风向频率是分8个或16个罗盘方位观测,累计某一时期内(一季、一年或多年)各个方位风向的次数,并以各个风向发生的次数占该时期内各方位总次数的百分比来表示。
结果表明,在计算联合频率中应用风向和风速概率矩阵比应用频率矩阵更准确、可靠。
The results indicate that it is more accurate to estimate joint frequency by using probability matrixes than frequency matrixes.
利用线源长期平均浓度模式对面源的积分得到了一个用风向、风速和稳定度的联合频率计算大气面源长期平均浓度的新算法。
A new method of calculating long term mean concentration of air pollutant from area source is proposed by integrating the line source long term mean concentration model.
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