搜索结果: 31-45 共查到“工学 NDVI”相关记录58条 . 查询时间(0.031 秒)
NDVI MEASUREMENTS OF NEOTROPICAL SAVANNA PHYSIOGNOMIES A GRADIENT OF: BIOMASS, STRUCTURE AND PHENOLOGY CHANGES
Difference Vegetation Index Classification Dynamics Climate Season Cerrado Phenology Vegetation Physiognomies
2015/1/6
The NDVI (normalized difference vegetation index) has shown to be a good predictor of green vegetation density for several vegetation types. The Brazilian xeromorphic vegetation, called Cerrado, compr...
Deriving crop calendar using NDVI time-series
Agriculture Analysis Detection Semi-automation Temporal Method
2014/12/15
Agricultural intensification is defined in terms as cropping intensity, which is the numbers of crops (single, double and triple) per year in a unit cropland area. Information about crop calendar (i.e...
Assessing Agricultural Vulnerability in India using NDVI Data Products
Agriculture Climate Vegetation Impact Analysis Multisensor Multiresolution Multitemporal National
2014/12/15
Impact of climate change on Indian rainfed agriculture was assessed using temporal NDVI data products from AVHRR and MODIS. Agricultural vulnerability was analysed using CV of Max NDVI from NOAA-AVHRR...
Comparison of Bioclimatic, NDVI and Elevation variables in assessing extent of Commiphora wightii (Arnt.) Bhand
Bioclimatic variables Commiphora wightii Elevation IUCN MaxEnt NDVI
2014/12/15
Commiphora wightii (Arnt.) Bhand., is an important medicinal plant of Indian Medicine System (IMS) since ancient time. It is used in different ailments of obesity, arthritis, rheumatism and high chole...
NDVI from Landsat 8 Vegetation Indices to Study Movement Dynamics of Capra Ibex in Mountain Areas
Capra ibex Landsat 8 Vegetation indices Ethology modelling Pseudo invariant features
2014/9/29
In this study we analyse the correlation between the spatial positions of Capra ibex (mountain goat) on an hourly basis and the information obtained from vegetation indices extracted from Landsat 8 da...
Contribution of MODIS NDVI 250 m Multi-Temporal Imagery Dataset for the Detection of Natural Forest Distribution of Java Island, Indonesia
Java MODIS Multi-Temporal Natural Forest NDVI
2013/3/5
As landmass of the world is covered by vegetation, taking into account phenology when performing land cover classification may yield more accurate maps. The availability of no-cost Moderate Resolution...
NDVI FROM ACTIVE OPTICAL SENSORS AS A MEASURE OF CANOPY COVER AND BIOMASS
Agriculture Farming Vegetation Sensor Spatial Real-time
2014/4/30
Commercially available proximal sensors are being used in precision agriculture to provide non-destructive, real-time spatial information on 'green biomass' that may be of interest to the remote sensi...
SUBDIVISION OF PANTANAL QUATERNARY WETLANDS: MODIS NDVI TIMESERIES IN THE INDIRECT DETECTION OF SEDIMENTS GRANULOMETRY
Vegetation MODIS Geology Comparison Environment Multitemporal TIMESAT
2014/4/30
The Pantanal is the world's largest wetland presenting a variety of ecological sub-regions. The region is characterized by seasonal floods followed by long droughts. At this period, some areas rapidly...
多时相遥感数据能比单一时相反映更多的作物产量信息，挖掘多时相遥感信息以提高作物估产精度具有重要意义。该文以新疆生产建设兵团农一师一团的棉花为研究对象,提出了一种融合分区概念和时间序列NDVI（归一化植被指数）相似性分析的棉花估产方法。首先，通过植被指数与产量的相关性比较分析，确定NDVI为棉花估产因子，在此基础上根据棉花品种和土壤条件的差异，将研究区棉田划分为不同类型的生长区；然后，结合每个生长区...
基于时间序列NDVI相似性分析的棉花估产
分区 NDV 相似性分析 棉花
2012/8/10
多时相遥感数据能比单一时相反映更多的作物产量信息，挖掘多时相遥感信息以提高作物估产精度具有重要意义。该文以新疆生产建设兵团农一师一团的棉花为研究对象,提出了一种融合分区概念和时间序列NDVI（归一化植被指数）相似性分析的棉花估产方法。首先，通过植被指数与产量的相关性比较分析，确定NDVI为棉花估产因子，在此基础上根据棉花品种和土壤条件的差异，将研究区棉田划分为不同类型的生长区；然后，结合每个生长区...
COMPARISON OF GOSAT CAI AND SPOT VGT NDVI DATA WITH DIFFERENT SEASON AND LAND COVER IN EAST ASIA
Comparison Correlation Data Remote sensing Satellite
2014/5/8
The Normalized Difference Vegetation Index (NDVI) has become one of the most widely used indices in remote sensing
applications in a variety of fields. Many studies have compared the NDVI values fo...
SPATIAL PATTERN OF TEMPORAL TREND OF CROP PHENOLOGY MATRICES OVER INDIA USING TIMESERIES GIMMS NDVI DATA (19826ndash;2006)
Crop phenology GIMMS NDVI India TIMESAT Median trend
2014/5/6
NOAA-AVHRR bi-monthly NDVI data of 8×8 km for the period of 1982–2006 were used to analyze the trend of crop phenology matrices over Indian region. Time series principal component analysis of NDVI was...
二维散点-分类NDVI法的邛海湖面积估算研究
BP神经网络 线性分解 面积估算
2009/12/28
针对采用MODIS卫星遥感影像进行水体面积估算时存在大量混合像元的问题，提出了二维散点-分类NDVI法进行小面积水体的面积估算。方法在对250 m分辨率的MODIS第1、2波段数据二维可视化分析的基础上，选取目测即可区分的地物样本点集训练BP神经网络并对实验区像元进行分类判别，提取混合像元。应用线性光谱混合像元分解模型实现水体面积计算。对四川省邛海湖进行面积估算的结果表明，二维散点-分类NDVI法...
广州市土地利用与NDVI变化的关联分析
TM影像 土地利用 NDVI
2009/11/23
利用6S模型对1990年、1995年、2000年及2005年的TM影像进行大气较正，获取4期NDVI和土地利用信息，选择3种土地利用指标与NDVI变化进行相关性分析。结果表明：广州市NDVI平均值具有在1990年～2000年间下降，2000年后略为上升的趋势，NDVI的空间变化趋势与城市发展格局相一致；土地利用程度较高，变化率较大，城市用地扩展强度近期明显增强；将土地利用指标与ND...