Reasons for the decline in power performance of LPGV engine under driving cycle of city are analyzed using engine cycle theory under steady-state condition.

从稳定工况下的发动机循环理论出发，分析了城市工况下LPGV车用发动机动力性能下降的原因。

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The kinds of analysis that report massive, sustained, falling costs for renewable plants often assume that capital costs are recovered in steady-state fashion over the full, rated, life-cycle of the machinery, when in fact investors in these systems always strive to recover their costs much sooner to beat the diminishing returns that set in once two-thirds of the life-cycle is spent.

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