搜索结果: 1-15 共查到“知识库 LU”相关记录69条 . 查询时间(0.046 秒)
THE SPATIAL-TEMPORAL ANALYSIS OF ECOLOGICAL ENVIRONMENT OF RED BED HILLS IN EAST SICHUAN - TAKING LU COUNTY AS A CASE
Ecologic environment Hilly area AHP (Analytic Hierarchy Process) RS GIS
2018/5/15
Good ecological environment is the foundation of human existence and development, the development of society and economy must be based on the premise of maintaining the stability and balance of the ec...
Weak extinction versus global exponential growth of total mass for superdi usions corresponding to the operator Lu + βu − ku2
superdiffusion superprocess measure-valued process gauge theorem Kato class growth bound
2016/1/25
Consider a superdiffusion X on R d corresponding to the semilinear operator A(u) = Lu + βu − ku 2 , where L is a second order elliptic operator, β(·) is in the Kato class and bounded from above,...
Weak extinction versus global exponential growth of total mass for superdi usions corresponding to the operator Lu + βu − ku2
superdiffusion superprocess measure-valued process gauge theorem Kato class growth bound principal eigenvalue
2016/1/20
Consider a superdiffusion X on R d corresponding to the semilinear operator A(u) = Lu + βu − ku 2 , where L is a second order elliptic operator, β(·) is in the Kato class and bounded from above,...
多期变质变形事件的精确年代限定是造山构造年代学研究的热点问题之一。本文尝试运用面理弯切轴测量技
术，结合石榴石 ＬｕＨｆ和原位独居石 ＵＰｂ定年，厘定北祁连托勒牧场地区石榴石和斜长石斑晶记录的两期构造变形事件：石
榴石斑晶生长记录的早期构造变形事件年代为５１２３±２７Ｍａ；斜长石斑晶生长记录的晚期构造变形事件年代不早于４８１０±
２３Ｍａ，并推断该期构造变形水平挤压主应力方向为北...
Image-based Versatile Lu Information: a Multidimensional Classification Scheme to Support Local Planning in Indonesia
Remote sensing Land-cover Land-use
2015/7/7
Land-cover (LC) and Land-use (LU) are recognised as important factors in environmental assessment and planning. However,
different applications normally require different LC/LU information contents. ...
Stable and efficient updates to the basis matrix factors are vital to the simplex
method. The "best" updating method depends on the machine in use and how the update is implemented. For example, the ...
Some aspects of alder decline along the Lužnice River
Alnus decline tree-ring study fungi pathogens environmental stress
2015/2/6
Alder decline along watercourses is one of the marked manifestations of tree decline in the Czech Republic. Local decline of alder trees is documented in the Czech Republic for about 15 years. The aim...
麦卡因大型VMS型Au-Ag-Cu-Zn-Pb矿床位于中哈萨克斯坦西北部的Baidaulet-Akbastau地区。地质剖面测量和岩石薄片研究表明,麦卡因矿区发育中基性火山岩(玄武岩和安山岩)和次火山岩(辉绿-辉长岩和辉绿岩),矿化主要与安山岩有关。对矿区火山岩地球化学分析表明,矿区岩石分为两种类型:类型Ⅰ为拉斑-钙碱性系列中基性火山岩(玄武岩和安山岩)和次火山岩(辉绿-辉长岩和辉绿岩),岩石具平...
COMBINATION OF TERRASAR-X AND OPTICAL IMAGERY FOR LU/LC MAPPING USING AN OBJECT-BASED APPROACH
LU/LC mapping descriptive feature extraction object-oriented classification
2014/6/5
In this study, the impact of the use of backscattering intensity and texture features obtained from TerraSAR-X images for LULC
classification of agricultural and forest areas, and its combination wi...
南阿尔金茫崖地区早古生代花岗岩锆石SHRIMPU-Pb定年结果表明，阿克提山花岗岩为264±1Ma，柴水沟花岗岩分别为404±5Ma、406±4Ma，其中的辉绿岩为454±4Ma，常春沟花岗岩分别为411±5Ma、406±3Ma，茫崖镇北石英闪长岩为466±5Ma，阿卡龙山花岗岩为469±6Ma。锆石Lu-Hf同位素分析表明，εHf（t）值大多数为正值，少数继承性锆石为负值，反映了它们的源岩以新生...
东江口、柞水和梨园堂岩体位于商丹断裂南侧。锆石的LA-ICP-MSU-Pb年代学分析表明，东江口花岗闪长岩、柞水花岗岩、梨园堂石英二长岩和梨园堂花岗岩等4个样品的岩浆结晶年龄分别为246.8±2.5Ma（早三叠纪），233.6±1.3Ma（中三叠纪），956.1±4.5Ma（新元古代），203.6±2.2Ma（晚三叠纪）。锆石的Lu-Hf同位素原位分析结果表明，锆石的两阶段Hf模式年龄（tDM2）...
对溧水盆地8件典型的中生代次火山岩-侵入岩进行了详细的锆石U-Pb年代学和Lu-Hf同位素研究. 结果显示，老虎头角闪闪长玢岩年龄为130.5±1.6 Ma，大铜山角闪闪长玢岩年龄为136.0±3.4 Ma，大魏庄角闪闪长玢岩年龄为132.7±2.7 Ma，野山凹粗安斑岩年龄为127.0±1.9 Ma，砚瓦桥石英闪长玢岩年龄为129.4±1.7 Ma，西北山辉石闪长玢岩年龄为133.2±2.1 M...
胶西北新城金矿床二长花岗岩岩石地球化学、锆石U-Pb年龄及Lu-Hf同位素组成
Lu-Hf同位素 新城金矿床 胶西北
2014/10/14
胶东是我国最重要的金矿集区，也是环太平洋中、新生代金成矿系统的重要组成部分，其内花岗质岩石分布广泛，95%以上的金资源储量赋存在晚侏罗世玲珑型花岗岩和早白垩世早期郭家岭型花岗质岩中。关于花岗岩类的成因，尤其是早白垩世花岗质岩的岩石类型及其源区仍存有争议。新城金矿床位于胶东西北部焦家断裂带北段，是迄今为止在胶东矿集区内发现的赋存在早白垩世花岗质岩中最大的金矿床，其内已探明金资源储量大于200t。该金...
新疆东天山地区岩浆岩的岩石成因和地球动力学背景备受关注.本文获得的东天山土屋斑岩铜矿床SIMS锆石U-Pb定年、全岩元素地球化学和Lu-Hf同位素数据,以对这一问题进行约束.土屋斑岩铜矿床位于新疆东天山造山带晚古生代大南湖-头苏泉岛弧带中,赋矿地层为下石炭统企鹅山群,赋矿围岩主要为安山岩和闪长玢岩,含矿岩石主要为英云闪长岩.本文SIMS锆石U-Pb定年结果表明,土屋地区含矿岩体大约侵位于335Ma...