一个基于插件的地理信息组件功能扩展模型

从地理信息系统应用的分类出发,分析其应用的特点和难点,在此基础上,研究提出一个基于插件的地理信息组件功能扩展模型.模型通过插件技术来扩展地理信息系统的应用,并使其他系统得以使用地理信息系统的资源和功能.定义了这样的系统必需的组成部分和各个组成部分之间的接口、以及它们的功能和满足的要求,给出了一个实际应用的结构.     

地理信息系统在城市轨道交通中的应用前景

论述城市轨道交通不断扩展,形成城市轨道交通网络,对勘测设计、综合协调指挥和快速应急处理能力方面提出更高的要求。利用地理信息系统（GIS）的数据输入、存贮、检索、显示和综合分析应用等功能,为城市轨道交通信息提供快速、准确的现代化管理手段。此外,地理信息系统的三维可视化功能可以实现城市轨道交通基础数据管理的可视化,使轨道交通建设管理信息从简单的文字、表格形式向图形、报表、三维模拟,甚至是信息的时空四维动态表达发展。     

Daily emotional demands on traffic crashes among taxi drivers: Fatigue and safety motivation as mediators

Many studies have validated that emotional demands are one of the main stressors that lead to fatigue, decreasing the safety behaviour in services work-related. However, studies to date have relied on long-term emotional demands rather than on the short-term fluctuation in emotional demands. The main aims of this research was to investigate the influence of individuals, as well as the daily levels of emotional demands on self-reported crashes, mainly through daily acute fatigue and safety motivation. The study was conducted among taxi drivers (N = 96) over a period of six days for both, morning and afternoon sessions in Kuala Lumpur, Malaysia. As expected, it was found that increased levels in an individual's daily emotional demands were related to acute and chronic fatigue, where only acute fatigue had an influence on safety motivation. In addition, safety motivation decreased the rate of self-reported crashes. These results suggest that the increment level of emotional demands has an indirect relationship to traffic crash rates, mainly through fatigue and safety motivation.     

Measuring the welfare effects of infrastructure: A simple spatial equilibrium evaluation of Dutch railway proposals

We specify a spatial computable general equilibrium model for the Netherlands based on the so-called New Economic Geography. The model distinguishes 14 sectors, two modes of transportation and over 500 municipalities. Key parameters are estimated by fitting predicted interregional trade flows to bi-regional input-output data. The model is then calibrated to a baseline scenario for 2020. From there, the transport grid is modified in line with six proposals for changes in rail infrastructure. The effects of these changes on employment and welfare are computed. We find that the most ambitious project leads to a redistribution of around 8000 jobs from regions further out to regions along the line and especially at the end of it. The net national welfare effect is equivalent to a 250 million euro (0.016%) increase in GDP.