There has been some suspicion Beijing cooked the books by prohibiting researchers from taking pollution readings at the site of the games and releasing only an official 'daily air pollution index.' The researchers tried to compensate for that by examining pollution readings taken by National Aeronautics and Space Administration satellites which crossed China twice a day. The NASA readings generally confirmed what the Chinese government was reporting.
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Five air models (or methods) used for daily urban air pollution index prediction and its forecasting precision were discussed. The result is that based on the analysis of local meteo...
对用于城市空气污染物指数日常预报服务的五种预测模式和方法及其精度进行了讨论。
Air pollution index (API) was developed by USEPA in 1970s which was used for the daily air quality report and easy for the public to understand.
空气污染指数(API)是美国环保署于70年代研究开发的一种用于表示每日空气质量状况，并易于为大众理解的报告方法。
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