As you discover a genuine need for something (genuine being the operative word), take it out of storage with a clear conscience.
当你发现你真正需要某样东西(真正的需要的话)，已明确的目的把他们取出来。
This paper take pumped storage station and diversion type power station as typical objects of study and gives out a global optimal model of the parameters of the water way structures.
本文以抽水蓄能电站及有压引水式水电站为典型对象对水力系统各建筑物建立了整体参数优化数学模型，其后又针对该模型的目标函数不可求导、计算量大、维数多、非线性的特点。
This paper take pumped storage station and diversion type power station as typical objects of study and gives out a global optimal model of the parameters of the water way structures.
本文以抽水蓄能电站及有压引水式水电站为典型对象对水力系统各建筑物建立了整体参数优化数学模型，其后又针对该模型的目标函数不可求导、计算量大、维数多、非线性的特点。
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