Relationship between daily diffuse irradiation and daily total irradiation is analyzed, based on data form Beijing and Chengdu. Polynomial models for Beijing and Chengdu are established to estimate K d form K t .

• 文章根据北京和成都两地的实测数据 ,分析了日散射与日总射的关系 ,分别建立了两地散射系数Kd 与总辐射系数Kt 的多项式拟合模型。