Dual - frequency antenna is indispensable part to transient process from 2 G to 3 G.

双频天线是移动通信系统由2G向3G过渡过程中不可缺少的部分.

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The transient process of graded series capacitor during grade change controlled by thyristor is studied.

研究了晶闸管控制的分级串联电容换级时的暂态过程.

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The mathematical model of turbofan engine transient process with thrust vectoring nozzle was established.

建立带矢量喷管的涡扇发动机动态数学模型.

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The asymmetric electromagnetic transient process after switching - on two phase supply is studied in the paper.

该文研究接入两相电源后的不对称电磁过渡过程.

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