我们通过对实际问题的分析，用微积分的方法建立了冰山运输的数学模型。
We first build the mathematical mode of transport of icebergs by means of assumption of the mode.
本文通过对设计模式方法的研究，并且结合招生行业的实际问题，提出了基于解耦模式的数据访问策略。
Through the study of design pattern and practical problem in enrollment trade, the text proposes the data access model based on solving coupling problem.
并通过公式推导及具体数据计算，找出两种不同处理结果的误差，及对解决工程实际问题的影响。
By formula deriving and data calculating, the errors resulted from the two different methods are obtained, and their effects on solving practical engineering problems revealed.
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