下面利用有限积分法模拟形状变化和光刻精度产生的缺陷对负折射谐振频率和通带的影响。
Finite integration technique (FIT) is used to simulate the effects of shape change and optical printing precision on resonant frequency and the pass band of negative refractive index material.
数值算例表明，用精细积分法得到的解与精确解十分吻合，比有限差分法具有更高的精度。
The results of the precise integration method agree well with the theoretical solution and have higher precision than those of the finite difference method.
与传统的有限单元法和常用的时间积分法相比，时空有限元在精度和稳定性方面具有一定的优越性。
Compare to the conventional finite element method and common-used time integration methods, the space-time finite element method has some advantages in precision and stability.
用有限元法解决天线内部的赫尔姆霍兹方程； 用边界积分法确定天线外部的场；
We use the FEM to solve the Helmholtz equation in the interior of the antenna and use the boundary-integral method to determine the fields exterior to the antenna.
用有限元法解决天线内部的赫尔姆霍兹方程； 用边界积分法确定天线外部的场；
We use the FEM to solve the Helmholtz equation in the interior of the antenna and use the boundary-integral method to determine the fields exterior to the antenna.
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