Two basic assumptions of the classical economic order quantity (EOQ) model are the model has infinite horizon and the costs are static.
经典的经济订购批量（EOQ）问题有两个基本假设：时域无限和模型的费用参数不变。
Used basic physics law, the classical theory of photovoltage is corrected, and a new photovoltage model is established in this paper.
本文应用物理学基本定律修正了经典光伏理论，并建立了新的光伏模型。
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