搜索结果: 46-60 共查到“TM”相关记录191条 . 查询时间(0.051 秒)
RADAR AND TM DATA:TOOLS FOR DESERTIFICATION MONITORING IN CALCHAQUIES VALLEYS (Argentina)
Radar desertification monitoring tools
2015/2/4
There was 75 % of arid and semiarid lands in the Argentine Republic. Desertification/ land
degradation increases ,according to the government 650000 hectareas per year . (PNUMA,1996)
The region of t...
MERGING LANDSAT TM IMAGES AND AIRBORNE PHOTOGRAPHS FOR MONITORING OPENCAST MINE AREA
Landsat images open-pit mine monitoring aerial photographs
2015/2/4
MERGING LANDSAT TM IMAGES AND AIRBORNE PHOTOGRAPHS FOR MONITORING OPENCAST MINE AREA.
INTEGRATION OF MULTITEMPORAL ERS.2 SAR AND LANDSAT TM DATA FOR SOIL MOISTURE ASSESSMENT
Satellite integration soil water land data evaluation
2015/2/3
INTEGRATION OF MULTITEMPORAL ERS.2 SAR AND LANDSAT TM DATA FOR SOIL MOISTURE ASSESSMENT.
运用气相色谱/质谱联用技术(GC/MS)对甘肃永登产黄花蒿挥发油化学成分进行了分析。结合Massworks TM质谱解析软件及NIST谱库检索等手段,确定了黄花蒿挥发油中33种挥发性成分,主要为侧柏酮、桉树醇、邻异丙基甲苯、β-蒎烯、蒿酮、双戊烯和樟脑等。结果显示,Massworks TM技术提供的模拟精准分子量信息对未知化合物的确定具有非常重要的意义,可以为单四级杆质谱确定未知化合物提供重要的依...
USE OF A LANDSAT-TM TIME-SERIES FOR MONITORING EROSION FEATURES IN AREAS OF GOLD EXPLORATION, SERRA TEPEQUéM, RORAIMA STATE, BRAZILIAN AMAZON
Remote Sensing erosion features renewable resources management
2014/12/31
This paper discusses the use of a Landsat-TM time series for monitoring erosion features caused by the action of independent miners (garimpeiros) in the search for gold. Five free-cloud Landsat-TM sc...
SAR AND LANDSAT TM IMAGE FUSION FOR LAND COVER CLASSIFICATION IN THE BRAZILIAN ATLANTIC FOREST DOMAIN
Synthetic Aperture Radar (SAR) Landsat TM Orthorectification Image fusion Gaussian maximum likelihood classification Error matrix
2014/12/29
This paper demonstrates the applicability of Landsat TM and SAR image fusion for land cover classification in the Brazilian Atlantic forest domain. The Atlantic forest is considered one of the most th...
Estimation of Land Cover Change in Brazilian Amazon using Landsat TM Satellite Images
Land Cover Change Brazilian Amazon Landsat TM Satellite Images
2014/12/29
A representative area of Manaus (Brazil) was evaluated using two geo referenced Landsat TM images from August 1990 and May 1992 with TNTmips; four classes of interest were identified and their spatial...
Mass-conserving tracer transport modelling on a reduced latitude-longitude grid with NIES-TM
Mass-conserving tracer transport modelling a reduced latitude-longitude grid NIES-TM
2014/12/9
The need to perform long-term simulations with reasonable accuracy has led to the development of mass-conservative and efficient numerical methods for solving the transport equation in forward and inv...
Environmental monitoring of estuaries: Estimating and mapping various environmental indicators in Matla estuarine complex, using Landsat TM digital data
Estuaries chlorophyll suspended solids salinity temperature turbidity
2014/11/25
The spatial and temporal distribution of suspended solids, turbidity, temperature, salinity,
chlorophyll a and total phosphorus were estimated and mapped with various degrees of
success in Matla E...
Tm,Ho声光调Q激光系统理论与实验研究
激光器 速率方程 Tm,Ho:LuLF 声光调Q
2016/8/10
利用激光速率方程理论,对Tm,Ho激光系统计算预测得出最佳耦合输出透过率和调Q激光脉冲宽度.实验采用Tm, Ho:LuLF为增益介质,三向侧面泵浦,环形腔声光调Q.选用透过率20%和30%的输出镜作对比.在透过率20%耦合输出时,得到调Q激光脉冲能量最大为58.0 mJ,对应光光转换效率为1.45%;在透过率30%耦合输出时,得到调Q激光脉冲能量最大为62.9 mJ,对应光光转换效率1.57%,并...
透明β-NaYF4：Yb,Tm/PMMA 纳米复合材料的制备及其光学性能
上转换发光 掺杂浓度 核壳结构 NaYF4
2014/3/15
采用高温溶剂热法制备了一系列不同Yb3+掺杂浓度的上转换发光纳米粒子β-NaYF4：Yb，Tm和核壳结构的β-NaYF4：Yb，Tm@β-NaYF4：Yb纳米粒子。采用X射线衍射（XRD）、场发射扫描电镜（FESEM）、光致发光（PL）谱对材料的物相结构、形貌特征和发光性质进行了表征和研究，并特别研究了温度对材料发光性能的影响。结果表明：保持Tm3+浓度不变，随着Yb3+掺杂浓度的增加，β-NaY...
室温6.11mJ脉冲LD单端抽运Tm:YAG调Q激光器
2 μm Tm:YAG激光器 脉冲抽运 调Q
2016/8/25
由于2μm波段激光处于大气的窗口上,并且对人眼安全,因而在测风领域具有潜在的应用价值。该波段的激光器可以作为相干多普勒测风雷达和差分吸收雷达的光源。为了进行相干多普勒测风雷达光源的研究,报道了一种脉冲激光二级管(LD)单端抽运Tm:YAG调Q激光器。在实验中,采用L型平凹腔结构,利用声光Q开关实现大能量的激光输出。该激光器输出的激光中心波长为2 014.9 nm,在重复频率为100 Hz情况下,调...
利用简单的高温固相法合成稀土离子掺杂的NaLn4-x(SiO4)3F:xRE3+(Ln=La, Gd; RE=Tb, Dy, Sm, Tm)系列荧光粉,利用X射线粉末衍射仪和荧光分光光度计分别测试其物相结构和荧光性能。结果表明,所合成样品均为纯的六方晶系结构,在紫外光激发下所合成样品均表现出所掺杂稀土离子的f-f特征能级跃迁,Tb3+、Dy3+、Sm3+和Tm3+等激活离子分别发出蓝绿色、白色、橙...
基于中分辨TM数据的水稻提取方法对比研究
水稻 神经网络 面向对象分类 TM影像
2014/11/17
水稻种植面积监测是当前农业土地变化科学的热点问题,但运用遥感技术对水稻种植面积精确实施监测一直是难点。中分辨率遥感影像能够满足我国大面积水稻作物监测,成为业务化运行的主要数据源。为此,该研究尝试以中分辨率 TM影像为数据源,结合神经网络和面向对象 (SVM)两种算法对对黑龙江省富锦市2010年两期不同时相影像分别进行水稻分类提取,并对分类结果进行滤波处理及混淆矩阵精度评定。结果表明:(1)在高纬度...