求翻译：通过向所需研究的节点注入幅值为1的电流, 其余节点的注入电流置为零, 求解式(1)所得的电压即为该节点的谐波输入阻抗和相应各节点间的转移阻抗。当注入电流的频率在一定范围内变动时, 可得相应谐波阻抗- 频率的分布图, 从图中曲线的谷值和峰值可确定该节点发生串、并联谐振的频率。是什么意思？

By node injection amplitude to the required research for a current, the injection current of the remaining nodes set to zero, solving equation (1) the transfer impedance between the harmonic input impedance of the resulting voltage is the node and the corresponding node. When the injection current f

Through the research required to fill in the node of the current value of 1, and the rest of the nodes of the injection current to zero, the (1) of the proceeds from the node voltage is input impedance of the harmonic and the corresponding transfer impedance between the nodes. When the Injection cur

Through to the desired node into the current amplitude is 1 of the study, the remaining node injection currents resets to%