共查询到20条相似文献，搜索用时 62 毫秒
1.
《科技管理研究》2020,(8)
针对产业集群与颠覆性技术创新之间的影响机制展开研究,通过调整产业集群创新网络结构促进产业集群内部颠覆性技术创新的发生,改善产业集群发展现状。基于社会网络理论建立创新网络结构、双元性学习、颠覆性创新三者之间的理论模型,以上海"张江药谷"医药行业134家企业、研究机构等作为调研样本,通过问卷调查以及专利分析收集样本数据进行实证分析。通过多元回归分析检验发现,"张江药谷"医药行业创新网络结构的位置中心性、网络稳定性以及网络结构洞3个网络性质对颠覆性创新具有显著的正向影响;利用式学习在创新网络结构的位置中心性、网络稳定性以及网络结构洞与颠覆性创新之间起中介作用;探索式学习在位置中心性、网络稳定性与颠覆性创新之间起中介作用,在网络结构洞与颠覆性创新之间没有中介效应。以期对帮助企业通过改善创新网络结构、促进颠覆性创新提供参考。 相似文献
2.
《科学学与科学技术管理》2021,(2)
通过运用跨时点的问卷收集方式对306位创业者进行了调查,以探索创业拼凑对节俭式创新的作用机制,并分析了双元创业学习的中介作用和创业努力的调节作用。研究结果表明:(1)创业拼凑对探索式创业学习、利用式创业学习和节俭式创新均具有显著的正向影响;(2)探索式创业学习、利用式创业学习分别在创业拼凑与节俭式创新之间起中介作用;(3)当创业学习强度一致时,创业者的节俭式创新在"高探索—高利用"的情况下比"低探索—低利用"的情况更高;当创业学习强度不一致时,创业者的节俭式创新在"低探索—高利用"的情况比"高探索—低利用"的情况更高;探索式创业学习与利用式创业学习越一致,创业者的节俭式创新越高;(4)创业努力正向调节创业拼凑与利用式创业学习之间的关系,而在创业拼凑与探索式创业学习之间不显著。 相似文献
3.
失败经验是一种宝贵的创业经验,可为后续创业活动提供具有高价值的隐性知识,提高了企业后续创新绩效。基于知识管理理论和组织学习理论,立足于创业失败学习与国际新创企业后续创新绩效之间的关系,构造了一个多重中介模型探究了创业失败学习、知识库、知识应用对国际新创企业后续创新绩效的作用机制。本文采用问卷调研法,以198份具有创业失败经验的国际新创企业作为样本,通过spss21.0 软件和Mplus7.0软件,对模型加以验证。结果表明：第一：创业失败学习与国际新创企业后续创新绩效具有显著的相关关系;第二：知识库和知识应用在创业失败学习和创新绩效之间起链式中介作用;第三：在考虑了知识库和知识应用的情况下,创业失败学习与创新绩效之间的关系不显著。研究模型打开了创业失败学习和后续创新绩效间的黑箱,对于创业者更好的进行创业失败学习以促进企业后续创新发展带来了一定的启发。 相似文献
4.
基于组织学习理论，构建创业学习对新创企业成长的影响机制模型，并引入创业机会识别和商业模式创新作为中介变量，利用八省749份问卷调查数据进行实证分析，探索创业学习对新创企业成长的作用机理。结果显示：创业学习对新创企业成长具有正向影响；创业机会识别、商业模式创新在创业学习和新创企业成长关系中起部分中介作用；创业机会识别和商业模式创新在创业学习与新创企业成长之间起链式中介作用，创业机会识别对创业学习与商业模式创新间关系起正向调节作用，商业模式创新对创业机会识别与新创企业成长间关系起正向调节作用。 相似文献
5.
在不同的行业中遍布着形态各异的创新网络，网络内部不断地进行着知识交流以及合作创新，为各行业的科研创新提供动力。本文以社会网络理论为基础，建立创新网络结构、双元性学习、颠覆性创新三者之间的理论模型。本文样本数据来源134家上海张江“药谷”医药行业企业、研究机构的专利分析以及问卷调查，通过多元回归分析进行实证检验，发现创新网络结构的位置中心性、网络稳定性以及网络结构洞对颠覆性创新具有显著的正向影响，利用式学习在创新网络结构的三个子变量位置中心性、网络稳定性以及网络结构洞与颠覆性创新之间起中介作用，探索式学习在位置中心性、网络稳定性与颠覆性创新之间起中介作用；在网络结构洞与颠覆性创新之间没有中介效应。从而帮助企业通过提高创新网络结构性质，促进颠覆性创新。 相似文献
6.
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
7.
基于组织内部视角,影响文化科技企业技术创新能力的因素具有跨层次的特点,通常领导者通过组织层面影响一般员工,因此构造"企业家素质——组织创新氛围、组织学习能力——员工创新行为"跨层次分析模型,运用SPSS和HLM软件探索4个影响因素之间的作用机制。结果表明,企业家素质与员工创新行为显著相关,组织创新氛围与组织学习能力在企业家素质和员工创新行为之间起到部分中介作用,四大因素之间存在一定的跨层次作用机制。 相似文献
8.
9.
建立市场知识、定向跨组织学习与服务创新水平之间关系的模型,采用回归方法对四川省内122家制造业企业进行实证分析。研究结果显示,市场知识、定向跨组织学习有助于企业服务创新水平的提升,定向跨组织学习在其中起中介作用。企业大小在市场知识对定向跨组织学习、市场知识对服务创新水平的作用中均有正向调节效应,行业类别在市场知识对定向跨组织学习的作用中有调节效应。 相似文献
10.
在相关文献回顾的基础上,构建了联盟组合网络结构（网络联系、网络规模）与创新能力的理论模型,对联盟组合的网络结构与创新能力之间的直接作用进行了剖析,并探讨了吸收能力、跨界搜索在网络联系、网络规模及创新能力之间的中介及调节作用．同时,探究了跨界搜索是否对网络联系、网络规模与创新能力直接作用和间接作用存在调节作用．研究表明：网络联系、网络规模均能够对创新能力产生积极影响;吸收能力在网络联系、网络规模与创新能力之间发挥部分中介作用．同时,跨界搜索能够正向调节吸收能力与创新能力的关系;跨界搜索在网络联系与创新能力之间发挥正向调节作用;跨界搜索对网络规模与创新能力的调节作用,仅在高跨界搜索水平时存在．跨界搜索对网络结构与创新能力间接作用的调节效应没有得到支持．因此,企业应该重视和平衡联盟组合网络结构对企业创新能力的作用,加强组织学习和跨界搜索,充分利用组织的网络效应,实现企业开放式创新与价值创造． 相似文献
11.
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
12.
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
13.
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
14.
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
15.
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
16.
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
17.
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
18.
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
19.
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
20.
《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献