Then analyzes how to identify the requirements, reduce the cost and increase the explicit and tacit function of project.
然后运用价值工程的方法，分析了如何合理地确定需求、压缩成本、提高项目的显性功能与隐性功能；
The utility cost function is considered, which includes the increase of trip expense and trip time, reduction of comfort and decrease of convenience during the transfer.
该效用损失函数充分考虑了居民换乘导致出行时间和费用的增加以及舒适性和方便性的损失。
The optimization of the ecological function makes the entropy generation rate of cycle decrease greatly and the thermal efficiency increase with the cost of a little decreasing of the power output.
生态学优化以牺牲小部分输出功率为代价，较大地降低了循环的熵产率，而且在一定程度上提高了热机效率。
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