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71.
《经济地理》2012,32(6)
以我国目前最大石油城市——大庆市为研究对象,选取1984、1995、2007年3个城市建设关键时间节点,以Landsat MSS、TM卫星影像为主要数据源,利用GIS技术提取城市建设用地规模、形态、增长幅度、区位坐标等信息,计算城市空间扩张速度、强度、城市空间形态紧凑度、分维指数、城市增长理性程度等空间特征量,分析大庆市1984年以来城市空间扩张现象和特征,并结合经济社会统计相关数据及区域分析方法,探究其因果关系。研究认为,大庆市城市空间扩张与形态演化具有石油城市发展的典型性和一般规律,表现出建设用地总量大、扩张速度快、强度高、增量分布不均衡、空间形态不规则、紧凑度低、城市中心地迁移方向与用地扩张基本一致等特征。这些现象和特征的主要形成原因包括石油开发战略指向、自然环境约束、交通设施引导、城市规划调控、中心地功能变迁等五个方面。 相似文献
72.
《Telecommunications Policy》2017,41(10):931-947
Over the past two decades, China’s telecommunications industry has witnessed drastic market reform, steadfast institutionalization, and volatile technological changes, which have driven exponential industry expansion. This paper offers an updated longitudinal and comprehensive review on this reform process on the eve of 5G (the fifth generation mobile communications networks). First, the paper segments the two-decade reform crusade into discernible phases, each of which is embedded with different policy drives. These reform phases are then pattern-matched against the subtleties of the overall institutional, technological, and market backdrop. A series of policy issues are identified through a systematic examination of industry phenomena over the reform course. Finally, the status of research is assessed regarding China’s telecom industry and reform, based on which, knowledge gaps are identified and future research agenda suggested. Conclusions are made regarding future reform and research imperatives. The paper advances the understanding of China’s telecom reform, development, and the underlying policy issues. It updates and expands previous works on similar topics. Overall, this study provides important theoretical, managerial, and policy implications. 相似文献
73.
Torsten Heinrich 《Journal of economic issues》2017,51(2):383-391
Some models in evolutionary economics rely on direct analogies to genetic evolution, assuming a population of firms with routines, technologies, and strategies on which forces of diversity generation and selection act. This narrow conception can build upon previous findings from evolutionary biology. Broader concepts of evolution allow many or just one adaptive entity, instead of necessarily requiring a population. Thus, an institution or a society can also be understood as an evolutionary entity. Both the narrow and broad approaches have been extensively used in the literature, albeit in different literature traditions. I provide an overview of the conception and development of both approaches to evolutionary modeling, and argue that a generalization is needed to realize the full potential of evolutionary modeling. 相似文献
74.
"稷"是粟在商周时期的别称。"禾"本为粟的原始象形字,后引申作谷物总名,是战国秦汉时期粟的主要称呼,宋代以后南方地区也有专指稻的。"谷"最初被用作谷物的总名,魏晋以后则成为粟的普遍称呼。"粟"本义是指谷子的籽实,但战国秦汉时可泛指谷类作物籽实,魏晋以后则演化成谷子的专名,既可指植株也可指籽实,唐代以后还可以专指稻。不过这些粟的名称只是当时多数地区的主流称呼,实际上各个时期都存在不同名称交叉的现象。另外,"粢"最初是指祭祀时所用之粟,"粱"是粟的一个优良品种,"秫"是粟的一个品种即粘粟,而"穈"和"芑",则是指红粱粟和白粱粟。 相似文献
75.
Wim Vanhaverbeke Patrick Van Cayseele 《Economics of Innovation and New Technology》2013,22(3):185-202
Since the invention of the European Patent System, national patent systems have continued to co-exist, although they did lose appeal. How have the different national systems been affected in view of their characteristics? In order to answer this question a constant-market-share (CMS) analysis is carried out. While on a theoretical level, the different elements adding to the appeal of each patent system are discussed, the CMS-analysis reveals the importance of country size in that the national systems of smaller countries lose. 相似文献
76.
首先运用知识图谱这种可视化工具,构建模型共被引网络,对经济增长模型的演化脉络进行分析;接着从博弈论的角度对经济增长模型的演化脉络进行模式分析,揭示出经济增长模型的包容式演化模式.最后根据共生理论,从经济增长中各行为主体收入分配的角度建立日本经济增长模型,对日本1955-2005年的经济增长因素进行分析,从而说明共生理论模型是经济增长模型的包容式演化的新进展,同时对中国经济发展方式转型提供了经验借鉴. 相似文献
77.
78.
Chaozhi Zhang 《Journal of Sustainable Tourism》2013,21(2):214-233
This paper addresses the dynamics of the evolution of a nature-based destination in China. Based on longitudinal studies in Zhangjiajie (Hunan Province), it focuses on the roles of institutions in tourism development in China, demonstrating the centrality of institutions and governments in fostering destination development through policy orientations, attracting investments and regulations in their capacity as producers, protectors and promoters of desired processes of change. It describes a five-stage development process from Exploration, through Starting and via Fluctuation and Acceleration to the current stage of Transition leading towards a Destination seeking Better Service Quality. The study, by incorporating institutions as a driving force, develops an RICI model (Resource, Institution, Capital and Innovation) accounting for destination development in China. The key role of policies implemented by local governments and the roles of institutions are critical in the process of its development, especially in the earlier stages, contrasting with many western countries, where the private sector and central government tend to dominate. The paper notes the role of inter-institution rivalries, and the impact of those rivalries on sustainable development. It is suggested that the proposed model could be empirically verified and tested in other cultural or regional destination development contexts. 相似文献
79.
Andrés Alvarez 《European Journal of the History of Economic Thought》2013,20(1):53-78
This paper studies Carl Menger's theory of the emergence of a commodity money. We propose an interpretation of Menger's learning by imitation process based on the search theoretical formal framework. We show that there exists a tension between the importance of intrinsic properties of commodities and the pure conventional self-fulfilling expectations of agents. This confirms the role of imitation in the emergence of monetary equilibria in search theory. We conclude that Menger's approach may support the idea that the fundamental property of a commodity-money (namely its great liquidity) is the result of its emergence process and not necessarily of its original intrinsic properties. 相似文献
80.
从仿生学的角度研究企业并购,利用企业DNA理论提供一种分析路径,同时以联想并购整合IBMPC业务部的案例为研究背景,阐述了企业间并购导致企业基因重组,并购这种发展方式对于企业就像生物体的有性繁殖方式,能够使企业基因双倍化,从而提高了企业进化速度,形成更适应市场环境的企业。 相似文献