甘肃两河口地区水系沉积物异常评价   总被引：2，自引：0，他引：2  

苟建德  朱从龙  谢洪春  景煜瑧 《物探与化探》2008,32(2):135-138

对两河口地区1:5万水系沉积物资料处理,圈定了大量元素异常。应用R型因子分析结果,划分元素组合。从元素组合特征方面分析,评价异常找矿意义,确定了7个找矿远景区,其中1号异常为最佳找矿靶区。  相似文献   

Study on the connectivity of heavy oil reservoirs by ultraviolet spectrum technique in the western part of the QHD32-6 oilfield     

Yaohui Xu  Dan Chen 《中国地球化学学报》2008,27(3):306-309

As a new method, the ultraviolet spectrum technique is applied to studying the connectivity of biode-gradable heavy oil reservoirs. The similarity of crude oils can be judged according to the extinction coefficient （E） because aromatic hydrocarbons and non-hydrocarbons have conjugated bonds and obvious absorption in the ultraviolet range, and different materials have different characteristics and additives. The relationship diagram is made in terms of the extinction coefficients （E） of the samples by taking E as the Y-axis and wavelength as the X-axis. The connectivity of oil reservoirs is estimated according to the curve positions and characteristic fingerprints of the sampies. The connectivity of part of the reservoirs in the western part of the QHD32-6 oilfield was studied with this method. The results showed that the connectivity of samples from wells F7 and F8 in the Nm-2 oil reservoir zone is good, that of samples from wells F17 and F20 in the Nm-1 oil reservoir zone also is good, and that of samples from wells F17, F19, and F20 is poor.  相似文献   

南京市大比例尺地形图的动态更新和维护研究   总被引：1，自引：0，他引：1  

谢士杰 《测绘通报》2008,(1):46-49

城市规划需要现势性强的全覆盖的城市大比例尺地形图,城市规划、建设导致地形图的快速变化。如何处理这一对矛盾,最大程度地实现测绘对城市规划、建设和管理的保障,是一个难题。将测绘与规划管理的日常业务进行结合,提出一整套城市大比例尺地形图的动态更新和维护的方法,制定相应的数据标准和规范,研制了支撑平台,并在浦口区进行实践,具有较强的可操作性。  相似文献   

Geochemical Mapping: With Special Emphasis on Analytical Requirements     

XIE Xuejing  CHENG Hangxin  LIU Dawen 《《地质学报》英文版》2008,82(2):451-462

More than 40 national and regional geochemical mapping projects in the world carried out from 1973 to 1988 do not conform to common standards. In particular they have many analytical deficiencies. In the period 1988 to 1992, the International Geochemical Mapping project （Project 259 of UNESCO＇s IGCP Program） prepared recommendations designed to standardize geochemical mapping methods. The analytical requirements are an essential component of the overall recommendations. They included the following： 71 elements should be analyzed in future mapping projects; the detection limits of trace and ultratrace elements must be lower than the corresponding crustal abundances; and the Chinese GSD and Canadian STSD standard sample series should be used for the correlation of global data. A proposal was also made to collect 5000 composite samples, at very low sampling densities to cover the whole Earth＇s land surface. In 1997 an IUGS Working Group on Global Geochemical Baselines was formed to continue the work which began with IGCP 259. From 1997 up to now, new progress has been made especially in China and FOREGS countries under the aegis of this working group, including the study of suitable sampling media, development of a multi-element analytical system, new proficiency test for selection of competent laboratories and role of wide-spaced mapping in mineral exploration. One of the major problems awaiting solution has been the inability of many laboratories to meet the IGCP recommendations to generate high quality geochemical maps. Fortunately several laboratories in China and Europe have demonstrated an ability to meet the requirements and they will be well placed to render technical assistance to other countries.  相似文献   

Distribution of Palygorskite in the Lingtai Profile of Chinese Loess Plateau: Its Paleoclimatic Implications     

XIE Qiaoqin  CHEN Tianhu  Chen Jun  Ji Junfeng  XU Huifang  XU Xiaochun 《《地质学报》英文版》2008,82(5):967-974

Palygorskite is a typical indicator mineral of the arid and strong evaporation environment. Distribution of palygorskite in loess-red clay sequences may act as an important indicator for reconstruction of the paleoenvironment and paleoclimate. In this paper, field emission scanning electron microscope and high-resolution transmission electron microscope observations on the red clay-loess-paleosol of the Renjiapo profile at Lingtai, Gansu Province indicate that palygorskite occurs widely in red clay sequences formed before 3.6 Ma, but no occurrence has been found in eolian sediments since 3.2 Ma. Micromorphological features and microstructure of palygorskite show that it is an autogenic mineral formed during pedogenesis, and transformed from iilite-montmorilionite under the pore water action. In the Lingtai profile, the disappearance horizon of palygorskite is consistent with those of increasing magnetic susceptibility, dust flux and depositional rate. The distribution of palygorskite in the profile indicates that the interval of around 3.6 Ma was an important transformation period of the East Asian paleomonsoon, when changes took place in the East Asia paleoclimate pattern, i.e. a high-frequency strong fluctuation alternative evolution of the environment. Therefore, palygorskite is a key indicator mineral of the East Asian paleomonsoon evolution of that time.  相似文献   

建立影像地图集生产系统,提高实践性教学质量     

唐三林  王光霞  谢耕 《测绘工程》2008,17(2):77-80

结合《苏州市影像地图集》的设计和研制,着重讨论基于新技术进行影像地图集生产的软硬件环境,以及通过对新技术的生产流程、过程控制方法等关键环节的技术研究和实践,建立了影像地图集生产实践教学系统。该系统为教师提供了先进的科学研究、技术开发和技术应用环境和条件,为开展实践性教学和进行地图集设计、生产提供理论和技术指导。  相似文献   

天宝GEOXT数据采集模式及精度研究     

谢宏全  周立  马迁  吴少辉 《测绘工程》2008,17(4):1-3

随着经济的不断发展,移动GIS越来越受到人们的关注,而GEOXT的出现正是符合这一发展趋势的产物。GEOXT这一款仪器将GPS与GIS结合在一起,利用GPS技术得出GIS的成果。文中在说明天宝GEOXT数据采集系统配置及特点的基础上,通过实验总结了数据采集的3种模式：单机码相位测距、后差分改正和实时差分改正数据采集,并对数据采集的技术流程、点位精度、特点和应用范围进行了阐述。最后对不同采集时间间隔对精度的影响进行了试验研究。  相似文献   

基于GIS的北京城市形态研究   总被引：1，自引：0，他引：1  

吴琼  HU Dan  李宏卿  YANG Guo-dong  何永  WANG Bi-hui  刘莉 《世界地质》2008,27(2)

经典的城市形态理论包括同心圆理论、扇形理论和多核心理论.利用2002年北京市土地利用图,采用GIS缓冲区分析的方法,分析了北京市各功能用地的方向特征和圈层特征.结果表明:北京市的土地利用体现了明显的圈层特征,同时各类功能用地在各方向的分布又明显受到了河流、交通干道和工业区等地理要素的影响.北京没有形成城市总体规划的多中心布局,第一道绿化隔离地区中绿地面积没有明显高出其他地区,基本上已经失去了中心城区和边缘集团隔离开的功能.总体上,北京城市空间形态主要是同心圆和扇形的结合,更接近同心圆理论和扇形理论的混合形式.  相似文献   

MS SQL Server渗透测试方法     

谢朝海  王建法  董平 《国土资源信息化》2008,(5):35-38

当前电子政务、电子商务和企业内部的很多数据和敏感信息都存放在MS SQL Server数据库中,但是SQL Server数据库的安全性却一直没有像操作系统和网络设备那样受到应有的重视,得到恰当的测试评估。鉴于此,本文提出可以利用两类不同的安全漏洞对SQL Server数据库进行渗透测试,给出具体的测试方法,用以指导信息系统数据库管理员进行自测试评估,及时发现存在的严重安全漏洞,以进一步采取措施,进行漏洞修补。  相似文献   

云南公路滑坡稳定性分析中模糊信息分析法的应用   总被引：1，自引：0，他引：1  

李瑞娥  谢永利  王家鼎 《工程地质学报》2008,16(1):130-134

将模糊信息分析方法应用于公路滑坡稳定性分析。运用模糊信息分析中的模糊信息信息分配、信息集中等方法,在云南元磨高速公路滑坡的50组公路滑坡资料中选取了滑坡高度、坡度、组成物质的粘聚力、内摩擦角等重要影响因素,建立了其与滑坡稳定性之间的模糊关系,得到相应的滑坡稳定性分析数学模型。应用该模型对该区域其他滑坡进行验证,其效果良好,故该方法可较好的应用于实际。  相似文献