论文部分内容阅读
根据９个省市对居住区大气中负离子浓度的１３６６次的测定资料，通过对数据的频数分配作曲线正态拟合，图解求得均数、标准差和标准误，单测估计８０％可信范围的下限（ｕ取０．８４２），得到标准建议值＞３２０／ｃｍ３。研究提出单极系数（ｑ）（ｎ＋ｎ－）几何均数为１．３１。评价指数（ｃｉ）以０．２６为宜。上述ｑ值和ｃｉ值可作为评价空气清洁度的参考指标之一。
According to the measured data of 1366 times of negative ion concentration in the atmosphere of the residential area in 9 provinces and cities, the mean, standard deviation and standard error are obtained by plotting the frequency distribution of the data for curve normalization. The single measurement is estimated to be 80% The lower limit of the letter range (u taken 0.842), the standard recommended value> 320 / cm3. It is proposed that the geometric mean of unipolar coefficient (q) (n + n-) is 1.31. Evaluation index (ci) 0.26 is appropriate. The q value and ci value above can be used as a reference index to evaluate the air cleanliness.