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学习了“人民长江”1957年8月号杨远东同志所作“用‘变量变差法’①计算水库蓄水保证率曲线”一文以后,我们认为:就“变量变差法”这一公式本身的数学推理来说,是正确的。它可以很容易地求出两个变数偶然规律均符合于皮氏三型曲线的总和保证率曲线,这是无庸置疑的。但文中认为应用“变量变差法”可以很方便地计算水库蓄水保证率曲线这一说法:则是我们所不能同意的。以下简单地提出我们对这个方法的应用范围的一些看法,供同志们参考,希望杨同志及读者指正。
After learning from the article “Calculating the reservoir water storage rate curve” by Comrade Yang Yuandong in the “People’s Yangtze River” in August 1957, we think: As far as the “variable variation law” formula itself Mathematical reasoning is correct. It is easy to find that the contingency rule of both variables is in line with the sum guaranteed rate curve of the Pearson-type curve, which is beyond doubt. However, in the paper, it is easy to calculate the reservoir water storage rate curve by using “variable variation method”: we can not agree with it. The following simply put forward some of our views on the scope of application of this method for reference by comrades and I hope that Comrade Yang and his readers will correct me.