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反射率一阶微分
相关语句
  first derivative reflectance
    Precision evaluation indicated that the exponential model derived from the first derivative reflectance at 1 954 nm was the best for the estimation of corn crude fat content.
    对所构建的方程采用3类指标进行精度检验,认为由1 954 nm处光谱反射率一阶微分所构建的指数模型可对玉米粗脂肪含量较好地预测。
短句来源
    The leaf reflectance spectra (R), lg(1/R), standard first derivative reflectance spectra (FD) and absorption band depths following the continuum removal and normalization (BN) of Changyou 1 and Wujing 15 were measured and calculated. The relationship between different spectral performances and rice leaf chlorophyll contents was analyzed. Then the statistic equations between leaf chlorophyll contents and different spectral performances were established, and a comparison was made between them.
    通过对常优1号和武粳15两个品种水稻叶片的反射率R、lg(1/R)、反射率一阶微分(FD)和反射率归一化(BN)等光谱形式的测量和计算,分析了叶片光谱不同变化形式与叶绿素含量的相关关系,建立了统计方程,并进行了比较与评价,同时,对反演方程的最佳波段选择进行了探讨。
短句来源
  first derivative reflectance
    Precision evaluation indicated that the exponential model derived from the first derivative reflectance at 1 954 nm was the best for the estimation of corn crude fat content.
    对所构建的方程采用3类指标进行精度检验,认为由1 954 nm处光谱反射率一阶微分所构建的指数模型可对玉米粗脂肪含量较好地预测。
短句来源
    The leaf reflectance spectra (R), lg(1/R), standard first derivative reflectance spectra (FD) and absorption band depths following the continuum removal and normalization (BN) of Changyou 1 and Wujing 15 were measured and calculated. The relationship between different spectral performances and rice leaf chlorophyll contents was analyzed. Then the statistic equations between leaf chlorophyll contents and different spectral performances were established, and a comparison was made between them.
    通过对常优1号和武粳15两个品种水稻叶片的反射率R、lg(1/R)、反射率一阶微分(FD)和反射率归一化(BN)等光谱形式的测量和计算,分析了叶片光谱不同变化形式与叶绿素含量的相关关系,建立了统计方程,并进行了比较与评价,同时,对反演方程的最佳波段选择进行了探讨。
短句来源
  “反射率一阶微分”译为未确定词的双语例句
    The hyperspectral reflectances of leaf,stem,ear and sheath and corresponding crude fat content in six kinds of corn(Zea mays L.) were determined. Correlation coefficient between crude fat content and spectral measurements was calculated.
    通过测定不同品种玉米不同器官(叶片、茎、穗和叶鞘)的室内光谱反射率及其对应的粗脂肪含量,采用相关性分析以及单变量线性拟合分析技术,对粗脂肪含量与原始光谱反射率、光谱反射率一阶微分之间的关系进行了分析。
短句来源
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  first derivative reflectance
The correlogram between first derivative reflectance values and infiltration rates in Grumosol.
      
The relationships between soil first derivative reflectance values at 2.182 and 1.431 m and the infiltration rates in Grumosol.
      


The paper studied the variational process of leaf area index (LAI), leaf chl orophyll density (CH.D) and Hyperspectral data with growing period. The correla tion between the hyperspectral data and LAI, CH.D of rice was also analyzed. Sp ectral derivative technique was used to suppress the effects of low frequency sp ectral noises on background (such as Soil and so on). The derivatives of relfect ance spectrum can enhance the correlation and improve the precision of predictin g LAI and CH.D. Results show that...

The paper studied the variational process of leaf area index (LAI), leaf chl orophyll density (CH.D) and Hyperspectral data with growing period. The correla tion between the hyperspectral data and LAI, CH.D of rice was also analyzed. Sp ectral derivative technique was used to suppress the effects of low frequency sp ectral noises on background (such as Soil and so on). The derivatives of relfect ance spectrum can enhance the correlation and improve the precision of predictin g LAI and CH.D. Results show that the derivatives of reflectance spectrum and CH .D more markedly correlate with LAI at some wavelength; CH.D is more av ailable to express crop canopy spectral information than LAI.

分析了北京大屯科技站水稻叶面积指数 (LAI)、叶绿素密度 (CH .D)与高光谱分辨率遥感数据在整个生育期内的变化过程。利用微分技术处理水稻群体反射光谱以减少土壤等低频背景光谱噪音的影响。通过单相关分析和逐步回归方法研究水稻LAI、CH .D分别与光谱反射率、反射率的一阶微分光谱的相关关系 ,并建立预测回归方程。结果表明 ,微分技术能够改善光谱数据与LAI、CH .D的相关性 ,CH .D与光谱数据的相关明显优于同LAI的。

The paper studied the variation of leaf area index (LAI),leaf chlorophyll content (CHL.C),fresh leaf chlorophyll density (CHL.D) and hyperspectral data in growing period on rice field plots of different nitrogen levels.The correlations between the hyperspectral data and above parameters of rice were analyzed. Spectral derivative technique was used to suppress the effects of low frequency background spectral noises (such as soil and so on).The derivatives of reflectance spectra can enhance the correlation and...

The paper studied the variation of leaf area index (LAI),leaf chlorophyll content (CHL.C),fresh leaf chlorophyll density (CHL.D) and hyperspectral data in growing period on rice field plots of different nitrogen levels.The correlations between the hyperspectral data and above parameters of rice were analyzed. Spectral derivative technique was used to suppress the effects of low frequency background spectral noises (such as soil and so on).The derivatives of reflectance spectra can enhance the correlation and improve precision in predicting LAI, CHL.C, CHL.D.Results show that the relationship of LAI ,CHL.C, CHL.D with the derivatives of reflectance spectra more markedly correlate of with reflectance spectra at some wavelength.

通过田间小区试验 ,获取水稻整个生育期内不同氮素处理的叶面积指数 (L AI)、叶片叶绿素含量 (CHL.C)、叶绿素密度 (CHL.D)与高光谱分辨率遥感数据。分析其变化过程 ,并利用微分技术处理水稻群体反射光谱以减少土壤等低频背景光谱噪音的影响。通过单相关分析和逐步回归方法研究水稻LAI、CHL.C、CHL .D分别与光谱反射率、反射率的一阶微分光谱的相关关系。结果表明 ,微分技术能够改善光谱数据与 LAI、CHL .C的相关性 ,而与鲜叶 CHL .D的相关性较低。

Chaohu Lake is one of the biggest freshwater lakes of China. This study was conducted to establish correlations between reflectance spectra and contents of chlorophyll a in Chaohu Lake, which was in eutrophic status. Reflectance spectra were measured during November, 2001 by using ASD FieldSpec HandHeld radiometer. Water samples for chlorophyll a measurements and dominant algal species determination were collected at the same time. The features of the spectral reflectance of the lake were discussed. The correlation...

Chaohu Lake is one of the biggest freshwater lakes of China. This study was conducted to establish correlations between reflectance spectra and contents of chlorophyll a in Chaohu Lake, which was in eutrophic status. Reflectance spectra were measured during November, 2001 by using ASD FieldSpec HandHeld radiometer. Water samples for chlorophyll a measurements and dominant algal species determination were collected at the same time. The features of the spectral reflectance of the lake were discussed. The correlation between the spectral reflectance of single band and the content of chlorophyll a was low. The reflectance ratio of R 705nm / R 680nm and the reflectance first derivative of 690nm were found to be significantly correlated with the contents of chlorophyll a, and the r 2 gained using the reflectance ratio was higher than gained from the reflectance first derivative of 690nm's.

利用高光谱地物光谱仪在巢湖进行了反射光谱测量和同步水质采样分析 .在分析巢湖水体反射光谱特征的基础上 ,通过研究水体光谱反射率与叶绿素浓度之间的关系 ,利用反射率比值法和一阶微分法分别建立了叶绿素a的遥感定量模型 .结果表明反射率比值R70 5nm/R680nm和 6 90nm反射率的一阶微分均与叶绿素a浓度有较好的相关性 ,且用反射率比值法估算叶绿素a效果较好 .

 
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