由于准则方程的高次非线性和复杂性，文中利用复合函数求导法则，直接针对基本随机变量求解。

Because of the complexity and high order nonlinear property of the criterion, a derivative method for compound function is used to get reliability.

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对多元抽象复合函数的高阶求导进行了讨论，利用代换的思想，得到了对其进行高阶求导的简便易行的方法。

This paper is to discuss the higher-order derivative of many-variables abstract composite function, and to put forward the easy method to this type of questions through substitution.

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利用复合函数的求导规则和级数理论能够得出 贝努利数的简明公式■ ，在理论和应用上都具有重要的价值。

There is a simple formula of Bernoulli number with using extraction a derivative rule of compound function and progression theory and so a given important value in the theory and application.

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Now, I hope you guys know that much calculus, that when you take a derivative of a function of a function, namely v square over 2 is a function of v, and v itself is a function of t, then the rule for taking the derivative is first take the v derivative of this object, then take the d by dt of t, which is this one.

我希望你们了解更多的微积分知识,当你对复合函数求导时,也就是说v^/2是关于v的函数,而v本身是关于t的函数,求导的法则应该是,第一步是这一部分对v求导,然后v再对t求导,得到这一部分

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