期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
西北地区城市化与空气质量变化关系研究 被引量:19
1
作者 任春艳 吴殿廷 +1 位作者 董锁成 王红强 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第2期204-208,共5页
以西北地区省会城市为研究对象,研究西北地区城市化与空气质量之间的关系.借助统计软件SPSS进行主成分分析、因子分析和聚类分析,得出西北不同城市的城镇化水平和空气污染类型,通过比较得出中度城镇化对环境的影响最大的结论;通过EVIEW... 以西北地区省会城市为研究对象,研究西北地区城市化与空气质量之间的关系.借助统计软件SPSS进行主成分分析、因子分析和聚类分析,得出西北不同城市的城镇化水平和空气污染类型,通过比较得出中度城镇化对环境的影响最大的结论;通过EVIEWS软件建立了适合西北地区城镇化与空气质量之间的Panel模型,发现短期内环境变化与城市发展之间呈环境库茨涅茨曲线特征. 展开更多
关键词 西北地区 中度城市化 Panel模型 环境库茨涅茨曲线
在线阅读 下载PDF
Schedule optimization to improve trunk-local bus transfer efficiency in small conurbations: A case study of New York's capital region
2
作者 张大鹏 王晓坤 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第7期1817-1822,共6页
Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on ... Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on the improvement of transfer efficiency. However, investigation on transit transfer efficiency is still lacking for medium sized cities or suburban areas that have sprawled from city centers. The special features associated with such an urban form lead to unique travel patterns and bus operations. This work develops a process to improve bus transfer efficiency for small conurbations considering their special characteristics. A case study of New York's Capital District is used to illustrate the proposed method. Results show that the transfer waiting time can be remarkably shortened. The proposed method can be widely adapted to other transit systems in small conurbations. 展开更多
关键词 transfer efficiency small conurbation rural transit
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部