共查询到20条相似文献，搜索用时 234 毫秒
1.
2.
本文认为不同群体创业的社会网络演化特征既具有共性,又存在差异性,揭示了大学生、企业职工创业社会网络演化的关系强弱特征、结构拓扑特征、功能集成特征以及价值多元特征,构建结构方程模型并展开分组比较研究,得出:大学生、企业职工创业社会网络演化的关系强弱对功能集成不具有正向影响;关系强弱对价值多元不具有正向影响;结构拓扑对功能集成不具有正向影响;大学生创业社会网络演化的功能集成对价值多元具有正向影响,企业职工创业社会网络演化的功能集成对价值多元不具有正向影响。 相似文献
3.
话语分析是复杂演化环境下,认知企业行为的新兴技术路径。本文应用话语分析方法,聚焦集群情景下的小微企业,研究了进化创业行为的驱动机理问题。得到的主要命题有:(1)小微企业的进化创业行为可由微创新、战略更新和风险投资3个维度描述。(2)集群情景从结构、关系和认知3个侧面影响小微企业的进化创业行为。(3)集群情景对进化创业行为的驱动机理涉及学习、挤压、过滤和治理4个驱动因子。(4)驱动机理可以刻画为网络节点→刻意学习等24条关系路径,其中,包括7条弱关系路径。研究丰富了现有创业理论,对小微企业的创业实践具有指导价值。 相似文献
4.
创业企业社会网络进化图谱研究 总被引：3，自引：0，他引：3
社会网络进化图谱是对创业企业进化过程中社会网络本质特征的经典总结、动态规律的深度挖掘以及演化轨迹的形象描绘,揭示了创业企业进化过程中社会网络的周期性、层次性、对等性、异构性、逆向性等图谱特征。基于创业企业进化过程中社会网络关系维、结构维与规模维的规律性变化,分别设计出了功能——层级性、中心——边缘型与原型——镜映型创业企业社会网络进化图谱,比较分析了3种类型创业企业社会网络进化图谱的度量方式、形成机理及主要特征。 相似文献
5.
采用群体案例研究的方法,选取国内六家成功的创业企业在其社会网络演化过程中的试错行为作为研究对象,探索了创业企业在其社会网络演化过程中发生试错行为的动因、规律、特征。研究发现,创业企业社会网络演化过程中试错行为的产生具有一定的触发因素,其实施必须让渡一定的成本,且总能从试错活动中积累到一定的经验。创业企业社会网络演化的试错路径呈现出多样化和无边界化,学习在创业企业社会网络演化试错的实施中发挥了重要作用。创业企业社会网络演化的试错行为受到外部动因和内部动因的双重影响。 相似文献
6.
创业企业社会网络演化图谱形成的理论假设研究 总被引：1，自引：0，他引：1
彭华涛 《科学学与科学技术管理》2010,31(6)
揭示了创业企业社会网络演化图谱形成的原因及其主要特征,从临界伸缩性、谱系漂移性等角度探讨了创业企业社会网络演化图谱的谱系重叠假设,从轴向可变性、交叉融合性等角度论述了创业企业社会网络演化图谱的边界模糊假设,从标识强制分布性、标度相对刚性等角度剖析了创业企业社会网络演化图谱的标度离散假设,并认为以上三大假设是创业企业社会网络演化图谱存在的根本前提与重要保障。 相似文献
7.
联盟组合为焦点企业及合作伙伴的发展创造了丰富的成长路径,提高了企业的竞争优势。现有研究对联盟构型网络的结构、资源冗余性、路径联系与"网络效应"之间的关系,缺乏系统性、动态性的分析。本文围绕焦点企业,结合社会网络及纵向案例研究方法以大唐移动TD-LTE联盟组合为研究对象;探讨了联盟组合构型网络形成的动因、演化特征和路径;提炼了联盟组合构型网络动态演化框架。研究表明:联盟组合内的资源异质性与构型网络多样化密切相关。随着构型网络的规模扩大、路径依赖的增加,会导致整体网络效率的下降,收益递减。而不同阶段焦点企业的控制治理策略选择、网络的拓展与重构能有效提高联盟组合"网络效应"。 相似文献
8.
以集群企业为研究对象,将网络嵌入视角延伸到公司创业前因的研究,试图探讨关系嵌入、结构嵌入以及两者的交互对于公司创业的影响效应。研究发现：（1）本地和非本地政治网络关系嵌入对公司创业有显著的正向影响,而本地与非本地商业网络关系嵌入对公司创业的影响均不显著;（2）集群企业在本地网络的规模对于非本地政治网络关系嵌入与公司创业的关系具有显著的正向调节作用;（3）本地政治网络关系嵌入对于规模较小企业的公司创业具有显著的正向影响,而对于规模较大企业的正向影响并不显著;（4）非本地政治网络对规模较大企业的公司创业具有显著的正向影响,而对于规模较小企业则无显著影响。最后讨论了研究的理论意义、实践意义以及未来研究方向。 相似文献
9.
产业网络结构是新创企业成长的直接或间接资源渠道,为创业者对创业认知、经验积累、实践检验提供了丰富的来源,而学习知识或技能的内容、模式的不同选择也对新创企业成长中的创业绩效产生一定的影响,因此研究基于产业网络结构嵌入理论和创业学习理论,构建产业网络规模、网络异质性、网络中心性、创业学习与新创企业成长间的理论关系模型,并分别探析创业认知学习、经验学习、实践学习的中介效应。基于656份新创企业实践样本数据,使用结构方程模型验证了三者之间的关系。实证结果表明:产业网络的网络规模、网络异质性与网络中心性3个维度均对新创企业绩效具有显著正向影响;网络结构的差异会影响创业者3个层面的知识获取;创业学习在产业网络中心性影响创业绩效过程中发挥全部中介效应;而创业学习在网络异质性与网络规模影响创业绩效过程中发挥部分中介作用。 相似文献
10.
源于浙江试点中心镇的小微企业创业实践,协同创业行为业已成为一个备受关注的新兴话题。话语分析方法是演化环境下,认知企业复杂行为的有效路径。由此,本文基于话语分析,聚焦中心镇视域下的小微企业,研究了协同创业行为的发生机理。主要结论有:(1)提炼得到中心镇视域下小微企业协同创业行为发生机理的话语模型,其中,要素协同、主体协同、行为协同和空间协同是4类协同因子,形成"中心镇→协同因子→协同创业行为"的创业经验证据链。(2)每一类协同因子可进一步细化为4个子范畴,如行为协同对应的子范畴是集群挤压、网络驱动、创业学习和协同治理。(3)范畴之间的关系路径包括关系网络→行为协同等强关系路径18条,空间协同→协同风险投资等弱关系路径10条。研究丰富了现有创业理论,对小微企业的协同创业实践具有启示价值。 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