长期以来，研究植物的科学家采用卫星测量植被的新鲜指数，即观测植物反射阳光值，预测植物的状态。 植物新鲜指数的变化是季节性的。
Scientists who study plants and trees from space have long relied on satellite-derived measures of “greenness”—that is, observations of the amount of sunlight reflected by vegetation.
试验结果表明，在单对数坐标中土壤的微波反射损失随其圆锥指数增加而呈线性减少。
The results show a definite correlation between the microwave reflection loss and soil strength expressed in term of cone index.
主要指标水肿指数e和信号宽度W及反射图的形态特征。
Main Outcome Measures Edema index (e value), signal width value (w value) and features of reflectance pictures.
地面衰减，屏蔽，反射，指向性指数的影响。
Influence from Ground Attenuation, Screening, Reflection, Directivity Index.
金属矿物反射色颜色指数是金属矿物重要的定量鉴定数据。
The reflection color indices of ore minerals is important quantitative data of distinguishing ore minerals.
本文阐述了颜色指数的视觉反射率、色调、饱和度、色度坐标在定性观察方面的应用。
The application of visual reflectance, colour tone, saturation degree and colorimetric coordinates of colour index are all useful for qualitative observation.
在地温场的作用下，样品的镜质体反射率与埋深呈指数关系。
Controlled by geothermics, the vitrinite reflectance of samples shows an exponential relation with depth.
结果表明，光谱指数与覆盖度的相关性远远高于光谱反射率与覆盖度的相关性。
The results showed that spectral indices have much higher correlation coefficients with fractional cover than does spectral reflectance.
通过分析水稻叶片氮含量与冠层光谱反射率及植被指数之间的相关性和定量关系，测试并评价便携式作物氮素监测仪的工作性能。
The correlations and the quantitative relationships between LNC and rice canopy reflectance spectra were analyzed, and the performance of portable nitrogen monitoring instrument was evaluated.
反映土壤含水量和叶面积指数共同作用的地表反射率模型的模拟值与野外实测值具有较好的一致性。
A model for the surface albedo responding to SWC and LAI was developed, which showed a good performance in consistent between simulated and observed surface albedo.
反映土壤含水量和叶面积指数共同作用的地表反射率模型的模拟值与野外实测值具有较好的一致性。
A model for the surface albedo responding to SWC and LAI was developed, which showed a good performance in consistent between simulated and observed surface albedo.
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