期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
基于移动闭塞的状态发车技术研究
1
作者 郭军强 《铁路通信信号工程技术》 2024年第6期1-7,共7页
在移动闭塞基础上,根据列车运行计划、列车状态、列车位置、列车制动性能、站场区段状态以及道岔位置等条件,以区段及道岔建立二叉树模型,搜索列车走行路径,判断列车位置出清关键道岔区段节点,计算后续发车进路办理时机,办理后续发车进... 在移动闭塞基础上,根据列车运行计划、列车状态、列车位置、列车制动性能、站场区段状态以及道岔位置等条件,以区段及道岔建立二叉树模型,搜索列车走行路径,判断列车位置出清关键道岔区段节点,计算后续发车进路办理时机,办理后续发车进路,实现进路由计划办理到状态办理转变,发车由计划发车到状态发车转变。缩短发车时间间隔,进而提升车站发车能力。 展开更多
关键词 移动闭塞 发车时机 关键道岔 计划发车 状态发车
下载PDF
Spatial and Temporal Pattern of Urban Smart Development in China and Its Driving Mechanism 被引量:3
2
作者 CHEN Xiaohong WEI Luyao ZHANG Haifeng 《Chinese Geographical Science》 SCIE CSCD 2018年第4期584-599,共16页
Smart urban development is an inevitable choice, and is essential to overall strength improvement. It is important to explore an urban smart development path which unites smart growth with driving shrinkage perfectly ... Smart urban development is an inevitable choice, and is essential to overall strength improvement. It is important to explore an urban smart development path which unites smart growth with driving shrinkage perfectly in forming scientific and sustainable development concept and responding to new normal strategic opportunities. Based on statistic data of 294 prefecture-level cities and above in China from 2000 to 2015, we analyzed spatial and temporal evolution of urban smart development in China by constructing a dynamic fitting model of urban land expansion, population growth, and economic development as well as the coefficient of variation of urban smart development(CVSD). Further efforts were then made to consider differential distribution regularity of urban smart development so as to understand the driving mechanisms of heterogeneous classification of urban smart development in China from different scales and scale variation. Our results indicate that: 1) the disordered growth tendency of urban cities in China is overall well controlled in the middle, and late research and it mainly presented a doublet coexistence of shrinkage disordered cities and smart developing cities. It is particularly obvious that Northeast China and East China have regarded shrinkage disordered cities and smart developing cities as main development tendency separately. 2) Areas with basic stability and relative variation were relatively dispersed across the time period, but the proportion was far beyond areas with significant variation. It demonstrates a relative equilibrium spatial and temporal differential evolution pattern of prefecture-level cities and above in China, except for Tongling, Lanzhou and Chaoyang. 3) prefecture-level cities and above in China are mostly characterized by shrinkage disordered and smart development classification under the background of different scale and scale variation from 2000–2015; however, the spatial resonance relation is not obvious. 4) There are many interaction factors forming an important driving mechanism in developing the spatial and temporal pattern of urban smart development in China, including natural geographical factors, industrial structure adjustment, human capital radiation, regional traffic accessibility, and government decision-making intervention. 展开更多
关键词 urban smart development spatial and temporal differential pattern driving mechanism interaction factors China
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部