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晴朗指数
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  clearness index
     Using polynomial model and interval model respectively,the measured data,which included monthly average solar diffuse radiation ( I d ),monthly average solar total radiation ( I ) and clearness index ( K t ) during the year of 1990-2000,was regressed and analyzed.
     采用多项式模型与区间模型 ,对我国不同纬度城市 1 990 - 2 0 0 0年期间的月平均太阳散射辐射量 (Id) ,月平均太阳总辐射量 (I) ,以及晴朗指数 (Kt)之间的关系进行了回归分析。
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  相似匹配句对
     Indices in Renal Failure
     尿指数
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     Service Quality Index
     服务质量指数
     The Sky of Credit:When Will It Be Fine?
     信用天空何时晴朗
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     A study on microwave attenuation of clear sky atmosphere
     晴朗天气大气对微波的衰减
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     Color and it′s distribution of clean summer sky on intermediate latitudes
     中纬度夏季晴朗天空的颜色及其分布
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  clearness index
Furthermore the roleof clearness index and air temperature in the estimation of the netradiative flux have each been examined.
      
We show that the experimental data can be described as a first-order autoregressive stochastic process independent of locality or season: the only climatic information needed is the monthly average of the clearness index.
      
Synthesis of time series for the clearness index using a reordering algorithm
      
Two insolation series, 4 and 8 years long, collected in different sites of the country, are used to contrast the behaviour of a statistical model for the clearness index, developed by the authors.
      
This model is based on the independence between the stationary and the sequential statistic of clearness index series.
      
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Using polynomial model and interval model respectively,the measured data,which included monthly average solar diffuse radiation ( I d ),monthly average solar total radiation ( I ) and clearness index ( K t ) during the year of 1990-2000,was regressed and analyzed.Results showed that the relationship between Id/I and K t can be used to estimate monthly average solar diffuse radiation in several areas in China.The value of K t usually is 0.3-0.8 for the cities within the latitude range of...

Using polynomial model and interval model respectively,the measured data,which included monthly average solar diffuse radiation ( I d ),monthly average solar total radiation ( I ) and clearness index ( K t ) during the year of 1990-2000,was regressed and analyzed.Results showed that the relationship between Id/I and K t can be used to estimate monthly average solar diffuse radiation in several areas in China.The value of K t usually is 0.3-0.8 for the cities within the latitude range of 30°-40°,while the value of K t can reach 0.8-1.0 for the cities in higher or lower latitude.The I d/I-K t curve can provide the information on air quality of a city to some extent.Generally,under the same other conditions,the more good air quality of a city is,the more obvious the linearity of regression curve is.

采用多项式模型与区间模型 ,对我国不同纬度城市 1 990 - 2 0 0 0年期间的月平均太阳散射辐射量 (Id) ,月平均太阳总辐射量 (I) ,以及晴朗指数 (Kt)之间的关系进行了回归分析。研究结果表明 ,在太阳能与建筑结合工程设计中 ,利用Id I与Kt 的函数关系 ,可以对我国不同地区月平均太阳散射辐射量数据进行初步的估算 ;我国 30°- 40°纬度范围内城市的Kt在 0 .3~ 0 .8之间 ,对于较高或较低纬度范围内部分城市的Kt 可以达到 0 .8- 1 .0 ;Id I-Kt 系曲线可以在一定程度上反映城市的空气质量情况的优劣 ,通常在其它因素相同的条件下 ,城市空气质量越好 ,同归曲线越趋近于线性

 
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