扩散方程;
The solution and aging behaviors of the composites are analyzed through effective diffusivity theoretical equation.
用有效扩散理论分析了颗粒增强复合材料的固溶时效特性。
Based on some reasonable simplifications on turbulent eddy diffusivity and mean velocity, an analytical solution to the charge transportation equation related to flow electrification is derived, by which an expression for the streaming current in a pipe is derived.
在合理简化紊流扩散系数和油流速度的基础上,推导出油内有关油流带电的电荷输运方程的解析解,并且根据该解析解导出了冲流电流计算公式。
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