| 树木生长方程参数估计方法的比较研究 |
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| 引用本文： | 朱敏,冯仲科. 树木生长方程参数估计方法的比较研究[J]. 北京林业大学学报, 2007, 0(Z2) |
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| 作者姓名： | 朱敏 冯仲科 |
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| 作者单位： | 北京林业大学测绘与3S技术中心，北京林业大学测绘与3S技术中心 中国地震局工程力学研究所 |
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| 基金项目： | 北京市自然科学基金重点项目(4041002) |
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| 摘 要： | 在对林业生产进行管理决策时,正确地分析林木的生长规律具有重要意义.该文以树木生长的理论方程为基础,以北京油松人工林解析木数据等为基础资料,通过具体计算及分析比较,对模型参数估计中的有关问题进行研究.在对树木生长方程的参数进行估计时,常需要利用非线性回归方程,通过一些近似解法进行参数识别.该文利用树木的实际测量数据,对不同的解法进行了分析比较,认为每种方法都存在不足.只有根据各自的适用范围,将这两种方法结合,形成综合求解方法,才能较好地对树木生长方程的参数进行估计.
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| 关 键 词： | 树木生长方程 参数估计 纯比例增长率 固有增长率 非线性最小二乘法 |
Comparison of evaluation methods of parameters in wood growth equation. |
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| ZHU Min. Comparison of evaluation methods of parameters in wood growth equation.[J]. Journal of Beijing Forestry University, 2007, 0(Z2) |
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| Authors: | ZHU Min |
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| Abstract: | It is very important to study the forest growth for forestry management.Based on the theoretical equation of forest growth,some questions concerning the evaluation of parameters in wood growth model were studied by calculating and analyzing the data of Pinus tabulaeformis in Beijing.Nonlinear regression equations are always applied to evaluate parameters. By mathematical transformation,some nonlinear regression can be transformed to line regression,the others must be solved by nonlinear regression methods.Different methods to evaluate parameters of wood growth were analyzed and compared by the calculation with measured forest growth data.They both have shortages and must be combined reasonably for regression analysis to obtain parameters. |
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| Keywords: | wood growth equation parameter evaluation simple rate of proportion growth inherent growth rate nonlinear least-squares method |
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