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black模型
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  black model
     Two common correcting models, Hopfield model and Black model, are introduced.
     介绍了2种常见的校正模型,Hopfield模型和Black模型
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  “black模型”译为未确定词的双语例句
     The meteorological data and elevation are used to calculate IWV by Hopfield and Saastamoinen ZWD model, and the result is compared with corresponding IWV calculated using GPS data. The result shows that the accuracy of IWV calculated by Hopfield and Saastamoinen ZWD model is about 20%~30%. IWV calculated by Hopfield ZWD model and IWV calculated by Saastamoinen ZWD model are different, the difference is affected by elevation.
     发现在拉萨站,Hopfield模型与其它两种模型计算的IWV出现了系统性的偏移现象,通过与拉萨站上的探空数据的比较证实Saastamoinen和Black模型计算的IWV比较合理。
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     Trynor-Black model is applied to construct active portfolio. Compared with the norm, the average performance of 33 funds in China stock market, the performance of portfolio is evaluated by the way of the cross-sectional analysis.
     利用Trynor-Black模型,构造积极组合,跟踪基金的业绩表现、采用横截面分析的方法,以深沪基金管理绩效为标准,检验完全积极投资组合模式基金绩效的高低的稳定性。
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  相似匹配句对
     ⅱ, Black---Sholes pricing model.
     Black-Scholes定价模型
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     model.
     模型
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     Black, M.Scholes and R.
     Black,M.
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     Obviously, EVA model turns out a scientific appraisals to motivate the managers.
     该模型为:
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     Black,M.
     Black,M.
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  black model
The black model of medium size (both height and width) elicited higher rates of fixation, peering, and strike responses than the large, small, or gray model.
      
Black model (1976) becomes a special case of this paper.
      
The black model body was used only to show the theoretical ideal case.
      


Determination of dry zenith delay, DZD, is important for separating water vapor content from GPS solutions in GPS meteorology. The existing models usually cannot meet this need with high accuracy. In this study, we calibrated three popular DZD models namely Saastamoinen, Hopfield and Black models for local GPS meteorology application using radiosonde data. We test the models by comparing the predicted delays from the calibrated models against the observed delays from radiosonde data that are not included in...

Determination of dry zenith delay, DZD, is important for separating water vapor content from GPS solutions in GPS meteorology. The existing models usually cannot meet this need with high accuracy. In this study, we calibrated three popular DZD models namely Saastamoinen, Hopfield and Black models for local GPS meteorology application using radiosonde data. We test the models by comparing the predicted delays from the calibrated models against the observed delays from radiosonde data that are not included in the solution. Calibrated models on the average show 98 pc improvement over the uncalibrated model predictions over one month period. A comparison of the DZDs calculated from GPS measurements over a month period with calibrated and uncalibrated model prediction shows, on the average, 96 pc better agreement for the calibrated models.

确定大气中可降水分的含量是 GPS气象学的目的之一。可降水分含量对应于 GPS信号中湿分量延时。现有高精度 GPS软件包只能提供天顶方向的对流层延时 ,但是 ,对流层延时由干分量和湿分量延时组成。因此 ,精确确定干分量延时 ,是分离湿分量延时的关键 ,也是GPS气象学中必不可少的工作。  现有 3种经验模型计算垂直干分量延时 ,即萨氏 (Saastamoinen)模型 ,霍氏 (Hopfield)模型和布兰克 (Black)模型。它们的具体形式分别为 :dz S=0 .2 2 77PF(φ,H )F(φ,H )≡ 1 -0 .0 0 2 6cos(2φ) -0 .0 0 0 2 8H           (1 )dz H=1 .5 5 2 (h-H ) PTh≡ 40 .0 82 + 0 .1 4898(T-2 73 .1 6)               (2 )dz B=0 .2 3 43 (T-4 .1 2 ) PT (3 )式中 ,垂直干分量延时的单位是 cm;P为气压 ,T为绝对温度 ,H为测站海拔高 ,φ是测站纬度 ;下标 S,H和 B分别代表萨氏 ,霍氏和布兰克模型。现有文献简单认为以上 3种模...

确定大气中可降水分的含量是 GPS气象学的目的之一。可降水分含量对应于 GPS信号中湿分量延时。现有高精度 GPS软件包只能提供天顶方向的对流层延时 ,但是 ,对流层延时由干分量和湿分量延时组成。因此 ,精确确定干分量延时 ,是分离湿分量延时的关键 ,也是GPS气象学中必不可少的工作。  现有 3种经验模型计算垂直干分量延时 ,即萨氏 (Saastamoinen)模型 ,霍氏 (Hopfield)模型和布兰克 (Black)模型。它们的具体形式分别为 :dz S=0 .2 2 77PF(φ,H )F(φ,H )≡ 1 -0 .0 0 2 6cos(2φ) -0 .0 0 0 2 8H           (1 )dz H=1 .5 5 2 (h-H ) PTh≡ 40 .0 82 + 0 .1 4898(T-2 73 .1 6)               (2 )dz B=0 .2 3 43 (T-4 .1 2 ) PT (3 )式中 ,垂直干分量延时的单位是 cm;P为气压 ,T为绝对温度 ,H为测站海拔高 ,φ是测站纬度 ;下标 S,H和 B分别代表萨氏 ,霍氏和布兰克模型。现有文献简单认为以上 3种模型没有误差[1,12 ] ,或几毫米的误差[2 ,4~ 6 ,10 ] ,没有详细讨论这些模型的精度。 3种模型中 ,垂直干分量延时是气压和温度观测值的函数 ,式 (1 )~式 (3 )分别对气压和温度微分后 ,并保证其系数达到最大值 ,可以得到垂直干分量延时与气压及温度的微分关系。由此得到 :如果?

The principle that GPS signals propagation delayed in troposphere is reviewed in the paper. Two common correcting models, Hopfield model and Black model, are introduced. Then, the troposphere pseudo-range remaining error (TDRE) of differential GPS (DGPS) is defined, its mathematical model is constructed, and the computer simulation of TDRE of DGPS is carried out. The simulation results indicate that the pseudo-range remaining errors will be increased with the distance between base-station and GPS user and...

The principle that GPS signals propagation delayed in troposphere is reviewed in the paper. Two common correcting models, Hopfield model and Black model, are introduced. Then, the troposphere pseudo-range remaining error (TDRE) of differential GPS (DGPS) is defined, its mathematical model is constructed, and the computer simulation of TDRE of DGPS is carried out. The simulation results indicate that the pseudo-range remaining errors will be increased with the distance between base-station and GPS user and in the case of low satellite elevation.

简单回顾了对流层中GPS信号传播延迟的原理。介绍了2种常见的校正模型,Hopfield模型和Black模型。定义了差分GPS(DGPS)的对流层伪距残差的概念,并建立了数学模型。用计算机对DGPS的对流层伪距残差进行仿真。仿真结果表明用户和基准台之间距离增大和低卫星仰角都将使伪距残差增大,气象因素和高程对伪距残差也有影响。

 
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