[1]周元满,谢正生,刘素青,等.短轮伐期桉树林分树冠生长的阶跃函数模型[J].南京林业大学学报(自然科学版),2006,30(02):059-62.[doi:10.3969/j.jssn.1000-2006.2006.02.014]
 ZHOU Yuan-man,XIE Zheng-sheng,LIU Su-qing,et al.The Unit Step Function Model for Crown Diameter of Short Rotation Eucalyptus[J].Journal of Nanjing Forestry University(Natural Science Edition),2006,30(02):059-62.[doi:10.3969/j.jssn.1000-2006.2006.02.014]
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短轮伐期桉树林分树冠生长的阶跃函数模型
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
30
期数:
2006年02期
页码:
059-62
栏目:
研究论文
出版日期:
2006-02-20

文章信息/Info

Title:
The Unit Step Function Model for Crown Diameter of Short Rotation Eucalyptus
文章编号:
1000-2006(2006)02-0059-04
作者:
周元满1谢正生2刘素青1刘新田1
1. 广东海洋大学农学院, 广东 湛江 524088; 2. 华南农业大学林学院, 广东 广州 510642
Author(s):
ZHOU Yuan-man1 XIE Zheng-sheng2 LIU Su-qing1 LIU Xin-tian1
1. Agronomy College Guangdong Ocean University, Zhanjiang 524088, China; 2. Forest College South China Agriculture University, Guangzhou, 510642, China
关键词:
桉树 阶跃函数 冠幅 生长模型 短轮伐期
Keywords:
Eucalyptus Unit step function Crown Growth curve Short rotation
分类号:
S753.5
DOI:
10.3969/j.jssn.1000-2006.2006.02.014
文献标志码:
A
摘要:
<正>以碱木质素为原料,三氟化硼乙醚为催化剂,用环氧丙烷对碱木质素进行丙氧基化改性后,与环氧氯丙烷反应合成木质素基环氧树脂。以合成的木质素基环氧树脂为基体,有机化蒙脱土为增强材料,采用插层复合法制备了木质素基复合材料。木质素基环氧树脂与有机蒙脱土有很好的相容性,用T31和甲基六氢苯酐作固化剂时,木质素基环氧树脂/有机化蒙脱土(OMMT)复合材料的拉伸强度和冲击强度均高于未加蒙脱土的木质素基环氧树脂。极少量的有机蒙脱土的加入可同时提高木质素基环氧树脂的韧性和强度。
Abstract:
According to the crown growth characteristics in industrial Eucalyptus stand of short rotation, the unit step function model was put forward for the process with changing point of short rotation Eucalyptus clones U6 based on the survey practical stands. The biology signification of the parameter of the model was analyzed by solving the coefficient. The analyzable conclusions of the regression model between crown diameter and age show that the utility of unit step function model in the crown growth process with the changing point is better than the usual regression methods, and the unit step function model can solve discontinuance on the changing point. The optimizing model results show that the power model is the best one in all models tested.

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更新日期/Last Update: 2013-05-20