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1.
随着近年来我国城镇化发展步伐的不断加快,人们对城市物质文明与精神文明建设的重视程度越来越高,乡村人们生活方式也日益接近城市,甚至趋于同一水准。因此,城镇化应该具备能促进乡村发展的城镇化,与此同时,美丽乡村建设应该摒弃乡村规划的传统以经济转型带动乡村建设的传统模式,逐步转变为通过改造提升村庄景观环境而提升文化的全新模式,从根本上达到提升景观模式带动乡村建设的目的,事其能很好地为促进我国城乡建设发展提供服务。 相似文献
2.
资源基础型城市群城镇体系规模结构的时空演变研究 总被引：1，自引：0，他引：1
资源基础型城市群是从资源型城市和城市群关系角度界定的一类城市群,它是我国城市群体系中的重要组成部分,本文选择我国典型的资源基础型城市群—辽宁中部城市群,对其城镇体系中城市规模的时空演变进行了深入分析。以城镇规模分布研究中的分形理论为基础,讨论了城镇规模和经济规模的演变过程和特征,将Gibrat法则引入城镇体系规模变化的研究。研究结果表明,辽宁中部城市群城镇体系的规模服从对数正态分布,城市规模和经济规模均具有典型的分形特征;根据分维值时间序列,可以判断在不同时期,不同规模的城市异速生长的特征;城市规模结构分维与经济规模结构分维的时空演变具有历史吻合性,经济规模变化引起城市规模变化;城市群中资源型城市在城市的地位一直非常稳定,中心城市的地位间歇上升,对城市群的影响力趋强。 相似文献
3.
区域一体化促进了城市群经济高质量发展吗———基于长三角城市经济协调会的准自然实验 总被引：1，自引：0，他引：1
区域一体化促进了城市群经济高质量发展吗———基于长三角城市经济协调会的准自然实验 《科学学研究》2021,39(1):63-72
在我国经济已迈入高质量发展阶段,城市群作为区域经济发展的主要承载形式,如何提高区域一体化水平,促进城市群经济高质量发展,已成为当前区域经济研究的热点。本文将长三角城市经济协调会这一区域合作机制视为准自然实验,通过双重差分法建立实证模型考察区域一体化对长三角城市群经济高质量发展的影响,并对其异质性和作用机制进行深入探讨。研究表明：区域一体化提高了长三角城市群经济发展的整体质量,稳健性检验同样支持这一结论。异质性检验表明,区域一体化促进了长三角原位城市和新进城市的经济发展质量,且这种促进效应在原位城市要大于新进城市。机制检验表明,区域一体化可以通过市场整合机制、产业结构升级机制促进整体城市、原位城市和新进城市经济高质量发展,但经济联系机制的作用则存在区域差异性。 相似文献
4.
《内蒙古科技与经济》2019,(23)
通过对引力模型的修正,结合区域增长溢出效应Capello模型对宁夏沿黄城市群空间经济联系及其溢出效应进行分析。结果表明:宁夏沿黄城市群内经济发展不平衡,目前形成了"一核两翼两轴"的空间格局;银川作为沿黄城市群的中心城市,经济增长带来的溢出效应最强,充分显示了对区域经济的辐射带动作用;除银川外的其他3市经济增长净溢出效应虽较弱,但总体呈增长趋势。为了促进宁夏沿黄城市群的协调发展,应统筹全局、实现城市群内各城市的合理分工,提升银川作为区域中心城市的竞争力、加强城市综合实力的建设,完善交通基础设施、构建区域综合交通枢纽等。 相似文献
5.
资源型城市为国家经济建设提供了大量自然资源,面临着资源耗尽和环境污染等问题,必须进行低碳转型升级以实现可持续发展。为此,首先阐释资源型城市低碳转型的影响制约因素,构建资源型城市低碳转型评价指标体系,并对转型等级进行划分;在此基础上,确定考虑非期望产出的SBM评价模型,以国内17个典型资源型城市为例,通过生产率指数(ML)及全要素生产率(TFP)分解值在不同年度的差异化变动进行实证评价,以检验所构建的评价系统的科学性和可行性。实证评价结果表明,低碳技术进步和环境管制政策的双重作用能够促进资源型城市的低碳转型,两者效应的叠加使资金更多地向技术创新领域倾斜,并集中于低碳产业,这有效促进资源型城市低碳经济的增长。 相似文献
6.
资源枯竭城市转型成效测度研究 总被引：5，自引：0，他引：5
资源枯竭城市转型是当前中国国家转型的一个重要组成部分。在经历了改革开放、东北老工业基地振兴以及近5年国家针对资源枯竭城市大规模援助的发展形势下,资源枯竭城市转型发展的成效如何？本文试图从资源枯竭城市转型的静态和动态两个视角,构建资源枯竭城市转型成效测度体系,测算2006-2010年各资源枯竭城市的转型成效,并分析各城市转型成效差异的原因。研究发现:通过从产业、民生、生态环境3个维度综合评估城市转型过程和转型后达到的状态等指标,可以将城市转型发展的成绩与其由于周边区域发展所取得的共同成绩分离出来,较为有效的测度资源枯竭城市的转型成效;中部城市转型成效相对较好,而东北地区城市转型相对较差;石油类城市转型成效较好,而森工类城市转型成效较差;各城市转型成效的差异与其外部经济环境、内部历史矛盾的积累深度以及发展基础有较大关系。 相似文献
7.
西方国家资源型城市产业转型模式及对我国的启示 总被引：1，自引：0，他引：1
促进资源型城市产业转型、实现城市的可持续发展是我国经济发展和城市化进程中的重要问题。西方国家资源型城市经济转型的实践有许多值得我们借鉴的成功模式。通过对新产业替代模式等三种转型模式及其各自适用性的分析,对我国的资源性城市转型实践具有借鉴意义。 相似文献
8.
人力资源是资源型城市经济转型中替代自然资源促进经济增长的重要要素.资源型城市人力资源存在着数量充裕与质量较低的矛盾,需要进一步加大人力资本投资力度.针对员工个人、资源型企业和资源型政府在人力投资收益中的不同价值取向,设计了投资导向型、利益导向型、外部导向型和双高平衡型的投资分享机制,并在资源型城市经济转型的技能培训政策中进行了应用. 相似文献
9.
为加强环境保护,选择一条既能保护环境,又能推进城镇化又好又快健康发展的城镇化发展道路,对加快建设资源节约型、环境友好型及和谐宜居的生态型城市群具有十分重要的意义.本文以关中城市群为研究对象,从环境的角度分析了关中城市群发展及对环境的影响,并提出加大环境综合治理力度、强化环境管理、构建生态城市等策略,从而实现城市群与环境保护的协调发展,为陕西省环保规划的制定提供有价值的依据,促进城镇化与环境保护协调发展. 相似文献
10.
西北干旱区资源型城市发展与转型研究 总被引：5，自引：0，他引：5
资源型城市是一种特殊类型的城市群体。本文以资源产业的生命周期理论为基础,以西北干旱区为区域背景,以资源型城市为典型案例,通过对西北干旱区资源型城市发展现状的分析,指出西北干旱区资源型城市的发展除了受到经济结构畸形、矿产资源的不可再生性等资源型城市面临的普遍问题之外,还面临水资源短缺和生态环境脆弱两大特殊瓶颈。最后基于资源型城市的生命周期理论和干旱区的特殊性,提出资源型城市的发展与转型要具体分析、分类指导。对处于幼年期的资源型城市,要搞好资源产地和城市发展的长期规划,资源产地不一定要设市;对处于中年期的资源型城市,要通过产业结构调整和资源优势转换,提前做好转型准备;对处于老年期的资源型城市,要利用积累下来的资金、技术、人才等带动其他产业,逐步把重点转移到非资源型行业领域中,在国家和地方政府的支持下,进一步做好城市的未来发展与转型。 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