直流电流源或电压源。可指定交流分量的大小。
DC current or voltage source. Magnitude of AC component can be specified.
将任意分布的电流源产生的电磁场看作是电偶极子产生的电磁场的叠加，利用镜像法推导了上半空间中的垂直直流电偶极子在两层媒质中产生电磁场的解析解。
The analytical expressions of the electromagnetic field generated by the DC electric dipole in the upper space for the two-layer mode were obtained by using the method of mirror image.
介绍600 A直流电流标准源具有10 ~ 600 A直流标准电流输出能力。
The 600a dc standard current source is designed in this paper, which can output 10 ~ 600a dc current.
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