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我国高技术产业的空间聚集现象研究——基于省际高技术产业产值的空间计量分析 总被引：2，自引：0，他引：2
以高技术产业规模以上企业产值(当年价)作为衡量各省区高技术产业发展水平的指标,研究我国高技术产业的空间分布特征。通过对各省区1995-2004年高技术产业产值的Theil熵和相对增长速度的计算,指出我国高技术产业发展水平的不平衡性逐渐加剧,高技术产业呈现出在少数几个省区聚集的现象。Moran指数I及Moran散点图揭示出我国高技术产业的发展水平及其增长模式都存在着明显的全局和局域空间依赖特征;并通过对2004年高技术产业产值的回归分析,进一步检验和计算空间相关性的作用强度。 相似文献
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运用仁慈型的DEA交叉效率模型,对2002~2014年长江中游城市群的高技术产业与传统工业融合效率进行了评价。研究发现,从总体上来看,长江中游城市群高技术产业与传统工业的融合效率可以分为两个阶段：第一阶段为 2002年至2007 年,高技术产业与传统工业融合效率总体上呈现稳步上升状态,第二阶段为 2008 年至 2014年,高技术产业与传统工业的融合效率呈稳步下降趋势,说明高技术产业与传统工业的融合质量在下降。从空间上来看,武汉城市圈和环长株潭城市群高技术产业与传统工业的发展处于较高水平的非均衡发展阶段,两产业融合效率呈现先上升后下降的趋势,并且武汉城市圈与环长株潭城市群相比,处于更高水平的非均衡发展阶段;环鄱阳湖城市群高技术产业与传统工业的发展处于低水平的均衡发展阶段,两产业融合效率呈现较高的稳定增长趋势。在此基础上,提出了促进长江中游城市群高技术产业与传统工业融合的政策建议。 相似文献
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《科技管理研究》2017,(12)
用仁慈型的DEA交叉效率模型,对2002—2014年长江中游城市群的高技术产业与传统工业融合效率进行评价。研究发现,从总体上来看,长江中游城市群高技术产业与传统工业的融合效率可以分为两个阶段。第一阶段为2002年2007年,高技术产业与传统工业融合效率总体上呈现稳步上升状态,第二阶段为2008年至2014年,高技术产业与传统工业的融合效率呈稳步下降趋势,说明高技术产业与传统工业的融合质量在下降。从空间上来看,武汉城市圈和环长株潭城市群高技术产业与传统工业的发展处于较高水平的非均衡发展阶段,两产业融合效率呈现先上升后下降的趋势,并且武汉城市圈与环长株潭城市群相比,处于更高水平的非均衡发展阶段;环鄱阳湖城市群高技术产业与传统工业的发展处于低水平的均衡发展阶段,两产业融合效率呈现较高的稳定增长趋势。在此基础上,提出促进长江中游城市群高技术产业与传统工业融合的政策建议。 相似文献
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我国高技术产业和制造业种群演化规律的生态研究 总被引：3，自引：0，他引：3
中国在一个制造业大国的基础上努力推动高技术产业的发展,所以高技术产业和传统制造业之间的联动演化关系对于制定良好的产业发展政策非常重要。本研究从我国高技术产业和传统制造业之间的联动演化关系出发,在两个产业演化发展规律的基础上通过传染病模型分析两种产业种群之间联动演化关系。研究发现我国的高技术产业和传统制造业之间相互促进的作用非常小,而且制造业企业数对高技术企业数的变化存在一定的限制作用,这种关系在一定程度上反映了中国产业结构的健康状况,并可为国家发展高技术产业提供一定程度的政策参考。 相似文献
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为促进区域间高技术产业协同发展持续稳定,本文基于改进Lotka－Volterra模型来研究区域间高技术产业协同发展关系的稳定性条件,并以长株潭区域间高技术产业协同发展为案例进行分析。研究表明：区域间高技术产业协同发展系统存在不稳定、鞍点均衡、长期稳定等多种状态;区域间协同影响系数的乘积小于1,是高技术产业协同发展系统稳定的关键条件。政府部门应针对区域间高技术产业协同发展关系稳定性的不同状态,发挥区域不同优势,制定差异化政策,优化区域间高技术产业专业化分工,为协同发展关系维持稳定,甚至向更高层次演化提供重要指引。 相似文献
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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
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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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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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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
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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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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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《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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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
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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