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针对推动经济高质量增长与实现生态可持续发展重要战略结合点的绿色创新效率问题,运用SBM模型,构建以高技术产业集聚为门槛变量的面板门槛模型,测算2008-2018年我国28个省份高技术产业绿色创新效率,实证分析创新质量对高技术产业绿色创新效率的影响机理.结果 表明:在研究期内,28个省份高技术产业绿色创新效率稳步提升但尚有较大提升空间,并存在明显的空间差异特征,其中绿色创新效率东部地区＞中部地区＞西部地区;创新质量对东、中部高技术产业绿色创新效率存在基于产业集聚水平的双重门槛效应,门槛值分别为0.636、0.944,而西部当高技术产业集聚水平跨越0.363门槛值时,创新质量对绿色创新效率才会有显著促进作用;企业规模、劳动者素质、政府行为对高技术产业绿色创新效率具有显著正向影响,对外开放显著抑制绿色创新效率提升.最后基于研究结论,提出综合考虑区域发展差异、充分发挥协同优化作用、积极实施人才引进战略等促进我国高技术产业绿色创新效率提升的对策建议. 相似文献
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摘要：绿色创新已成为推动经济高质量增长与实现生态可持续发展的重要战略结合点。运用SBM模型测算2008-2018年全国内地28省市高技术产业绿色创新效率,构建以高技术产业集聚为门槛变量的面板门槛模型,实证分析创新质量对高技术产业绿色创新效率的影响机理。结果表明：国内高技术产业绿色创新效率在研究期内稳步提升,但尚有较大提升空间;高技术产业绿色创新效率存在明显的空间差异特征,绿色创新效率东部地区>中部地区>西部地区;创新质量对高技术产业绿色创新效率的影响存在基于高技术产业集聚水平的双重门槛效应,企业规模、劳动者素质、政府行为对绿色创新效率具有显著正向影响,对外开放显著抑制绿色创新效率提升。 相似文献
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利用我国30个省份2008~2017年的数据,构建Super-SBM模型测度各区域绿色技术创新效率,进而利用门槛面板模型,以环境规制和产业集聚为门槛变量,实证研究贸易对区域绿色技术创新效率溢出的非线性影响。结果表明：(1)从效率值来看,我国绿色技术创新效率增长迅速,但区域发展“不平衡性”严重,东部地区的效率值遥遥领先于中西部地区；(2)从门槛结果来看,贸易对区域绿色技术创新效率的溢出显著存在环境规制、产业集聚的“双门槛”效应；(3)从作用机制来看,环境规制下的贸易与绿色技术创新效率呈“U”型关系,随着环境规制强度提高,溢出的“挤出效应”逐步转为“激励效应”,影响由负变正且作用逐渐增大；产业集聚下的贸易与绿色技术创新效率呈“N”型关系,仅当产业集聚水平跨过第二门槛时,影响显著为正；环境规制对绿色技术创新效率表现为显著的直接推动作用和间接门槛作用,产业集聚对绿色技术创新效率仅表现为间接门槛作用。 相似文献
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经济高速发展带来的环境污染问题,制约了经济的可持续发展,从产业集聚外部性出发结合产业发展周期理论,借助2008-2015年73个PM2.5重点监测城市的面板数据,实证检验产业集聚对雾霾污染的门槛效应,研究发现：(1)产业集聚对雾霾污染具有显著双重门槛效应,当产业集聚水平位于第一、第三区间时,产业集聚具有显著正外部性;当产业集聚水平位于第二门槛区间时,产业集聚对雾霾污染表现为正向影响,但并不显著。(2)环境规制力度与雾霾污染显著负相关。进而提出注重产业集聚动态演进变化,动态调整产业集聚水平;制定严苛环境规制政策,引导产业绿色转型的政策建议。 相似文献
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在测度我国30个省域近10年创新要素集聚水平和创新绩效的基础上构建"创新要素集聚-创新绩效"拟合模型,基于Q型聚类法证实不同类型区域溢出效应均存在门槛值,并得出我国创新要素集聚的最优水平。结果表明,我国区域创新要素集聚已形成多层次的分布格局,区域之间的集聚水平差距较大;创新要素集聚对区域创新绩效的溢出效应并非单调递增或递减,而是呈现倒"U"型趋势;在不同的集聚水平层级下,创新要素集聚对创新绩效的溢出效应门槛值存在差异;当创新要素集聚水平达到门槛值时,创新绩效最大,此时为最优集聚水平。 相似文献
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《中国科技论坛》2020,(4)
基于2009—2016年中国省级面板数据,实证检验产业协同集聚对区域绿色创新的影响及区域差异。运用考虑非期望产出的SBM模型测算各地区的绿色创新效率以衡量区域绿色创新水平,基于产业协同集聚指数和绿色创新效率两个指标,将30个省份聚类划分为四种发展模式;在控制了地区经济增长水平、外商直接投资、人力资本水平、政府支持力度以及环境规制等变量后,回归结果表明,产业协同集聚显著促进了区域绿色创新的提升;分区域回归结果显示,产业协同集聚对区域绿色创新的影响存在显著的区域差异,产业协同集聚对东部地区绿色创新的影响高于中西部地区;中西部地区需进一步发挥要素投入在产业协同集聚中的作用,激发创新活力,提高区域绿色创新水平。 相似文献
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本文基于2006-2012年省级面板数据,采用Super-SBM模型测度环境约束下中国高技术产业绿色创新效率;在此基础上构建门槛模型实证分析RD投入强度对其产生的影响。结果表明:Super-SBM模型度量的高技术产业绿色创新效率符合实际,八大经济区域高技术产业绿色创新效率存在地域差异;以企业规模为门槛变量,RD投入强度对高技术产业绿色创新效率具有双重门槛效应,市场环境、政府资助、产业集聚均与高技术产业绿色创新效率显著正相关,而劳动者素质影响不明显。 相似文献
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在分析公共服务供给对区域绿色发展作用机理的基础上，利用2010—2020年中国省域面板数据，建立空间杜宾模型，从高技术产业集聚视角实证检验公共服务供给对区域绿色发展的影响。结果显示：（1）公共服务供给和高技术产业集聚均可以促进当地绿色发展，并对周边地区产生正向溢出效应。（2）高技术产业集聚在公共服务供给和区域绿色发展之间发挥中介作用，即公共服务供给的规模、结构和质量，有助于促进高技术产业的集聚，从而推动区域绿色发展。（3）高技术产业集聚与区域绿色发展间存在非线性关系，不同门槛值下高技术产业集聚对区域绿色发展的促进作用不同，当集聚程度超过门槛值时，对区域绿色发展的影响呈现递减效应。（4）不同类型的公共服务对区域绿色发展的作用存在差异性，相对于基础设施类公共服务，民生类公共服务对区域绿色发展的促进效用更为显著；另外，公共服务供给对区域绿色发展影响也存在区域异质性特征，东、西部和东北地区公共服务供给水平的提升对区域绿色发展的影响显著为正，而中部地区没有体现明显的促进作用。 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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《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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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)
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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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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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