The traditional DEA model appling to measure the port efficiency in previous researches is proved to be valuable.
国内外研究港口效率的方法较多,其研究取得了一定的成果,尤其是非参数方法DEA模型的应用。
参考来源 - 我国集装箱港口效率评价研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Port efficiency is in turn linked to ownership structure.
而港口效率与所有权结构则息息相关。
There have also been carbon reduction projects focusing on energy efficiency in street lighting in Ethekwini, Cape Town, Johannesburg, Tshwane, Rustenburg, Polokwane and Port Elizabeth.
碳减排工程也聚焦于城市街道照明的能效，参与城市包括德班、开普敦、约翰内斯堡、茨瓦内（Tshwane）、勒斯滕堡、波洛（Polokwane）和伊丽莎白港。
The efficiency of steering pump of port tractor lost very heavy when engine was in high speed.
港口牵引车液压系统中的转向泵在发动机高速状态时的能量损失较大。
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