偏度和峰度在粒子谱研究中的应用  

The application of skewness and kurtosis to the studies on particle distribution

作　　者：刘延刚 

机构地区：[1]气象科学研究院

出　　处：《气象》1991年第1期9-15,共7页Meteorological Monthly

摘　　要：本年通过引进两个统计学参数:偏度S和峰度K,提出了<1>实际谱是否可用Γ-谱近似的定量化验证方法;<2>在实际谱可用Γ-谱近似的条件下,一个定量分析实际谱偏离指数谱N(D)=N_0exp(-λD)的指标——偏离系数;<3>依据偏离系数的值,对粒子谱型的一种分类方法。Two statistical parameters, skewness and kurtosis are introduced to investigate particle distribution. A quantitative method is formulated to testify the fitting goodness to Γ-spectra. A quantitative criterion named 'Deviation Cofficient' is presented to express the natural deviation from exponential spectra under the Γ-spectra assumption and according to the criterion a classification is developped.

关 键 词：降水 粒子谱 偏度 峰度 研究 

分 类 号：P426.6[天文地球—大气科学及气象学]