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排序方式: 共有954条查询结果,搜索用时 15 毫秒
51.
大都市郊区小城镇的经济地域类型及其空间分异探析——以北京市为例 总被引:4,自引:0,他引:4
本文致力于探析京郊小城镇的经济地域类型及其发展的动力机制,综合运用了H.J.纳尔逊的城镇职能分类方法和区位商法,从三次产业的产值结构和从业结构出发,将京郊183个小城镇划分为四大类型。基于GIS的空间分析功能,进一步探讨了京郊四大类小城镇的空间分布规律和演变趋势,结果发现这四大类小城镇的核心—外围空间格局十分明显,有着各自不同的功能定位和演进机理。基于此,为不同类型的小城镇制定了不同的发展策略,以便为今后不同类型的小城镇开展分类规划指导提供科学依据。 相似文献
52.
复合型世界遗产及其资源基础和文化内涵--以"峨眉山-乐山大佛"与"青城山-都江堰"为例 总被引:3,自引:1,他引:3
本文首次提出“复合型世界遗产”这一概念。在统计目前复合型世界遗产情况的基础上,探讨复合型世界遗产“申报热”这一现象及其意义,并以“峨眉山一乐山大佛”与“青城山一都江堰”为例,对复合型世界遗产的资源基础和文化内涵的“复合”情况进行分析。 相似文献
53.
This paper provides a historical overview of financial crises and their origins. The objective is to discuss a few of the modern statistical methods that can be used to evaluate predictors of these rare events. The problem involves the prediction of binary events, and therefore fits modern statistical learning, signal processing theory, and classification methods. The discussion also emphasizes the need for statistics and computational techniques to be supplemented with economics. The success of a forecast in this environment hinges on the economic consequences of the actions taken as a result of the forecast, rather than on typical statistical metrics of prediction accuracy. 相似文献
54.
Benis Egoh Mathieu Rouget Andrew T. Knight Albert S. van Jaarsveld 《Ecological Economics》2007,63(4):714-721
A call has been made for conservation planners to include ecosystem services into their assessments of conservation priority areas. The need to develop an integrated approach to meeting different conservation objectives and a shift in focus towards human wellbeing are some of the motivations behind this call. There is currently no widely accepted approach to planning for ecosystem services. This study contributes towards the development of this approach through a review of conservation assessments and the extent to which they include ecosystem services. Of the 476 conservation assessments identified by a set of search terms on the Web of Science, 100 were randomly selected for this review. Of these only seven had included ecosystem services, while another 13 had referred to ecosystem services as a rationale for conservation without including them in the assessment. The majority of assessments were based on biodiversity pattern data while 19 used data on ecological processes. A total of 11 of these 19 assessments used processes, which could be linked to services. Ecosystem services have witnessed an increase in attention received in conservation assessments since the year 2000, however trends were not apparent beyond this date. In order to assess which types of ecosystem services and how they have been accounted for in conservation assessments, we extended our review to include an additional nine conservation assessments which included ecosystem services. The majority included cultural ecosystem services, followed by regulatory, provisioning and supporting services respectively. We conclude with an analysis of the constraints and opportunities for the integration of ecosystem services into conservation assessments and highlight the urgent need for an appropriate framework for planning for ecosystem services. 相似文献
55.
天津滨海新区被纳入国家重点战略发展区域,工业在其发展中具有举足轻重的地位。规模以上工业企业是新区乃至天津市经济和科技发展的重要力量。对新区规模以上工业企业科技投入进行了认真分析,提出了有针对性的政策建议。 相似文献
56.
宁夏引黄灌区现代农业发展问题研究 总被引:2,自引:1,他引:2
宁夏引黄灌区现代农业的发展,是我国西北地区农业现代化的重要组成部分。文章通过对宁夏引黄灌区农业发展现状的研究,总结出灌区内现代农业发展的示范性模式,并针对灌区农业现代化过程中出现的部分问题进行对策探讨,以期为西北地区现代农业的发展提供理论参考。 相似文献
57.
长三角地区产业结构高级化及影响因素 总被引:6,自引:0,他引:6
本文根据三次产业结构比重,构造了长三角江浙沪三地的产业结构层次系数,对三地产业结构高级化变动进行了分析,发现产业结构高级化存在区域差异和趋势趋同特征,继而使用1990—2008年面板数据对影响产业结构高级化的影响因素进行了实证检验。结果发现:科技创新和政府规模对于产业结构高级化有正向作用,进出口贸易对于产业结构升级产生负向作用,FDI和社会投资作用则不太明显。其政策含义在于,在长三角产业结构升级化进程中,更应该注重科技创新和技术进步来推动产业结构高级化发展,从而实现产业结构调整和经济发展转型。 相似文献
58.
在概括广西经济发展和税收发展的基础上,从宏观税负、税收优惠政策、税收协调政策以及区别对待企业等方面剖析当前税收政策在促进广西经济增长中存在的不足,进而从宏观税负、重点支持对象、关税、税收优惠政策、税收协调措施和企业待遇等角度提出解决问题的对策。 相似文献
59.
Yufei Shan 《中国经济评论(英文版)》2006,5(2):65-68
As the rumor that RMB will appreciate in the near future, most Asian currencies had appreciated according to this matter since the appreciation of Chinese RMB will strengthen the exports of those Asian counties, thus appreciate the currencies of those countries. An OCA matter here comes again to the Asian countries. As we all know, Euro has been formally used among European areas since 1999, and this is the fir.st time that the optimum currency system was adopted in the international history. Asia, as another area that has most development potentiality in the world, should it adopt the monetary integration process as well? In this paper the necessary conditions to form an OCA are analyzed; European experience are conjured with the own feature of East Asia areas; possibilities of forming the OCA in East Asia are concluded as well as the resistances; besides the potential process of forming an OCA is suggested. 相似文献
60.
西部发展缓慢的根本原因在于产权制度的落后。西部大开发的本质是以产权制度建设为核心的制度大变革。在这场变革中 ,应建立以现代农地产权制度为基础 ,现代工业产权制度为中心 ,现代知识产权制度为先导 ,现代教育产权制度为龙头的产权制度体系 ,从而推动西部实现跳跃式发展。 相似文献