共查询到20条相似文献，搜索用时 750 毫秒
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基于空间溢出效应,构建了创意产业集聚、外部性(技术外部性、金融外部性、文化外部性)与区域创新的作用机理,检验了长三角创意产业集聚与区域创新的关系,并考察外部性调节效应的产业差异.研究发现:(1)创意产业集聚显著地正向影响区域创新,金融外部性空间溢出效应显著;(2)创意产业集聚水平相同条件下,外部性越强,创意产业集聚对区域创新水平提升强度越大;(3)创意产业集聚促进区域创新存在产业差异,其中科学研究类创意产业最为明显;(4)外部性对创意产业集聚与区域创新关系的调节作用因创意产业具体的类别而有所差异.研究关于充分利用外部性,引导城市创意产业集聚,推动区域创新具有参考价值. 相似文献
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国际化战略、多元化战略与企业绩效 总被引：3，自引：0，他引：3
以我国318家制造业上市公司1999-2008年期间的纵向数据,考察国际化、多元化与企业绩效之间的关系。研究表明国际化程度与企业绩效之间存在着S型曲线关系。随着企业国际化程度的提高,国际化对绩效最初具有负影响,然后变为正影响,最后又转变为负影响。多元化负向调节国际化与绩效之间的曲线关系。在低度多元化企业,国际化与绩效之间存在着显著的S型曲线关系;在中度多元化企业,国际化与绩效之间存在着U型曲线关系;在高度多元化企业,国际化与绩效之间的关系变为略微向上倾斜的平坦直线。这表明随着多元化程度的提高,国际化对绩效的影响逐渐减弱。从整体上看,国际化程度与我国制造业企业绩效之间的S型曲线在起始阶段显著向下倾斜,这表明实施国际化战略对于我国许多制造业企业来说绝非易事,需要企业以长远的眼光看待国际化,并在国际化战略实施过程中付出持之以恒的努力。 相似文献
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阐述了产业集聚如何影响产业创新绩效的理论机制,探讨市场化进程和政府干预对产业集聚和产业创新绩效的调节效应.使用2011—2016年中国制造业省级数据来进行面板回归,结果印证了产业集聚程度与产业创新绩效的倒U型关系,并经研究发现:市场化进程对两者关系具有显著正向调节作用;政府干预对两者关系具有显著负向调节作用.这些发现具有重要政策含义:在产业集聚程度较低阶段,减少政府干预,充分发挥市场机制作用能较大程度地推动创新;当集聚过度而损害产业创新绩效时政府应积极干预,控制产业创新绩效降幅. 相似文献
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中国装备制造业地理集聚:测度与绩效评价 总被引：3，自引：0，他引：3
集聚式发展是中国装备制造业的一个重要特征.本文利用空间集聚指数法和产业集聚结构效益指数、集聚影响指数和区位熵对2003-2008年中国装备制造业的地理集聚及其绩效进行了测度与评价.结果表明:中国装备制造业平均地理集聚度较高且上升明显,但不同行业的地理集聚度及其变化存在明显的差异;中国装备制造业地理集聚的结构效益在下降,各地区装备制造业产业集聚结构素质和产业集聚专门化率差异明显且变化趋势不同.装备制造业的地理集聚度与绩效变化及其区域差异可以为政府的产业集聚政策提供决策依据. 相似文献
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企业创意一直是企业创新实践中容易被忽视的因素之一,本研究基于企业创意的视角分析了知识流入对于企业创新绩效的影响作用.实证结果表明:企业创意在知识流入与企业创新绩效之间产生部分中介作用.此外,在不同企业规模与研发投入的情况下,企业创意对于知识流入与企业创新绩效之间的中介作用差异也较大,尤其是在规模较小和研发投入较少的企业中,企业创意将不会对知识流入与企业创新绩效产生中介作用. 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
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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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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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Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献