共查询到20条相似文献，搜索用时 62 毫秒
1.
运用生命周期理论,较为详细地分析了文化创意产业集群演化的各阶段特征,同时为了揭示企业间在集群生命周期各阶段竞争与合作的稳定性,运用Kolmogorov种群相互作用模型分析稳定共生的条件,并在此基础上得出促进集群各阶段稳定发展的对策建议。 相似文献
2.
产业技术创新联盟的核心是焦点企业,而产业技术创新联盟能否高效运行关键就在于焦点企业能否选择恰当的合作共生伙伴组成合作共生体,决定了产业技术创新联盟的成败,也决定了联盟功能的整体发挥。本研究在阐述焦点企业的内涵及其在产业技术创新联盟中的作用基础上,根据合作伙伴对联盟效益的贡献大小,利用Shapley值法对合作收益进行分配,形成了综合效益转移机制。综合效益转移机制保证了所有合作共生主体都能从合作共生中获得合理的收益,实现了合作共生主体的互利共生,这是合作共生主体参与合作并推动产业技术创新联盟发展的根本动力,这也是焦点企业进行合作共生伙伴选择的重要动因。 相似文献
3.
要提高产业集群创新绩效、提升创新能力,就有必要吸引企业、大学和科研机构、中介机构及政府等创新主体及创新资源汇入并形成创新生态系统。而如何提升系统的创新绩效,实现可持续发展,关键在于系统群体间以何种方式进行联系以建立起共生关系并维持系统良好运行。为此,借助生态共生理论,提出了基于城市创新的集群生态系统概念模型。根据企业、大学和科研机构、中介机构及政府等群体在产业创新过程中的作用与参与程度的不同,界定了共生单元,在共生环境的作用下,它们之间通过物质、能量、信息等交换、交流方式构成互惠共生模式。为了提高系统内共生体间物质流动、能量转换及信息交流的速度与效率,需要建立起共生关系生成机制、共生关系反应机制及共生能量调节机制等共生机制来确保系统功能的实现。在特定的城市创新的环境下建立起有效的共生机制以促进高质量的共生关系生成并促进系统良好运行,可实现合作创新高效进行,从而带动产业集群创新能力的提高。 相似文献
4.
通过建立扩展的Logistic模型,描述不同共生关系下的集群内企业间的成长情况,并进行生态稳定性分析。研究发现集群在对称互利共生且企业独立成长的情形下,企业的质参量水平最高,也是最和谐稳定的。通过对共生关系的分析,提出产业集群生态共生稳定平衡的两点重要条件,其一集群内企业间必须保持一定的差异性,其二集群内企业必须协作与竞争并存。 相似文献
5.
为研究海陆产业的协同共生发展,目前的研究大多采用灰色关联度模型和耦合协调度模型分析其关联度和协调度,定量分析海陆产业协同共生发展的研究较少,且选择单一指标进行分析,难以完整反映海陆产业的协同状况。为此,从经济发展、科技水平和生态环境3个方面建立海陆产业系统综合评价指标体系,构建复合系统下的海陆产业协同共生模型,以江苏省海陆产业为研究对象,对两系统的协同共生状态和共生模式进行研究。结果表明,江苏省海陆产业系统整体上呈现出合作互惠效应大于竞争抑制效应,江苏海陆产业系统目前处于互利共生的状态;海洋产业系统对陆域产业系统的影响小于陆域产业系统对海洋产业系统的影响,两系统处于非对称互惠共生状态,并向对称互惠共生状态发展。 相似文献
6.
基于Logistic增长模型的工业共生稳定分析 总被引：17，自引：0，他引：17
类似于生物种群的共生进化过程，生态工业系统演进过程中出现了企业间相互利用资源的互补共生现象。运用生物学中描述生物种群增长规律的Logistic方程，建立描述企业间相互作用关系的数学模型，给出平等型、依托型、依赖型和单方获利型四种工业共生模式的稳定共生条件和政策含义，对于我国生态工业发展具有指导意义。 相似文献
7.
8.
基于演化博弈理论的产业集群中竞争与合作关系分析 总被引：2，自引：1，他引：1
产业集群中的企业一方面可以通过合作从集聚中获益,然而企业在产业中集聚也从一定程度上容易形成恶性竞争等不良企业行为.利用演化博弈理论分析现代产业集群中的企业竞争与合作行为,指出群内企业在良性和稳定的集群内部环境中可以承受一定的外部环境的冲击,企业个体要想实现合作共赢的局面,必须转变理念,从长远的视角考虑企业间的竞争与合作行为,才能最终达到竞争和合作的均衡,从而使该产业集群整体不断向前发展. 相似文献
9.
生态工业园区产业共生链网结构模式研究 总被引：2，自引：1，他引：1
生态产业链的结构决定整个园区工业生态系统的稳定性和可持续性,因此,研究生态产业链的结构对于促进生态工业园的健康发展具有重要的现实意义.本文首先分析了生态工业园区产业共生链网结构模式,随后探讨了生态共生链网的平衡、稳定与发展,最后提出了对生态工业园区产业共生链网结构模式设计的建议. 相似文献
10.
为明晰区块链产业生态系统构成要素和演化路径,基于价值共创和动态研究视角,运用生态学的Logistic方程构建区块链产业生态系统共生演化模型,分析系统演化均衡点及均衡条件,并通过计算机仿真模拟不同演化模式的发展趋势,揭示区块链产业生态系统共生演化规律。结果表明：（1）区块链产业生态系统是由价值中枢层、价值融合层、价值服务层3类价值主体在一定的共生环境中围绕价值获取和创新互动而共同创造价值的复杂系统;（2）3类价值主体之间共生度的大小决定了区块链产业生态系统共生演化的稳定性和均衡状态;（3）互利共生模式能够最大程度发挥3类价值主体协同作用,系统成员应致力从寄生共生和偏利共生模式转换到互利共生模式。为促进区域区块链产业创新资源整合和产业融合发展,提出对于区块链产业生态系统,企业应充分平衡种群共生演化动力、优化共生环境、制定和完善高效的协同创新机制等对策建议。 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