Establishes a dynamic lumped parameter model for air cooled heat pump under frosting condition. Divides frosting course into accumulation of density and frost thickness.
建立了结霜工况下空气源热泵集中动态参数模型，将结霜过程分解成密度项的累计和霜层厚度项的累计。
By simplifying the equation of air pollutant diffusing, the mathematic form of dynamic statistics model of air pollutant forecast has been worked out.
从空气污染扩散方程出发，经过简化推导，得出污染预报动力统计模型的数学形式。
The air defense troops assignments uses dynamic programming method to establish the numeric model.
防空兵群兵力分配，运用动态规划方法建立数学模型。
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