A new method for calculating Euler equations is presented by means of the theory of reproducing kernel space and finite difference method.

利用再生核理论和有限差分法给出了一种计算欧拉方程组的新方法。

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In this paper the error caused by grinding heat is analyzed by using methods of finite element and finite difference, and the theory datas are contrasted.

本文利用有限差分和有限元两种方法对磨削热引起的误差进行了分析，并对理论数据进行了对比。

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Finally, we investigate the unidirectional transmission behavior of PC molecules consisting of nonlinear defect pairs by use of the coupled mode theory and the finite-difference time-domain technique.

最后，我们利用耦合模理论和有限时域差分技术研究了非线性缺陷对构成的光子晶体分子的单向导通行为。

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