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1.
《科技与管理》2017,(1)
应用对应分析法,运用SPSS生成城市职能分工的点聚图,并得出反映城市间潜在职能互补性的统计量"总惯性",对2005年和2014年长三角城市群内城市职能分工体系特征、格局及变化进行分析,并对区域内2005—2014年城市职能互补性及变化特征进行分析。结果显示,在10年间,长三角城市群内的信息服务、商贸、金融等高端服务业逐渐转变为专业化职能,并向区域内核心城市集中,与此同时,工业制造业也向苏锡常及宁波都市圈集聚,转变为都市圈专业化职能,区域内分工格局得到优化。长三角城市群总惯性的演变特征呈"波峰波谷"交替的模式,总体上显示区域内城市间潜在职能互补性不断提高,但相对来说城市间职能分工水平仍较低。 相似文献
2.
标准是重要的软联通形式。立足标准合作实现城市间联动，是促进区域内经济一体化的重要路径。以长三角27个城市为研究对象，基于联合制定标准数量和经济联系强度数据，运用社会网络分析方法，构建了2016—2020年标准合作网络和经济一体化网络，揭示其空间结构的演化特征及城市角色的演变规律，并运用二次指派程序（QAP）和格兰杰因果检验方法，探讨长三角区域内两者空间协同演进关系。结果表明：长三角城市群的标准合作和经济联系拥有大致相同的空间分布特征，城市间地理区隔被突破，大范围共享融合得以实现，但经济一体化领先于标准合作；长三角城市群呈现出空间分异状态，网络东密西疏，中心城市以自身优势展示出较强的辐射溢出能力，核心—边缘结构显著。QAP检验显示空间中标准合作和区域经济一体化之间存在正相关性，格兰杰检验进一步验证两者彼此促进，互为因果。研究发现验证了标准合作和区域经济一体化的互促关系，拓展了标准治理研究，也启发政策层面以标准合作牵引区域经济协调发展的可行性。 相似文献
3.
高技术产业集聚是开辟区域发展新赛道、加速城市群一体化发展的关键，因此，厘清高技术产业集聚的空间溢出规律、明晰如何有效释放其创新外溢效能，对实现各地区联动发展和推动城市群一体化进程至关重要。基于2010—2019年我国长三角城市群面板数据，构建空间计量模型，实证考察空间溢出视角下高技术产业集聚对城市创新的影响规律及特征，结合产业结构优化升级探索高技术产业集聚的创新空间溢出效应的形成机制，从都市圈与城市发展阶段这两个空间与时间维度探讨空间溢出效应的时空异质性。研究发现：各城市高技术产业集聚的直接创新空间溢出效应呈现倒U形特征；长三角城市群各城市高技术产业集聚通过对邻近城市产业结构优化产生倒U形非线性空间溢出效应，进而影响邻近城市创新产出；空间异质性上，上海大都市圈中各城市之间呈现明显的倒U形创新空间溢出，杭州都市圈、南京都市圈、合肥都市圈中各城市之间的这种倒U形创新空间溢出效应依次减弱；时间异质性上，长三角城市群各城市从工业化发展阶段到城市化发展阶段，高技术产业集聚的正向创新空间溢出效应凸显。研究结论为充分发挥高技术产业集聚的创新空间溢出效应，进而突破城市发展瓶颈，形成优势突出、结构合理的... 相似文献
4.
高铁驱动下大尺度区域都市圈旅游空间结构优化——以京沪高铁为例 总被引：5，自引：0，他引：5
高铁"时空压缩"效应使都市圈旅游辐射范围进一步扩大。以都市圈为基本空间结构单元,分析高铁驱动下大尺度区域旅游空间结构优化具有重要意义。本文运用"核心-边缘"和"板块旅游"空间结构理论,结合京沪高铁线6个都市圈基本特征以及高铁旅游流空间网络结构和空间效应特征,通过节点优化,线状连接和面状拓展等空间优化路径,确定大尺度区域重点旅游发展点、旅游发展轴和旅游地系统,构建不同等级的旅游板块。通过一级核心旅游点和一级旅游地系统的核心扩散作用,将二级旅游板块和三级旅游板块由一、二、三级扩展轴融入一级旅游板块中,最终建构京沪高铁旅游带。高铁"时空压缩"效应使高铁旅游带的各都市圈空间联系增强,应加强都市圈区域旅游合作,进一步发挥高铁扩散效应和叠加效应,促使"旅游高地"不是对"旅游洼地"产生虹吸现象,而是更多发挥"旅游高地"的"溢出效应",带动"旅游洼地"发展,进而实现高铁区域旅游一体化发展的目标。 相似文献
5.
都市圈城际技术创新"孤岛效应"机理研究 总被引：1，自引：0，他引：1
解学梅 《科学学与科学技术管理》2010,31(10)
基于协同学和博弈论理论,分析了都市圈技术创新"孤岛效应"的内在机理.都市圈技术创新协同的"囚徒困境"博弈模型的结果表明:都市圈技术创新"孤岛效应"是圈内不同城市之间非理性竞争行为所导致的协同困境,根源于城际相互信任和协同机制的缺乏、协同激励的不足以及投机的高诱惑性和惩罚机制的缺失.此外,"孤岛效应"的路径依赖性结果表明,从长期来看,城际技术创新协同的"囚徒困境"在长期的协同过程中是可以克服的.由此,需要构建都市圈城际有效的诚信机制、协同机制、约束机制、惩戒机制以及激励机制,以建立都市圈内城市之间长期、稳定的协同关系. 相似文献
6.
为分析都市圈创新能力的空间互动发展,借鉴引力模型在经济吸引研究的应用成果,通过构建都市圈创新引力模型,结合都市圈创新能力的描述,对上海都市圈2001—2011年城市间创新能力的空间互动影响进行实证分析。结合实证结果将都市圈创新引力划分为超强、较强、强、弱、较弱和超弱等6个等级,并从促进创新能力综合发展、为外缘城市提供融入引力格局条件、以汲取群体有利因素促进互动、充分利用与核心城市的临近性等方面提出对策建议。 相似文献
7.
近年来,国家加大对长三角区域战略支持,如何更好促进区域内城市间的协同发展成为长三角区域发展战略深化的关键。立足于长三角城市群内六大核心城市的研究数据,通过分析部分关键指标之间的绝对量差距,利用首位度来测度核心城市在都市圈内的经济影响程度,进一步比较了六大核心城市差距。最后,在分析和总结区域间城市增长效应差异基础上,提出进一步推进区域间协同发展的相关对策与建议。 相似文献
8.
本文选取2011-2019年长三角地区41个城市面板数据,从创新要素区际流动的视角构建空间权重矩阵,运用空间杜宾模型、面板门槛模型,实证考察了长三角地区数字经济对区域创新产出的影响,结果表明：在创新人员及创新资本空间关联矩阵下,长三角地区创新产出及数字经济均存在显著的正向空间相关性;数字经济不仅有利于本地区创新产出的提高,还存在显著的正向空间溢出效应。相较于都市圈城市,非都市圈城市获得了更多的数字经济创新溢出红利,数字经济的发展有助于缩小城市间创新差距。随着数字经济发展水平的提高,其对区域创新产出的促进作用大小呈现出先增大后减小的非线性特征,且只有当数字经济发展到一定规模后,才会对区域创新产出产生显著的促进作用;进一步研究发现,数字经济与区域创新产出之间存在基于区域吸收能力的双重门槛效应,合理的区域吸收能力能有效强化数字经济对区域创新产出的促进作用。 相似文献
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10.
针对区域创新联系的边界效应问题,以长三角地区为研究对象,采用空间计量方法测度和分析其城市创新联系的边界效应,为加强长三角城市创新协同、优化创新空间结构提供决策支持。在分析城市间创新联系边界效应形成机制的基础上,将传统β收敛模型和基于Barro公式的边界效应模型拓展构建新的空间计量模型,以《长江三角洲区域一体化发展规划纲要》中的27个中心区城市为对象,对其2010—2019年的创新联系边界效应进行空间计量分析,揭示其内在形成机制及转化机制。结果表明：（1）长三角城市创新能力存在显著的正空间相关性,且创新能力趋于收敛,创新联系趋于紧密,创新一体化态势明显;（2）城市创新联系的省际边界效应表现为显著的中介效应,而创新联系的核心与边缘边界效应则表现为显著的屏蔽效应,且屏蔽效应呈现减弱态势;（3）经济发展水平、科技经费投入和交通基础设施水平对城市创新联系发挥着正向作用,且能够提高省际中介效应的显著性,削弱核心与边缘城市边界的屏蔽效应。根据研究结论,从利用好创新活动的各类空间效应、发挥好不同类型城市在创新联系中的作用、推进创新联系边界的屏蔽效应向中介效应转化等方面提出对策建议。 相似文献
11.
《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
12.
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.
《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
14.
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
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
16.
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
17.
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
18.
Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
19.
Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
20.
Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献