地铁穿越地下特殊管线的监测

随着城市化发展的加快,城市地铁建设正迎来高潮。新建地铁与城市既有地下市政设施之间的矛盾不可避免,尤其是对原有市政管网的互相扰动。对特殊管线的长时间、多手段的监测,为后续新建地铁的勘察、设计、施工提供了可靠的技术支持。     

基于GOCAD平台的复杂地质体系的动力学建模研究

建立地质体系的三维模型并进行动力学数值模拟是进行地质过程研究的最有效途径,但数值模拟软件一般都存在直接建模难的问题.本文在分析建模软件GOCAD与动力学数值模拟软件FLAC3D的数据文件特点的基础上,提出了利用GOCAD软件建立六面体模型,通过数据接口程序,完成FLAC3D中复杂地质模型的构建.用这种方法建立了安徽铜陵...     

自动网格法程序的数值模拟测试

为了测试改进后的程序,原始网格图和变形网格图皆由计算机生成。在生成变形网格图时,考虑了刚体移动、刚体转动、一般变形这三种变形,另外还生成一幅中间缺少网格点的大变形图像。结果表明:在不同的变形情况下,尤其在中间缺少网格点的大变形下,虽然网格点分布不规则,但是程序仍然能够自动分割、编码,而且准确无误;呈二值化分布的网格点误差为0.0058像素以下,呈高斯分布的误差为0.00076像素以下。     

用MFC快速开发屏幕保护程序

分析了操作系统对屏幕保护程序的调用机制，提出完全使用MFC快速开发屏幕保护程序的方法，并比较该方法与传统实现方法的优缺点之后，利用MFC实现了一个在指定目录查找并装入位图文件，然后定时切换位图显示的屏幕保护示例程序。     

Runoff and peak flow responses to timber harvest and forest age in southern Chile

Runoff and peak flows in three experimental catchments with different forest conditions were analysed in a rainy temperate climate in southern Chile. The hydrological effects of clearcutting a Pinus radiata plantation covering 79·4% of the La Reina catchment were studied by analysing runoff and peak flows in the pre‐ and post‐harvesting periods. Mean annual runoff increased 110% after timber harvesting. Clearcutting generated a 32% mean increase in peak flows. Peak flow and runoff were examined in two adjacent catchments with different forest conditions. The older plantation in Los Ulmos 1 increasingly consumed more water than the younger plantation established at Los Ulmos 2, whereas differences in peak flows between these two catchments were not significant. Runoff and peak flows comparisons not only reflected changes in forest cover, but also the effect of rainfall characteristics during the study periods and the basins' morphologies. Comparisons between pre‐ and post‐harvesting peak discharges must be undertaken with caution, because a previous analysis at La Reina using a partial set of data overestimated changes in peak flows after timber harvesting. Copyright © 2005 John Wiley & Sons, Ltd.     

面向办公人员的地图服务模式研究与实践

本文基于目前迅速发展的IT技术与成熟的地理信息技术,结合政府办公人员的工作特点,提出了基于G IS功能的地图服务模式,并用C开发了无编程网络地图发布工具,实现了专题地图的网络发布,证明了该技术方法的可行性;通过与基于系统的地图服务模式比较,证实了基于GIS功能的地图服务模式更适合办公人员去使用地图。     

MAPGIS二次开发软件Section和Excel软件在编绘矿业权设置方案图件的交互应用与探讨

在矿业权设置方案中,矿业权现状图及矿业权设置平面图分别是一定区域内矿业权现状分布和矿业权设置方案的直观体现。本文详细介绍MAPGIS二次开发软件Section和Microsoft Office Excel软件在编辑制作该类图件的交互应用和体会。     

The choreography of sacrifice: Market environmentalism,biopolitics and environmental damage

Market environmentalism, and, arguably its exemplar carbon forestry, has been engaged within human and economic geography by drawing from the Marxist tradition, and to a lesser extent, utilising post-structuralist lines of enquiry. A direct focus on how practices and transformations related to carbon forestry could be construed as ‘sacrifical’, however, is lacking. This article seeks to remedy this by attending to the biopolitics of climate security discourse and interventions as they localise in an ‘assemblage of market environmentalism’ in Uganda. It charts a choreography of sacrifice that emerges under a neoliberal environmentality within this entity, namely, where the activities and ‘moves’ of both state and non-state actors constitute the grounds for forms of both direct and circuitous bio-cultural sacrifice. Here both surplus populations of people, the non-commercial component of Ugandan forestry, and those forest areas which are not amenable to having ‘nature pay for itself’ through carbon sequestration, are written off through direct violence and degradation, on the one hand, and through the naturalisation of broader processes of deforestation, on the other.     

Plate tectonic settings for Precambrian basic rocks from Brazil by multidimensional tectonomagmatic discrimination diagrams and their limitations

Multidimensional discrimination diagrams (2006–2011) for basic and ultrabasic igneous rocks were applied to Precambrian rock suites from the Amazonian and São Francisco cratons, and the Tocantins Province, Brazil, to infer their possible tectonic settings. The chosen study cases in the Amazonian craton include the ca. 3.0 Ga metabasalts of the Identidade greenstone belt, 1.87–1.80 Ga Parauapebas anorogenic basalt-rhyolite dikes, 1.86–1.82 Ga Rio Branco anorogenic gabbro-basalt association, ca. 1.76–1.74 Ga Aripuanã and Teles Pires intracratonic basalt-felsic volcanic associations, and 1.76–1.74 Ga Jamari and 1.60–1.53 Ga Serra da Providência arc-related gabbroic rocks. In the São Francisco craton, we selected 1.48 Ga arc-related amphibolites of the Rio Capim greenstone belt, continental mafic dikes of Uauá (2.6 Ga), Curaçá and Chapada Diamantina (1.5 Ga), and Espinhaço (ca. 1.0 Ga). In the Tocantins Province, ca. 3.0 Ga komatiites associated with oceanic basalts of the Crixás and Guarinos greenstone belts were studied. The application of the diagrams generally provided consistent results with the authors’ proposed tectonic settings based on field relationships and geochemical data. The exceptions are some within-plate (continental) mafic dikes and basalts for which our diagrams do not work well. For comparison, we also used two ternary and two bivariate traditional discrimination diagrams for the data from the Amazonian craton, whose results were poorer than the newer multidimensional diagrams.