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vegetation canopy
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  “vegetation canopy”译为未确定词的双语例句
     Monte Carlo method is a random statistic method,which has been widely used to simulate the Bidirectional Reflectance Distribution Function(BRDF)of vegetation canopy in the field of visible remote sensing.
     蒙特卡罗(MonteCarlo)是一种随机统计方法,被广泛用于模拟可见光森林冠层BRDF(双向反射率分布函数)。
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     This paper discussed the dynamics of vegetation canopies reflectance with vegetation canopy structures by measuring rice canopy structure and bidirectional reflectance at 26, 35, 41, 49, 62, 67 and 86 days after transplanting.
     在大田晚稻 (秀水 6 3)移栽后第 2 6、35、41、49、6 2、6 7和 86d ,对水稻冠层结构及二向反射率进行实测 ,并分析了二向反射率随冠层结构变化规律 .
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     Results(R>0.98 and RMSE<0.05)showed grest correlation between the simulated and real canopyreflectance of winter wheat, demonstrating that radiative transfer model could potentially beused for simulating vegetation canopy reflectance, such as MODIS canopy reflectance.
     3)利用2005年4月21日和2005年5月2日实测的冬小麦各项参数,结合PROSAIL模型,模拟了冬小麦冠层垂直反射率,模拟值与实测值的相关系数R大于0.98,均方根误差RMSE小于0.05,说明该模型对冬小麦冠层光谱的模拟是适用的。
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     Computer Simulation and Validation of BRF Data of Vegetation Canopy
     农作物冠层BRF及波谱的计算机模拟及其验证
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     The following hydrodynamic parameters are used in characterizing the flow regimes: local shear velocity (u *), roughness length (z 0) and vegetation canopy roughness Reynolds number (Re *).
     流场特性可用以下水动力学参数来描述 :摩阻流速 (u* ) ,粗糙长度 (z0 )和植物冠层粗糙雷诺数 (Re* ) .
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  相似匹配句对
     A NEW THERMAL VEGETATION CANOPY MODEL
     一种新的植被热红外辐射模型
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     THE ADVANCE IN MULTI-ANGLE REMOTE SENSING OF VEGETATION CANOPY
     植被冠层多角度遥感研究进展
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     THE VEGETATION OF PEKING
     北京市的植被
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     ⑤vegetation;
     ⑤植被 ;
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  vegetation canopy
In the paper we present the results of experimental modeling the millimeter wave scattering from elements and fragments of a vegetation canopy.
      
Experimental modeling the millimeter wave scattering from vegetation canopy
      
The proton budgets were estimated for three individual compartments of the ecosystem: vegetation canopy, and the upper (O horizon + 0-10 cm) and lower (10-100 cm) soil layers.
      
At both sites, atmospheric S deposition was the dominant proton source in the vegetation canopy.
      
The proton budgets were developed for individual compartments of the ecosystem: vegetation canopy, organic and mineral soil layers.
      
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The method of monitoring growth vigour cf winter wheat and estimating its yield using NOAA AVHRR, Landsat MSS, and spectral data has a good result Yunchen region, south part of Shanxi province.According to agricultural productive level and conditions several regions are divided and sample areas are also selected in these regions using multi-temporal Landsat MSS, NOAA AVHRR, and spectral data. The results of these data analysis show that there are close relationships in following aspects: between spectral index-IR/Red...

The method of monitoring growth vigour cf winter wheat and estimating its yield using NOAA AVHRR, Landsat MSS, and spectral data has a good result Yunchen region, south part of Shanxi province.According to agricultural productive level and conditions several regions are divided and sample areas are also selected in these regions using multi-temporal Landsat MSS, NOAA AVHRR, and spectral data. The results of these data analysis show that there are close relationships in following aspects: between spectral index-IR/Red or (IR -Red)/(IR + Red) of NOAA AVHRR, Landsat MSS and yield of winter wheat, between image density and yiel dof winter wheat, between temperature of vegetation canopy and soil moisture, between image density of NOAA AVHRR Channel 4(thermal) and yield of winter wheat.

根据NOAA气象卫星具有周期短、覆盖面积大、对绿色植被及水份温度反应比较灵敏等特点,作者利用AVHRR甚高分辨率辐射计资料,结合同时期地面样方光谱和有关生物物理指标观测,对山西省运城盆地冬小麦长势进行了监测,并利用中比例尺的MSS彩色合成图像,分区分类测算面积和估算产量。在产量估算精度上有了新的提高。 首先采用多时相陆地卫星像片,按相同的生产条件及生产水平进行分类划区,然后分区设立地面样方,并与气象卫星接收同时进行光谱及生物物理指标观测。资料分析结果表明:地面光谱计算指数与小麦产量有较好的直线相关;地面光谱与卫星光谱指数(NVI),以及卫星光谱指数与小麦产量均具有较好的相关关系。 资料还证明了植冠红外温度与土壤水分即作物需水状况的相关性,以及气象卫星红外温度值与小麦产量的相关性。 利用上述遥感方法对冬小麦长势进行监测和估产,计算可靠,方法简便、快速,适宜于中小区域农业生产管理应用。

The progress in theoretical modeling of microwave remote sensing in recent years is briefly reviewed in this paper. As the models for the objects of remote sensing the theories and numerical approaches of electromagnetic scattering and thermal emission of random discrete scatterers, continuous random media, and randomly rough surface are discussed. The applications in both active and passive remote sensing of the earth terrain, vegetation canopy, soil, snow and ice, atmospheric cloud and rain, sea ice,...

The progress in theoretical modeling of microwave remote sensing in recent years is briefly reviewed in this paper. As the models for the objects of remote sensing the theories and numerical approaches of electromagnetic scattering and thermal emission of random discrete scatterers, continuous random media, and randomly rough surface are discussed. The applications in both active and passive remote sensing of the earth terrain, vegetation canopy, soil, snow and ice, atmospheric cloud and rain, sea ice, and sea surface driven by wind, etc. are also introduced. With the future development of the remote sensing technology, further efforts to develop more accurate models and quantitative mathematical physical approaches for remote sensing of the nature, and to develop numerical data analysis and parameter retrieval must be done. Some comments on the research progress in theoretical modeling of remote sensing are discussed, and several interesting and important topics for future research are pointed out.

本文简要地评论近年来微波遥感理论模式研究的进展,主要包括遥感对象理论模拟的随机离散散射粒子介质,连续随机介质,和随机粗糙表面的电磁散射和热辐射的理论,定量的数值求解方法,以及它们在地表植被、土壤、冰雪、大气云雨、海冰、风驱海面等主动和被动遥感中的应用。随着今后遥感技术的发展,要更为精细地模拟自然界中遥感对象及其环境,给出定量的数学物理学方法,进行定量的数据分析和遥感参数反演,还有大量的工作有待于研究。本文讨论了当今遥感理论模式研究中还存在的问题,提出了今后要予以研究的若干个方向性工作。

Most of the radiation measurements in tradiional remote sensing above natural surfaces such as soils or vegetation canopies, consisted of onl nadir reflectance factors. Although such nadir measurements have the advantage of simplicity, the amount of information that can be inferred about the surface is limited mainly to that obtainable from wavelength discrimination and sun incidence angle changes. The result ofrecent studies suggests that multiple view angle may fee used to great advantage in estimating the...

Most of the radiation measurements in tradiional remote sensing above natural surfaces such as soils or vegetation canopies, consisted of onl nadir reflectance factors. Although such nadir measurements have the advantage of simplicity, the amount of information that can be inferred about the surface is limited mainly to that obtainable from wavelength discrimination and sun incidence angle changes. The result ofrecent studies suggests that multiple view angle may fee used to great advantage in estimating the structure and characteristics of vegetation. This advantage of off-nadir measurements is only beginning to be understood.The major achievements made in this area have been summarized in this paper, and the vegetation canopy reflectance models are reviewed according to the following four categories: geometrical optical models, turbid medium models, hybrid models and computer simulation method. The geometrical models are those that based on geometrical optical theory and the description of canopy/crown contours by some common geometrical patterns like cylinders, spheres, cones and ellipsoids etc. These models are generally applicable to inhomogeneous plant canopies, especially to the sparse canopies. The turbid medium models are developed from the solution of the radiation transfer equation in turbid medium through specifying the canopy elements by small absorbing and scattering particles (plates, discs) with finite size and given spatial orientation and optical properties, and randomly distributed in horizontal layers. This kind of models are prevalently used for the dense, horizontally uniform plant stands (crops, grasses). The. hybrid models, which are deduced from the combination of the above two kind of models, can represent homogeneous as well in homogeneous canopies. Therefore, hybrid models are expected to have much wider ranges of application. The last kind-computer simulation method can realistically simulate the radiation interaction processes within canopies, and their dependence on various canopy structural parameters.For practical purposes, however, a certain balance between model precision and its computational efficiency is needed since precise models/methods are, as a rule, computationally tedious. It is suggested from the foregoing discussions that comprehensive analytical models may be most useful for extracting the vegetation structural parameters from the canopy reflectance spectrum. Based on the investigation of characteristics of scene directional reflectance spectrum, selection of wavebands being used and inversion of BRDF models, the main processes to quantitatively retrieve plant architectural parameters are deeply discussed. Finally, the approaches to bring the potential advantages of off-nadir observations into effect are described.

本文首先分析了传统的垂直测量方法在定量遥感中的局限性及多角度倾斜光谱在估算地物三维空间结构等方面的优越性。通过总结近年来国际上在植被双向反射领域所取得的主要成果,对计算植被双向反射系数的四类物理模型进行了简要评述。然后,从模式的选取、地物方向谱的结构及最佳的多角度资料的获取、观测波段的选择和模式的数学反演等方面出发,详细地讨论了利用上述理论模型实现植被结构参数的定量估算、再生资源的定量遥感的主要过程,以及使多角度遥感的潜在优势得以真正实现的可能途径。

 
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