To take advantage of characteristics of immittance converter, DC voltage is converted into sine-wave high frequency current and is isolated by high-frequency transformer, then three-phase sine-wave current source is achieved through cycle-converter split-phasemodulation.

本系统利用导抗变换器的电压源?电流源变换特性,将输入直流电压变换为高频正弦电流,经高频变压器隔离及电流等级变换后进行裂相调制,输出为三相正弦电流。

The investigation for the existence of splitting BIBDs has theoretical sig-nificance and is closely connected with design theory,graph theory and splitting authentication codes.

对分裂平衡不完全区组设计的研究不仅有它的理论意义而且它和设计理论、图论以及分裂认证码有着密切的联系。