Position: Home > Articles > Research on Collection of Sample for Modeling of Commonly Used Two-Way Tree Volume Model
Central South Forest Inventory and Planning
2001,20
(1)
1-9
通用性二元立木材积模型的建模样本研究
作 者：
贺东北;曾伟生;骆期邦
单 位：
国家林业局中南院
关键词：
通用性二元立木材积模型;样本组织;样本结构;样本量
摘 要：
研究提出了组织通用性二元立木材积模型建模样本的理论和方法。通过 1 1个方案的对比试验表明 ,根据建模单元内可能出现的径阶分布范围 ,选取不少于 5个取样径阶 (其中最小和最大径阶必取 ) ,然后在每个取样径阶范围中 ,按高径比大、中、小取 30株样木 ,总样本量不少于 1 5 0株所构成的建模样本 ,是保证模型具有广泛适用性的高效样本 ,从而可以避免以往取样工作中的盲目性 ,大量节约不必要的无效取样量。这一理论和方法 ,对其它以预测为目的的通用性林业数表模型的建模样本组织有普遍意义
译 名：
Research on Collection of Sample for Modeling of Commonly Used Two-Way Tree Volume Model
作 者：
He Dong-bei,Zeng Wei-sheng,Luo Qi-bang (Central South Institute of SFA,Changsha 410014, China)
关键词：
commonly used two-way tree volume model;collection of sample;structure of sample;amount of sample
摘 要：
In this paper,the theory and method for collection of sample to be used for modeling of commonly used two-way tree volume model are presented.Based on comparison of 11 options,a best way for collection of sample is as follows:According to the diameter distribution range of the modeling unit possibly appeared in practice,not less than 5 diameter classes are selected at first, where the smallest and largeter classes must be included; Secondly, between the range of each selected diameter class, 30 sample trees are selected in accordance with large, middle, and small values of “ratio of height to diameter”.Then, the modeling Sample is kmly 150 Sample trees, but it is very effective. Thus,the blindess before in Collection of sample can be avoidable,and amount of ineffective sample trees can be reduced or avered. As for other commonly used mathematical models in forestry to be used for prediction or projection, the theory and method for collection of modeling sample are of universal significance.
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