刨花板中水分扩散系数和表面交换系数的分离方法

The Separation of Diffusion and Surface Emission Coefficients in Particleboard

水分扩散系数（Ｄ）和表面交换系数（Ｓ）是描述刨花板中水分迁移的重要参数、要更精确地模拟刨花板的水分迁移过程．精确分离Ｄ和Ｓ是关键。文中采用非线性单纯形法在单一吸附曲线的条件下。求出了最佳的Ｄ和Ｓ组对。通过用平方和的负均值法（ＮＭＳＳ）对此法与现行通用的两种方法的计算结果进行比较．结果此法大大提高了计算精度。

The diffusion coefficient D and surface emission coemcient s are key parameters to describe themoisture transfer process in particleboard. For a more accurate simulation of the moisture sorptionprocess in particleboard. the separation of the D and S is essential. A non-linear simplex technique wasdeveloped to obtain the optimum pair of the D and S in particleboard from a single sorption curve. Theresults show that this method is much more accurate than currently existing ones after comparing withthe experimental data by negative mean sum of squares method.