利用相对误差最小二乘法估计材积方程参数  

Parameters Estimating of Volume Equations by Least Method Squares of Relative Error

作　　者：钟义山[1,2] 钟云智 

机构地区：[1]西北林学院资源学院 [2]西北林学院图书馆

出　　处：《西北林学院学报》1999年第1期84-87,共4页Journal of Northwest Forestry University

摘　　要：提出了利用相对误差最小二乘法估计材积方程参数的方法，讨论了该方法与加权最小二乘法估计材积方程参数的某些一致性。该方法在一定程度上克服了材积方程模型的异方差性，使建立的材积方程较大地降低了平均相对预测误差。A method of estimating the parameters of volume equations by least square method of relative error was developed. Some indentities between the method and weighted least square method were discussed. This method surmountes the problem of non homogeneity of the volume variance in certain extent.The volume equations constructed by the method greatly reduce average relative prediction error, improve the accuracy of volume equations.

关 键 词：相对误差 最小二乘法 材积方程 加权最小二乘法 

分 类 号：S711[农业科学—林学]