中文摘要：

对合轴分枝树木的形态进行三维可视化模拟,指出合轴分枝树木特征的描述指标,以槐树为例,将分枝分为主分枝与次分枝,分别对枝径、仰角、枝长等形态参数进行统计分析。结果表明：主枝枝径的平均值大于次枝,仰角和枝长的平均值小于次枝。主枝与次枝仰角均呈正态分布,集中在20°-40°之间,枝长主要分布在20-40 cm范围内。基于IFS算法,提出适于表达合轴分枝形态特点的数据结构,指出IFS入口参数对应于合轴分枝结构的实际意义,并对IFS分形算法进行合轴分枝树木建模的具体实现流程进行详细描述,最后实现合轴分枝树木三维可视化模型的构建。构建的树木模型符合合轴分枝形态特点,可以实现合轴分枝树木基本形态结构的表达。

英文摘要：

The three-dimensional visual model of sympodial branching trees was simulated. Pointed out index of sympodial branching trees, taking Sophora japonica as an example, by making branch fall into p secondary branch, did some statistical analysis of morphological parameters like branch diameter, elevation descriptive rimary and angle and branch length. Then reached the conclusion that the mean value Of primary branch diameter was greater than secondary branch diameter, while the elevation angle and branch length of primary branch was less than secondary branch. The distribution of elevation angle was ideally normal, and ranged from 20° to 40°, and branch length distributed in 20 -40 cm. Based on IFS algorithm, presented a data structure that was suitable for expressing sympodial branching morphological characteristics, and specifically pointed out the real meaning of IFS parameters corresponding to sympodial branching structure, stated the method of constructing sympodial branching trees model, and built the three-dimensional visual model of sympodial branching trees in the end. The constructed tree model was in line with the sympodial branching morphological characteristics, and indicated that it could achieve expressing the basic morphological structure of sympodial branching trees.