The finite - difference frequency - domain method with preconditioned conjugate - gradient technique is presented for three - dimensional electromagnetic scattering problems.

引入预条件共轭梯度法,提出了结合频域有限差分法分析三维电磁散射问题.

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This paper a Preconditioned Conjugate Gradient ( PCG ) method from a view of probability for concrete image reconstruction.

根据常规图像重建的共轭梯度迭代算法,提出一种预条件共轭梯度法.

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