当管道半径远大于线圈尺寸时，管壁可看作平板导体，问题得到简化。
When the tube radius is far greater than the coil size the tube wall can be considered as a conducting plate that can be easily simulated.
提出了一种求解任意形状线圈位于平板导体上方时矢量磁位的解析方法。
An analytical solution to the vector potential is presented in this paper, which is produced by arbitrary shape eddy-current probes above conducting slabs.
提出了一种求解任意形状线圈位于平板导体上方时矢量磁位的解析方法。
The fast multipole method(FMM) is introduced to solve the magnetic vector potential in 3-D electromagnetoquasistatic field.
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