中文摘要：

在总结国内外木材年轮细胞几何尺寸计算理论的基础上，研究木材年轮间相关参数与细胞断面形状数学关系的基础理论。通过细胞模型的几何尺寸定量计算细胞与年轮的相关参数，定性地解释木材生长变化的年轮间细胞变化的几何特征。由于绝大多数木材年轮的相关参数随细胞壁尺寸变化而改变，在微观观察年轮间的细胞几何尺寸变化可以定量地描述木材材性的变化。在宏观分析同一树种年轮的不同变化时，采用细胞尺寸差异比较．根据细胞模型形状计算出各树种和材种间尺寸和密度的不同，根据细胞密度显著的变化从微观解释木材强度的变化，将使我们从微观理论的高度来认识木材宏观性质的变化，为木材年轮细胞描述理论开创新的研究领域。

英文摘要：

The basic theory of mathematical relationships between wood ring parameters and cell form of fracture was studied by summarizing the computational theory for geometrical dimension of wood ceils at home and abroad. The geometrical feature for wood performance change of wood cells among annual rings could be expressed qualitatively by means of quantitatively calculating the correlation parameters for cells and annual rings with geometrical dimension of cell model. The geometrical dimension change of cells among annual rings by microcosmic observation can explain the change in wood properties due to the fact that most correlative parameters for wood annual rings vary with the change of cell wall sizes. The variations of annual rings for the same tree species can be analysed macroscopically： first compare the difference in cell size, then calculate the differences in cell size and cell density of different tree species by cell model, and then the variation of wood intensity can be explained according to the significant change of cell density.