normalized difference vegetation index造句
例句與造句
- Advances in drought monitoring by using remotely sensed normalized difference vegetation index and land surface temperature products
基于植被指數(shù)和土地表面溫度的干旱監(jiān)測(cè)模型 - Then based on the method of dimidiate pixel model , the current model is improved , and the model of deriving vegetation fraction from normalized difference vegetation index ( ndvi )
然后在像元二分模型的基礎(chǔ)上對(duì)已有模型進(jìn)行改進(jìn)，建立用ndvi歸一化植被指數(shù)估算植被覆蓋度的模型。 - This technique is mainly involved two steps : 1 ) vegetation effects correction : we used ndvi ( normalized difference vegetation index ) derived from tm and avhrr measurements for spatial and temporal variations of vegetation covers at different scales
但由于電磁波與地表相互作用的復(fù)雜性，雷達(dá)后向散射系數(shù)除受地表介電常數(shù)(土壤水分)影響外，還受到地表粗糙度、土壤類型、植被覆蓋以及雷達(dá)入射角、頻率、極化等多種因素的影響。 - After analysis of tm / etm + data ' s advantage over the forest change detection , tasseled cap transformation , principal component analysis and normalized difference vegetation index were chosen to enhance the vegetation spectral information . expert classification system was adopted to extract the main tree species in the littoral shelter forest
在分析etm +數(shù)據(jù)在森林資源監(jiān)測(cè)中的優(yōu)勢(shì)的基礎(chǔ)上，通過(guò)纓帽變換、主成分分析和植被指數(shù)法增強(qiáng)植被光譜信息，結(jié)合專家分類系統(tǒng)對(duì)沿海防護(hù)林主要樹(shù)種進(jìn)行提取。 - The authors have developed a device for measuring the normalized difference vegetation index ( ndvi ) by using four specially designed photoelectric detectors ; the ndvi can reflect the growing information and seasonal nitrogen fertilizer requirement of crops , and offers guidance for rational application of nitrogen fertilization
文中提出了一種由4個(gè)專門(mén)設(shè)計(jì)的光電探測(cè)器直接得到歸一化植被指數(shù)的測(cè)量方法，該參數(shù)能夠反映作物的生長(zhǎng)狀態(tài)，知道不同季節(jié)的農(nóng)作物對(duì)氮的需求量，對(duì)實(shí)施變量精準(zhǔn)施肥具有重要的指導(dǎo)作用。 - It's difficult to find normalized difference vegetation index in a sentence. 用normalized difference vegetation index造句挺難的
- Firstly , this dissertation estimated the size of carbon source ; sink and net carbon sink of farmland ecosystems in china costal regions ( including ten provinces ) with statistic data from 1981 to 2001 , which include data of crop yield and agricultural consumptions . then analyzed the temporal - spatial differences of carbon source , sink and net carbon sink of china costal farmland ecosystems . secondly , estimated npp ( net primary productivity ) of farmland ecosystems in china costal regions with per month noaa - avhrr ndvi ( normalized difference vegetation index ) data and estimation model
本文首先運(yùn)用1981 - 2001年的統(tǒng)計(jì)資料(作物產(chǎn)量和各種途徑的農(nóng)業(yè)投入數(shù)據(jù)) ，對(duì)沿海十省區(qū)農(nóng)田生態(tài)系統(tǒng)碳源匯及凈碳匯進(jìn)行了估算，并分析了其時(shí)空差異；然后運(yùn)用1998年逐月ndvi數(shù)據(jù)通過(guò)建模對(duì)沿海地區(qū)農(nóng)田生態(tài)系統(tǒng)npp進(jìn)行了估算，并分析了npp分布與農(nóng)田生態(tài)系統(tǒng)碳吸收的相關(guān)性；最后通過(guò)對(duì)農(nóng)田生態(tài)系統(tǒng)碳源匯的影響因素分析，提出了不同的農(nóng)田生態(tài)系統(tǒng)碳增匯減排技術(shù)。