The grey system assessment method, air pollution integrated index are applied to evaluate the atmosphere, surface water, noise environmental quality of valley cities in western China.
本文首先采用灰色系统评价方法、空气污染综合指数等方法对中国西部河谷型城市大气、地表水、噪声环境质量进行了客观评价。
A grey miasma, neither cloud nor mist low in the sky and the atmosphere was stifling.
一些似云非云，似雾非雾的灰气低低的浮在空中，使人觉得憋气。
Improve the season tendency model by using the grey system modern and predicate the future yearly figure of the dioxide of the atmosphere about the system environment.
利用灰色系统模型改进季节性趋向模型，预测城市环境空气中二氧化硫的未来年度值。
Improve the season tendency model by using the grey system modern and predicate the future yearly figure of the dioxide of the atmosphere about the system environment.
利用灰色系统模型改进季节性趋向模型，预测城市环境空气中二氧化硫的未来年度值。
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