This method could efficiently overcome the numerical oscillation and improve the calculation accuracy in spatial to second order.
普通的迎风差分格式只有一阶精度，修正的迎风差分格式可以把空间的计算精度提高到二阶。
Historical flood is the flood that has occurred in the local area. Using historical flood investigation can improve the calculation accuracy of design flood.
历史洪水是当地历史上曾经发生的，应用历史洪水调查可以提高设计洪水计算精度。
At the same time, the weight coefficients of plate width and rolling force have been used in the calculation of roll shape in order to improve the calculation accuracy.
同时为使设计出的辊型更趋完善，在计算过程中还引入了压力、板宽加权系数。
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