北京林业大学学报2001，Vol.23Issue(3)：101-102,2.
论林木直径整化与材积误差
Study on the stand volume error from the diameter rounding
摘要
Abstract
As a basic theory in forest mensuration,the stand volume error from the diameter rounding was studied in this paper,and profound new ideas as following,①comparing the stand survey factors from the diameter rounding to those from the diameter without rounding,there is no error in the arithmetic average diameter in general,but positive errors in the stand square average diameter and stand volume,and the theoretical error value of stand volume is PV＝(a2/12d2)×100；②for the continuous variables following the most distributions such as normal distribution or approximate normal distribution,with its frequency function as discrete function,the variance(σ2g)from grouping data can be corrected to improve the precision.关键词
林木直径整化/林分材积误差/林分平方平均直径/林分材积分类
农业科技引用本文复制引用
宋新民,李金良..论林木直径整化与材积误差[J].北京林业大学学报,2001,23(3):101-102,2.
