【Key words】 dual-source gas internal-combustion engine heating system; economic evaluating index; environmental temperature; generating efficiency; coefficient of performance
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Effects evaluation of public marketing has significant social and economic meanings, designing the evaluating index system, choosing scientific and rational evaluating methods are necessary.
公共营销绩效评估具有重要的社会和经济含义，设计评价指标体系、选择科学合理的评估方法是科学营销所必需的。
Integrated airline fleet assignment can enhance the quality and efficiency, but at present, there is not a technology economic index for evaluating the quality of fleet dispatching.
机队集中调度能够提高机队调度的质量和效率，但目前缺乏评估机队调度质量的技术经济指标。
The cost of wheat production is the comprehensive technical and economic index for evaluating the advantage of wheat production.
小麦生产成本是评价小麦生产比较优势的综合性技术经济指标。
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