| 林木直径分布预测动态模型的研究 |
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| 引用本文： | 潘存德.林木直径分布预测动态模型的研究[J].林业科学,1990,26(5):470-474. |
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| 作者姓名： | 潘存德 |
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| 作者单位： | 新疆八一农学院林学系 |
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| 摘 要： | 林木直径分布及其变化规律的研究,至今并未很好解决。本文对单一林分总体提出一套对直径分布一致性和非一致性林分具有兼容性的模型,将有助问题的解决。一、分布预测模型的构造 (一)分布函数的选择和参数估计 1.分布函数的选择本文采用K.Pearson分布系来描述直径分布,所选6种分布函数详见表1。其中,x是随机变量,a、b、c、p和q是参数。且
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| 关 键 词： | 林木 直径分布 动态模型 林分 |
A STUDY ON THE DYNAMIC MODELS FOR PREDICTING DIAMETER DISTRIBUTION OF FOREST TREE |
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| Pan Cunde.A STUDY ON THE DYNAMIC MODELS FOR PREDICTING DIAMETER DISTRIBUTION OF FOREST TREE[J].Scientia Silvae Sinicae,1990,26(5):470-474. |
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| Authors: | Pan Cunde |
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| Institution: | Xingjiang Auguest 1st Agricultural College |
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| Abstract: | Family of Pearson type was selected as the function of diameter distribution in this paper, and the moment of first order 4 about the orgin was used as a link with distribution function. By means of analytical technology of time series, it recommended a series of dynamic models to express and predict future diameter distribution of existing stand. The practical data from the man made Populus even-aged stand were used to examine the effects of these models and the result was satisfactory. |
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| Keywords: | Family of Pearson type Method of moments Time series analysis Moment about the origin Diameter distribution |
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