在评价分析森林资源结构的工作中,通常采用定性的办法,即用文字描述辅以图表分析。这种方法很难给人以直观的认识,尤其是对两个基本单位进行比较性评价时,用定性分析的办法就难以得出满意的结果,例如,我们在实际工作中常常使用诸如:“两头大中间小”、“立木年龄结构失调”等等,这样的词句只能给人以一种抽象的认识。如果能将评价 In the process of evaluating and analyzing the structure of forest resources, a qualitative method is usually adopted, that is, the text description supplemented by chart analysis. This method is hard to give an intuitive understanding. In particular, when conducting a comparative evaluation of two basic units, it is difficult to obtain satisfactory results by means of qualitative analysis. For example, we often use words such as “ Two large middle small ”,“ Li Mu age structure disorders ”, etc., such words can only give an abstract understanding. If you can evaluate