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。
Heat transfer equation is a kind of basic mathematical-physical equation. The thermal diffusivity is an important thermal physical parameter for soil.
传热方程是一类常见的基本数学物理方程，热导率是土体重要的热物理参数。
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