本文主要从调查方法选择和群落结构特征参数计算两方面阐述了城市街道绿化树种结构量化研究方法。
The research method of quantifying the structure of street tree populations was mainly described from the survey method selection and the calculation of the parameters of street tree populations.
针对两种非线性温度梯度模式及具有不同顶、底板厚度的一般箱梁桥，推导了等效线性化后的特征参数计算公式。
The formula of characteristic coefficient for equivalent linearization is derived for two kinds of thermal gradient modes and general box girders with different depths of top and bottom flanges.
并利用这两种算法对镀层材料腐蚀特征信息进行识别，计算镀层材料的图像腐蚀特征参数。
These arithmetics are applied to recognise information of erode features in coating material and compute erode feature parameter of coating material.
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