本文给出了数值求解一类偏积分微分方程的二阶全离散差分格式。

In this paper, the second order fully discrete difference method for a partial integro-differential equation is considered.

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首先通过横向积分将中子扩散方程化为三个互相耦合的一维偏通量方程。

First, the neutron diffusion equation is converted to three coupled one dimensional partial flux equation through transverse integration.

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针对SPWM全桥逆变器中存在的直流偏磁现象，提出了数字PI电压积分调节方法。

A digital PI voltage integral regulating method, as proposed in the paper is directed at overcoming the flux imbalance phenomena in the SPWM full-bridge inverter.

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