一类新的变比例尺地图投影——组合投影研究

以常用地图投影为基础,通过组合投影方法,得到一类新的变比例尺地图投影。该研究开拓了常用地图投影的功能和应用范围,获得了系统的理论结果和应用实例。     

新集矿井二含水位动态特征及水源地开发

在分析新集矿井二含水的动态特征、富水性,以及二含与一含、三含和基岩之间的水力联系的基础上,对二含富水性进行了分区,提出了木源地的开发和水源井合理布置建议。     

土地利用动态监测的LFF图像融合改进应用

遥感是快速获取土地利用/土地覆盖现势信息的重要手段之一。由于不同类型的卫星传感器获取同一地区的遥感数据日益增多,对不同平台、不同光谱响应范围的遥感数据源,用常规的遥感图像融合方法如HSI变换法、Brovey变换法和PCA变换法进行融合时,存在不同程度的光谱扭曲现象,即融合后图像的色彩与多光谱图像存在较大差异,从而影响了地物的识别。针对不同平台、不同光谱响应范围的遥感数据,本文在HSI变换的基础上,提出了一种改进的方法,即,首先对高几何分辨率的全色波段进行LoG滤波,然后将LoG滤波后的全色波段与多光谱经HSI正变换后的强度分量,进行灰度直方图匹配,并替换之,经HSI逆变换便得到融合图像。分析结果表明：LFF融合法的光谱保持性能优于HSI变换法,LFF融合后图像的分类精度高于HSI融合后的图像,LFF融合法是一种能较好保持光谱特性的融合方法。     

太湖流域浙西区不同农业土地类型的面源污染产出

This paper takes Zhexi hydraulic region in Taihu Basin as a study area. On the basis of hydraulic analysis function of Arcgis8.3, the drainages were delineated by selecting the monitoring points and discharge stations as outlets. The landuse map were finished by denoting the TM/ETM image. The precipitation map was finished by spatial interpolation according to the rainfall monitoring records. Overlaying the drainage boundary, landuse map and precipitation map, the rainfall, different landuse type area, and runoff pollution concentration and runoff were calculated. Based on these data in different sub-watersheds, by Origin7.0 regression tool, an equation is established to predict runoff using the relationships between runoff, precipitation depth and land use patterns in each of the sub-watersheds. Selecting the sub-watershed which is mainly composed of forest landuse type, the mean runoff concentration (MRC) from sub-watershed has been estimated. The mean runoff concentration of farmland has been estimated by the same methods after the contribution of forestlanduse type was removed. The results are“ for the forest landuse type, the mean runoff concentrationsof COD, BOD, Total N and Total P are 2.95 mg/l, 1.080 mg/l, 0.715 mg/l, and 0.039 mg/l,respectively; for the farmland, the mean runoff concentrations of COD, BOD, Total N and Total P are 5.721 rag/l, 3.097 rag/l, 2.092 rag/l, and 0.166 rag/l, respectively. By using these results, the agriculture non-point pollution loads have been assessed. The loads of COD, BOD, Total N and Total P in Zhexi region are 14,631.69 t/a, 6401.93 t/a, 4281.753 t/a and 287.67 t/a, respectively.     

均布荷载作用下挡土墙后粘性填土的土压力计算

基于极限分析下限定理,导出了均布荷载作用下倾斜坡面挡土墙后粘性填土的侧向土压力的解析解,并通过具体数值计算以图表的形式给出了填土摩擦角、无量纲粘结力cγz、无量纲荷载强度qγz及填土表面倾角α等参数不同组合情况下的综合主动和被动土压力系数值,可供工程实践直接采用。在此基础上,就各参数对综合主动和被动土压力系数的影响进行了有意义的探讨     

试论城市群区域内的网络化组织

城市群区域内的网络化是城乡之间多种物质的动态流的最高表现形式，也是城市群形成发展过程中理想的城市化模式。在基础设施比较完善的区域内，城市群内网络化组织是比较完善的，具有多种网络化模式。主要研究城市群区域内的网络化基本概念、空间结构模式、以及网络化城市群内人流、物流、信息流的重要作用。通过深层次的网络化空间组织合理性的研究，尽力表现在市场经济体制下，调节有序的经济活动与无序的指挥之间的矛盾，提高城市综合实力。     

青海省温泉水库近场区活动断裂特征

在全面收集和总结前人工作资料的基础上，采用野外地震地质学研究方法，结合浅层地震勘探、断层气测量、开挖探槽、年代测样等丰富的第一手资料，综合分析总结了青海省格尔木市温泉水库近场区内活动断裂的特征及其古地震形变遗迹。特别是对穿越坝体的京昆仑活动断裂进行了更为详细的研究，总结出它是全新世以来经过多期强烈活动，水平位移达40～80m，平滑速率为7．5～9．5mm／a，是古地震遗迹十分状观的一条岩石围深大断裂。     

福建紫金山陆相火山岩型Cu－Au矿田区域地质地球化学异常结构模式

矿床模式是目前国内外的研究热点之一。各种各样的地质找矿模型与模式层出不穷，也建立了一些地球化学找矿模型。但是它们基本上是建立在矿床原生晕基础上的，以区域地球化学资料为基础建立的矿床或矿田区域地球化学异常模式尚属少见。本文以矿田为基础研究单元，以１：２０万区域化探扫面资料为基础，从矿田的区域地质背景特征和３９种元素的正、负区域地球化学异常分布规律出发，研究了成矿的区域地质环境和地球化学环境。发现成矿元素异常组合、指示元素异常组合和成矿环境元素异常组合的空间分布，在矿田上具有独特的结构特征，提出了异常结构模式的概念。进而总结出了紫金山矿田的区域地质地球化学异常结构模式。     

Construction and implementation of multisource spatial data management system of China''s coastal zone and offshore

To meet the increasing demand of national spatial database infrastructure construction and application, a concept model of China‘ s coastal zone scientific data platform is established based on the information feature analysis of a compound dataset, consisting of remote sensing data and conventional data. Based on this concept model, the detailed logical database structure and the storage strategy of remote sensing data and their metadata using ArcSDE are designed. The complicated technology of multisources data combination in this research is crucial to the future coastal zone and offshore database construction and practical running, which will provide intelligent information analysis and technological service for coastal zone and offshore investigation, research, development and management.     

Technical foundation research on high resolution remote sensing system of China’s coastal zone

1IntroductionCoastalzoneisthemostdynamicpartoftheearthsystem,andalsotheveryvulnerablere-gionofecosystembalance.Forthisreason,theChinesegovernmentattachesgreatimportancetotheproblemssuchaseco-environment,itsex-ploitationandutilization,aswellassustainabledevelopment.Asweknown,thelengthofcoast-lineofChinais18000kmintotal,andthenum-berofislandslargerthan500km2 isabout6500.Sincethemid-1980s,greateffortshavebeenmadebyChinatocarryoutregularnationwideinvestigationsofthetidal-flatresourcesofcoastalzo…