A study of node selection of stem curves of <em>Cunninghamia lanceolata</em> in northern Fujian fitted with cubic spline functions

LIU jian; GUO Jian-hong; GUO Jin-hui; SHENG Shu-juan

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Volume 20 Issue 2

Jul. 2017

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Article Navigation > Journal of Zhejiang A&F University > 2003 > 20(2): 219-223

LIU jian, GUO Jian-hong, GUO Jin-hui, et al. A study of node selection of stem curves of Cunninghamia lanceolata in northern Fujian fitted with cubic spline functions[J]. Journal of Zhejiang A&F University, 2003, 20(2): 219-223.

Citation:

LIU jian, GUO Jian-hong, GUO Jin-hui, et al. A study of node selection of stem curves of Cunninghamia lanceolata in northern Fujian fitted with cubic spline functions[J]. Journal of Zhejiang A&F University, 2003, 20(2): 219-223.

A study of node selection of stem curves of Cunninghamia lanceolata in northern Fujian fitted with cubic spline functions

1.
Forestry College of Fujian Agriculture and Forestry University , Nanping 353001, Fujian , China

Funds:

福建省教育厅科学基金资助项目(JB01165)

Received Date: 2002-09-28
Rev Recd Date: 2003-02-23
Publish Date: 2003-06-20

Abstract

On the basis of statistic knowledge and computer technology and with correlative coefficients fo samples as main evaluating indexes , the data from stem analysis of Cunninghamin lanceolata in the north of Fujian Province are used to fit the stem curves with cubic spline functions .From the base of the tree , the nodes are expressed by percentage of the tree height .The nodes selected in this paper are as follows :0 , 10 %, 15 %～ 20 %, 50 %～ 60 %, 80 %～ 85 %and 100 %.Compared with other methods , the fitting effects of selected nodes are better than those of traditional nodes .The tested sample shows that the nodes selected in this paper can precisely fit the stem curves and embody the integrated shape of Cunninghamia lanceolata .[ Ch , 4 tab .8 ref .]
- spline functions,
- Cunninghamia lanceolata,
- stem curves,
- node selection

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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A study of node selection of stem curves of Cunninghamia lanceolata in northern Fujian fitted with cubic spline functions

1. Forestry College of Fujian Agriculture and Forestry University , Nanping 353001, Fujian , China

Funds:

福建省教育厅科学基金资助项目(JB01165)

Received Date: 2002-09-28
Rev Recd Date: 2003-02-23
Publish Date: 2003-06-20

Key words:

Abstract: On the basis of statistic knowledge and computer technology and with correlative coefficients fo samples as main evaluating indexes , the data from stem analysis of Cunninghamin lanceolata in the north of Fujian Province are used to fit the stem curves with cubic spline functions .From the base of the tree , the nodes are expressed by percentage of the tree height .The nodes selected in this paper are as follows :0 , 10 %, 15 %～ 20 %, 50 %～ 60 %, 80 %～ 85 %and 100 %.Compared with other methods , the fitting effects of selected nodes are better than those of traditional nodes .The tested sample shows that the nodes selected in this paper can precisely fit the stem curves and embody the integrated shape of Cunninghamia lanceolata .[ Ch , 4 tab .8 ref .]

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1. Forestry College of Fujian Agriculture and Forestry University , Nanping 353001, Fujian , China

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1. Forestry College of Fujian Agriculture and Forestry University , Nanping 353001, Fujian , China

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