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作 者 ：曾伟生

期 刊 ：林业科学 1996年 32卷 3期 页码：269-273

关键词：密度指数；数学模型；对偶回归；多价回归；一致估计；

Keywords:SDI, Mathematical model, Dual regression, Multistage regression, Consistent estimation,

摘 要 ：从“密度指数与林分测树因子数学模型”所存在的问题出发,对林分密度指数与断面积,平均直径和株数之间的关系模型从数学上进行了推导,提出了正确的参数估计方法,并就拟合数学模型应注意的两个问题,即互为自(因)变量问题与参数一致性估计问题进行了综合讨论。

Abstract:To counter the problems to "the mathematical models of density index and stand characteristics ", the models about stand density index (SDI), hasal area, mean diameter and stems are presented mathematically in this paper, and the parameter estimation procedure is also provided. Further more, it is pointed out that we should pay move attention to dual regression and consistent estimation for fitting mathematical models.

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