摘要
运用残差图法和戈德菲尔特—夸检验方法检验出思茅松树高曲线方程中存在异方差现象。应用树高曲线方程本身为权函数对曲线方程进行加权,结果表明加权估计能够很好地消除思茅松树高曲线方程中的异方差问题,使曲线方程中的参数更加稳定,预估精度提高,应用性增强。
There exists a phenomenon of different variance in curve equation of tree height of Pinus kesiya var. Langbianensis examined by method of weighted residual. The curve equation of tree height itself as weighted function weights the equation. As a result, it shows that weighting estimate can be better enough to eliminate the different variance problem in the equation to stabilize the parameter further, to improve the pre-estimate precision and to enhance the possibility of application in the curve equation.
出处
《林业调查规划》
2007年第2期1-3,6,共4页
Forest Inventory and Planning
基金
云南省中青年学术和技术带头人后备人才(2004Py01-17)项目资助
云南省高等学校教学
科研带头人项目资助
关键词
思茅松
树高曲线方程
异方差
加权估计
Pinus kesiya var. Langbianensis
curve equation of height
different variance
weighting estimate
