【Key words】 dual-source gas internal-combustion engine heating system; economic evaluating index; environmental temperature; generating efficiency; coefficient of performance
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燃料经济性评价指标的计算，包括等速过程、加速过程、减速过程和多工况燃料消耗量的计算。
The calculation of fuel economy includes the calculation of uniform velocity, accelerating process, decelerating process and fuel consumption under multi-working conditions.
研究CAPP系统的技术经济评价问题，提出将加工成本和质量损失成本总和最小作为CAPP系统的经济性评价指标；
The paper presents the technical economy assessment of CAPP system. Minimal sum of machining cost and quality loss cost is regarded as economical evaluation criterion of CAPP system;
本文运用价值分析的方法，对汽车动力性和燃油经济性的加权综合评价指标进行了研究。
Using the method of value analysis, a comprehensive weighted evaluation parameter for automotive dynamics and fuel economy is discussed in the paper.
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