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杨凤华 《科学．经济．社会》2014,(1):141-146
从国家战略层面推进江苏沿海开发,需要进一步增强连云港、盐城和南通三个中心城市在区域经济发展中的对外服务功能,强化其在区域发展中的辐射带动作用。生产性服务业是当今体现区域中心城市对外服务功能强弱的核心门类,江苏沿海地区三个中心城市应紧抓国家战略机遇,通过优化区域分工、强化产业集聚、深化体制改革等途径,加快提升生产性服务业发展水平,努力增强中心城市在区域经济发展中的对外服务功能。 相似文献
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创新型城市是指在新经济条件下,以创新为核心驱动力的一种城市发展模式.一般是指由区域科技中心发展演变而来,在积聚和配置创新资源,不断形成自我平衡调整和发展功能的基础上,推动建立创新驱动的集约型城市经济增长模式,最终实现城市可持续发展.浅析惠州建立创新型城市的选择的必然性,建设成果、机遇、挑战、工作建议等方面的研究内容,希望对惠州建立创新型城市的深入研究有所帮助. 相似文献
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沿边城市的开发开放是地缘环境优势下区域发展的重要内容,厘清边境城市产业发展、园区发展的地缘环境优势,构建清晰的政府-市场互动导向的开发思路,提出系统科学的产业发展和功能布局框架对城市的有效增长和区域增长极的打造具有重要的战略价值.地处东北亚中俄贸易关键地位的牡丹江市在产业发展追赶和跨越上具有区位条件优越、对外交通通达、外贸基础深厚、市场前景看好的地缘环境优势.在东北亚地缘合作与东北地区振兴的历史机遇下,牡丹江的产业定位和发展,要立足大东北,面向东北亚,充分发挥对俄贸易的比较优势,承接沿海地区的产业转移,以资源条件和市场优势为依托,在现有产业基础上拓展产业链条,巩固优势产业、发展新兴产业、集聚园区建设、整合发展力量,有目标有步骤地做好地缘优势下产业发展带动区域经济发展和次区域合作的模范. 相似文献
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创新型城市是创新资源高度集聚的一种城市发展形态,是城市发展走向知识化现代化的产物.面对新一轮经济竞争的挑战和机遇,提升区域自主创新能力,转变经济增长方式,加快建设创新型城市,增强城市综合竞争力,是实现长沙社会经济健康发展的迫切要求.文中立足长沙市城市发展现状,结合长沙市建设创新型城市的发展战略,指明长沙创新型城市的建设重点,并对长沙市的创新型城市建设提出相应的对策和建议. 相似文献
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基于乌鲁木齐市城市发展与水资源开发利用历史数据,采用系统动力学方法,构建干旱区绿洲城市发展与水资源需求预警系统仿真模型,并对乌鲁木齐市城市发展的水资源需求进行多情景模拟。模拟结果显示：①现有水资源条件难以满足城市发展的需要,各情景下水资源对城市发展系统均存在较强约束,采用调水与节水方案,乌鲁木齐市中、高速发展情景下到2030年将分别存在5.17亿m3、30.15亿m3的水资源缺口;②节水方案对水资源开发利用潜力提高的效果远大于调水的效果,社会经济发展越快,节水带来的效果越明显;③适度增强城市人口和产业的集聚与规模效应,降低用水定额,提高水资源利用效率,是提高水资源开发利用潜力最有效的途径;④通过跨流域调水提高区域的供水能力,有助于减弱水资源系统对城市发展系统的约束作用。 相似文献
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基于乌鲁木齐市城市发展与水资源开发利用历史数据,采用系统动力学方法,构建干旱区绿洲城市发展与水资源需求预警系统仿真模型,并对乌鲁木齐市城市发展的水资源需求进行多情景模拟。模拟结果显示:①现有水资源条件难以满足城市发展的需要,各情景下水资源对城市发展系统均存在较强约束,采用调水与节水方案,乌鲁木齐市中、高速发展情景下到2030年将分别存在5.17亿m3、30.15亿m3的水资源缺口;②节水方案对水资源开发利用潜力提高的效果远大于调水的效果,社会经济发展越快,节水带来的效果越明显;③适度增强城市人口和产业的集聚与规模效应,降低用水定额,提高水资源利用效率,是提高水资源开发利用潜力最有效的途径;④通过跨流域调水提高区域的供水能力,有助于减弱水资源系统对城市发展系统的约束作用。 相似文献
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城市是人类文明、社会进步的象征和生产力的空间载体.无论是世界其他国家还是中国,经济重心主要集中在城镇集聚区.可以认为,只有城市及其集聚区的持续发展,才会有区域的持续发展、国家的持续发展乃至于全球的持续发展.面对21世纪全球城市时代的形势,城市问题更成为可持续发展最为关注的主题之一.经济全球化是世界经济发展的趋势.本文指出了这种发展趋势有利于环境保护和可持续发展,但在某些条件下也会给环境保护和可持续发展带来一定的负效应.经济全球化反映了生产力内在发展的要求,提出了要抓住经济全球化机遇,切实重视科技创新,最大限度地发挥经济全球化对可持续发展的积极影响,克服其消极影响,推动人类的可持续发展,形成经济发展和生态环境保护的良性循环. 有城市及其集聚区的持续发展,才会有区域的持续发展、国家的持续发展乃至于全球的持续发展.面对21世纪全球城市时代的形势,城市问题更成为可持续发展最为关注的主题之一.经济全球化是世界经济发展的趋势.本文指出了这种发展趋势有利于环境保护和可持续发展,但在某些条件下也会给环境保护和可持续发展带来一定的负效应.经济全球化反映了生产力内在发展的要求,提出了要抓住经济全球化机遇,切实重视科技创新,最大限 地发挥经济全球化对可持续发展的积极影响,克服其消极影响,推动人类的可持续发展,形成经济发展和生态环境保护的良性循环. 有城市及其集聚区的持续发展,才会有区域的持续发展、国家的持续发展乃至于全球的 相似文献
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城市土地利用效率影响区域一体化中的要素流动方向和产业发展态势,土地利用效率的提高是驱动一体化发展的重要因素。如何有效协调长三角一体化和土地利用的良性关系,成为学界的研究热点。因此,本文基于区域一体化与城市土地利用效率的协同机理分析,构建区域一体化与土地利用效率效率评价体系,解析其时空演变特征;通过灰色关联分析验证了两者之间的关系,采用面板VAR模型探究交互响应机制。结果表明：①研究期内长三角一体化水平不断提升,“核心-外围”极化特征显著;城市土地利用效率上升明显,与一体化的演化趋势吻合。受区位条件、经济水平与资源等多种要素影响,区域一体化与土地利用效率的空间格局匹配失衡。②区域一体化与土地利用效率具有中高等级的关联度,两系统之间存在一定的关联。③长三角一体化与土地利用效率两系统间正负波动交替的非线性交互特征明显,其中区域一体化对土地利用效率具有负向累进的冲击效应,而城市土地利用效率对一体化冲击的正向增强效应逐渐减弱并收敛为0。根据上述研究结果,制定了差异化的长三角区域一体化发展和城市土地利用管控策略,以期为促进区域协调发展与城市土地高效利用提供科学参考。 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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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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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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《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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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)
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