日照百分率

混合式覆盖开关日照百分率研究

The mixed coverage switch the formula of sunshine percentage

日照百分率的小网格分析方法

A small grids method of calculating sunshine percentage

在通过对总辐射和日照百分率的正态分布检验以及相关性检验的前提下，以日照百分率资料为参考，采用potter法对70个辐射站进行总辐射资料的均一性检验。

The error range of calculating solar radiation with sunshine data is obtained . The homogeneity test is carried out using 70 monthly total solar radiation series over China with potter method .

黄河流域近40年日照百分率的气候变化特征

Variation of Sunshine Percentage for the Last 40 Years in the Yellow River Basin

日照百分率研究

The formula of sunshine percentage

结果表明，就整个流域平均而言，日照百分率呈明显下降趋势，黄河流域年平均日照百分率在20世纪90年代较60年代下降了2.49%；

The result shows that the sunshine percentage in the Yellow River basin has steadily decreased on average , especially in summer and winter .

3月～5月生长季早期树木缓慢生长，温度、降水量、日照百分率均与木材物理和解剖特征有显著性相关。

The early growing season from March to May the trees growth slow , and the temperature , precipitation , the sunshine percentage have significant relations to the wood anatomical characteristics .

根据日照百分率日变程曲线的变化规律，对于日照百分率大于70%的地区，建议了一种新的日照百分率计算式。

According to the daily change law from curves for percentage insolation , this paper presents a new formula of the average insolation in the zones where the insolation is more than 70 % .

由此推导出太湖无锡地区太阳总辐射的气候学计算公式，并利用无锡站日照百分率资料求算出近40年到达地面的太阳实际总辐射。

The climatological calculation formula , which is suitable for Wuxi region , is brought forward . The global radiation reaching the surface is gained by using the formula and relative sunshine data at Wuxi station in recent 40 years .

6月～8月生长季早期树木生长旺盛，温度与木材物理和解剖特征均有显著性相关，降水量与木材物理特征有显著相关性，日照百分率与木材解剖特征有显著相关性。

From June to August the trees grew fast , the temperature has relation to the physical and anatomical characteristics significantly , the precipitation has remarkable relation to wood physical characteristics , the sunshine percentage has remarkable relation to wood anatomical characteristics .

根据广州、汕头1961年～2002年历年各月的总辐射和日照百分率，采用最小二乘法拟合出公式中各月的经验系数，并计算了全省各地的月太阳总辐射。

In accordance with the monthly global solar radiation and percentage of sunshine from 1961 to 2002 in Guangzhou and Shantou , experiential coefficients of each month in formula were fitted using least squares methods and monthly global solar radiations in all parts of the province were calculated .

本文利用1951-2000年西安市气候观测数据，分析了过去50年来西安市气温、降水、相对湿度、日照百分率、晴空指数以及直接散射辐射比等参数的多年和季节变化趋势。

By using climate observation data of Xi'an during 1951 to 2000 , annual and seasonal variation trends of temperature , precipitation , relative humidity , sunshine percentage , clearness index and ratio of solar radiation to diffuse radiation of Xi'an during the past 50 years were analyzed .

日照时数与日照百分率变化趋势不完全相同；

The monthly variation tendency of sunshine hours and relative sunshine is different ;

主要研究结论如下：（1）1951-2008年，年和生长季的日照时数及日照百分率均呈减少趋势。

The main research achievements are as follows : There was a decreasing trend of the sunshine duration and sunshine percentage of year and growing season from 1951 to 2008 .