收集闽北杉木解析木材料,运用统计学的知识并结合计算机技术,用三次样条函数拟合杉木干形曲线,以样本相关系数均值为主要评价指标,筛选出拟合杉木干形曲线的三次样条函数的节点,即从树干基部算起,依次为树高的0,10%,15%～20%,50%～60%,80%～85%和100%处。经3处方案的拟合比较和实例验证,结果表明所选节点的似合效果明显优于用传统经验节点的拟合效果;所选节点整体拟合精度高,适应性好,能够全面确切反映杉木完整形状。表4参8 Collecting fir wood from the North Fujian Province, applying statistical knowledge and computer technology, fitting the dry spline curve of Chinese fir with the cubic spline function and taking the average value of the sample correlation coefficient as the main evaluation index, screened three times The nodes of the spline function, ie, from the base of the trunk, are 0,10%, 15% -20%, 50% -60%, 80% -85% and 100% of the tree height, respectively. The results show that the fitting effect of the selected node is better than that of the traditional empirical node. The fitting accuracy and adaptability of the selected node are good, which can fully and accurately reflect the Chinese fir Complete shape Table 4 Reference 8