first, the efficiency of light wells alone was computed using the cie standard overcast sky as a function of light-well dimensions and coefficients of reflection of the sides.
首先,在cie标準的全云天环境下针对单个采光井按照不同的尺寸和参数进行反射模拟以及漫射模拟;
but thick clouds and an overcast sky obscured the view at the indian village of taregna, 「epicentre」 of the eclipse, says our correspondent in the area.
above is a still from video taken last october and uploaded onto youtube of a giant halo in an overcast sky over moscow.
上图也取自在年10月在莫斯科的一个阴天里所拍摄并上传到视频网络的视频中的一个巨大光环。
the overcast sky shrouded the garden in a twilight gloom, and indoors all the lights were on.
天色阴暗到几乎像黄昏。满屋子的电灯全开亮了。
tens of thousands more congregated in 「fan zones」 around the british capital to watch the festivities on big screens, their enthusiasm hardly diminished by overcast sky and sporadic showers.
the louvers may be adjusted so that they reject summer radiation, admit overcast sky luminance or act as light shelves, depending on the nature of day and the requirements of each storey.