...Power Conversion Circuit），对其进行控制的技术，它是电力电子技术的核心，理论基础是电路理论（Theory of Electric circuit）。电力变换分为四大类：交流-直流、直流-交流、直流-直流和交流-交流。
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This method is applied in solving the problem of computer aided analysis of an electro-magnetic field on the basis of electric circuit theory.
有限网络法利用电路理论来解决电磁场计算机辅助分析的问题，有一定的实用价值。
Electric circuit with controlled sources is both an emphasis and a nodus in teaching of Electric circuit Theory.
含受控源的电路在“电路”课程教学中既是难点又是重点。
This paper simply described several algorithms of reactive power, and investigated reactive power theory of the non-sinusoidal electric circuit and its algorithm of measurement.
简述了几种常用的无功功率测量算法，对非正弦电路无功功率理论及其无功功率测量算法进行了研究。
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