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本文利用2006—2010年我国31个省、自治区、直辖市数据,通过相对多样化指数和生态位适宜度模型,对生产性服务业与制造业双重集聚的协调度与生态位适宜度进行分析。结果表明:我国生产性服务业与制造业双重集聚的协调度和生态位适宜度表现出较大的区域差异,东部一些经济发达地区的生态位适宜度不高,反而中西部一些地区的生态位适宜度较高,说明东部发达地区在追求经济增长的同时忽略了第二、三产业的协调发展。因此,要大力发展生产性服务业,并形成第二、三产业协调发展的格局,形成梯度式发展规划,使各区域的产业集聚协调发展。 相似文献
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运用耦合度和耦合协调度模型,研究了全国及各省区城镇化与资源环境承载力的耦合关系,得出如下结论:第一,全国及大部分省区城镇化水平超出资源环境的承载水平,资源环境承载力对城镇化的支撑能力有限;第二,全国及各省区城镇化与资源环境承载力处于拮抗阶段,二者的相互作用关系比较剧烈,既存在胁迫效应,也存在约束作用;第三,城镇化与资源环境承载力耦合协调度呈现东部>西部>中部的空间格局,全国属于轻度失调型,大部分省区属于轻度和中度失调型。提出如下对策建议:在新常态下推进城镇化适度适速发展、创新“土地红利”模式;以生态文明建设为契机实现资源可持续利用、加强环境污染治理、构筑生态安全屏障。 相似文献
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马宏 《内蒙古科技与经济》2023,(17):38-42+67
普遍信任是影响“金融-产业转型升级”耦合协调度的重要因素。利用中国1999—2018年省际面板数据对普遍信任与“金融-产业转型升级”耦合协调关系进行的实证分析结果显示：普遍信任水平的提高有利于提升“金融-产业转型升级”耦合协调度。但普遍信任对“金融-产业转型升级”耦合协调度的影响程度会受到经济制度水平的约束。经济发展水平、经济开放水平和人力资本的提高也可以有效提升金融与产业转型升级的耦合协调水平。建议除了大力发展金融和产业内部的相关因素外，还可以采取提升社会普遍信任水平，大力发展经济，加大改革开放力度，发展高等教育，多措并举，共同促进金融与产业转型升级耦合协调发展。 相似文献
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首先阐述区域生态、经济与金融三个子系统的耦合作用机理,然后借鉴物理学中的耦合度函数,利用熵值赋权法构建生态-经济-金融系统的耦合协调度模型,并以鄱阳湖生态经济区为例进行实证研究。研究结果表明,该地区生态-经济-金融耦合度和协调度水平较低,经济发展水平是影响三者耦合协调程度的重要原因,金融对该区域耦合协调度的贡献不显著。最后提出鄱阳湖地区生态、经济与金融耦合协调发展对策。 相似文献
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基于可视化技术对态势感知系统的支撑机制,构建林业产业生态位演化因子的态势感知可视化模型,以提取并识别合理的、科学的、适宜的林业产业生态位演化因子,为林业产业环境优化和生态位"扩态增势"提供整合性的决策依据。研究表明:第一,林业产业生态位演化是由资源、需求等利导因子,技术、政策和体制等限制因子共同推动,不同因子的优势度存在较大差异;第二,要不断强化高优势度的因子,也要持续关注低优势度的因子,以实现东北国有林区林业产业生态位优化和林业产业正向演化。 相似文献
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文章构建了我国生态—经济—科技系统耦合协调发展评价指标体系,采用熵值法进行客观赋权,然后引入耦合协调发展的函数模型,测算了2014年我国省域生态—经济—科技系统的耦合度和协调度,最后借助空间计量模型对耦合协调度的影响因素进行回归分析。研究结果表明：(1)我国省域生态—经济—科技系统耦合度多处在拮抗时期,发展特点表现为生态环境逐渐被破坏,承载力变小;(2)我国省域生态—经济—科技系统耦合协调度基础处于勉强协调状态;(3)经济结构、经济效益以及科技成果转化水平是影响耦合协调度的突出因素。 相似文献
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采用熵权法、耦合协调模型，对2008年—2018年珠三角九市各城市子系统的综合得分与耦合协调度进行测算，从时序角度来探讨三个系统之间的耦合协调状况及其分布特征。研究发现：珠三角九市在11年间的生态-经济-科技创新耦合协调度变化相对稳定，整体呈现耦合协调度“中间高，周围低”的空间特点；从协调发展及滞后类型可知，处于濒临失调衰退类型的城市常常属于生态滞后型，而处于中度或轻度失调衰退类型的城市常处于科技滞后型，各城市突破失调状态的瓶颈不同。未来需实现生态、经济、科技深层次的联动合作,促进创新区域生态经济的协调发展。 相似文献
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基于系统动力学视角构建中国人工智能产业创新能力与融资环境仿真系统,采用耦合协调度模型分析产业创新能力与融资生态的耦合演进阶段,并探索不同创新情景对融资环境耦合协调阶段的影响效果。研究结果表明:(1)中国人工智能产业创新能力与融资环境长期处于基本协调和中度协调状态,系统仿真结果预测将于2019年跨入高度协调。(2)创新能力的增量改变对系统耦合协调程度有不同程度的正向改善作用,创新资源的拉动作用最为显著,人工智能产业的生态情境依赖性决定了政府在对资金量总体供给进行适度引导的同时应避免陷入"政府干预陷阱"。 相似文献
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黄河流域面临的水、能源和粮食问题非常突出,研究黄河流域水-能源-粮食耦合协调发展有助于推动黄河流域的生态保护和高质量发展。本文首先分析黄河流域水-能源-粮食耦合协调发展机理,构建相应的耦合协调发展评价指标体系;在此基础上,运用耦合协调度模型测算了2008—2018年黄河流域水-能源-粮食耦合协调发展状况,并分析其时间和空间演变特征;最后,利用灰色预测GM（1, 1）模型对其耦合协调发展状况进行模拟。结果表明：①2008—2018年黄河流域水-能源-粮食基本处于稳定的高水平耦合状态,2010年由初级协调转变为中级协调,2018年由中级协调转变为良好协调。②省区间的耦合协调发展水平差异较大,宁夏仅为勉强协调,河南、陕西和甘肃为初级协调,山西、内蒙古、山东和青海为中级协调。③2019—2023年除陕西外,其余各省区水-能源-粮食耦合协调度预计将呈缓慢上升的趋势。本文根据各省区的水-能源-粮食耦合协调特征提出了相应的政策建议。 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
13.
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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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
15.
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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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
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