功能评价方法常采用功能成本法和功能指数法。
Function evaluation methods usually include function cost method and function index method.
而逻辑产品没有载体，本文在分析逻辑产品特点的基础上，研究其功能成本分析问题。
But logistic products have no carrier, the paper analyses characteristics of logistic products and study on its Function-Cost Analysis.
这种方法的特点是除了考虑各功能之间的相对重要性外，还考虑了功能成本对功能系数的影响。
The characters of this method lie in that the effect of function costs on function coefficient is considered apart from the importance of every function.
本文应用理论计算法，推导出输油（气）管道功能成本方程，并根据工程实际，绘制出了功能成本曲线图。
The theoretical calculation method is applied to pipelines in this paper The function-cost equation in oil and natural gas pipelines is deduced. According to practice, the curves of F-C are drawn.
本文应用理论计算法，推导出输油（气）管道功能成本方程，并根据工程实际，绘制出了功能成本曲线图。
The theoretical calculation method is applied to pipelines in this paper The function-cost equation in oil and natural gas pipelines is deduced. According to practice, the curves of F-C are drawn.
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