利用柯西黎曼条件和偏微分方程理论，得到了一类非线性RH问题的求解方法，并通过实例表明该方法是可行的。

In this paper, we get a method to solve a non-linear RH problem by the Cauchy-Riemann conditions and the theories of partial differential equation.

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文章利用达布和理论，讨论了黎曼积分的可积性问题，给出了一个可积的充分必要条件。

Based on Darboux theory, this paper discussed the integrability of the Riemann Integral and provides a necessary and sufficient condition for integrability.

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分析了诸多积分概念的共性，抽象出黎曼积分的定义，给出了黎曼可积的条件。

This paper sums up the common character of the concept of many integrals, abstracts the concept of Riemann integral and gives the integral conditions of the Riemann integral.

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