When exciting Sin voltage source is applied to proper port, the stability of network depends on the sign of active and reactive components for fundamental-wave current entering port of networks.
若在适当端口施加正弦电压源，则网络的稳定性取决于进入端口基波电流的实功与虚功成份的符号值。
2
The application of ultrasonic wave to dyeing soybean fiber is studied with the example of bifunctional reactive dyes.
文章以双官能团活性染料上染大豆蛋白纤维为例，对超声波在染色中的应用进行了研究。
3
There exist two regions in open guiding wave structures, bound region and radiation region, and the radiation region is divided into antenna region and reactive region.