摘要
用主成分分析法建立的理想削度函数式 ,计算 1 45株长白落叶松的树干材积 ,其材积总和精度高于实验形数法计算的精度 ;本公式计算的单株材积误差率为 - 1 1 .63%～ 1 6.3% ,而用实验形数法计算的单株材积误差率为 - 1 2 .69%～ 1 7.85 % .
The article established a ideal taper functicn formula by using the method of the principal component analy sis.And estimate 145 Larix by the formula.The accuracy of total volume heigher than using the experirmental form factor method.The error rate of the monomer volume using this formula is -1.63%～16.3%.And using the experimental form factor method is -12.69%～17.85%.
出处
《高师理科学刊》
2003年第1期57-59,共3页
Journal of Science of Teachers＇College and University
关键词
主成分分析
理想列度函数式
实验形数
the principal component analysis
ideal taper function formula
experimental form factor
