基于引文网络的Cyberspace研究进展     

陈晓慧  马一薇  刘媛媛 《测绘与空间地理信息》2014,(12)

以Web of Science数据库收录的有关研究Cyberspace的大量文献为数据源,采用文献计量学的分析方法,借助信息可视化软件CiteSpace Ⅱ对所采集的数据进行统计分析;获取1993 ～2013年检索数据,通过可视化图谱的方法挖掘出该领域的研究重点和学科分布;从地理学角度,揭示了该领域的研究热点和方向.  相似文献   

现代测绘技术在公租房建设中的应用与实践     

张平  周召兵  冯盼 《测绘与空间地理信息》2014,(11)

公租房是解决新就业职工、城市困难家庭等住房困难的一种产品。在公租房项目的建设过程中,需要经过立项、选址、报建、建设、竣工验收等多个环节。本文以全国首批开工建设、首批交付使用的的公租房项目———重庆市公租房民心佳园一期为工程实例,介绍了现代测绘技术在公租房建设各个环节中的应用。  相似文献   

市级基础测绘规划编制研究     

刘利  孙威  宁镇亚  阮于洲  熊伟 《测绘与空间地理信息》2014,(11)

编制市级基础测绘规划是《中华人民共和国测绘法》的要求,也是市级基础测绘科学发展的客观需要。本文围绕市级基础测绘工作的主要内容,对市级基础测绘规划编制的背景、原则、现状、面临的形势、主要任务和保障措施等方面进行了研究。  相似文献   

测绘职业技能鉴定命题技巧初探     

朱丽影 《测绘与空间地理信息》2014,(12)

由于当前测绘知识技术更新速度极快,使得测绘职业技能鉴定题库也在不断地更新当中,这就要求命题工作者除了掌握应有的测绘专业技术知识之外,还要不断探索、深入研究命题技术和命题技巧.本文的研究,为进一步实现测绘职业技能鉴定命题工作科学、客观、统一、规范具有一定的现实意义.  相似文献   

综合物探方法在焦家断裂南段金矿找矿中的应用          下载免费PDF全文

曹秀华  孟庆旺  曹亚阳 《山东国土资源》2016,32(8)

阐述了综合物探方法在焦家断裂南段金矿找矿中的应用,运用综合物探方法并结合搜集到测区的高精度重力、高精度磁测、常规电法、电磁法、地质、钻孔资料,对焦家断裂南段进行了综合研究,推断了焦家断裂南段的延伸趋势,探讨并总结了测区金成矿规律,圈定并筛选了3处金矿找矿靶区,表现出了较好的综合物探方法运用效果。  相似文献   

Structural evolution of the Orange Basin gravity-driven system,offshore Namibia     

Jose de Vera  Pablo GranadoKen McClay 《Marine and Petroleum Geology》2010

The Orange Basin records the development of the Late Jurassic to present day volcanic-rifted passive margin of Namibia. Regional extension is recorded by a Late Jurassic to Lower Cretaceous Syn-rift Megasequence, which is separated from a Cretaceous to present day post-rift Megasequence by the Late Hauterivian (ca. 130 Ma) break-up unconformity. The Late Cretaceous Post-rift evolution of the basin is characterized by episodic gravitational collapse of the margin. Gravitational collapse is recorded as a series of shale-detached gravity slide systems, consisting of an up-dip extensional domain that is linked to a down-dip zone of contraction domain along a thin basal detachment of Turonian age. The extensional domain is characterized by basinward-dipping listric faults that sole into the basal detachment. The contractional domain consists of landward-dipping listric faults and strongly asymmetric basinward-verging thrust-related folds. Growth stratal patterns suggest that the gravitational collapse of the margin was short-lived, spanning from the Coniacian (ca. 90 Ma) to the Santonian (ca. 83 Ma). Structural restorations of the main gravity-driven system show a lack of balance between up-dip extension (24 km) and down-dip shortening (16 km). Gravity sliding in the Namibian margin is interpreted to have occurred as a series of episodic short-lived gravity sliding between the Cenomanian (ca. 100 Ma) and the Campanian (ca. 80 Ma). Gravity sliding and spreading are interpreted to be the result of episodic cratonic uplift combined with differential thermal subsidence. Sliding may have also been favoured by the presence of an efficient detachment layer in Turonian source rocks.  相似文献   

Petrogenesis and implications of jadeite‐bearing kyanite eclogite from the Sanbagawa belt (SW Japan)     

S. Endo  M. Tsuboi 《Journal of Metamorphic Geology》2013,31(6):647-661

Jadeite‐bearing kyanite eclogite has been discovered in the Iratsu body of the Sanbagawa belt, SW Japan. The jadeite + kyanite assemblage is stable at higher pressure–temperature (P–T) conditions or lower H₂O activity [a(H₂O)] than paragonite, although paragonite‐bearing eclogite is common in the Sanbagawa belt. The newly discovered eclogite is a massive metagabbro with the peak‐P assemblage garnet + omphacite + jadeite + kyanite + phengite + quartz + rutile. Impure jadeite is exclusively present as inclusions in garnet. The compositional gap between the coexisting omphacite (P2/n) and impure jadeite (C2/c) suggests relatively low metamorphic temperatures of 510–620 °C. Multi‐equilibrium thermobarometry for the assemblage garnet + omphacite + kyanite + phengite + quartz gives peak‐P conditions of ~2.5 GPa, 570 °C. Crystallization of jadeite in the metagabbro is attributed to Na‐ and Al‐rich effective bulk composition due to the persistence of relict Ca‐rich clinopyroxene at the peak‐P stage. By subtracting relict clinopyroxene from the whole‐rock composition, pseudosection modelling satisfactorily reproduces the observed jadeite‐bearing assemblage and mineral compositions at ~2.4–2.5 GPa, 570–610 °C and a(H₂O) >0.6. The relatively high pressure conditions derived from the jadeite‐bearing kyanite eclogite are further supported by high residual pressures of quartz inclusions in garnet. The maximum depth of exhumation in the Sanbagawa belt (~80 km) suggests decoupling of the slab–mantle wedge interface at this depth.  相似文献   

空间异质性定量研究方法   总被引：8，自引：2，他引：6  

岳天祥 《地球信息科学学报》1999,1(2):75-79

空间异质性是景观生态学定量化研究的核心,其定量研究方法包括景观综合图、数学模型和地学信息图谱.本文概括总结了景观综合图的内容和定量化指标,分析了这种定量化方法的优势和局限;对数学模型的复杂性、优点和与景观综合图的互补性作了简要分析,指出了数学模型研究需要进一步探讨和重视的问题;通过对地学信息图谱三个阶段(景观制图实验,图谱概念的提出和地学信息图谱理论的形成)的回顾和对其特点的分析,我们认为地学信息图谱综合了景观综合图和抽象的数学模型可以提供的互补信息,吸收了两者的优点,是空间异质性的综合定量研究方法.  相似文献   

大比例尺地形图更新问题探讨     

张建辉  陈景新  罗永贤 《北京测绘》2010,(4):33-34,38

近年来,城市发展变化非常快,地形图更新滞后于城市发展,研究城市大比例尺地形图更新问题很有必要。本文阐述了地形图更新的方法,主要有数字摄影测量更新、利用高分辨率遥感影像更新、数字化测图更新以及借助其它项目资料进行更新等方法,并探讨了城市大比例尺地形图更新周期问题。  相似文献   

移动设备外业调绘系统研制   总被引：1，自引：1，他引：0  

洪亮  罗伊  蔡冰  蔡金全  王艳 《地理空间信息》2010,8(2):23-25

随着移动设备的发展使得外业调绘野外作业数字化作业变为可能。通过分析外业调绘的作业方式、要求,探索移动设备性能,研制了基于移动设备野外调绘的系统。  相似文献