共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
3.
4.
5.
6.
根据休闲资源的内涵,构建以休闲旅游、体育、文化、娱乐等资源为核心的分类及其测度指标体系,选取31个省会城市为研究对象,采用Arc GIS分位制图、核密度分析和资源丰度分析对我国休闲资源分布特征进行研究,并采用相关性及回归方法进一步分析其影响因素。结果表明:我国休闲资源分布整体存在非均衡性,分布呈聚集状态,形成了以北京、天津为核心的京津冀地区,以上海为核心的长三角地区和以重庆为核心的中部地区等三大集聚中心区域。从资源丰度看,我国中等休闲资源丰度水平的城市较多,资源分布结构较为稳定;地区生产总值、人口数、旅游总人数、客运总量、年末实有城市道路面积、人均可支配收入等指标对休闲资源分布呈现显著性影响。 相似文献
7.
8.
9.
10.
11.
12.
贸易对环境影响的初步研究 总被引:1,自引:0,他引:1
根据环境经济系统的双层结构建立了贸易对环境影响的概念模型 ,即贸易通过环境类、经济类物品和服务的输入输出 ,对环境子系统直接或通过经济子系统间接产生影响 ;对影响环境的贸易 (外部因素 )与环境成本内部化(内部因素 )问题 ,分别进行了分析 ;就贸易对环境影响的研究方法问题 ,运用局域均衡模型 ,为局域贸易环境问题的量化分析提供较为便捷、可靠的模式进行了初步探讨。 相似文献
13.
This article offers a different perspective to the well known problems of water scarcity in the Middle East. It is argued that there are strong linkages between prevailing national ideologies and intraregional water disputes. Domestic political necessities and commitments often limit foreign policy choices open to countries with regard to the settlement of water disputes. This tends to exacerbate existing conflict. Reasons given include ideologically intertwined issues related to national security, including food security and national independence in conjunction with a deep socio-cultural commitment to a prospering agricultural sector. Any proposed solution to Middle East water disputes needs to take ideological-political factors into account in addition to the physical, social, cultural and economic aspects. 相似文献
14.
基于BP神经网络模型的城市土地集约利用中观评价研究 总被引:1,自引:0,他引:1
中观层次的城市土地集约利用评价是以城市功能区为研究对象,通过建立各功能区的评价单元,对城市土地的投入产出效益进行定量分析研究的过程。从土地利用、土地投入、土地产出三个方面构建评价指标体系,借助BP神经网络模型从中观层次对淮安市清河区城市土地进行集约利用评价。结果显示,清河区土地集约利用水平总体较高,仍需加强土地的投入产出效益。研究表明,BP神经网络模型是一种较客观的评价方法,中观评价则能更详细地了解城市内部各个区域的土地利用情况,为政府决策提供更好的依据。 相似文献
15.
为了实现农业政策的生态化,即农业政策以环境保护为导向,减少农业政策对环境的影响,需要对农业政策进行环境影响评价。通过深入分析农业政策的环境影响评价对法治建设和生态文明建设的意义,认为在当前我国环境影响评价制度缺少相关政策层面环评的情况下,应当先对农业政策进行环评,通过确立政策环评范围、主体,对其进行阶段性设置,从而完善环评的法律体系,实现农业政策与环境保护的统一。 相似文献
16.
17.
本文分析了我国出口增长对环境(CO_2)的影响,结果表明:出口的增长并没有带来人均CO_2排放量的大量增加,相反,在一定程度上却减少了人均CO_2的排放。 相似文献
18.
Josef Maroušek 《Journal of Agricultural and Environmental Ethics》2013,26(3):679-689
Phytomass cultivation for energy use is increasingly popular in Europe for high profits guaranteed by subsidy. Although public interest in ecology is on an increasing level, direct combustion is still preferred even though scholars have been warning about formations of hazardous compounds for a long-time. However, the reduction of subsidies would negatively affect an already bad situation in Czech agriculture, since most farmers became fully dependent on subsidies due to quotas, restrictions, and other unequal business conditions in European Union. It was proved in a commercial scale that an alternative phytomass energy utilizing technology consisting of steam explosion and subsequent anaerobic fermentation may be run solely on the waste heat without any further addition of chemicals. Behavior analysis of present and future agriculture decision-makers showed that none of the farmers who visited the facility cared about ecological consequences. On the other hand, ost students from the Faculty of Agriculture and the Faculty of the Economy answered the questionnaire with higher environmental responsibility. We assume this is caused by high average age of farmers in Czech Republic who are more aware of the ongoing economical difficulties and perceive differently the risk of higher acquisition costs. 相似文献
19.