新网络演化和知识涌现。企业采取知识深度、知识宽度和融合导向等三种结网策略时,新兴产业最终都会实现知识网络涌现,但不同策略下创新网络和知识水平演化规律存在差异。在促进产业聚集的同时,吸引和培育异质知识企业,增高创新链与产业链融合度,对提升二次孵化功能具有重要意义。 相似文献
11.
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
12.
《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
13.
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
14.
《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
15.
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
17.
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
18.
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
19.
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
20.
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