根据实际情况，通过推导，得出了低热值油煤气掺混lpg的效率计算公式。
According to actual condition, this paper formularized the efficiency of low calorie oil gas mixed with LPG.
根据间接蒸发冷却过程的热力学特性，定义了间接蒸发冷却器的火用效率计算公式。
The exergy efficiency of indirect evaporative cooler is defined based on analyzing the thermodynamic performance of heat and mass transfer process.
按照参量互作用的观点推出多维声电光效应的耦合波方程，并给出多维声电光效应衍射效率计算公式。
The coupled wave equation of multi dimensional Acousto electro optic(AEO)effect is derived according to the opinion of parameter interaction.
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