由于氡气浓度随季节、一天内不同时间和通风状况而变化,个人受氡及其子体的照射量一直很难估计。不同的人群居住时间的变化,更增加了照射量的易变性。本模型试图根据实际测定结果,将这些变化加以平均,以便能对照射量作出实际估计。限定了以下一些变量。(1)不同的人群组,(2)房屋的地下室和其它层,(3)一年的四季,(4)在室内的活 Because radon concentration varies with season, time of day and ventilation, it is difficult to estimate the exposure of individuals to radon and its daughters. Changes in the living time of different groups, but also increased the volatility of exposure. The model attempts to average these changes based on the actual measurement results so that a realistic estimation of the exposure can be made. The following variables are defined. (1) different groups of people, (2) basements and other floors of houses, (3) four seasons of the year, (4) live indoors