差分逼近 meaning in Chinese

finite difference approximation

The transient mathematical equations are addressed for the coupled heat and moisture transfer by taking account of moisture accumulation procedure . an analytical method by means of the transfer function is proposed to predict the transient distributions of temperature and moisture content at different interfaces in walls . a numerical analysis approach based on an efficient finite - difference method is developed to deal with the procedure of coupled heat and moisture transfer in a multilayer wall with nonlinear boundary conditions considered
建立了考虑湿积累过程的瞬态热湿耦合模型，在方程中引入了湿积累项；发展了一种传递函数解析方法进行墙体内不同剖面处温度和含湿量的动态预测；首次提出了一种基于有效有限差分法预测非线性边界条件下多层多孔结构内的传热传湿过程的数值分析方法，求解过程中考虑了瞬态边界条件，从而避免了通常处理中由于边界条件设定为常数而给计算带来的误差，对于多层结构每一层物性参数的非连续性，则采用了有效的有限差分逼近处理。