摘要
著名的Ｌｏｇｉｓｔｉｃ方程作为生物种群动态模型和生长曲线方程，在生态学和林学中得到了广泛应用；但它作为一种概率分布函数，却一直鲜为人知。林学上，对林分直径分布的研究，从６０年代以后，开始采用分布函数来描述林分的直径结构情况。如正态分布、对数正态分布、...
The possibility of applying the Logistic distribution: F(x) =11+exp -(x-a)b to quantify and predict diameter distributions for even aged pure stands was discussed from the distribution point of view. Results of analyses show that the relationship between parameter a,b and stand quadratic mean diameter Dg could be expressed as linear forms as following: a=a 0+a 1Dg,b=b 0+b 1Dg and then the predicting model for stand diameter distribution was constructed: F(x)=11+ exp -[x-(a 0+a 1Dg)]b 0+b 1Dg (note: a,b,a′,b′,a 0,a 1,b 0,b 1 are parameters, F(x) is the cumulative frequency corresponding to diameter x ).
出处
《林业科学研究》
CSCD
北大核心
1998年第5期537-541,共5页
Forest Research
基金
"八五"国家攻关专题
