The corresponding variation equation has also been derived to solve this problem.
为了获得该椭圆边值问题的解，推导出了有限元求解变分方程。
Second, the variation equation corresponding to the 2-D boundary value problem is derived.
然后导出与二维边值问题相应的变分方程；
In this paper, a transition matrix of blower blade is set up by the variation equation of stead flow of gas.
本文利用稳态气流的变更方程，建立了风机叶轮的转移矩阵。
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