In this paper, three methods are carried out to calculate and comparative analyze the mean wave direction, the same as mean wave length with four methods.
本文采用三种方法计算平均波向、四种方法计算平均波长并进行比较分析。
We compartmentalized two periods to calculate economic benefits and adopted two methods to analyze benefits in 1949~1990 and 1990~2005.
治涝经济效益计算与分析分两个时段进行，1949～1990年及1990～2005年，采用两种不同的方法进行评价。
Methods a mathematical model of uncertainty was set up to analyze and calculate the various components of uncertainty.
方法建立不确定度的数学模型，系统分析计算不确定度的各个分量。
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