基于GIS的矿区地表移动监测数据管理系统

用Visual Basic语言作为开发工具,用ESRI MapObjects为GIS平台软件,设计并开发了矿区地表移动监测数据管理系统,解决了长期以来监测数据管理繁杂、手段落后、分散不集中以及不顺应信息化、自动化和无纸化办公趋势的问题,实现了地表移动监测数据存储、管理、查询和图形化输出的一体化.     

The cumulative effect of nuisances from road transportation in residential sectors on the Island of Montreal – Identification of the most exposed groups and areas

Air pollution and road traffic noise are considered to be the two most important nuisances that could negatively affect the quality of life. A prolonged exposure to high concentrations of these pollutants could conduct to various health problems. Studies in environmental equity have often considered these nuisances individually whenever it comes from the same source. The main objective of this paper is to determine if the 15 years of age, those aged 65 and over, visible minorities and low income individuals located in a portion of the Island of Montreal are overrepresented in city blocks characterized by having among the highest levels of transportation-related air pollutants (i.e., ambient concentrations of NO₂ and road traffic noise in decibels (dB(A)). The results show that low-income individuals and, to a lesser extent, visible minorities, are significantly overrepresented in city blocks characterized by the higher levels of NO₂ and road traffic noise in dB(A). Multinomial logistic regression analysis confirms these results, and also shows that young people under 15 years are under-represented in the most polluted areas. However, contrary to the previous bivariate results, people aged 65 and over are negatively and significantly associated with the likelihood of their living in a city block located in an advantaged area after controlling for the independent effects of the other explanatory variables. Moreover, visible minorities are significantly overrepresented in advantaged areas. Considering the observed results, some solutions are identified to reduce road traffic noise and air pollution in the city blocks localized near major traffic arteries.     

Spatial and temporal distribution of expressway and its relationships to land cover and population: A case study of Beijing,China

The interaction between urban transport, land cover change and the distribution of population is a typical manifestation of the urbanization process. As high-grade road, expressway plays a significant role in promoting resource circulation and economic development. Based on the road distribution, land cover and population census data, this study specifically probed the relationship between the expressways and the land cover and population of Beijing. The results show that: (1) as the distance from an expressway increases, the amount of built-up land gradually decreased, and the transfer of land cover near the expressway was more intensive and frequent when compared with that of the whole city; (2) In 2010, a district that was less than 3 km from both sides of the expressway and which occupies one-quarter of the entire city had concentrations of 42% industrial land, 58% of settlement land, and 76% transportation land of the entire city; (3) As for Beijing, the population density was positively correlated to road density, and population density declined with a corresponding increase in buffer distance; (4) The ring area between the Fifth and the Sixth Ring Road featured the greatest density of expressways and the most dramatic changes in both land cover and population. According to our study, there’s a positive interactive feedback relationship between the expressways, land cover and population of Beijing. Also, due to the concentration of population, industry and transport system around the expressways, special attention should be paid to environmental pollution and the inhabitants’ health in this area.     

A GIS‐based traffic analysis zone design: implementation and evaluation

The purpose of this paper is to implement an efficient method for GIS‐based traffic analysis zone (TAZ) design in order to evaluate and validate such a method. The method was developed by the authors.

Moran's I spatial autocorrelation coefficient and sample variance are used for evaluating the generated TAZs using the Champaign‐Urbana, IL region as a case study. Sensitivity analysis is also conducted to explore the fluctuations in TAZ generation outcomes. The evaluation, the validation as well as the TAZ design have been implemented with ARC/INFO GIS software on a UNIX workstation platform.     

电气化铁道专用六氟化硫（SF6）气体绝缘全金属封闭组合电器（GIS）研发及应用

通过对现有27.5 kV常规敞开式设备的缺点分析,说明ZF□—31.5型GIS研发应用的必要性。经可行性研究,确定其研发、生产已具备条件,并结合襄渝线六里坪牵引变电所大修工程完成了首套该产品的运行实践,详细介绍了该产品结构特点、主要元件及优越性。     

基于GIS的高速公路交通事故信息管理与分析

介绍了GIS高速公路联网监控系统中交通事故信息的管理与分析。     

基于GIS的交通污染扩散模拟

利用GIS技术建立机动车污染仿真模拟系统，能够直观反映机动车污染的时空分布规律，为机动车污染控制研究提供有力的工具。以ArcGIS Engine为开发工具，通过属性数据和空间数据的连接，实现了武汉市机动车污染的数据查询和空间显示等功能，通过GIS和高斯扩散模型的集成，分析了武汉市交通污染分布，为机动车污染的控制提供了技术支持。该系统能对武汉市机动车污染物的排放进行实例分析。     

浅谈GIS技术在公路工程中的应用

GIS技术在许多领域获得广泛应用，尤其在公路工程的管理中，它比传统的管理方法具有直观、高效等优势。目前，在公路规划、设计、管理等各个环节都引入了GIS技术，大大提高了管理的效率。     

贵州省滑坡灾害危险性分区图编制研究

基于GIS对贵州省区域内的滑坡危险性进行评估.首先,研究将历史地质灾害分布、地形、地层岩性、断裂构造、河流水系和年均降雨量作为相互独立的滑坡诱发因子,并对各因子按照一定标准再次分级,形成滑坡危险性评价指标体系,绘制各因子的分级图层;然后,考虑因子贡献率,以黄金分割法确定6个因子对发生滑坡灾害的权重;最后,在GIS环境下,应用权重线性组合模型建立滑坡危险性分区图.根据该图,研究区域被划分成4个危险等级:灾害密集发育区、灾害中等密集发育区、灾害偶发区、灾害基本不发育区.通过将滑坡危险性分区图与历史滑坡分布图叠加对比,验证分区图的准确性和可靠性.     

Integrating GIS concepts into transportation network data structures

Transportation network data structures must be designed to meet the requirements of the analyses being conducted and must be compatible with the selected graphical user interface. Increasing interest in geographic information systems (GIS) and intelligent transportation systems (ITS) have further burdened the network data structure. It is possible to implement object oriented programming (OOP) technology to satisfy these needs, without making the data structure excessively complicated.

This paper shows how a well‐developed network data structure can incorporate major capabilities normally associated with stand‐alone GIS's. The design of a network data structure derives from both theoretical and practical considerations. A design of a network data structure, composed entirely of objects, is presented. Examples of its implementation, limitations, advantages, and possible extensions are drawn from experience with the General Network Editor (GNE).